A facile and general fabrication method for organic silica hollow spheres and their excellent adsorption properties for heavy metal ions
A facile and general fabrication method for organic silica hollow spheres and their excellent adsorption properties for heavy metal ions
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一种简便通用的有机二氧化硅空心球的制备方法及其对重金属离子的优异吸附性能
DOI：
10.1039/c4ta03856h
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发表时间：
2014-01-01
影响因子：
11.9
通讯作者：
Wu, Limin
中科院分区：
文献类型：
--
作者：
Hu, Jing;Wang, Xuge;Wu, Limin
本文介绍了一种在氨水催化下，正硅酸乙酯与其它硅烷偶联剂共水解缩合制备有机硅空心球的简便、通用的方法。首先将硅烷偶联剂预水解以形成胶束。当加入TEOS时，TEOS与胶束表面的Si-OH和甲氧基之间发生溶胶-凝胶反应，形成多孔二氧化硅壳，产生有机二氧化硅空心球。以乙烯基二氧化硅空心球为例，所得空心球对Pb 2+等重金属离子表现出相当高的吸附性能。
This paper presents a facile and general method for fabrication of organic silica hollow spheres by co-hydrolysis and condensation reactions of TEOS and other silane coupling agents under the catalysis of ammonia. Silane coupling agents were first pre-hydrolyzed to form micelles. When TEOS was added, a sol–gel reaction takes place between TEOS and the Si–OH and methoxy groups, at the surfaces of the micelles to form porous silica shells, producing organic silica hollow spheres. Taking vinyl silica hollow spheres as an example, the as-obtained hollow spheres exhibited considerably high adsorption properties for Pb2+ and other heavy metal ions.