Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (04): 932-938.doi: 10.3866/PKU.WHXB20110329

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Synthesis and Visible Light Photocatalytic Activity of Cross-Linked Sodium Rectorite/Cu2O Nanocomposites

CHEN Jin-Yi1,2, LI Nian1, LI Jing1, ZHU Liang1, PENG Chang-Jun1   

  1. 1. School of Environment and Civil Engineering, Wuhan Institute of Technology, Wuhan 430073, P. R. China;
    2. Engneering Research Center for Exploitation and Utilization of Phosphorous Resources, Ministry of Education, Wuhan 430073, P. R. China
  • Received:2010-09-14 Revised:2010-12-02 Published:2011-03-29
  • Contact: CHEN Jin-Yi E-mail:jychwit@163.com
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (50804035), Natural Science Foundation of Hubei Province, China (2008CDB375), Wuhan Chenguang Scheme Established under Wuhan Science and Technology Bureau, China (200950431194) and Youth Foundation of Wuhan Institute of Technology, China (Q0806).

Abstract:

CN-REC/Cu2O nanocomposites were synthesized with Cu(CH3COO)2·H2O as a copper source and cross-linked sodium rectorite (CN-REC) as a carrier and template. The obtained samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, and ultraviolet visible diffuse reflectance spectrum (UV-Vis DRS). The results indicate that the regulatory effects of CN-REC on Cu2O are significant. Cu2O is dispersed in the interlayer and on the surface of?the lamellar structure of CN-REC. A Si―O―Cu bond was formed between the cuprous oxide crystal and the CN-REC crystal, which established a bridge for the transfer of photogenerated charge. The energy band gap of the nanocomposites became wider and the photoresponse properties of the nanocomposites became stronger. To study the visible light photocatalytic activity of the nanocomposites, reactive brilliant red (X-3B) was selected as a target contaminant. The photocatalytic degradation rate of X-3B with the nanocomposites is more than 80%, which is better than that with Cu2O. The degradation progress accorded with the L-H kinetics equations.

Key words: Cross-linked sodium rectorite, Cu2O, Nanocomposites, Visible light photocatalytic activity

MSC2000: 

  • O643