教師資料查詢 | 類別: 期刊論文 | 教師: 張經霖 CHANG, HENRY CHING-LIN (瀏覽個人網頁)

標題:A Self-Templated Route to Hollow Silica Microspheres
學年
學期
出版(發表)日期2009/02/01
作品名稱A Self-Templated Route to Hollow Silica Microspheres
作品名稱(其他語言)
著者Zhang, Tierui; Zhang, Qiao; Ge, Jianping; Goebl, James; Sun, Min-wei; Yan, Yushan; Liu, Yi-sheng; 張經霖; Chang, Ching-lin; Guo, Jinghua; Yin, Yadong
單位淡江大學物理學系
出版者American Chemical Society (ACS)
著錄名稱、卷期、頁數Journal of Physical Chemistry C 113(8), pp.3168-3175
摘要A simple, mild, and effective self-templated approach has been developed to directly convert solid SiO2 microspheres into hollow structures. The reaction involves initial partial dissolution of silica cores in a NaBH4 solution and subsequent shell formation due to the redeposition of the silicate species back onto the colloid surfaces. The increasing concentration of NaBO2 as the result of the slow decomposition of NaBH4 in water is found to be responsible for the regrowth of the silica shell. This method allows the production of hollow silica spheres with sizes ranging from 70 nanometers to several micrometers, largely determined by the size of the starting silica colloids. The solid-to-hollow transformation mechanism is investigated in detail by transmission electron microscopy (TEM), scanning electron microscopy (SEM), Fourier Transform Infrared (FTIR) spectrometry, X-ray absorption spectroscopy (XAS), N2 adsorption−desorption, and X-ray diffraction (XRD). We also study the reaction conditions that allow control over the wall thickness, surface morphology, and shell porosity.
關鍵字
語言英文
ISSN1932-7447
期刊性質國內
收錄於
產學合作
通訊作者
審稿制度
國別中華民國
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