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介孔材料
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本人专业是材料，具体涉及介孔。因此对介孔材料从合成表征，到形成机理，到性能应用都很感兴趣。但是无奈自己资质愚钝，又不奋发，因而学识寡漏。本人发起这个主题，只能算是抛砖，希望引来各位介孔方面的能人施玉。 而从事介孔的，或是对介孔有兴趣的学术朋友汇集于此，共享资源，畅谈介孔，可谓快哉。 我还是以介孔方面出现的文献为内容，介绍介孔制备方面的发展： 1.介孔材料的诞生－－1992年MS41系列分子筛(典型的是MCM-41,MCM-48,MCM-50)的合成（严格来讲，应该是1991年日本人合成出来）： Nature. 1992, 359, 710-712（J. S. Beck） J Am Chem Soc. 1992, 114: 10834-10843（J. S. Beck） Science. 1993, 261: 1299-1303(霍启升） 2.介孔材料制备的另一里程碑－－1998年赵东元合成了SBA-15 Science. 1998, 279: 548-552（赵东元） J. Am. Chem. Soc. 1998, 120, 6024-6036 （赵东元） 3.通过硬模板法合成炭基介孔材料，也是一大重要成绩－－1999年由韩国人刘龙完成： J Am Chem Soc. 2002, 124: 1156-1157( Ryoo R.) [ Last edited by 604gq on 2008-3-26 at 15:02 ] |
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了解介孔，读读这篇转贴而来“介孔漫谈”，会有收获
popsheng(金币+0):以前在小木虫也看过，不过再读一遍还是很有感触
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小弟近年涉入介孔材料合成的领域，在介孔材料合成方面作了一些工作，想简单谈谈介孔材料的所谓的几个牛人，才疏学浅，权且算是抛砖引玉吧。 介孔材料的兴起以Mobil公司的科学家在1992年的Nature上报道发明了M41S家族为标志，以表面活性剂为模板经超分子组装合成高度有序的介孔材料，这种具有规则孔道（2～50 nm可控），巨大的表面积（300～2000平米每克）的SiO2分子筛由于在催化，材料，生物等领域有潜在的应用得到了科学家的广泛的兴趣。事实上 1991年日本人率先研究发现了介孔材料的合成，可惜孔道不规则，且发表在日本化学会刊上，未能得到关注。 在此之后Mobil公司没有继续报道他们的成果，估计改到作应用了。有趣的是，催化科学家终于可以发高档次论文，于是在Nature，Science （NS）上不断灌水，其中的马力最强的灌水机当属Pinnavaia和Stucky。 Pinnavaia最大的贡献是采用非离子取代先前的CTAB或CTAC离子型表面活性剂合成了无序的介孔分子筛HMS与MSU。最近此人又在 Science灌了一篇，好像说是变有序了。Sigh，看看人家的工作，作一篇发一个Science，工作量跟咱们郑仙（注：厦大郑兰荪院士，当时郑发表了一篇science，用了10年之功）没的比。Pinnavaia搞催化出生的，工作主要集中在介孔硅，铝硅酸盐，磷酸盐等分子筛的合成。 Stuckyhttp://www.chem.ucsb.edu/%7Estuckygroup/stuckygroup/无疑是介孔材料的超大牛，做的SBA-n系列分子筛篇篇都上NS去了。值得一提的是，绝大部分成绩的取得不是什么所谓的领导支持，上级关注得来的，全是咱们中国留学生帮他干的。而绝大部分的中国留学生都是吉林大学出来的，如霍启升，赵东元等杰出代表。（纳米领域现在的另一水王有个名叫彭小刚（Peng X G，合成CdSe的，现在阿肯色大学当教授，阿肯色，嘿嘿，多读几遍就知道是好地方了,都是吉大的，sigh，咱们厦大还是缺这种的。）霍现在好像不干科研了，赵现在复旦大学当长江学者了。国内在介孔领域无疑他是最强的，放眼整个亚洲，也算是数一数二了。韩国这边Kaist（韩国最好的理工大学，虽然是 Institute，地位如MIT在美国的地位）的Ryoo组也算是超NB人物之一了，特别在利用硅分子筛为模板合成介孔碳分子筛方面得到了广泛关注，http://rryoo.kaist.ac.kr/main.html Pinnavaia和Stucky都曾重复他的工作。 个人感觉目前介孔搞的好的基本都是从Stucky的研究小组出来的。如欧洲那边的牛人Ferdi Schuth也曾在他们组干过。韩国目前也有两个年轻教授在介孔领域也算初出茅庐，都是Ryoo的博士生，后到Stucky组作博士后了。Stucky做得领域确实够广，产业化的可能性无疑是最高的。而赵东元无疑也算是继承它的衣钵了，看他在复旦化学系发的文章，也难怪能参加院士评选进入最后一轮。当然跟国际上纳米领域的水王：王中林，夏幼南，杨培东还有上文说的彭也还是有段差距的说。个人认为Stucky最突出的贡献是在介孔材料的合成机理上（和霍一起干的），以及三篏段共聚物为模板合成水热稳定的介孔材料（和赵一起的，特别是SBA－15）。 马上他们组又来了后来成为纳米ZnO一维材料合成方面的水王的哈佛大学博士杨培东，杨在他们组作博士后发了NS各一篇。其中发在Nature的三篏段共聚物为模板合成过渡金属氧化物的论文工作至今无人重复出来。当然各科学家的虚伪性来了，我估计他们用TEM一不小心照了个好的区域，于是说： “哇，哈哈哈！I’m so NB, all the samples are highly ordered！“以偏概全，局部代替全部也算是做纳米的人的基本思路了，sigh！吸口气再来。包括我的投的论文也只好引用他的工作，虽然知道不能重复，谁叫偶不是牛人呢？当然，却有一个大牛出来说了，容后再谈。 介孔材料的发现无疑催化学家大大发了文章，把原来沸石分子筛的东东再倒腾了一下，而国际上的材料合成的杂志上出现了大量的meso等相关名词。如 microporous materials 杂志都把名字改成了 microporous and mesoporous materials. 分子筛的合成一般采用沉淀法合成，但介孔薄膜的合成却并非如此，毕竟若采用相同的沉淀法合成将无法拉膜成型。这时搞催化的人是罩不住了，无疑sol－ gel 的大师人物该出来说话了。其中Brinker C. J.和Sanchez C.无疑是最杰出的。上次本人打算投稿到J. Sol-Gel. Sci.&Tech杂志上，（搞介孔发这种文章说明作的不怎么样），在投稿须知里面，参考文献的书写方法指导给出的三个“种子”，有两篇就是他两各一的。其中Brinker那本溶胶凝胶被Sanchez称为该领域的bible，至于我老板也是非常推崇的。 早期虽然有很多NS的报道说介孔薄膜合成出来了，但有相当部分是Ozin报道的，所以无人能重复（此部分另外展开），到97年Brinker在 Nature上挖坑，报道了蒸气诱导自组装（EISA）合成方法之后，大家就纷纷跟着灌水了。当时Brinker手下也是中国学生Lu Yunfeng, Fan Hongyou（都是吉大化学系的，都在米国大学里当教授了。介孔材料的热门也成就了无数人的理想，中国人也算分得一杯羹了，我这个70年代末出生的又赶不上末班车了，ft）。Brinker研究组年年至少一篇NS的paper。至于发Adv. Mater.和JACS那就像当年我在化院版灌水那么easy。 Brinker搞有机硅的溶胶凝胶出来的，工作当然主要集中在介孔SiO2薄膜上，他们合成和应用都做得不像是人作的那种，狂ft。而对于主要作过渡金属化合物的牛法国人Sanchez来说，当然是扩展到介孔过渡氧化物薄膜合成。http://www.ccr.jussieu.fr/lcmc/ 这里要提到David Grosso，此人在合成介孔薄膜的牛人Pierre-Antoine Albouy读完博士之后开始到Sanchez组工作，在此之前Sanchez主要从事有机无机杂化材料在光学领域的应用。同时他们对TiO2的组装进行了深入的基础研究，到2001年终于在Adv. Mater.上报道了350度下高度有序的介孔TiO2薄膜，随后Sanchez把他的牛人本色发挥的淋漓尽致，短短几年间在JACS，Angew. Chem., Chem.Comm.等杂志发表了一系列papers。同时他的Review更是他的不比它的研究论文少，都上了Chem Rev以及Adv.Func. Mater.的特写文章里了。（注：最近又上了2篇Nature Materials，一篇review 一篇letter） 我的导师曾在2002年MRS春季会议上遇到过Sanchez，老板去请教他问题，结果被搞的PP的，据他说Sanzhez此人是特别高傲，拽的半死！ sigh，2004年跟我谈起他的时候老板还有点ft，呵呵，我估计另一件事情就是他对中国MM也很ft。题外话，罪过。（注：老板跟我侃大山的时候，读起他博士的时候跟中国mm一起作实验，mm老是对他指手画脚，搞的他郁闷的不行，遇到韩国人都说要小心中国mm）而Grosso还算比较友好对我老板。呵呵。Sanchez写论文都是讲别人作的很烂，或表征数据不完善等等，然后引出自己的工作。我一直觉得Sanchez对Brinker十分推崇，倒是对 Stucky有点不以为然似的，我读他的论文有这种感受，莫非是瑜亮情结的说，呵呵，无聊猜测，一笑。上面说过杨培东的文章被置疑的事情就是 Sanchez说的。当然介孔材料的合成有所保留也是应该的，但是杨培东和赵东元似乎后面也没有再重复出来过。不由想起中山大学徐安武被介孔材料方面的牛人Bao Liang Su置疑，分别在AngewChem和ChemMater上说他的ZSU上至Angew Chem下至Chem Comm七篇全是artificial。有兴趣可看看http://www3.interscience.wiley.com/cgi-bin/jissue/104524420 中的Korrespondenz. 最后说一下 Ozin G. A.，这个人我实在佩服他，上面讲过Ozin的工作通常是不能重复的，可是他NS一向没少发，狂ft。1971年他发表的第一篇Nature文章居然是激光拉曼光谱，呵呵。大家有兴趣可看看他的publications中最后一栏的Adv Mater 和AFM就知道了。Ozin的主页是这些人当中做得最好的，(注:艺术价值有5层楼那么高),地址是： http://www.chem.toronto.edu/staff/GAO/flashed/menu.htm |
