Metformin Degradation in Water by a Novel and Stable Ag/Ag3po4/Hap/Go Photocatalyst
The carcinogenic chlorination byproducts of metformin likely pose an extensive threat to the safe and sustainable global drinking water supply and human health. Therefore, metformin must be removed beforechlorine disinfection of drinking water. In this work, the photocatalytic degradation of metformin using a novel Ag/Ag3PO4/HAP/GO composite was investigated. This photocatalyst was synthesized by an in situ ion exchange approach between Ca2+ in biomass hydroxyapatite (HAP) and Ag+ and by introducing dopant graphene oxide (GO). With the help of ultrasound, Ag3PO4 was generated on the surface of HAP, GO doping was completed, and a small amount of Ag0 was produced by the reduction of the aldehyde groups on GO sheets. The results showed that by virtue of the SPR effect of Ag0 and the high carrier mobility of GO, the light absorption of the composite became wider and stronger, and the carrier separation efficiency of Ag3PO4 was significantly enhanced. In addition, metformin could be degraded by the oxidation of the photoexcited holes on the valence band of Ag3PO4 and the superoxide anion generated on the conduction band of HAP. This work provides a meaningful application direction for the photocatalytic degradation of metformin by Ag/Ag3PO4/HAP/GO using biomass hydroxyapatite as a raw material
Year of publication: |
[2022]
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Authors: | Du, Xiaohui ; Pu, Yuguang ; Jia, Puqi ; Zhao, Shasha ; Li, Zhongguo |
Publisher: |
[S.l.] : SSRN |
Saved in:
freely available
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