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Journal of colloid and interface science v.512, 2018년, pp.784 - 791   SCI SCIE
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In-situ ion-exchange synthesis Ag2S modified SnS2 nanosheets toward highly photocurrent response and photocatalytic activity

Liu, Yongping (Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, Guilin University of Technology, Guilin, PR China ) ; Geng, Peng (College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, PR China ) ; Wang, Jixiang (College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, PR China ) ; Yang, Zhishu (College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, PR China ) ; Lu, Huidan (Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, Guilin University of Technology, Guilin, PR China ) ; Hai, Jiefeng (Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, Guilin University of Technology, Guilin, PR China ) ; Lu, Zhenhuan (Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, Guilin University of Technology, Guilin, PR China ) ; Fan, Dayong (Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, Guilin University of Technology, Guilin, PR China ) ; Li, Ming (Guangxi Key Laboratory of Electroche ) ;
  • 초록  

    Abstract Heterojunction photocatalyst systems are deemed to be an excellent option to improve the photocatalytic behavior of a material. In this paper, Ag 2 S/SnS 2 heterojunction photocatalysts were prepared by a simple in-situ ion exchange method from SnS 2 nanosheets. The Ag 2 S/SnS 2 composite photoanode exhibits 13.99 μ A/cm 2 photocurrent density at 0.7 V ( vs . Ag/AgCl) in 0.5 M Na 2 SO 4 solution and a significant increase in photocatalytic activity compared to SnS 2 nanosheets. Ag 2 S (8 wt%)/SnS 2 composite shows the highest activity (0.0440 mg/min) in the degradation of MO and good stability. The reactive species trapping experiments confirmed hole (h + ) and hydroxyl radical (OH) are active groups and play key roles in the photocatalytic degradation reaction. The highly effective photoelectrochemical and phocatalytic activities of Ag 2 S/SnS 2 heterojunctions are attributed to the efficient separation of photogenerated hole-electron pairs. This work may provide a novel concept for the rational design of high performance SnS 2 -based photocatalysts. Highlights Constructed Ag 2 S/SnS 2 heterojunction photocatalysts, by in-situ ion exchange method. Ag 2 S/SnS 2 composite shows excellent photochemical activity and the high activity. h + and OH are active groups in the photocatalytic degradation reaction. Graphical abstract [DISPLAY OMISSION]


  • 주제어

    SnS2 .   Ag2S .   Heterojunction .   Photoelectrochemical .   Photocatalyst.  

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