20楼2007-04-27 20:13:24
7楼2007-04-26 21:38:17
★ ★ ★ ★ ★
popsheng(金币+2):兄弟辛苦了
popsheng(金币+3,VIP+0):也是一份劳作
popsheng(金币+2):兄弟辛苦了
popsheng(金币+3,VIP+0):也是一份劳作
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已经发在纳米版且和介孔相关的资源的链接（发贴人，帖子标题和链接）： 作者：wpj104 标题：两篇有机-无机介孔材料综述 http://muchong.com/bbs/viewthread.php?tid=345350&fpage=8 作者：blueskyami 标题：求助! 求BJH孔径分布公式 http://muchong.com/bbs/viewthread.php?tid=385491&fpage=12 作者：天蓝色的梦 标题：推荐最新发表在化学通讯上有关介孔材料的综述文章 http://muchong.com/bbs/viewthread.php?tid=424981&fpage=9 作者： 标题：发几个很好的介孔方面的PPT http://muchong.com/bbs/viewthread.php?tid=396138&fpage=9 作者：pobi0608_ren 标题：上好的碳纳米管及介孔分子筛 http://muchong.com/bbs/viewthread.php?tid=428283&fpage=9 作者：xpy111 标题：一篇不错的孔材料的综述 http://muchong.com/bbs/viewthread.php?tid=354292&fpage=6 作者： 标题：2006年Angew上一篇关于介孔材料的重要综述 http://muchong.com/bbs/viewthread.php?tid=373425&fpage=5 作者： 标题：J. Materi.Chem. 上纳米方面最新综述文章(2005-2007)（部分为介孔文献） http://muchong.com/bbs/viewthread.php?tid=382748&fpage=4 作者：physchemboy 标题：赵东元在Chem.Comm.的feature artical http://muchong.com/bbs/viewthread.php?tid=461046&fpage=1 [ Last edited by 604gq on 2007-4-28 at 16:41 ] |
30楼2007-04-28 15:56:07
2楼2007-04-26 17:28:33
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
popsheng(金币+3):3X
popsheng(金币+30,VIP+0):2007年纳米版最佳专题贴！
popsheng(金币+3):3X
popsheng(金币+30,VIP+0):2007年纳米版最佳专题贴！
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介孔相关的几个牛人的课题组： http://www.mrl.ucsb.edu/mrl/info/publications/ （G. D. Stucky) http://www.cem.msu.edu/~pinnweb/ （Thomas J. Pinnavaia） http://www.chem.toronto.edu/staff/GAO/flashed/menu.htm （Ozin's group） http://homepage.fudan.edu.cn/~dyzhao/ （赵东元） http://rryoo.kaist.ac.kr/pub.html (韩国刘龙 （R. Ryoo）) http://cheed.nus.edu.sg/~chezxs/Zhao/publication.htm（新加坡赵修松 Xiusong Zhao) http://www.ucm.es/info/inorg/inv ... iones/2001/2001.htm (西班牙M. Vallet-Regi 首先把介孔材料应用到药物缓释） 因为以前不小心把自己的收藏夹弄没了，所以有还有几个课题组现在没有了链接，但是其课题负责人还是记得： 台湾的牟中原和他的弟子林弘平 上海硅所的施剑林 吉林大学的肖丰收和裘式伦 大化所的包信和（涉及得不多） [ Last edited by 604gq on 2007-4-26 at 17:36 ] |
3楼2007-04-26 17:30:55
★ ★
popsheng(金币+2):3x
popsheng(金币+2):3x
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推荐几篇介孔材料重要的综述： Chem. Mater. 1996, 8, 1147-1160 Surfactant Control of Phases in the Synthesis of Mesoporous Silica-Based Materials(Stucky和霍启升 表面活性剂的堆积参数和结构的关系） Chem. Rev. 1997, 97, 2373-2419 From Microporous to Mesoporous Molecular Sieve Materials and Their Use in Catalysis（主要介绍介孔作催化载体的应用） Chem. Rev. 2006, 106, 3790-3812 Advances in the Synthesis and Catalytic Applications of Organosulfonic-Functionalized Mesostructured Materials（有机官能化介孔的合成及在催化中的应用） Acc. Chem. Res. 2002, 35, 927-935 Structural and Morphological Control of Cationic Surfactant-Templated Mesoporous Silica（牟中原 具体谈论介孔形貌的形成） Angew. Chem. Int. Ed. 2006, 45, 3216–3251 Silica-Based Mesoporous Organic-Inorganic Hybrid Materials（Frank Hoffmann 所著，非常好） Acc.Chem.Res.2005, 38,305-312 Past, Present, and Future of Periodic Mesoporous Organosilicas-The PMOs（O'zin 重点介绍周期性介孔） NATURE 2002 417 813 Ordered porous materials for emergeing application （大牛Davis所著） Chem. Mater. 1999, 11, 2633-2656 Tailored Porous Materials(Thomas J.) |
5楼2007-04-26 20:50:31
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
popsheng(金币+3):无话可说了，只有加分了
popsheng(金币+10,VIP+0):个人认为这是纳米版成立至今最用心的一贴了！
popsheng(金币+3):无话可说了，只有加分了
popsheng(金币+10,VIP+0):个人认为这是纳米版成立至今最用心的一贴了！
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介孔分子筛的应用： 介孔分子筛吸附氨基酸： Carbon 44 (2006) 530–536 Adsorption of L-histidine over mesoporous carbon molecular sieves(印度人 A. Vinu） Separation and Purification Technology 48 (2006) 197–201 Amino acid adsorption onto mesoporous silica molecular sieves （首篇） 介孔分子筛吸附蛋白质（酶） Journal of Molecular Catalysis B－ Enzymatic 2（1996） 115－ 126 Enzyme immobilization in MCM-4 1 molecular sieve（首篇） J. Am. Chem. Soc. 1999, 121, 9897-9898 Mesoporous Silicate Sequestration and Release of Proteins（stucky) J. AM. CHEM. SOC. 2004, 126, 12224-12225 Protein Encapsulation in Mesoporous Silicate-The Effects of Confinement