Microstructure and photocatalytic activity of titanium dioxide nanoparticles

被引：11
作者：
Li Chun-Yan [1 ]
Wang Jiang-Bin [2 ]
Wang Yi-Qian [1 ]
机构：
[1] Qingdao Univ, Cultivat Base State Key Lab, Qingdao 266071, Peoples R China
[2] Laiyang Zixilai Environm Protect Technol Co Ltd, N Toll Stn, Laiyang 265229, Peoples R China
来源：
CHINESE PHYSICS B | 2012年 / 21卷 / 09期
关键词：
titanium dioxide nanoparticles; high-resolution transmission electron microscopy; photocatalytic activity; SOL-GEL SYNTHESIS; TIO2; NANOPARTICLES; METHYL-ORANGE; DEGRADATION; ANATASE; RUTILE; NANOTUBE; WATER; SIZE;
D O I：
10.1088/1674-1056/21/9/098102
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Titanium dioxide nanoparticles with an average diameter of about 10 nm are fabricated using a sintering method. The degradation of methyl orange indicates that the photocatalytic efficiency is greatly enhanced, which is measured to be 62.81%. Transmission electron microscopy is used to investigate the microstructure of TiO2 nanoparticles in order to correlate their photocatalytic properties. High-resolution transmission electron microscopy examinations show that all the nanoparticles belong to the anatase phase, and pure edge dislocations exist in some nanoparticles. The great enhancement of photocatalytic efficiency is attributed to two factors, the quantum size effect and the surface defects in the nanoparticles.
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页数：5
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