Chinese Journal of Catalysis ›› 2020, Vol. 41 ›› Issue (10): 1554-1563.DOI: 10.1016/S1872-2067(19)63498-4

• Articles • Previous Articles     Next Articles

In-situ fabrication SnO2/SnS2 heterostructure for boosting the photocatalytic degradation of pollutants

Ying Liua, Donglai Pana, Mingwen Xiongb, Ying Taoa, Xiaofeng Chena, Dieqing Zhanga, Yu Huangc, Guisheng Lia   

  1. a The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China;
    b School of Materials and Chemical Engineering, Bengbu University, Bengbu 233030, Anhui, China;
    c Key Laboratory of Aerosol Chemistry and Physics of CAS, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, Shaanxi, China
  • Received:2020-02-23 Revised:2020-03-21 Online:2020-10-18 Published:2020-08-15
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (21677099, 21876113), Anhui Province (KJ2018A0571), Bengbu University (BBXY2018KYQD21), The Education Ministry Key Lab of Resource Chemistry (00007908), Shanghai Engineering Research Center of Green Energy Chemical Engineering, and Key Laboratory of Aerosol Chemistry and Physics (KLACP1901).

Abstract: Heterostructure photocatalysts with a built-in electric field have become one of the most promising strategies to enhance photogenerated electron-hole pair separation. However, close contact between the two active components of heterogeneous photocatalysts remains a problem. Herein, the in-situ fabrication of an SnO2/SnS2 heterostructure photocatalyst was performed; the structure showed enhanced photocatalytic performance resulting from the tight-contact heterostructures. The results of photoelectrochemical measurements further verified that a tight-contact heterostructure improved the separation of photogenerated electron-hole pairs. The results of EIS Bode plots also demonstrated that such in-situ fabricated SnO2/SnS2 samples exhibited the longest carrier lifetime (41.6 μs) owing to the intimate interface of SnO2/SnS2 heterostructures.

Key words: in-situ fabrication, SnO2/SnS2 heterostructure, Photo-degradation, Photogenerated carrier separation