Chem. J. Chinese Universities ›› 2014, Vol. 35 ›› Issue (10): 2170.doi: 10.7503/cjcu20140339

• Physical Chemistry • Previous Articles     Next Articles

Preparation, Characterization and Visible-light Photocatalytic Activities of p-n Heterojunction BiOBr/NaBiO3 Composites

JI Lei*(), WANG Haoren, YU Ruimin   

  1. Provincial Key Laboratory of Oil and Gas Chemical Technology, College of Chemistry and Chemical Engineering,Northeast Petroleum University, Daqing 163318, China
  • Received:2014-04-10 Online:2014-10-10 Published:2014-09-19
  • Contact: JI Lei E-mail:jileiwipm@163.com
  • Supported by:
    Supported by the College Young Scholar Supporting Project for Heilongjiang Institutions of Higher Education, China(No.1251G002), the Science Found for Young Scholars of Northeast Petroleum University, China(No.2012QN114), and the Open Fund of Key Laboratory of Petroleum and Natural Gas Chemical Industry for Heilongjiang Colleges and Universities, China(No.HXHG2012-0)

Abstract:

BiOBr/NaBiO3 heterostructures were synthesized by a simple chemical etching method using hydrobromic acid as etching agent to react with NaBiO3. X-ray powder diffraction(XRD), UV-Vis diffuse reflectance spectra(UV-Vis DRS) and scanning electron microscope(SEM) were employed to study the phase structures, morphologies and optical properties of the samples. The as-prepared samples exhibited more efficient photocatalytic activities than pure NaBiO3 and BiOBr for the degradation of Rhodamine B(RhB) under visible light irradiation, which could be attributed to the efficient separation of electron-hole pairs caused by the formation of BiOBr/NaBiO3 heterojunction. Terephthalic acid photoluminescence(TA-PL) probing test and radicals scavenger experiments demonstrated that h+ was the dominant reactive species while the effect of ·OH and ·O2- was negligible. A possible transfer process of photogenerated carriers was proposed based on the band structures of NaBiO3 and BiOBr and the experimental results.

Key words: Photocatalysis, BiOBr/NaBiO3, Heterojunction(Ed.: S, Z, M)

CLC Number: 

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