Preparation, characterization and photocatalytic activity of N-doped TiO_2 nanocrystals

作     者：Hong-tao Gao Jing Zhou Dong-mei Dai Guang-jun Liu 

作者机构：College of Chemistry and Molecular Engineering Qingdao University of Science ＆ Technology Qingdao 266042 China Department of Chemistry Jining University Jining 273155 China 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2009年第16卷第6期

页      面：701-706页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the Outstanding Adult-Young Scientific Research Encouraging Foundation of Shandong Province (No.2008BS09016) the Nature Science Foundation of Shandong Province (No.Y2007B15) the Scientific Research Program of Shandong Province Education Department, China (No.J06D55) 

主　　题：pbotocatalyst degradation nitrogen doping TiO2 nanocrystals visible light crystal violet 

摘      要：N-doped TiO2 nanocrystals were prepared using titanium alkoxide as precipitant with different proportional materials. The products were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and UV-vis diffuse reflectance spectra. It is confirmed experimentally that the photocatalytic activity of N-doped TiO2 is much higher than that of Degussa P25, when used for the degradation of crystal violet. The degradation kinetics follows an apparent first-order reaction, which is consistent with a generally observed Langmuir-Hinshelwood mechanism. The doping of TiO2 with nitrogen significantly increases the absorption in the region of visible light. The energy of the band gap of N-doped TiO2 is 2.92 eV. The better performance of N-doped TiO2 can be explained by the fact that it is also excited with longer-wavelength light.