Nanostructure of TiO2 nano-coated SiO2 particles
Nanostructure of TiO2 nano-coated SiO2 particles
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DOI：
10.1111/j.1551-2916.2005.00583.x
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发表时间：
2005-11-01
影响因子：
3.9
通讯作者：
Tanaka, J
中科院分区：
文献类型：
--
作者：
Fujimoto, M;Ohno, T;Tanaka, J
我们用高分辨率透射显微镜对溶胶-凝胶法制备的SiO2-TiO2纳米杂化颗粒进行了表征。在单分散的SiO2纳米颗粒表面可以观察到一些纳米有序的TiO2锐钛矿晶体。TiO2锐钛矿晶体的量子尺寸效应归因于吸收带的蓝移。SiO2-TiO2纳米杂化颗粒的粗糙表面来源于TiO2锐钛矿晶体发育的生长平面，该晶体由完全水解的钛醇酸盐生长而成，在600℃的热处理过程中，钛醇酸盐在结晶过程中没有与乙酸发生反应。
We characterized SiO2-TiO2 nano-hybrid particles, prepared using the sol-gel method, using high-resolution transmission microscopy. A few nanometer-ordered TiO2 anatase crystallites could be observed on the monodispersed SiO2 nanoparticle surface. The quantum size effect of the TiO2 anatase crystallites is attributed to the blue shift of the absorption band. The rough surface of the SiO2-TiO2 nano-hybrid particles was derived from the developed growth planes of the TiO2 anatase crystallites, grown from fully hydrolyzed Ti alkoxide that did not react with acetic acid during the crystallization process at 600 degrees C thermal annealing.