화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.35, No.5, 1089-1098, May, 2018
DOI10.1007/s11814-018-0007-y  Export Citation
Photoreduction of CO2 into CH4 using Bi2S3-TiO2 double-layered dense films
Junyeong Kim, Jeong Yeon Do, No-Kuk Park1, Seung Jong Lee2, Jin-Pyo Hong3, and Misook Kang†
  • Department of Chemistry, College of Sciences, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Korea
  • 1School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Korea
  • 2Institute for Advanced Engineering, 175-28, Goan-ro 51beon-gil, Baegam-Myyeon, Cheoin-gu, Yongin-si, Gyeonggi 17180, Korea
  • 3Korea Electric Power Corporation Research Institute, 105 Munji-ro, Yuseong-gu, Daejeon 34056, Korea
E-mail:
Nano-sized bismuth sulfide (Bi2S3) and titanium dioxide (TiO2) with the orthorhombic and anatase tetragonal structures, respectively, were synthesized for application as catalysts for the reduction of carbon dioxide (CO2) to methane (CH4). Four double-layered dense films were fabricated with different coating sequences.TiO2 (bottom layer)/Bi2S3 (top layer), Bi2S3/TiO2, TiO2/Bi2S3 : TiO2 (1 : 1) mix, and Bi2S3 : TiO2 (1 : 1) mix/Bi2S3 : TiO2 (1 : 1) mix.and applied to the photoreduction of CO2 to CH4; the catalytic activity of the fabricated films was compared to that of the pure TiO2/TiO2 and Bi2S3/Bi2S3 doubled-layered films. The TiO2/Bi2S3 double-layered film exhibited superior photocatalytic behavior, and higher CH4 production was obtained with the TiO2/Bi2S3 double-layered film than with the other films. A model of the mechanism underlying the enhanced photoactivity of the TiO2/Bi2S3 double-layered film was proposed, and it was attributed in effective charge separation.
Keywords:Double Layered Film;Bismuth Sulfide;Coating Sequence;Carbon Dioxide;Photoreduction;Charge Separation
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