Photocatalytic Reduction of CO2 over CdxZn1-xS Photocatalysts

Xue Feng Bai; Xian Da Li

doi:10.4028/www.scientific.net/AMR.610-613.319

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 610-613Photocatalytic Reduction of CO2 over CdxZn1-xS...

Photocatalytic Reduction of CO₂ over Cd_xZn_1-xS Photocatalysts

Abstract:

A series of Cd_xZn_1-xS (x=0.1~0.9) composite photocatalysts were prepared by coprecipitation method. The above-prepared photocatalysts were characterized by X-ray diffraction (XRD), UV-Vis diffusive reflectance spectroscopy (DRS),surface photovoltage spectroscopy (SPS). It was shown from XRD that Cd_xZn_1-xS solid solution semiconductors were of hexagonal phase in agreement with pure CdS. The DRS and SPS results showed that the band gap energy gradually reduced with the increasing of x value in Cd_xZn_1-xS, and when x = 0.7, the Cd_0.7Zn_0.3S photocatalyst had the strongest surface photovoltage. It was found from photocatalytic reduction of CO₂ that the highest HCOOH production rate of 342.64 μmol/(g•h) over Cd_0.7Zn_0.3S photocatalyst among a series of Cd_xZn1-xS photocatalysts were obtained under 250 W high pressure mercury lamp.

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Periodical:

Advanced Materials Research (Volumes 610-613)

Pages:

319-322

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.610-613.319

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Online since:

December 2012

Authors:

Xue Feng Bai, Xian Da Li

Keywords:

Cd_xZn_1-xS, CO₂ Reduction, Photocatalysis

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