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Journal of Nanomaterials
Volume 2017, Article ID 9346201, 8 pages
https://doi.org/10.1155/2017/9346201
Research Article

A Study of Photocatalysis of Methylene Blue of TiO2 Fabricated by Electric Spark Discharge Method

1Department of Electrical Engineering, National Taipei University of Technology, Taipei, Taiwan
2Department of Power Supply, Taiwan Power Company, Taipei, Taiwan

Correspondence should be addressed to Kuo-Hsiung Tseng; wt.ude.tutn.ee@gnesthk

Received 2 April 2017; Revised 19 June 2017; Accepted 16 July 2017; Published 8 October 2017

Academic Editor: Vincenzo Baglio

Copyright © 2017 Kuo-Hsiung Tseng et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This study used the Electric Spark Discharge Method (ESDM) to prepare nano-Ti colloid. The results showed that the process efficiency increased according to the current and selecting different discharge periods (-). The preparation process is pollution-free and very contributive to using TiO2 for photocatalytic reaction to degrade organic compounds. This study used 99.9% pure Ti metal to examine the effects of different discharge parameter settings on the photocatalysis of methylene blue. The experimental results showed that the discharge period (-) has an effect on the characteristics of the prepared nano-Ti colloid but affects its concentration. The nano-Ti colloid, as prepared under different parameters, has poor photocatalytic reaction with methylene blue at the concentration of 50 mg/L. The nano-Ti colloid does not have favorable effect on degrading methylene blue above 50 mg/L. For degrading methylene blue at a low concentration of 10 mg/L, the 100-100 nano-Ti parameter is preferable. For degrading methylene blue at a high concentration of 30 mg/L, nano-Ti colloid with exceeding 100 and fixed at 100 is better. As the nano-Ti colloid prepared by ESDM was free of chemical agents, when TiO2 was used in photocatalytic reaction to degrade organic compounds, there was no secondary pollution to the environment.