TiO2 Thin Film with Varied Porous Structure Applied on the Degradation of Methylene Blue

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题名:	TiO2 Thin Film with Varied Porous Structure Applied on the Degradation of Methylene Blue
作者:	Wang, SH (Wang, Sheng-Hung) Wang, KH (Wang, Kuo-Hua) Jehng, JM (Jehng, Jih-Mirn)
贡献者:	Dept Labor Relat
关键词:	TiO2 Thin film Sol-gel Porous structure Photocatalytic activity
日期:	2013-12
上传时间:	2014-02-21 14:32:58 (UTC+8)
摘要:	In this study, porous TiO2 thin films were prepared by the sol-gel method employing polyethylene glycol 1000 (PEG 1000) as an organic template. Pore sizes were adjusted by varying the concentration of PEG 1000. The optimal PEG concentration range required to form TiO2 films with a regular porous structure was investigated and was found to be 0.01-0.015 M. As the PEG 1000 concentration increased, the surface of these films became rougher because of larger pores. Degradation of methylene blue (MB) under UV irradiation was used to determine the photocatalytic activity of the films. In addition, the effect of the pH value of the MB solution on the films was evaluated by controlling its pH value at 5, 7, and 9. The results showed that the photocatalytic activity was correlated to the pore size and pore density of the thin films. TiO2 thin films possessing pore sizes in the diameter range of 35-85 nm exhibited the best conversion of 98% after 8 h of UV irradiation when the pH value was 7.
關聯:	JOURNAL OF THE CHINESE CHEMICAL SOCIETY Volume: 60 Issue: 12 Pages: 1457-1462
显示于类别:	[勞動暨人力資源學系碩士班] 期刊論文

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