Microstructure and photocatalytic activity of titanium dioxide nanoparticles

doi:10.1088/1674-1056/21/9/098102

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.

Keywords: titanium dioxide nanoparticles high-resolution transmission electron microscopy photocatalytic activity

Received: 13 January 2012
Revised: 16 March 2012
Accepted manuscript online:

PACS:	81.07.Bc	(Nanocrystalline materials)
	68.37.Og	(High-resolution transmission electron microscopy (HRTEM))
	84.60.Jt	(Photoelectric conversion)

Fund: Project supported by the National Basic Research Program of China (Grant No. 2012CB722705), the Shandong Provincial Natural Science Foundation for Outstanding Young Scientists, China (Grant No. JQ201002), and the Shandong Provincial Scientific Research Award for Outstanding Young and Middle-Aged Scientists, China (Grant No. BS2009CL0005).

Corresponding Authors: Wang Yi-Qian
E-mail: yqwang@qdu.edu.cn

Cite this article:

Li Chun-Yan (李春艳), Wang Jiang-Bin (王江彬), Wang Yi-Qian (王乙潜) Microstructure and photocatalytic activity of titanium dioxide nanoparticles 2012 Chin. Phys. B 21 098102

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