A facile method for preparing thiocyanato-functionalized porous silica nanospheres

作     者：Jie Li Lianxi Chen Xi Li Chaocan Zhang Zhenhui Liu 

作者机构：School of Chemistry Chemical Engineering and Life Science Wuhan University of Technology Wuhan 430070 China School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China 

出 版 物：《Particuology》 (颗粒学报（英文版）)

年 卷 期：2016年第14卷第1期

页      面：183-190页

核心收录：

学科分类：08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：financial support of the Nature Science Foundation of Hubei Province State Key Laboratory of Natural and Biomimetic Drugs 国家自然科学基金 financially supported by the Guangdong Well-SilicaSol Co., LTD, China 

主　　题：Thiocyanato Functionalization Silica nanospheres Porous Micellar template 

摘      要：In this study, we present a facile method to prepare thiocyanato-functionalized porous silica nanospheres. Thiocyanato functionalized silica shells were coated on positively charged cetyltrimethylammonium bromide （CTAB） micelles via hydrolysis and condensation of （3-thiocyanatopropyl）triethoxysilane （TCPTES）, the CTAB cores were removed subsequently to form thiocyanato-functionalized porous sil- ica nanospheres. We demonstrate that the contents of the thiocyanato groups within the functionalized porous silica nanosphere frameworks gradually diminished as a function ofhydrothermal treatment time at 100~C until complete removal, confirmed by TGA and FTIR spectra. The data indicate that extended operation at relatively elevated temperatures may lead to the decomposition of the thiocyanato functional groups. In addition, at a lower CTAB concentration （0.0009 M）, non-porous thiocyanato functionalized sil- ica nanospheres were formed. However, increasing the CrAB concentration to 0.01 M resulted in porous nanospheres inferring that a CTAB concentration threshold is needed to form thiocyanato-functionalized porous silica nanospheres.