Abstract
A series of ZnInxS4+y (x=1.6, 2.0, 2.3, 2.6, 2.9, 3.1) photocatalysts were synthesized via a facile hydrothermal method and characterized by various analytical techniques, such as XRD, EDS, UV–vis DRS, SEM, TEM, BET and PL. The ZnInxS4+y photocatalysts had a similar crystal structure. With the increase of indium content, the absorption edges of ZnInxS4+y photocatalysts shifted to longer wavelength, their crystal sizes decreased firstly and then increased and the variation of the specific surface area and total pore volume was exactly opposite. Especially, when x=2.3, ZnIn2.3S4+y catalyst had smallest crystal size, largest specific surface area and total pore volume. Additionally, the morphology of ZnInxS4+y greatly depended on the contents of indium. The photocatalytic activity of ZnInxS4+y was evaluated by photocatalytic hydrogen production from water under visible light. The ZnIn2.3S4+y sample had the highest photocatalytic activity among these ZnInxS4+y photocatalysts and its hydrogen production rate was 363μmol/gh.
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