on Protein Stability, Hydration, and Volumetric Properties J. Phys. Chem. B 2003, 107, 8297-8299 Adsorption of Cytochrome C on New Mesoporous Carbon Molecular Sieves(Vinu, A) 介孔分子筛负载催化剂 J. Phys. Chem. B 2006, 110, 15212-15217 Fabrication and characterization of mesoporous Co3O4 core-mesoporous silica shell nanocomposites（典型的core－shell结构） CHEM. COMMUN., 2003, 1522–1523 Ultra-thin porous silica coated silver–platinum alloy nano-particle as a new catalyst precursor Applied Catalysis A General 308 (2006) 19–30 Carbon oxide hydrogenation over silica-supported iron-based catalysts Influence of the preparation route Chem. Commun., 2005, 348–350 Metallic Ni nanoparticles confined in hexagonally ordered mesoporous silica material 介孔分子筛在药物可控释放方面的应用 Chem. Mater. 2001, 13, 308-311 A New Property of MCM-41, Drug Delivery System（Vallet-Regi 首篇） Nature 2003, 421, 350 – 353 Photocontrolled reversible release of guest molecules from coumarinmodified modified mesoporous silica（第一次只能化） J. AM. CHEM. SOC. 2005, 127, 8916-8917 Fabrication of Uniform Magnetic Nanocomposite Spheres with a Magnetic Core-Mesoporous Silica Shell Structure-support（施剑林 所谓的“药物分子运输车”） Angew. Chem. Int. Ed. 2005, 44, 5038 –5044 Stimuli-Responsive Controlled-Release Delivery System Based on Mesoporous Silica Nanorods Capped with Magnetic Nanoparticles（Victor S.-Y. Lin* 在智能介孔药物释放方面是贡献巨大） 介孔分子筛吸附废水阳离子 Chemosphere 59 (2005) 779–786 Heavy metals removal from electroplating wastewater by aminopropyl-Si MCM-41 Environ. Sci. Technol.2000, 34,4822-4827 Surfactant-Templated Mesoporous Silicate Materials as Sorbents for Organic Pollutants in Water Ind. Eng. Chem. Res. 2004, 43, 1478-1484 Highly Selective Adsorption of Pt2+ and Pd2+ Using Thiol-Functionalized Mesoporous Silica 介孔分子筛在色谱中的应用 Chem. Commun., 2002, 752 - 753 Biomolecule separation using large pore mesoporous SBA-15 as a substrate in high performance liquid chromatography Electrophoresis 2006,27,742–748 Large-pore mesoporous SBA-15 silica particles with submicrometer size as stationary phases for high-speed CEC seperation 介孔分子筛作为硬模板 Adv. Mater. 2001, 13, 677-681 Ordered Mesoporous Carbons（Ryong Ryoo） Microporous and Mesoporous Materials 63 (2003) 1–9 Synthesis and characterization of spherical carbon and polymer capsules with hollow macroporous core and mesoporous shell structures 介孔分子筛复合材料（实现光学性能，比如掺入二氧化钛，量子点） J. Phys. Chem. B 2005, 109, 12309-12315 Synthesis and Characterization of Nano titania Particles Embedded in Mesoporous Silica with Both High Photocatalytic Activity and Adsorption Capability Chem. Mater. 2005, 17, 1269-1271 Preparation of Mesoporous Titania Thin Films with Remarkably High Thermal Stability J. AM. CHEM. SOC. 2006, 128, 688-689 Magnetic Fluorescent Delivery Vehicle Using Uniform Mesoporous Silica Spheres Embedded with Monodisperse Magnetic and Semiconductor Nanocrystals 介孔分子筛薄膜 [ Last edited by 604gq on 2007-4-27 at 20:36 ] |
6楼2007-04-26 21:37:16
8楼2007-04-27 00:35:35
★ ★
604gq(金币+2):3X 很有代表性的综述
604gq(金币+2):3X 很有代表性的综述
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Mesoporous templated silicates: an overview of their synthesis, catalytic activation and evaluation of the stability. Adv Colloid Interface Sci. 2003 Apr 25;103(2):121-47. color] Linssen T, Cassiers K, Cool P, Vansant EF. Laboratory of Adsorption and Catalysis, Department of Chemistry, Universiteitsplein 1, B-2610 Wilrijk, Belgium. thierry.linssen#ua.ac.be The most recent developments in the formation of new mesoporous templated zeolitic materials, characterized by surfaces of more than 1000 m(2)/g, are discussed in this paper. By adapting the synthesis parameters, such as type of silicium source, type of template, pH, temperature, em leader different materials can be synthesized with varying porosity and crystallinity. Besides the synthesis, much attention is focused on the activation of their surfaces by incorporation methods or deposition processes towards catalytic applications. Finally, the stability of the different materials, one of the critical parameters to potential industrial applications, is compared and evaluated. [ Last edited by zhaokelun1975 on 2007-4-27 at 00:46 ] |
9楼2007-04-27 00:45:24
★ ★
604gq(金币+2):赵东元最近的这篇讲有机官能化介孔也是不错滴。3X
604gq(金币+2):赵东元最近的这篇讲有机官能化介孔也是不错滴。3X
