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Investigation of Photocatalytic Activity of Nano-Sized TiO2 with the Presence of Various Inorganic Anions.

Zhang, Yun and Ji, Xiaobo and Li, Hong and Chen, Jianying and Wang, Yuan (2009) Investigation of Photocatalytic Activity of Nano-Sized TiO2 with the Presence of Various Inorganic Anions. Journal of Nanoscience and Nanotechnology, 9 (6). pp. 3639-3643. ISSN 1533-4880

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Abstract

The effect of various anions on the photocatalytic activity of nano-sized TiO2 was investigated in a methyl orange solution. The photocatalytic activity of the TiO2 nanoparticles was significantly affected in the presence of SO2−4, CO2−3, NO−3 and Cl−. Among the tested ions, Cl− was most effective anion in changing the photocatalytic activity. Addition of Cl− (0.05 M) decreased the methyl orange photodegradation rate to only one quarter of that when TiO2 was used alone. It was also demonstrated that the effects of these inions, on the rate of photocatalytic activity of the nanoparticles, were concentration dependent. There was a negative correlation between the concentrations of NO−3 and Cl− and the methyl orange degradation rate by TiO2. However, at low concentrations, CO2−3 and SO2−4 enhanced the photocatalytic activity; while at the higher concentrations, these two anions inhibited the photocatalytic activity of TiO2

Item Type: Article
Journal or Publication Title: Journal of Nanoscience and Nanotechnology
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 31613
Deposited By: Mrs Yaling Zhang
Deposited On: 28 Jan 2010 08:54
Refereed?: Yes
Published?: Published
Last Modified: 09 Apr 2014 20:31
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/31613

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