文献类型：期刊文献

英文题名：Facile fabrication of hollow mesoporous silica microspheres with hierarchical shell structure via a sol-gel process

作者：Shang, Qianqian[1] Zhou, Yonghong[1]

第一作者：尚倩倩

通信作者：Zhou, YH[1]

机构：[1]Chinese Acad Forest, Inst Chem Ind Forestry Prod, Nanjing 210042, Jiangsu, Peoples R China

年份：2015

卷号：75

期号：1

起止页码：206-214

外文期刊名：JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20151400711240);Scopus(收录号：2-s2.0-84929836416);WOS:【SCI-EXPANDED(收录号:WOS:000354961700022)】；

基金：The authors are grateful for the financial support by the Twelfth Five-Year National Science and Technology Support Program (Grant 2012BAD32B05).

语种：英文

外文关键词：Hierarchical; Hollow spheres; Template; Silica; Sol-gel

摘要：A facile method for the preparation of polystyrene/silica (PS/SiO2) composite microspheres via sol-gel process of tetraethylorthosilicate (TEOS) employing polyvinylpyrrolidone-functionalized monodispersed PS microspheres as template is proposed. Hollow mesoporous silica microspheres containing surface silica nanoparticles are successfully fabricated after the calcination of the composite microspheres. The shell thickness, the size of surface silica nanoparticles and the surface morphology of hollow mesoporous silica microspheres can be readily tailored by adjusting the concentrations of TEOS and ammonia (NH4OH). The formation mechanism of the products is detailed through the investigation of the products at different reaction conditions. At the low NH4OH/TEOS volume ratio (< 1), intact hollow mesoporous silica microspheres with hierarchical raspberry-like structure can be obtained. This synthesis method is simple, straightforward and suitable for the preparation of the other biomineral nanostructures that are unique carriers in drug delivery, biological and catalytic applications.