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Organic groups functionalised mesoporous silicates Title: Organic groups functionalised mesoporous silicates Author: Ying Wan, Dieqing Zhang, Na Hao, Dongyuan Zhao Email author(s) Address: Department of Chemistry, Shanghai Normal University, Shanghai 200234, P.R. China; Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P.R. China. ' Department of Chemistry, Shanghai Normal University, Shanghai 200234, P.R. China. ' Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P.R. China. ' Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P.R. China; Laboratory of Macromolecular Science, Fudan University, Shanghai 200433, P.R. China Journal:International Journal of Nanotechnology 2007 - Vol. 4, No.1/2 pp. 66 - 99 Abstract: Great interests have been imparted on organically modified mesoporous silica materials due to their high surface areas, uniform pore sizes and integrated functionality. Besides the inherent character of inorganic and organic components, the interactions between them should also be recognised for the synthesis, including organic-group loading, mesostructure and particle morphology, condensation, as well as organic-group distribution. To obtain long range ordered hybrid materials, several factors, such as relative hydrolysis and condensation rates of the inorganic and organic sources, chemical character such as hydrophobicity/hydrophilicity and acid/base of organic ligand as well as the surfactant category, should be surveyed. A concept of 'combinatorial synthesis' is introduced here for the cases of combining two or more functional units in a typical synthesis into a single one. The silica precursors in the preparation of periodic mesoporous organosilanes (PMOs) are the aggregation of inorganic and organic silicates. The assembly will lead to a unique distribution and high concentration of functional groups. Both the confinement within the mesopores and the pore surface nature will affect the accessibility to the active sites, and therefore, the adsorption and relative applications. These characters win them ample host-guest chemistry. They can seek the opportunities in the fields of catalysis, separation, electronic devices, biomedicines, nanomaterial fabrication, etc. eywords: synthesis; mesoporous silica; organic groups; functionalisation; self-assembly; templating; nanotechnology; periodic mesoporous organosilanes; silica mesostructures; hybrid organic-inorganic mesoporous materials. DOI: 10.1504/IJNT.2007.012316 |
10楼2007-04-27 00:53:40
11楼2007-04-27 01:13:14
12楼2007-04-27 09:04:18
13楼2007-04-27 11:45:29
★
popsheng(金币+1):不要这么悲观，低潮期预示着未来高峰期的出现
popsheng(金币+1):不要这么悲观，低潮期预示着未来高峰期的出现
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溶胶－凝胶制备si02，最近在做！！ 还没出成果，楼主发点资料给我看看啊！wanwei_366@tom.com 另外对介孔的前途感觉有点暗淡！！  |
14楼2007-04-27 12:09:41
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介孔自92年发起，至今已有15年。因为沸石分子筛在催化方面掀起了一次革命，使催化达到前所未有的高度。但是它的孔径受限在2nm以下。这使得沸石分子筛无法在长链分子（比如高炭醇）中得到应用。因而摆脱孔径的制约，势在必行。在这样的背景下，Mobil公司制备出了孔径大于2nm且在2-50nm范围可调的介孔分子筛。然而，这实现了孔径的扩大和可调，但是牺牲了孔壁的晶形－－－－沸石分子筛的孔壁是结晶的，但是介孔分子筛（特指二氧化硅类，其它类这个结论不成立）的孔壁是无定型的。从而，介孔的热稳定性和水热稳定性都很难让人满意。这也是介孔在应用中的最大瓶颈。 但是，介孔作为吸附载体，可以吸附废气废水中的杂质，可以作蛋白质酶、药物的载体，还可以作色谱填充。这些对介孔的热稳定性和水热稳定性要求并不高，从而很好的扬长避短。使得介孔材料仍有很大的发展空间，且在材料领域占据重要地位。 如果说介孔在走下坡路，这是不可以否认的，就好像当初的超导热，全世界都热火朝天，然后冷却。 [ Last edited by 604gq on 2007-4-27 at 20:11 ] |
15楼2007-04-27 14:45:42
16楼2007-04-27 17:21:32
★ ★
popsheng(金币+0):也是资深的兄弟了
popsheng(金币+2,VIP+0):zhao老大好久不见
popsheng(金币+0):也是资深的兄弟了
popsheng(金币+2,VIP+0):zhao老大好久不见
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NANOPOROUS MATERIALS: SCIENCE AND ENGINEERING edited by G Q Lu (University of Queensland, Australia) & X S Zhao (National University of Singapore, Singapore) Porous materials are of scientific and technological importance because of the presence of voids of controllable dimensions at the atomic, molecular, and nanometer scales, enabling them to discriminate and interact with molecules and clusters. Interestingly the big deal about this class of materials is about the 搉othingness?within ?the pore space. International Union of Pure and Applied Chemistry (IUPAC) classifies porous materials into three categories ?micropores of less than 2 nm in diameter, mesopores between 2 and 50 nm, and macropores