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首页> 外文期刊>Journal of Materials Research >Visible-light-driven peroxydisulfate activation by BiOI/g-C3N4 heterojunction for high-concentration dyes degradation: A comprehensive study
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Visible-light-driven peroxydisulfate activation by BiOI/g-C3N4 heterojunction for high-concentration dyes degradation: A comprehensive study

机译：Visible-light-driven peroxydisulfate activation by BiOI/g-C3N4 heterojunction for high-concentration dyes degradation: A comprehensive study

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The synergy between photocatalysis and persulfate-based oxidation is an emerging strategy to improve the overall reaction efficiency of organic contaminants degradation. Constructing an appropriate semiconductor heterojunction can further magnify this synergic effect. Here, we firstly employed a flower-like BiOI/g-C3N4 (BCN) with Z-scheme heterostructure to activate peroxydisulfate (PDS) under visible light irradiation for the degradation of high-concentration Rhodamine B (RhB). The results revealed that the bifunctional BCN heterojunction could not only increase the photocatalytic activity but also enhance the persulfate-activated ability under visible light irradiation. The radical and non-radical oxidation pathways predominated over the RhB degradation. In the radical pathway, O-1(2) and h(+) were the main reactive species. In the non-radical pathway, the mediated electron transfer and surface-bound reactions were supposed as the dominant mechanisms. Furthermore, it was of practical significance that the superior photocatalytic PDS activation performance appeared at pristine pH of dye solution with high concentration.

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