Ying Zhou,1,2* Meng Dan,1,2 Arvind Prakash2
1State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University
2The Center of New Energy Materials and Technology, School of Materials Science and Engineering, Southwest Petroleum University, Chengdu 610500, China
Nano-Micro Conference, 2017, 1, 01052
Published Online: 28 October 2017 (Abstract)
Hydrogen sulfide is an extremely toxic gas which is generated from both nature and human factors. Recently, photocatalytic splitting of H2S into H2 and S has attracted great attention because hydrogen production and H2S removal are simultaneously achieved. However, the deactivation of the photocatalysts and lack of suitable setup for photocleavage of H2S to H2 limit its wide application. Herein, we constructed a complete setup for H2 production from H2S. This setup has some functions including H2S absorption, decomposition and product recovery. Simultaneously, a series of MnS/In2S3 composites were successfully fabricated by a solvothermal method. A maximum H2 production rate of 8360 μmol g-1 h-1 can be achieved over MnS/In2S3_0.7 catalyst, and the corresponding QE of this sample is as high as 34.2% at 450 nm even in the absence of any noble-metal co-catalysts. Importantly, MnS/In2S3 composite displays a good stability and also anti-photocorrosion. Additionally, in order to further enhance visible-light photocatalytic H2 production activity of MnS/In2S3, MnS/In2S3/CuS composites were prepared through solvothermal treatment. And a maximum H2 production rate of 29252 μmol g-1 h-1 can be achieved over a MnS/In2S3/CuS with optimized composition, which is 3.5 times higher than that of MnS/In2S3_0.7, and this reveals that the addition of CuS can effectively increase the photocatalytic activity for splitting H2S into H2. All in all, suitable setup for photocatalytic splitting of H2S and noble-metal free metal sulphides photocatalysts have great significance for photocleavage of H2S to H2.
Figure 1. Photocatalytic process of splitting H2S in 0.6 M Na2SO3/0.1 M Na2S/3 M H2S solution.
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