of greater than 50 nm. In this book, nanoporous materials are defined as those porous materials with pore diameters less than 100 nm. Over the last decade, there has been an ever increasing interest and research effort in the synthesis, characterization, functionalization, molecular modeling and design of nanoporous materials. The main challenges in research include the fundamental understanding of structure-property relations and tailor-design of nanostructures for specific properties and applications. Research efforts in this field have been driven by the rapid growing emerging applications such as biosensor, drug delivery, gas separation, energy storage and fuel cell technology, nanocatalysis and photonics. These applications offer exciting new opportunities for scientists to develop new strategies and techniques for the synthesis and applications of these materials. This book provides a series of systematic reviews of the recent developments in nanoporous materials. It covers the following topics: (1) synthesis, processing, characterization and property evaluation; (2) functionalization by physical and/or chemical treatments; (3) experimental and computational studies on fundamental properties, such as catalytic effects, transport and adsorption, molecular sieving and biosorption; (4) applications, including photonic devices, catalysis, environmental pollution control, biological molecules separation and isolation, sensors, membranes, hydrogen and energy storage, etc. Contents: Nanoporous Materials ?An Overview (G Q Lu & X S Zhao) Advances in Mesoporous Materials Templated by Nonionic Block Copolymers (C Yu et al.) Zeolite/Mesoporous Molecular Sieve Composite Materials (D T On & S Kaliaguine) Chromium-Containing Ordered Nanoporous Materials (P Selvam) Surfactant-Templated Mesostructured Materials: Synthesis and Compositional Control (M S Wong & W V Knowles) Organic Host-Guest Structures in the Solid State (A Nangia) Nonsurfactant Route to Nanoporous Phenyl-Modified Hybrid Silica Materials (Y Wei et al.) 3D Macroporous Photonic Materials Templated by Self Assembled Colloidal Spheres (Z C Zhou & X S Zhao) Hydrophobic Microporous Silica Membranes for Gas Separation and Membrane Reactors (S Giessler et al.) Synthesis and Characterization of Carbon Nanotubes for Hydrogen Storage (H-M Cheng et al.) Physical Adsorption Characterization of Ordered and Amorphous Mesoporous Materials (M Thommes) Molecular Simulation of Adsorption in Porous Materials (D Nicholson) Surface Functionalization of Ordered Nanoporous Silicates (X S Zhao et al.) Surface Alumination of Mesoporous Silicates (R Mokaya) Acidity Measurement of Nanoporous Aluminosilicates ?Zeolites and MCM-41 (J Zheng et al.) Nanocatalysts Prepared by the Molecularly Designed Dispersion Process (P Cool et al.) Acidity-enhanced Nanoporous Catalytic Materials (F-S Xiao & Y Han) Modified Mesoporous Materials as Acid and Base Catalysts (D J Macquarrie) Lewis Acid/Base Catalysts Supported on Nanoporous Silica as Environmental Catalysts (V R Choudhary & B S Uphade) Nanoporous Catalysts for Shape-Selective Synthesis of Specialty Chemicals: A Review of Synthesis of 4,4?Dialkylbiphenyl (J-P Shen & C Song) Catalysis Involving Mesoporous Molecular Sieves (W S Ahn et al.) Adsorption and Transport in Nanoporous Materials (J P B Mota) Adsorption of Organic Molecules in Nanoporous Adsorbents from Aqueous Solution (R Denoyel) Functionalized Nanoporous Adsorbents for Environmental Remediation (M C Burleigh & S Dai) Nanoporous Adsorbents for Air Pollutant Removal (P Le Cloirrec) Bioadsorption and Separation with Nanoporous Materials (A Daehler et al.) Nanoporous Materials as Supports for Enzyme Immobilization (H H P Yiu & P A Wright) A Novel Non-surfactant Route to Nanoporous Materials and its Biological Applications (Y Wei & K-Y Qiu) Download link http://rapidshare.com/files/18399157/NANMAT.rar pass: tFNANMAT.rar http://rapidshare.com/files/18398393/NANOMATS.rar pass: tFNANOMATS.rar |
17楼2007-04-27 17:29:52
★ ★ ★ ★
popsheng(金币+4):严重支持！
popsheng(金币+4):严重支持！
