Acta Phys. -Chim. Sin. ›› 2014, Vol. 30 ›› Issue (11): 2121-2126.doi: 10.3866/PKU.WHXB201409191

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Enhanced Visible-Light Photocatalytic Activity and Stability of Nano-Sized Ag2CO3 Combined with Carbon Nanotubes

LIU Su-Qin1,2, WANG Song1, DAI Gao-Peng1,2, LU Jun1, LIU Ke2   

  1. 1. Department of Chemical Engineering and Food Science, Hubei University of Arts and Science, Xiangyang 441053, Hubei Province, P. R. China;
    2. Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices, Xiangyang 441053, Hubei Province, P. R. China
  • Received:2014-06-17 Revised:2014-09-19 Published:2014-10-30
  • Contact: DAI Gao-Peng E-mail:dgp2000@126.com
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (51378183), Natural Science Foundation of Hubei Province, China (2012FFB1903), Research Program of Hubei Province Department of Education, China (Q20132608), Science and Technology Bureau of Xiangyang, China, and Foundation of Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices, China (13XKL02013).

Abstract:

Nano-sized Ag2CO3 and carbon nanotube (CNT) composites were fabricated by a facile chemical precipitation approach in N,N-dimethylformamide (DMF) solvent. The as-prepared Ag2CO3/CNT samples were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and ultra violet-visible (UV-Vis) diffuse reflectance spectroscopy (DRS). The photocatalytic activity of the samples was evaluated by photocatalytic degradation of methyl orange (MO) under visible light irradiation. The results showed that the nano-sizedAg2CO3 particles and CNTs were well combined. The Ag2CO3/CNT composite with CNT content of 1.5%(w) exhibited optimal photocatalytic activity under visible light. Ninetythree percent of the MO was removed by the Ag2CO3/CNT composite within 60 min. For the Ag2CO3/CNT composites, we found that the incorporation of CNT improved the structural stability of Ag2CO3 compared with Ag2CO3. After three cycles, 81% of the MO was decomposed by the Ag2CO3/CNT composite with CNT content of 1.5% (w), but only 59.5% of the MO could be removed by Ag2CO3. The improvements in the activity and stability are attributed to the conductive structure supported by CNTs, which favors electron-hole separation and the removal of photogenerated electrons from the decorated Ag2CO3.

Key words: Ag2CO3/CNT composite, Photocatalysis, Visible light, Stability

MSC2000: 

  • O644