Acta Phys. -Chim. Sin. ›› 2013, Vol. 29 ›› Issue (12): 2655-2660.doi: 10.3866/PKU.WHXB201310141

• PHYSICAL CHEMISTRY OF MATERIALS • Previous Articles     Next Articles

Synthesis of BiOBr-TiO2 Nanocrystalline Composite by Microemulsion-Like Chemical Precipitation Method and Its Photocatalytic Activity

LUAN Yun-Bo1, FENG Yu-Jie1, WANG Wen-Xin2, XIE Ming-Zheng1, JING Li-Qiang2   

  1. 1 National Engineer Research Centar of Urban Water Resources, Harbin Institute of Technology, State Key Laboratory of Urban Water Resource and Environment, Harbin 150090, P. R. China;
    2 Key Laboratory of Functional Inorganic Materials Chemistry, Ministry of Education, Heilongjiang University, Harbin 150080, P. R. China
  • Received:2013-07-17 Revised:2013-10-14 Published:2013-11-28
  • Contact: FENG Yu-Jie, JING Li-Qiang E-mail:yujief@hit.edu.cn;Jinglq@hlju.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21071048).

Abstract:

Nanocrystalline BiOBr-TiO2 composite has been prepared using a microemulsion-like chemical precipitation method. The key to this method is the dual role of Br- in the synthetic process. The Br- of cetyl trimethyl ammonium bromide is able to link the cetyltrimethyl ammonium cation with anatase TiO2 to form a water-in-oil microemulsion-like system. Meanwhile, Br- is also a bromine source favorable for the fabrication of a nanoheterostructure between BiOBr and TiO2. Compared with pure TiO2 and BiOBr-TiO2 composite obtained using a traditional aqueous system, the as-obtained BiOBr-TiO2 displays high photogenerated charge separation, responsible for excellent photocatalytic activity for degrading liquid-phase phenol solution and gas-phase acetaldehyde. This result is ascribed to its effective heterostructure.

Key words: TiO2, BiOBr, Microemulsion-like chemical precipitation method, Nanocomposite, Photocatalysis

MSC2000: 

  • O643