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Mesoporous templated silicates: an overview of their synthesis, catalytic activation and evaluation of the stability. Adv Colloid Interface Sci. 2003 Apr 25;103(2):121-47. color] Linssen T, Cassiers K, Cool P, Vansant EF. Laboratory of Adsorption and Catalysis, Department of Chemistry, Universiteitsplein 1, B-2610 Wilrijk, Belgium. thierry.linssen@ua.ac.be The most recent developments in the formation of new mesoporous templated zeolitic materials, characterized by surfaces of more than 1000 m(2)/g, are discussed in this paper. By adapting the synthesis parameters, such as type of silicium source, type of template, pH, temperature, em leader different materials can be synthesized with varying porosity and crystallinity. Besides the synthesis, much attention is focused on the activation of their surfaces by incorporation methods or deposition processes towards catalytic applications. Finally, the stability of the different materials, one of the critical parameters to potential industrial applications, is compared and evaluated. Contents 1. 1.Introduction: state of the art 2. Synthesis 2.1.1. M41S materials 2.1.2. Alternative pathways to mesoporous templated silicates 2.2. Materials derived from clay structures 2.2.1. Folded sheet materials 2.2.2. Porous clay heterostructures 3. Stability of mesoporous templated silicates 4. Surface modification and activation of mesoporous materials 4.1. Modification of mesoporous silicas by incorporation of heteroelements in the framework 4.1.1. Acid catalysis 4.1.2. Redox catalysis 4.2. Activation by modification of the MTS surfaces 5. Conclusions 6. Acknowledgements 7. References http://www.box.net/public/c6hviyxo6s [ Last edited by zhaokelun1975 on 2007-4-27 at 17:38 ] |
18楼2007-04-27 17:33:25
19楼2007-04-27 18:12:07
22楼2007-04-27 21:37:49
24楼2007-04-27 23:22:58
25楼2007-04-27 23:27:13
26楼2007-04-28 08:55:13
★ ★ ★ ★
604gq(金币+2):先制备磁性纳米棒，然后通过层层自组装（LBL）在其表面包裹多层电解质，此复合材料作为智能药物载体，很有新意。 3X
popsheng(金币+2):谢谢积极参与
604gq(金币+2):先制备磁性纳米棒，然后通过层层自组装（LBL）在其表面包裹多层电解质，此复合材料作为智能药物载体，很有新意。 3X
popsheng(金币+2):谢谢积极参与
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Porous Iron Oxide Based Nanorods Developed as Delivery Nanocapsules Chemistry - A European Journal Volume 13, Issue 14 , Pages 3878 - 3885 Ping-Ching Wu 1, Wen-Shiuan Wang 2, Ying-Ting Huang 2, Hwo-Shuenn Sheu, Dr. 3, Yi-Wei Lo 2, Tsung-Lin Tsai 1, Dar-Bin Shieh, Prof. 4 *, Chen-Sheng Yeh, Prof. 2 * 1Institute of Basic Medical Sciences, National Cheng Kung University, Tainan 701, Taiwan 2Department of Chemistry and Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan 701, Taiwan National Cheng Kung University, Taiwan 3National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan 4Institute of Oral Medicine and Department of Stomatology and Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan 701, Taiwan, Fax: (+886)-6-274-0552 email: Dar-Bin Shieh (dshieh@mail.ncku.edu.tw) Chen-Sheng Yeh (csyeh@mail.ncku.edu.tw) *Correspondence to Dar-Bin Shieh, 4Institute of Oral Medicine and Department of Stomatology and Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan 701, Taiwan, Fax: (+886)-6-274-0552 *Correspondence to Chen-Sheng Yeh, 2Department of Chemistry and Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan 701, Taiwan National Cheng Kung University, Taiwan Funded by: National Science Council of Taiwan Keywords cellular uptake ?drug delivery ?iron ?nanorods ?polyelectrolytes Abstract A low-temperature solution approach (90-95 癈) using FeCl3 and urea was carried out to synthesize -FeOOH nanorods in aqueous solution. The as-synthesized -FeOOH nanorods were further calcined at 300 癈 to form porous nanorods with compositions including both -FeOOH and -Fe2O3. The derived porous nanorods were engineered to assemble with four layers of polyelectrolytes (polyacrylic acid (PAA)/polyethylenimine(PEI)/PAA/PEI) on their surfaces as polyelectrolyte multilayer nanocapsules. Fluorescein isothiocyanate (FITC) molecules were loaded into the polyelectrolyte multilayer nanocapsules in order to investigate drug release and intracellular delivery in Hela cells. The as-prepared nanocapsules showed ionic strength-dependent control of the permeability of the polyelectrolyte shells. The release behavior of the entrapped FITC from the FITC-loaded nanocapsules exhibited either controlled- or sustained-release trends, depending on the compactness of the polyelectrolyte shells on the nanorod surfaces. Cytotoxicity measurements demonstrate that the native nanorods and the polymer-coated nanorods have excellent biocompatibility in all dosages between 0.1 ng mL-1 and 100 gm L-1. The time dependence of uptake of FITC-loaded nanocapsules by Hela cancer cells observed by laser confocal microscopy indicates that the nanocapsules can readily be taken up by cancer cells in 15 min, a relatively short period of time, while the slow release of the FITC from the initial perimembrane space into the cytoplasm was followed by release into the nucleus after 24 h. [ Last edited by zhaokelun1975 on 2007-4-28 at 09:37 ] |
