Chemical Journal of Chinese Universities ›› 2019, Vol. 40 ›› Issue (12): 2590-2597.doi: 10.7503/cjcu20190329

• Physical Chemistry • Previous Articles     Next Articles

Construction of Ag2CO3/Bi2O2CO3 p-n Heterojunction and Its Photocatalytic Activity

Junjin WANG1,Guoying ZHANG1,2,*(),Yaqiu SUN1,Jingwang LIU1,*()   

  1. 1. College of Chemistry, Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education, Tianjin Normal University, Tianjin 300387, China
    2. College of Chemistry, Chemical Engineering and Materials Science, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Shandong 250014, China
  • Received:2019-06-11 Online:2019-12-04 Published:2019-12-04
  • Contact: Guoying ZHANG,Jingwang LIU E-mail:hxxyzgy@tjnu.edu.cn;hxxyljw@tjnu.edu.cn
  • Supported by:
    ? Supported by the Open Foundation of Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, China(ZDSYS-KF201503)

Abstract:

Ag2CO3/Bi2O2CO3(BOC) composite photocatalysts were prepared by a successive precipitation strategy. SEM and TEM results showed that Ag2CO3 nanoparticles were dispersively deposited on the surface of BOC nanosheets. A good p-n heterojunction structure was formed between the two semiconductors. The surface composite of Ag2CO3 effectively widened the light absorption of BOC and promoted the separation of photoinduced carriers. Accordingly, the photoactivity of Ag2CO3/BOC composite was greatly improved. In particular, the sample with Ag2CO3 content of 0.62% showed the best photocatalytic behavior with degradation rate improved by 1.8 times compared with that of BOC. Combining the detected oxidation species and the band positions of the semiconductors, the formation of space charge layer and the charge migration at the p-n heterojunction interface of Ag2CO3 and BOC were proposed.

Key words: Bi2O2CO3, Ag2CO3, p-n Heterojunction, Photocatalysis, Charge migration

CLC Number: