This study reports use of the photocatalysts of SrFeO3-x/g-C3N4 heterojunction to photocatalytic degradation Chloramphenicol (CAP) in aqueous under visible irradiation. Herein, the novel heterojunctions of SrFeO3-x/g-C3N4 fabricated by sintering SrFeO3-x with g-C3N4.SrFeO3-x was synthesized through sintering method with Fe2O3 and SrCO3 at 1000oC, for 24 h. The g-C3N4 powder was prepared by directing calcining melamine in a muffle furnace. In a typical synthesis run, 5 g melamine was placed in a semi-closed alumina crucible with a cover. The crucible was heated to 520 oC for 4 h with a heating rate of 10oC/min. After cooling to room temperature, g-C3N4 was obtained in a powder form. The structure and morphology of SrFeO3-x/g-C3N4 photocatalysts were characterized by field emission scanning electron microscopy-energy dispersive spectroscopy (FESEM-EDS), X-ray diffraction (XRD), high resolution X-ray photoelectron spectroscopy (HRXPS), and UV-vis diffuse reflectance spectroscopy (DRS). Their photocatalytic activities were evaluated by degrading CAP in aqueous solution induced by visible light. In order to get better understanding on the products and mechanistic details of the photocatalytic degradation of CAP in aqueous SrFeO3-x/g-C3N4 suspensions under visible light irradiation. The intermediates formed in the degradation CAP processes were separated and identified by HPLC-ESI-MS technique. The possible degradation pathways were proposed and discussed in this research. The study was useful to synthesized SrFeO3-x/g-C3N4 and to degradation the CAP at future applications of environmental pollution and control.

Photocatalytic degradation of chloramphenicol by SrFeO3-x/g-C3N4 heterojunction

248th National Meeting (2014)

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