27楼2007-04-28 09:35:42
28楼2007-04-28 11:43:35
几个介孔相关的PPT
★ ★ ★
popsheng(金币+3,VIP+0):3x
popsheng(金币+3,VIP+0):3x
29楼2007-04-28 15:47:53
31楼2007-04-28 16:11:51
popsheng(金币+0):听轶事，霍好像专科出身，但是做实验时候一张小床就在实验室里，后来才做得惊天动地
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是徐如人院士和庞文琴合著的那本新书吗？ 这是本难得的好书！ 第九章是 介孔材料 由牛人 霍启升编写。 我也想要电子版，能发一份给我吗？huaxuegq@sina.com。 |
32楼2007-04-28 16:21:53
★ ★ ★
604gq(金币+2):纳米牛人杨培东和介孔牛人赵东元1998年在G. D. Stucky组所作的工作，是非硅介孔材料的一次里程。3x。五一快乐！
popsheng(金币+1):3x
604gq(金币+2):纳米牛人杨培东和介孔牛人赵东元1998年在G. D. Stucky组所作的工作，是非硅介孔材料的一次里程。3x。五一快乐！
popsheng(金币+1):3x
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前面各位大侠的主要视线都集中在介孔硅（Mesoporous Silica），那么我就来篇Nature上的关于mesoporous metal oxides 的文章。^_^ Title：Generalized syntheses of large-pore mesoporous metal oxides with semicrystalline frameworks Authors：Peidong Yang, Dongyuan Zhao, David I. Margolese,Bradley F. Chmelka& Galen D. Stucky VOL 396，Page152 Abstract: Surfactants have been shown to organize silica into a variety of mesoporous forms, through the mediation of electrostatic, hydrogen-bonding, covalent and van der Waals interactions(1-8). This approach to mesostructured materials has been extended, with sporadic success, to non-silica oxides(5-17), which might promise applications involving electron transfer or magnetic interactions. Here we report a simple and versatile procedure for the synthesis of thermally stable, ordered, large-pore (up to 140 Angstrom) mesoporous metal oxides, including TiO2, ZrO2, Al2O3, Nb2O5, Ta2O5, WO3, HfO2, SnO2, and mixed oxides SiAlO3.5, SiTiO4, ZrTiO4, Al2TiO5 and ZrW2O8. We used amphiphilic poly(alkylene oxide) block copolymers as structure-directing agents in non-aqueous solutions for organizing the network-forming metal-oxide species, for which inorganic salts serve as precursors. Whereas the pore walls of surfactant-templated mesoporous silica(1) are amorphous, our mesoporous oxides contain nanocrystalline domains within relatively thick amorphous walls. We believe that these materials are formed through a mechanism that combines block copolymer self-assembly with complexation of the inorganic species. |
33楼2007-04-30 23:31:03
34楼2007-05-04 14:57:53
temedx
专家顾问 (著名写手)
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专家经验: +41 - MN-EPI: 8
- 应助: 243 (大学生)
- 贵宾: 1.156
- 金币: 11823.5
- 帖子: 2543
- 在线: 475.9小时
- 虫号: 297942
推荐一篇综述
★ ★
604gq(金币+2):3X。节日快乐。
604gq(金币+2):3X。节日快乐。
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Structural Elucidation of Microporous and Mesoporous Catalysts and Molecular Sieves by High-Resolution Electron Microscopy JOHN MEURIG THOMAS, OSAMU TERASAKI, PRATIBHA L. GAI, WUZONG ZHOU,AND JOSE GONZALEZ-CALBET Acc. Chem. Res. 2001, 34, 583-594 ABSTRACT Twenty years ago, one of us embarked (Bursill, L. A.; Lodge, E. A.; Thomas, J. M. Zeolitic structures as revealed by high-resolution electron microscopy. Nature 1980, 286, 111-113) on the study of zeolites (renowned for their electron-beam sensitivity) by highresolution transmission electron microscopy (HRTEM). In the ensuing years, high-resolution imaging aided by optical diffractometry has yielded details of the open framework structures of anumber of new aluminosilicate and aluminophosphate molecular sieves and catalysts. The nature of intergrowth and recurrently twinned structures, as well as new types of structural imperfection in hitherto uncharacterized materials, has also been elucidated. With continued improvements in instrumental development, encompassing higher accelerating voltages, better objective lenses and vacua, computational advances, and the arrival of slow-scan CCD detectors, electron crystallographic