Acta Phys. -Chim. Sin. ›› 2013, Vol. 29 ›› Issue (09): 1975-1980.doi: 10.3866/PKU.WHXB201306212

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

Increasing Specific Surface Area of (110)-Oriented ZnO Nanosheets by Sulfuration-Oxidization Treatment for Photoelectrode Applications

WEI Yu-Long1,2, BAO Chun-Xiong1,2, GAO Hao1,2, HUANG Huan1,2, YU Tao1,2, ZOU Zhi-Gang1,2,3   

  1. 1 National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, P. R. China;
    2 Eco-materials and Renewable Energy Research Center, Department of Physics, Nanjing University, Nanjing 210093, P. R. China;
    3 Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, P. R. China
  • Received:2013-04-25 Revised:2013-06-19 Published:2013-08-28
  • Contact: YU Tao E-mail:yutao@nju.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (11174129) and Natural Science Foundation of Jiangsu Province, China (BK2011056, BE2012089).

Abstract:

To increase the specific surface area of ZnOnanosheets, a sulfuration and oxidization treatment was introduced. First, ZnO nanosheets were grown by the hydrothermal method at a low temperature on the conductive side of the fluorine-doped tin oxide (FTO) conductive glass. The same method was then used to obtain ZnS nanosheets by dipping the FTO with ZnO nanosheets into the precursor of the thioacetamide aqueous solution. In the end, ZnO nanosheets were gained again by sintering ZnS nanosheets at a high temperature in an air atmosphere. The effects of the treatment on ZnO nanosheets were studied with respect to morphology, structure, specific surface area, and pore size distributions. The results showed that the specific surface area of ZnO nanosheets can be doubled after the sulfuration and oxidization treatment. The samples were also introduced into the photoelectrode of dye-sensitized solar cells (DSSCs) and their dye-loading, current density-voltage (J-V), and the monochromatic incident photon-to-electron conversion efficiency (IPCE) were characterized and compared. The results showed that both the dye-loading and IPCE were increased via the sulfuration and oxidization treatment. Above all, the energy conversion efficiency of DSSCs was found to increase by 33%.

Key words: ZnOnanosheet, Sulfuration-oxidization treatment, Specific surface area, Photoelectrode

MSC2000: 

  • O649