Chinese Journal of Applied Chemistry ›› 2020, Vol. 37 ›› Issue (4): 471-480.DOI: 10.11944/j.issn.1000-0518.2020.04.190247

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Preparation of Ag/Two-Dimensional Graphitic Carbon Nitride/Reduced Graphene Oxide Composite and Its Photocatalytic Degradation of Antibiotics

HUO ZhaoHuiab*(),YANG Xiaoshanb,CHEN Xiaolib,ZHANG Gangc,YIN Weiab,CAO Manliab,SHI Leiab,QIU Yanxuanab   

  1. aDepartment of Chemistry, Guangdong University of Education,Guangzhou 510303,China
    bEngineering Technology Development Center of Advanced Materials & Energy Saving and Emission Reduction in Guangdong Colleges and Universities,Guangzhou 510303,China;
    cShenzhen Fangrun Environmental Technology Co. LTD,Shenzhen,Guangdong 518107,China
  • Received:2019-09-16 Accepted:2020-02-10 Published:2020-04-01 Online:2020-04-10
  • Contact: HUO ZhaoHui
  • Supported by:
    Supported by the Innovation and Strong School Funding from Guangdong University of Education(No.2016KQNCX112), the Engineering Technology Development Center of Advanced Materials & Energy Saving and Emission Reduction in Guangdong Colleges and Universities(No.2016GCZX007), the College Students' Scientific and Technological Innovation Project(No.201914278112, No.201914278113), and the Higher Education Teaching Reform Project in Guangdong Province(2018)


In order to optimize the structure of graphitic carbon nitride (g-C3N4) photocatalyst and improve its degradation performance to pollutants, two-dimensional graphitic carbon nitride (2D-C3N4) was prepared by high temperature calcination and thermal oxidation stripping with melamine as the precursor. Ag/2D-C3N4/rGO(reduced graphene oxide) composite photocatalyst was synthesized by photoreduction method. The material obtained was characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS), photoluminescence spectroscopy (PL), X-ray photoelectron spectroscopy (XPS) and nitrogen adsorption desorption isotherm curve (BET). Taking ceftriaxone sodium as the target pollutant, the effects of pH, catalyst dosage and initial concentration of ceftriaxone sodium on the adsorption and degradation properties of the catalyst were investigated, and the degradation reaction mechanism was explored. When pH=6.0, the amount of catalyst is 0.3 g/L, and the initial concentration of ceftriaxone sodium is 10 mg/L, the degradation rate of ceftriaxone sodium can reach 89.1%. The catalyst has strong stability and can be used for treating wastewater containing cephalosporin antibiotics.

Key words: two-dimensional graphitic carbon nitride, Ag, reduced graphene oxide, photocatalytic degradation, ceftriaxone sodium