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论文类型：期刊论文

发表时间：2009-02-04

发表刊物：MATERIALS RESEARCH BULLETIN

收录刊物：SCIE、EI

卷号：44

期号：2

页面范围：280-283

ISSN号：0025-5408

关键字：Oxides; Surfaces; Chemical synthesis; Surface properties

摘要：Silica microcapsules (hollow spheres) were synthesized successfully by a novel CTAB-stabilized water/oil emulsion system mediated hydrothermal method. The addition of urea to a solution of aqueous phase was an essential step of the simple synthetic procedure of silica hollow spheres, which leads to the formation of silica hollow spheres with smooth shell during hydrothermal process. The intact hollow spheres were obtained by washing the as-synthesized solid products with distilled water to remove the organic components. A large amount of silanol groups were retained in the hollow spheres by this facile route without calcination. The morphologies and optical properties of the product were characterized by transmission electron microscopy, scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy. Furthermore, on the basis of a series of SEM observations, phenomenological elucidation of a mechanism for the growth of the silica hollow spheres has been presented. (C) 2008 Elsevier Ltd. All rights reserved.