Nano

SKKU Advanced Institute of Nano Technology (성균관대학교 성균나노과학기술원)
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Construction of Strontium Titanate/Binary Metal Sulfide Heterojunction Photocatalysts for Enhanced Visible-Light-Driven Photocatalytic Activity

  • Yu, Yongwei (Advanced Catalysis and Green Manufacturing Collaborative Innovation Center School of Petrochemical Engineering, Changzhou University) ;
  • Yang, Qing (Advanced Catalysis and Green Manufacturing Collaborative Innovation Center School of Petrochemical Engineering, Changzhou University) ;
  • Ma, Jiangquan (Advanced Catalysis and Green Manufacturing Collaborative Innovation Center School of Petrochemical Engineering, Changzhou University) ;
  • Sun, Wenliang (Advanced Catalysis and Green Manufacturing Collaborative Innovation Center School of Petrochemical Engineering, Changzhou University) ;
  • Yin, Chong (Advanced Catalysis and Green Manufacturing Collaborative Innovation Center School of Petrochemical Engineering, Changzhou University) ;
  • Li, Xiazhang (Advanced Catalysis and Green Manufacturing Collaborative Innovation Center School of Petrochemical Engineering, Changzhou University) ;
  • Guo, Jun (Advanced Catalysis and Green Manufacturing Collaborative Innovation Center School of Petrochemical Engineering, Changzhou University) ;
  • Jiang, Qingyan (Advanced Catalysis and Green Manufacturing Collaborative Innovation Center School of Petrochemical Engineering, Changzhou University) ;
  • Lu, Zhiyuan (Advanced Catalysis and Green Manufacturing Collaborative Innovation Center School of Petrochemical Engineering, Changzhou University)
  • Received : 2018.07.12
  • Accepted : 2018.10.05
  • Published : 2018.11.30
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Abstract

A novel strontium titanate/binary metal sulfide ($SrTiO_3/SnCoS_4$) heterostructure was synthesized by a simple two-step hydrothermal method. The visible-light-driven photocatalytic performance of $SrTiO_3/SnCoS_4$ composites was evaluated in the degradation of methyl orange (MO) under visible light irradiation. The photocatalytic performance of $SrTiO_3/SnCoS_4-5%$ is much higher than that of pure $SrTiO_3$, $SnCoS_4$, $SrTiO_3/SnS_2$ and $SrTiO_3/CoS_2$. The $SrTiO_3/SnCoS_4$ composite material with 5 wt.% of $SnCoS_4$ showed the highest photocatalytic efficiency for MO degradation, and the degradation rate could reach 95% after 140 min irradiation time. The enhanced photocatalytic activity was ascribed to not only the improvement of visible light absorption efficiency, but also the construction of a heterostructure which make it possible to effectively separate photoexcited electrons and holes in the two-phase interface.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China

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