Sulfide photocatalysts are one of the widely recognized excellent ***,the stability of sulfide photocatalysts has always been a challenging problem in the field of ***,an in-situ oxidation strategy was designed to con...
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Sulfide photocatalysts are one of the widely recognized excellent ***,the stability of sulfide photocatalysts has always been a challenging problem in the field of ***,an in-situ oxidation strategy was designed to construct ZnO/ZnS homologous S-scheme catalysts and solve its poor stability *** results indicates that the obtained ZnO/ZnS homologous heterojunction not only has dual-function performance,but also has good recover ability in photocatalytic performance:the photocatalytic H_(2)O_(2)yield can reach 517.32μmol g^(–1)(in pure water)after two hours,the photocatalytic H_(2)yield is 140.45 mmol g^(–1)in 5 h,which were 2.2 times and 84 times than that of the ZnS,***,the recovery rate of photocatalytic performance can be increased from 33.3%to 97.2%.The excellent photocatalytic performance is attributed to that the obtained homologous heterojunction can not only broaden the light absorption capacity(370–600 nm),but also facilitate the separation and transfer of photogenerated *** high recovery rate of photocatalytic stability is due to the re-generation of zinc oxide in the oxidation process,which makes the photocatalyst return to the original homologous heterojunction ***,experimental results,density functional theory calculations and Kelvin probe force microscopy indicate that the photo-induced carrier transfer pathway follows the S-scheme heterojunction *** work provides new ideas and breakthroughs for the design and construction of sulfide photocatalysts with excellent photocatalytic stability.
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