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Degradation of berberine by visible light over Ag3PO4 /g-C3N4 heterojunction catalyst
Received date: 2021-07-05
Online published: 2022-04-18
Ag3PO4/g-C3N4 heterojunction catalyst was synthetized by in-situ growth method,and under visible light emission,the degradation of medicine macromolecular berberine in wastewater was catalyzed oxidation.The composition and structure of the catalyst were analyzed by X-ray diffraction（XRD）,scanning electron microscopy（SEM）,X-ray photoelectron spectroscopy（XPS） and ultraviolet visible diffuse reflectance spectroscopy（UV-vis DRS）.The photocatalytic activity of Ag3PO4/g-C3N4 for the degradation of berberine was tested.The results showed that when the doping amount of g-C3N4 was 0.7 g,the photocatalytic degradation activity of Ag3PO4/g-C3N4 for berberine was the best under visible light irradiation.The degradation rate reached 100% after 15 min of visible light reaction.After four repeated experiments,the degradation rate was decreased to 73.2%,which had good light stability.Free radical capture experiments showed that h+ and ·O2 - played major role in the degradation of berberine wastewater.Combined with UV-vis DRS analysis,Ag3PO4/g-C3N4 followed the Z-type heterojunction mechanism.
Key words： in situ growth method; Ag3PO4/g-C3N4; visible light; berberine; photodegradation
Chang JI , Guosheng WANG . Degradation of berberine by visible light over Ag3PO4 /g-C3N4 heterojunction catalyst[J]. Inorganic Chemicals Industry, 2022 , 54(4) : 175 -180 . DOI: 10.19964/j.issn.1006-4990.2021-0398
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