화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.29, No.3, 377-383, March, 2012
DOI10.1007/s11814-011-0179-1  Export Citation
Photocatalytic degradation of benzene, toluene, ethylbenzene, and xylene (BTEX) using transition metal-doped titanium dioxide immobilized on fiberglass cloth
Laksana Laokiat1, 2, Pongtanawat Khemthong3, Nurak Grisdanurak4, †, Paiboon Sreearunothai5, Wanwisa Pattanasiriwisawa6, and Wantana Klysubun6
  • 1International Postgraduate Programs in Environmental Management, Graduate School, Chulalongkorn University, Bangkok 10330, Thailand
  • 2NCE for Environmental and Hazardous Waste Management, Chulalongkorn University, Bangkok 10330, Thailand
  • 3National Nanotechnology Center, National Science and Technology Development Agency, Pathumthani 12120, Thailand
  • 4Department of Chemical Engineering, Faculty of Engineering, Thammasat University, Pathumthani 12121, Thailand
  • 5School of Bio-Chemical Engineering and Technology, Sirindhorn International Institute of Technology, Thammasat University, Pathumthani 12121, Thailand
  • 6Synchrotron Light Research Institute, Nakhon Ratchasima 30000, Thailand
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Transition metal (Fe, V and W)-doped TiO2 was synthesized via the solvothermal technique and immobilized onto fiberglass cloth (FGC) for uses in photocatalytic decomposition of gaseous volatile organic compounds--benzene, toluene, ethylbenzene and xylene (BTEX)--under visible light. Results were compared to that of the standard commercial pure TiO2 (P25) coated FGC. All doped samples exhibit higher visible light catalytic activity than the pure TiO2. The V-doped sample shows the highest photocatalytic activity followed by the W- and Fe-doped samples. The UV-Vis diffuse reflectance spectra reveal that the V-doped sample has the highest visible light absorption followed by the W- and Fe-doped samples. The X-ray diffraction (XRD) patterns indicate that all doped samples contain both anatase and rutile phases with the majority (>80%) being anatase. No new peaks associated with dopant oxides can be observed, suggesting that the transition metal (TM) dopants are well mixed into the TiO2 lattice, or are below the detection limit of the XRD. The X-ray absorption near-edge structure spectra of the Ti K-edge transition indicate that most Ti ions are in a tetravalent state with octahedral coordination, but with increased lattice distortion from Fe- to V- and W-doped samples. Our results show that the TM-doped TiO2 were successfully synthesized and immobilized onto flexible fiberglass cloth suitable for treatment of gaseous organic pollutants under visible light.
Keywords:Photocatalytic Degradation;BTEX;Transition Metal-doped TiO2
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