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Photocatalytic degradation of gaseous o-xylene over M-TiO2 (M=Ag, Fe, Cu, Co) in different humidity levels under visible-light irradiation: activity and kinetic study

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Abstract

M-TiO2 (M = Ag, Fe, Cu, Co) photocatalysts were prepared by a sol-gel method with the doping concentration ranging from 0.1 at.% to 1.0 at.% using glacial acetic acid as chelating agent and Ti(OC4H9)4 as precursor. Transition metal ions doping increased the surface area and extended the absorption of TiO2 to visible light region. The photocatalytic performance and kinetic of M-TiO2 samples for degradation of gaseous o-xylene in different humidity levels under visible light irradiation were studied in detail. The photocatalytic activity of M-TiO2 increased with the increasing of humidity level from R.H. 25% to R.H. 60%. The Fe-doped TiO2 shows the best activity among these M-TiO2 (M = Ag, Fe, Cu, Co) photocatalysts. The conversion of o-xylene over 0.5 at.% Fe-TiO2 is 87.3% in R.H. 25% and 95.5% in R.H. 60%, respectively. The photocatalytic process is typical of Langmuir-Hinshelwood model of first-order reaction. The apparent rate constant was calculated.

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Authors and Affiliations

  1. National Synchrotron Radiation Laboratory & School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, 230029, China

    Song Sun, Jun Bao, Chen Gao & Jianjun Ding

  2. Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China

    Chen Gao

Authors
  1. Song Sun
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  2. Jun Bao
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  3. Chen Gao
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  4. Jianjun Ding
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Correspondence to Jun Bao or Chen Gao.

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Sun, S., Bao, J., Gao, C. et al. Photocatalytic degradation of gaseous o-xylene over M-TiO2 (M=Ag, Fe, Cu, Co) in different humidity levels under visible-light irradiation: activity and kinetic study. Rare Metals 30 (Suppl 1), 147–152 (2011). https://doi.org/10.1007/s12598-011-0258-9

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  • DOI: https://doi.org/10.1007/s12598-011-0258-9

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