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浮躁的很铜虫 (小有名气)
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[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
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| 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 |
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zhangkun232
至尊木虫 (著名写手)
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浮躁的很: 金币+15, ★★★很有帮助 2015-11-07 09:45:47
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浮躁的很: 金币+15, ★★★很有帮助 2015-11-07 09:45:47
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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 |
2楼2015-10-30 19:09:33
3楼2015-10-31 09:11:40
浮躁的很
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4楼2015-11-07 09:47:30
