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

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)280-292
Number of pages13
JournalAerosol and Air Quality Research
Volume14
Issue number1
DOIs
Publication statusPublished - 2014 Feb 1

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Pollution

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