Acta Phys. -Chim. Sin. ›› 2014, Vol. 30 ›› Issue (10): 1909-1915.doi: 10.3866/PKU.WHXB201408046

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Preparation and Characterization of Co3(PO4)2/Ag3PO4 Nanocomposites for Visible-Light Photocatalysis

GU Yong-Qin, WANG Bo, GU Xiu-Quan, ZHAO Yu-Long, QIANG Ying-Huai, ZHANG Shuang, ZHU Lei   

  1. School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu Province, P. R. China
  • Received:2014-06-05 Revised:2014-08-03 Published:2014-09-30
  • Contact: QIANG Ying-Huai
  • Supported by:

    The project was supported by the Natural Science Youth Foundation of Jiangsu Province, China (BK20130198) and Fundamental Research Funds for the Central Universities, China (2013XK07).


In this study, Ag3PO4 nanoparticles (NPs), cobalt phosphate (Co3(PO4)2, CoP) nanosheets (NSs), and their composites (CoP/Ag3PO4) were synthesized via a facile chemical precipitation method. Their visiblelight photocatalytic activities were compared and investigated. The structural, morphological, optical, and visiblelight photocatalytic properties of the prepared samples were characterized by X-ray diffraction (XRD), fieldemission scanning electron microscopy (FESEM), ultraviolet- visible (UV- Vis) diffuse absorbance and photoluminescence (PL) spectroscopies. We found that both the degradation rate and cyclical stability of the CoP/Ag3PO4 hybrids increased significantly under visible-light irradiation when methyl orange (MO) was used as the target with reference to single-phase Ag3PO4 NPs or CoP NSs. This suggests that CoP might play a cocatalyst role, which suppresses carrier recombination and provides a large number of photogenerated holes. Additionally, we also observed that the CoP/Ag3PO4 hybrids hardly degraded Rhodamine B (RhB), a cationic dye. This behavior might be attributed to the lower amount of dye molecule absorption because of a change in surface polarity. We thus present a new approach for the development of low-cost and visible-light responsive photocatalysts.

Key words: Ag3PO4, Co3(PO4)2, Visible-light photocatalysis, Methyl orange, Rhodamine B