Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (6): 1924.doi: 10.7503/cjcu20200745

• Physical Chemistry • Previous Articles     Next Articles

Preparation of Cellular C3N4/CoSe2/GA Composite Photocatalyst and Its CO2 Reduction Activity

WANG Peng, YANG Min, TANG Sengpei, CHEN Feitai, LI Youji()   

  1. Department of Chemistry and Chemical Engineering,Jishou University,Jishou 416000,China
  • Received:2020-10-13 Online:2021-06-10 Published:2021-06-08
  • Contact: LI Youji E-mail:bcclyj@163.com
  • Supported by:
    the National Natural Science Foundation of China(21763010);the Special Research Project from Jishou University,China(Jdy19019)

Abstract:

C3N4/CoSe2 nanoparticles were synthesized by hydrothermal method using cobalt chloride hexahydrate, selenium powder and urea as precursors, and then were anchor on the surface of graphene aerogel(GA) to prepare C3N4/CoSe2/GA photocatalyst. The structure, surface morphology and optical properties of the materials were characterized by X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS), scanning electron microscopy(SEM), transmission electron microscopy(TEM) and UV-Vis diffuse-relective spectroscopy(UV-Vis DRS). At the same time, the photocatalytic activity of the prepared nanomaterials was investigated by reduction of CO2 to CO with using the xenon lamp as visible light source. The results showed that the cellular C3N4/CoSe2/GA catalyst was successfully prepared by introducing CoSe2 and GA on the surface of C3N4 nanometer sheet, and the coupling of GA and CoSe2 with C3N4 could significantly improve the optical absorption density and expand the optical response range, showing lower fluorescence intensity and maximum electron transfer rate. Under the same photocatalysis condition, C3N4/CoSe2/GA displayed the highest catalytic efficiency for CO2 reduction, the CO yield reached 5.75 μmol·g-1·h-1, and the photocatalytic performance was good in repeating process.

Key words: C3N4, CoSe2, Grapheme aerogel, CO2 reduction, Photocatalysis

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