24小时热门版块排行榜    

查看: 842  |  回复: 3

浮躁的很

铜虫 (小有名气)

[求助] 球形介孔二氧化硅的制备通常用什么做模板已有2人参与

小弟想做出不同孔径大小的介孔二氧化硅,可以用溶剂溶掉的,不能煅烧,请问各位大神用什么做模板好呢
回复此楼

» 猜你喜欢

» 本主题相关价值贴推荐,对您同样有帮助:

已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

zhangkun232

至尊木虫 (著名写手)

【答案】应助回帖

★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
感谢参与,应助指数 +1
浮躁的很: 金币+15, ★★★很有帮助 2015-11-07 09:45:47
Facile Large-Scale Synthesis of Monodisperse Mesoporous Silica Nanospheres with Tunable Pore Structure
Mesoporous silica nanoparticles (MSNs) are experiencing rapid development in the biomedical field for imaging and for use in heterogeneous catalysis. Although the synthesis of MSNs with various morphologies and particle sizes has been reported, synthesis of a pore network with monodispersion control below 200 nm is still challenging. We achieved this goal using mild conditions. The reaction occurred at atmospheric pressure with a templating sol–gel technique using cetyltrimethylammonium (CTA+) as the templating surfactant and small organic amines (SOAs) as the mineralizing agent. Production of small pore sizes was performed for the first time, using pure and redispersible monodispersed porous nanophases with either stellate (ST) or raspberry-like (RB) channel morphologies. Tosylate (Tos–) counterions favored ST and bromide (Br–) RB morphologies at ultralow SOA concentrations. Both anions yielded a worm-like (WO) morphology at high SOA concentrations. A three-step formation mechanism based on self-assembly and ion competition at the electrical palisade of micelles is proposed. Facile recovery and redispersion using specific SOAs allowed a high yield production at the kilogram scale. This novel technique has practical applications in industry.

介孔二氧化硅纳米颗粒的合成实现了重要突破,不仅解决了MSNs规模化制备的难题,率先实现了介孔二氧化硅纳米颗粒公斤级合成,而且可以实现颗粒内部孔道结构的有效调变,如 发散状、蠕虫状等。另外,作者系统研究了介孔二氧化硅纳米颗粒的合成机理,很值得一读。

http://pubs.acs.org/doi/abs/10.1021/ja3116873
Fig.1-07-11-2012.jpg
简简单单生活,快快乐乐追求自己的梦想!
2楼2015-10-30 19:09:33
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

biyanping

新虫 (初入文坛)

【答案】应助回帖

★ ★ ★ ★ ★
感谢参与,应助指数 +1
浮躁的很: 金币+5, 有帮助 2015-11-07 09:46:06
最常用的就是阳离子表面活性剂:类似于十六烷基三甲基溴化铵
3楼2015-10-31 09:11:40
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

浮躁的很

铜虫 (小有名气)

引用回帖:
3楼: Originally posted by biyanping at 2015-10-31 05:11:40
最常用的就是阳离子表面活性剂:类似于十六烷基三甲基溴化铵

的确很多用到了CTAB,貌似现在都是用的双模板,就用CTAB好了,做简单点的
4楼2015-11-07 09:47:30
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
相关版块跳转 我要订阅楼主 浮躁的很 的主题更新
信息提示
请填处理意见