Photocatalytic degradation of 1, 2-dichloroethane by V/TiO2: The mechanism of photocatalytic reaction and byproduct

Yi Hsing Lin, Wen Chi Hung, Yu Chun Chen, Hsin Chu

研究成果: Article

7 引文 斯高帕斯(Scopus)

摘要

The nano-sized V/TiO2 prepared by a sol-gel method calcined at 500°C for 3 h was characterized in this study. The synthesized photo-catalysts were used for the photo-degradation of 1, 2-dichloroethane (1, 2-DCE). From X-ray powder diffraction data, the crystal phase presents the mixture of anatase and rutile phases with anatase the dominant phase. From TEM images, the crystallites of photo-catalysts are spherical particles with a crystallite size about 10-20 nm. UV-Visible absorption spectra of V/TiO2 show a slightly increase in absorbance in the visible light region with the increasing vanadium ion doping concentration. The X-ray photoelectron spectroscopy results indicate that the doped vanadium ions exist in the form of V (IV). The V (IV) may alleviate the surface poison phenomenon and act as both h+/e- traps to reduce the recombination rate of h+/e- pairs, and the optimum vanadium doping amount is 0.01 mol%. The products and byproducts of 1, 2-DCE photo-degradation include H2O, CO, CO2, C2H5Cl, CH2Cl2, and HCl.

原文English
頁(從 - 到)280-292
頁數13
期刊Aerosol and Air Quality Research
14
發行號1
DOIs
出版狀態Published - 2014 二月

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Pollution

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