Microstructure and photocatalytic activity of titanium dioxide nanoparticles |
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| Authors: | Li Chun-Yan Wang Jiang-Bin Wang Yi-Qian |
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| Affiliation: | a The Cultivation Base for State Key Laboratory, Qingdao University, Qingdao 266071, China;b Laiyang Zixilai Environmental Protection Technology Co. Ltd., North of Toll Station, Laiyang 265229, China |
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| Abstract: | 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%. The transmission electron microscopy is used to investigate the microstructure of TiO2 nanoparticles in order to correlate with 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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| Keywords: | titanium dioxide nanoparticles high-resolution transmission electron microscopy photocatalytic activity |
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