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yy0421

银虫 (小有名气)

[求助] 石墨烯,石墨烯氧化物,氧化石墨烯,电化学还原石墨烯氧化物 晕了! 已有1人参与

石墨烯,石墨烯氧化物,氧化石墨烯,电化学还原石墨烯氧化物
各位搞纳米材料的大侠们,小女子已经被这几个石墨烯的东东搞晕掉了,求教各位给说说这几个东东的区别,多谢了!
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邓小

银虫 (正式写手)

引用回帖:
6楼: Originally posted by xiejf at 2013-03-18 22:32:38
大π键...

哦,这样啊!那明白了。今天用普通的石墨粉做氧化石墨烯,石墨的颗粒大小事<30um的,用的是1g石墨粉的量,现在刚好做到加完过氧化氢那一步,有金黄色的颗粒,也有部分黑色的颗粒。个人感觉,应该没有氧化完全,黑色颗粒密度大些,沉在最底部,上面有一层金黄色的颗粒,再上面是金黄色颗粒悬浮物。不知如何把未氧化的石墨粉给除去。
生无所息
7楼2013-03-19 12:21:23
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wulishi8

专家顾问 (知名作家)

【答案】应助回帖

感谢参与,应助指数 +1
石墨烯,可以认为是总称,也可以认为是由CVD或者机械剥离法直接制备的石墨材料的名称;石墨烯氧化物和氧化石墨烯应该是一样的,都是指利用化学方法制备的,带有氧化基团的石墨烯(GO);将氧化石墨烯利用各种方法还原之后得到的石墨烯,就称为还原氧化石墨烯(rGO),就应该是,你文中讲的电化学(方法)还原石墨烯氧化物。
中山大学材料学院招聘博士后和专职研究员,年薪20万起,请站内联系,谢谢。
2楼2012-12-14 20:22:56
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xiejf

专家顾问 (文学泰斗)

麦麦爸爸爱小牛

【答案】应助回帖

感谢参与,应助指数 +1
石墨烯是碳以sp2杂化形成的二维平面结构,
石墨烯氧化物,氧化石墨烯可以认为是一样的,是石墨烯的氧化产物,单层,有含氧基团,不过氧化石墨是多层的氧化石墨烯
电化学还原石墨烯氧化物是还原氧化石墨烯的一种制备方法的产物,含氧基团有所减少
麦麦爸爸爱小牛
3楼2012-12-14 20:36:33
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dengjfp

铁杆木虫 (著名写手)

【答案】应助回帖

感谢参与,应助指数 +1
建议看见这篇综述文献: Graphenes in chemical sensors and biosensors
Graphene    Exactly one layer of a polycyclic aromatic hydrocarbon network, with all carbon atoms hexagonally arranged in a planar condensed ring system. It has a metallic character and consists solely of carbon and hydrogen.
    Graphene oxide        Exactly one layer of a polycyclic hydrocarbon network, with all carbon atoms hexagonally arranged in a planar condensed ring system. It has various oxygen groups and is partially aromatic. It possesses a band gap greater than 1.5 eV. The band gap depends on its oxidation level. The C:O ratio is between 2 and 3.
    Reduced graphene oxide (rGO)  Exactly one layer of a polycyclic hydrocarbon network, with all carbon atoms hexagonally arranged in a planar condensed ring system. It has an oxygen fraction around or below 10%. It is mostly aromatic and resembles graphene in terms of electrical, thermal and mechanical properties.
   Graphite        “An allotropic form of the element carbon consisting of layers of hexagonally arranged carbon atoms in a planar condensed ring system. The layers are stacked parallel to each other in a three-dimensional crystalline long-range order. There are two allotropic forms with different stacking arrangements, hexagonal and rhombohedral. The chemical bonds within the layers are covalent with sp2 hybridization and with a C-C distance of 141.7 pm. The weak bonds between the layers are metallic with a strength comparable to van der Waals bonding only.”
    Graphite oxide        An heterogeneous material prepared by the oxidation of graphite. It can be described as an assembly of many layers of graphene oxide.
    We also note an exaggerated use of acronyms in the literature all referring to the same materials, with examples being CRGO, GO, RGO, GR, G, GNS, EG, GNP, CCG, GE, GP, ERGO, GF, EGO, GS, GN, TRGO, CMG, FG, ERGNO, CRGNO, and the like. This allows for a high risk of confusion (e.g. GO may stand for graphite oxide or graphene oxide). In our opinion the words “graphite” and “graphene” are short enough and do not require an acronym.
4楼2012-12-15 14:49:00
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