Acta Phys. -Chim. Sin. ›› 2016, Vol. 32 ›› Issue (2): 551-557.doi: 10.3866/PKU.WHXB201511304

• ARTICLE • Previous Articles     Next Articles

Bi2Sn2o7 Visible-Light Photocatalysts: Different Hydrothermal Preparation Methods and Their Photocatalytic Performance for As(Ⅲ) Removal

Jian-Dong ZHUANG1,*(),Qin-Fen TIAN1,Ping LIU2   

  1. 1 College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, P. R. China
    2 State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, P. R. China
  • Received:2015-10-06 Published:2016-01-30
  • Contact: Jian-Dong ZHUANG E-mail:jdzhuang113@163.com
  • Supported by:
    the National Natural Science Foundation of China(21303244);Outstanding Youth Fund of Fujian Agriculture andForestry University, China(XJQ201419)

Abstract:

Bi2Sn2o7, synthesized through different hydrothermal routes (the microwave hydrothermal method (MH-BSo) and the traditional hydrothermal method (TH-BSo)), was used for photocatalytic removal of arsenic from aqueous solution. The as-synthesized Bi2Sn2o7 products were characterized by X-ray diffraction (XRD), N2 sorption-desorption, UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), transmission electron microscopy (TEM), electron spin resonance (ESR), X-ray photoelectron spectra (XPS), and electrochemistry technology. Under visible light irradiation, the MH-BSo sample exhibited a higher photocatalytic activity (up to 98.7%) than that of the TH-BSo sample during the oxidization of arsenite (Aso3)3-. The active species, o2-• and hVB+, were identified as the primary active species responsible for As(Ⅲ) oxidation. In addition, a possible mechanism for the photo-oxidation of As(Ⅲ) over Bi2Sn2o7 is proposed.

Key words: Bi2Sn2o7, Microwave hydrothermal method, Traditional hydrothermal method, Visible-light photocatalysis, As(Ⅲ) oxidation

MSC2000: 

  • o643