Abstract
The increasing environmental deterioration poses a severe threat to human health and ecosystems, and the photocatalytic degradation of environmental pollutions has gained intensive interest in recent years. In this study, we prepared a novel ternary Ag3PO4/g-C3N4/Znln2S4 (ACZ) photocatalyst by a hydrothermal method and deposition-precipitation technique. The ACZ composites exhibited much higher photocatalytic activities for the degradation of tetracycline (TC) than the sum of g-C3N4, Znln2S4, Ag3PO4/g-C3N4, Ag3PO4/Znln2S4 or g-C3N4/Znln2S4 under visible light irradiation (λ>420nm) in the photocatalytic tests. Especially, when the content of Ag3PO4 reached 3wt% (ACZ-3), the ACZ-3 displayed the highest photocatalytic activity, which can degrade 83% TC (20mg/L) within 60min. The improvement in photocatalytic performance of the ternary photocatalyst is mainly attributed to the extended absorption in the visible light region and the effective separation of photogenerated electron-hole pairs between the Ag3PO4 and g-C3N4/Znln2S4.
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