High-temperature sulfurized synthesis of MnxCd1-xS composites for enhancing solar-light driven H2 evolution |
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| Affiliation: | 1. College of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100, China;2. College of Chemistry and Chemical Engineering, Neijiang Normal University, Neijiang, Sichuan 641100, China;3. Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, PR China;4. Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan Guangdong 523808, China |
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| Abstract: | In recent years, tremendous efforts have been devoted to develop new photocatalyst with wide spectrum response for H2 generation from water or aqueous solution. In this paper, MnxCd1-xS composites were in-situ fabricated via the high-temperature sulfurization to enhance the solar-light photocatalytic capacity of H2 evolution. Benefiting from the S defects and junction interface between MnS and CdS, MnxCd1-xS composites exhibited the better H2 evolution rate than pure MnS. The H2 evolution rate of optimal Mn0.5Cd0.5S with a Mn(II) content of 22.52% and a Mn/Cd mole ratio of 0.95:1 was 9.27 mmol g?1 h?1, which was 35.65 and 2.38 times higher than pure MnS (0.26 mmol g?1 h?1) and CdS (3.89 mmol g?1 h?1), respectively. In addition, H2 evolution capacity of Mn0.5Cd0.5S decreased from 44.83 to 41.66 mmol g?1 after three cycles. Mn0.5Cd0.5S prepared via the high-temperature sulfurization was thus a potential material for solar-light induced H2 generation. |
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| Keywords: | High-temperature sulfurization Solar light |
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