期刊
RENEWABLE ENERGY
卷 139, 期 -, 页码 915-923出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2019.03.002
关键词
PAA/Al/PAA; CdS/Mn2O3; Electrochemical deposition; Photocatalytic reduction of CO2; Photocatalytic efficiency; CO2 conversion efficiency
资金
- Department of Science and Technology/Science and Engineering Research Board [SB/S3/CE/041/2014]
- New Delhi, India
Photocatalytic reduction of CO2 has gained interest due to dual benefits of reduction of global warming and production of synthetic fuels. In this work, we report photochemical reduction of CO2 using CdS and CdS/Mn2O3 nanocomposites as photocatalyst supported on porous anodic alumnia (PAA) support. Incomplete anodization of an aluminum film substrate leaves a thin layer of aluminum in the middle that improves mechanical integrity and retain electrical conductivity of the support. The rod shaped crystals of CdS, grown on the support's pore surface form a crumpled sheet like structure that helps in trapping of light energy incident on the catalyst surface. The photocatalytic reduction of CO2 was performed under the direct sunlight, using reflectors like flat mirrors, compound parabola, and concentrating Fresnel lens to direct solar radiation onto the catalytic surface. The combination of Fresnel lens as concentrator and CdS/Mn2O3 nanocomposite as the catalyst gave exceptional increase in the photocatalytic activity when compared with CdS alone, with a peak formation rate of 52.2 mu mol/g.cat/hr of C2H5OH, 1392.3 mu mol/g.cat/hr of HCOOH and H-2 production at the rate of 2766 mu mol/g.cat/hr. (C) 2019 Elsevier Ltd. All rights reserved.
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