methods and HRTEM imaging now enable the ab initio three-dimensional structures of micro- and mesoporous solids, with their occluded structuredirecting organic species, to be determined. High-resolution scanning transmission electron microscopy using subnanometric probes provides supplementary structural and ltramicro analytical information and electron spectroscopic imaging (at the attogram level). In its high-angle annular dark-field mode, it is capable of locating and determining the composition of individual nanoparticle catalysts (consisting of just a few atoms) supported on porous hosts. [ Last edited by temedx on 2007-5-4 at 19:30 ] |
35楼2007-05-04 19:13:32
36楼2007-05-07 13:20:30
37楼2007-05-07 13:22:43
★
popsheng(金币+1,VIP+0):哈哈，原来是马儿哥啊
popsheng(金币+1,VIP+0):哈哈，原来是马儿哥啊
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实事求是的说,这个帖子不错.纳米版面应该多做这样的帖子.大家多讨论多交流,才有广度和深度. "听轶事，霍好像专科出身，但是做实验时候一张小床就在实验室里，后来才做得惊天动地"我也听硕士老板说过.还说他做了N个博士后,后来成为首席科学家. 仔细的看了所有的回帖,想弱弱的问下,介孔合成以及应用以后的大概方向是那些?主要问题在那些方面?感觉介孔氧化硅的地位还是很大.非硅包括金属氧化物,复合氧化物,以及金属在这方面的前景怎么样?有没有其他一种物质能够撼动氧化硅的热度?合成机制上仍然有许多需要探索的地方.在表面活性剂,嵌段聚合物以后那一个是新的合成介孔的热点? |
38楼2007-05-07 19:19:38
39楼2007-05-09 11:19:17
40楼2007-05-09 12:24:34
★ ★ ★
604gq(金币+0):A. Vinu写的这篇有关生物分子（包括蛋白质，氨基酸等）在介孔分子筛孔道内的负载的综述，比较好。谢谢提供
popsheng(金币+3,VIP+0):zhao老大好久不见
604gq(金币+0):A. Vinu写的这篇有关生物分子（包括蛋白质，氨基酸等）在介孔分子筛孔道内的负载的综述，比较好。谢谢提供
popsheng(金币+3,VIP+0):zhao老大好久不见
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Assemblies of Biomaterials in Mesoporous Media Journal of Nanoscience and Nanotechnology Vol.6, 1510–1532, 2006 Ajayan Vinu1 ∗, Masahiko Miyahara2, and Katsuhiko Ariga2 1Nano Ionic Materials Group, Fuel Cell Materials Center, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan 2Supermolecules Group, Nano Ionic Materials Group, Fuel Cell Materials Center, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan Assemblies of biomaterials onto mechanically stable inorganic structure are advantageous for the practical applications because of the potential to improve the stability and performance of biomaterials in the biocatalytic processes. Among many kinds of inorganic materials, mesoporous materials such as mesoporous silica and mesoporous carbon have attracted special attention owing to their well-defined structures and perfectly controlled pore geometries, which would lead to unique functions such as size selective adsorption of biomaterials. In the first part of this review, adsorption behaviors of proteins, enzymes, vitamins, and amino acids in aqueous solutions onto mesoporous media are systematically explained. Pore geometries (pore diameter and volume) of mesoporous materials are the crucial factors for the size selective adsorption of biomaterials, especially proteins, which often have a size comparable to pore dimension. The studies on the adsorption of biomaterials on the mesoporous carbon reveal that hydrophobic interaction between guest molecules and surface of the mesoporous materials is an important parameter which controls the amount of biomaterials adsorption. Enhanced adsorption of biomaterials was commonly observed at their isoelectric point, where electrostatic repulsion is minimized between the biomaterials. In addition, several functions such as biomolecular separation, reactor function, controlled drug release, and photochemical properties are discussed in the latter sections. Studies on assemblies of biomaterials in mesoporous media are still in initial stage, but the development of appropriately designed mesoporous materials would powerfully promote researches in these fascinating unexplored fields. Keywords: Mesoporous Silica, Mesoporous Carbon, Proteins, Amino Acids, Vitamins, Peptides,Adsorption, Drug Release, Photochemistry. |
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604gq(金币+1):齐利民组主要工作不是介孔噢，呵呵，做中空球倒是做的不错。
604gq(金币+1):齐利民组主要工作不是介孔噢，呵呵，做中空球倒是做的不错。
| 北京大学齐利民研究组 www.chem.pku.edu.cn/qilm www.small.org.cn主要作介孔二氧化硅形貌控制 |
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tangsd24楼
2007-04-26 18:43
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支持！ 
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2007-04-27 21:08
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2007-04-27 22:05
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