Chinese Journal of Applied Chemistry ›› 2020, Vol. 37 ›› Issue (8): 923-929.DOI: 10.11944/j.issn.1000-0518.2020.08.200034

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Preparation and Photoelectric Performance of Graphene Oxide/Ultrafine Silver Composite

GAO Siheng, YANG Yu, WU Jinling, QIN Lixia, KANG Shizhao, LI Xiangqing*   

  1. School of Chemical and Environmental Engineering,Shanghai Institute of Technology,Shanghai 201418,China
  • Received:2020-02-04 Published:2020-08-01 Online:2020-08-07
  • Contact: LI Xiangqing, professor; Tel:021-60877231; Fax:021-64253317; E-mail:xqli@sit.edu.cn; Research interests:green energy chemistry
  • Supported by:
    National Natural Science Foudation of China(No. 21771125), and the Shanghai Science and Technology Commission Local Capacity Building Project (No.19090503700)

Abstract: Ultrafine silver powder has shown wide applications in the fields of communication, electronics and front electrode of solar cells. Its size distribution, dispersion and surface state have close relationship with its performance. In this paper, in order to obtain ultrafine silver composite with narrow size distribution, good dispersibility and high conductivity, graphene oxide (GO) was introduced in the later period of silver particles synthesized by liquid phase reduction. The structure and morphology of the composite silver powder were characterized by X-ray diffraction, Raman spectroscopy, and scanning electron microscopy. The results show that the ultrafine silver powders obtained by this method possess good dispersion and narrow size distribution. Furthermore, the interaction between GO and silver particles was explored by UV-visible spectroscopy. It is also found that by fixing the concentration of silver nitrate solution, and increasing the content of GO, the conductivity of silver powder first increases, and then decreases. When the mass percentage of GO is 2.5%, due to more effective contact among silver particles, its interfacial resistance is lower and photocurrent is higher. It will provide important data and valuable reference for the application of ultrafine silver.

Key words: ultrafine silver powder, graphene oxide, preparation method, conductivity, interfacial resistance