Chinese Journal of Applied Chemistry ›› 2023, Vol. 40 ›› Issue (3): 420-429.DOI: 10.19894/j.issn.1000-0518.220235

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Preparation of Cu2O/CuO-g-C3N4 Adsorbent by One-step Thermal Polymerization and Adsorption Properties for Methyl Orange

Bo XIONG, Tai-Hua LI, Wu-Ping ZHOU, Chang-Yu LIU(), Xiao-Long XU()   

  1. School of Biotechnology and Health Sciences,Wuyi University,Jiangmen 529020,China
  • Received:2022-07-08 Accepted:2023-02-19 Published:2023-03-01 Online:2023-03-27
  • Contact: Chang-Yu LIU,Xiao-Long XU
  • About
  • Supported by:
    the National Natural Science Foundation of China(21974097);the Education Department of Guangdong Province(2020KSYS004);Guangdong Province's Special Fund for Science and Technology Innovation Strategy (College Students' Science and Technology Innovation Cultivation)(pdjh2022b0531);the Science and Technology Bureau of Jiangmen(2019030102360012639);the Undergraduate Training Programs of Wuyi University(202111349019)


In this paper, Cu2O/CuO graphite carbon nitride adsorbent is prepared by one-step thermal polymerization with cuprous oxide and dicyandiamide as precursors. The introduction of copper oxide expands the π conjugation system of g-C3N4 effectively, which is conducive to the adsorption of dyes with benzene ring structure through π-π interaction; Cu2O/CuO-g-C3N4 adsorbent has mesoporous structures with various pore sizes, which increases its specific surface area and provides sufficient active sites for dye adsorption. The adsorption influencing factors of methyl orange, such as the preparation conditions of adsorbent, dosage, dye concentration, adsorption time, stirring speed, pH, etc., are studied. The maximal absorption ratio is 96.11% under the optimal conditions. The kinetic analysis shows that the adsorption process is a quasi first-order kinetic model. According to the adsorption isothermal experiment, the adsorption isotherm belongs to Langmuir adsorption isotherm. In the whole adsorption experiment, the maximum equilibrium adsorption amount is 241.25 mg/g.

Key words: Cu modified carbon absorbent, Methyl orange, Thermal polymerization, Graphite carbon nitride

CLC Number: