Abstract
In our work, ZnO/CdS hybrid photocatalysts were prepared by a simple and reproducible photodeposition method and the content of deposited CdS can be varied by irradiation time. The ZnO/CdS photocatalysts showed good photocatalytic H2 evolution activities in aqueous Na2S + Na2SO3 solution. When the content of CdS loading increased to 22.91% after an irradiation time of 120 min (ZnO/CdS-T120), the highest photocatalytic activity was obtained (1725 μmol g–1 h–1), which was about 9.2 and 34.5 times than that of single ZnO and CdS photocatalysts. At the same time, ZnO/CdS-T120 presented stable photocatalytic ability (no noticeable degradation of H2 evolution in four repeated runs in 48 h). Compared with other reported H2 evolution photocatalysts, ZnO/CdS-T120 showed higher H2 evolution activity and stability. Additionally, ZnO/CdS-T120 has a good natural sunlight driven H2 evolution ability (2077 μmol g–1 h–1). ZnS was proved to generate on ZnO/CdS-T120 surface in process of photocatalytic H2 evolution based o...
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