Abstract
Novel Ag/CdLa2S4 catalysts with different weight percents of Ag were synthesized by a simple hydrothermal method combined with photo-reduction process, and the obtained Ag/CdLa2S4 composites were characterized by various techniques. The activities of as-prepared samples were evaluated by the photo-degradation of methyl orange (MO) and photocatalytic H2 evolution under visible light (λ>400nm) irradiation. The results have shown that there is nearly no change in the crystal structure of CdLa2S4 after the loading of Ag nanoparticles, but Ag content in Ag/CdLa2S4 composites played an important role towards the photocatalytic activities of Ag/CdLa2S4 catalysts and 3.18% Ag/CdLa2S4 possessed the best photocatalytic properties. The photo-degradation of MO and hydrogen evolution rate of 3.18% Ag/CdLa2S4 were about 6.7 and 2.0 times than that of pure CdLa2S4, respectively, and the mechanism of activity enhancement was discussed.
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