Abstract

Nanostructured Ag 2S/CdS were synthesized by a two-step precipitation method, and characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), and UV–Vis absorption spectra. With Ag 2S highly dispersed in the CdS nanostructures, the photoactivity was evaluated by hydrogen evolution from aqueous solution containing Na 2S/Na 2SO 3 as a hole scavenger under simulated solar light (AM1.5). When the concentration of Ag 2S was 5% by weight, Ag 2S/CdS showed the highest photocatalytic activity for hydrogen evolution, with the solar-hydrogen energy conversion efficiency approximately 0.7%. We investigated the effect of highly dispersed Ag 2S on the photoactivity.

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