Low temperature preparation and visible light photocatalytic activity of mesoporous carbon-doped crystalline TiO2
Low temperature preparation and visible light photocatalytic activity of mesoporous carbon-doped crystalline TiO2
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介孔碳掺杂晶态TiO2的低温制备及其可见光光催化活性
DOI：
10.1016/j.apcatb.2006.06.015
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发表时间：
2007-01-15
影响因子：
22.1
通讯作者：
Zou, Zhigang
中科院分区：
文献类型：
--
作者：
Ren, Wenjie;Ai, Zhihui;Zou, Zhigang
以葡萄糖为碳源，通过碳掺杂制备了一种可见光活性的二氧化钛光催化剂。与之前在高温下制备的碳掺杂二氧化钛不同，我们的制备是在低至160℃的温度下通过水热法进行的。通过X射线衍射（XRD）、X射线光电子能谱（XPS）、透射电子显微镜（TEM）、氮吸附以及紫外 - 可见漫反射光谱对所得光催化剂进行了表征。表征结果发现，该光催化剂具有约8nm的均匀孔径和126 m²/g的高比表面积。与未掺杂的二氧化钛相比，碳掺杂的二氧化钛在400 - 450nm范围内有明显的吸收，且带隙跃迁发生红移。研究发现，在可见光照射（λ> 420nm）下，所得碳掺杂二氧化钛对水中罗丹明B（RhB）的降解表现出比未掺杂的二氧化钛和德固赛P25显著更高的光催化活性。由于该方法简便且节能，它可以很容易地扩大规模用于工业生产可见光驱动的用于污染物去除的光催化剂。（c）2006爱思唯尔有限公司。版权所有。
A visible-light-active TiO2 photocatalyst was prepared through carbon doping by using glucose as carbon source. Different from the previous carbon-doped TiO2 prepared at high temperature, our preparation was performed by a hydrothermal method at temperature as low as 160 degrees C. The resulting photocatalyst was characterized by XRD, XPS, TEM, nitrogen adsorption, and UV-vis diffuse reflectance spectroscopy. The characterizations found that the photocatalyst possessed a homogeneous pore diameter about 8 nm and a high surface area of 126 m(2)/g. Comparing to undoped TiO2, the carbon-doped TiO2 showed obvious absorption in the 400-450 nm range with a red shift in the band gap transition. It was found that the resulting carbon-doped TiO2 exhibits significantly higher photocatalytic activity than the undoped counterpart and Degussa P25 on the degradation of rhodamine B (RhB) in water under visible light irradiation (lambda > 420 nm). This method can be easily scaled up for industrial production of visible-light driven photocatalyst for pollutants removal because of its convenience and energy-saving. (c) 2006 Elsevier B.V. All rights reserved.