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Ceramics international v.43 no.6, 2017년, pp.4992 - 5001   SCI SCIE SCOPUS
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Using Al2O3 defect levels to enhance the photoelectrocatalytic activity of SnS2 nanosheets

Mu, Jianglong (School of Physics, Northwest University, Xi'an, Shaanxi 710069, PR China ); Miao, Hui (School of Physics, Northwest University, Xi'an, Shaanxi 710069, PR China ); Liu, Enzhou (School of Chemical Engineering, Northwest University, Xi'an, Shaanxi 710069, PR China ); Chen, Lida (School of Physics, Northwest University, Xi'an, Shaanxi 710069, PR China ); Feng, Juan (School of Physics, Northwest University, Xi'an, Shaanxi 710069, PR China ); Han, Tongxin (School of Physics, Northwest University, Xi'an, Shaanxi 710069, PR China ); Gao, Ying (School of Physics, Northwest University, Xi'an, Shaanxi 710069, PR China ); Fan, Jun (School of Chemical Engineering, Northwest University, Xi'an, Shaanxi 710069, PR China ); Hu, Xiaoyun (School of Physics, Northwest University, Xi'an, Shaanxi 710069, PR China );
  • 초록  

    Abstract Hexagonal SnS 2 nanosheets and Al 2 O 3 /SnS 2 composites were fabricated via a one-step hydrothermal synthesis method. The investigation indicates that hexagonal SnS 2 with diameters of 100–200nm are well dispersed on the surface of Al 2 O 3 . The band gap of SnS 2 after coupling with 11wt%-Al 2 O 3 is reduced by 0.042eV compared with the pure SnS 2. The composite with 11wt%-Al 2 O 3 shows the highest photocurrent density of 37μA/cm 2 at 0.49V ( vs . Ag/AgCl) under visible light (λ>420nm), which is approximately 1.2 times that of the pure SnS 2 nanosheets. Photoelectrocatalytic measurements demonstrate that an appropriate amount of Al 2 O 3 can enhance the photoelectrocatalytic efficiency of SnS 2 . The 11wt%-Al 2 O 3 /SnS 2 composite (AOSS-11) can degrade 85.9% MB after 3h under visible light illumination at an applied potential of 0.49V ( vs . Ag/AgCl). The highly effective photoelectrocatalytic activity of the Al 2 O 3 /SnS 2 composite is attributed to the efficient separation of photoinduced electron-hole pairs based on the defect levels. This work may provide a new design idea for constructing the effective SnS 2 -based photocatalysts with other defective semiconductors.


  • 주제어

    SnS2 .   Al2O3/SnS2 composite .   Photoelectrocatalysis .   Defect levels.  

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