Photodecomposition of H_2S to H_2 over Cu~(2+) doped Cd_(0.3)ln_2S_4-Zn_(0.7)In_2S_4 Composite Photocatalysts

摘要

The Cd0.3In2S4-Zn0.7In2S4 composite photocatalyst doped with transition metal Cu~(2+) has been synthesized by hydrothermal method. The physical and photophysical properties of the above-prepared photocatalysts were characterized by XRD, UV-Vis, SPS, SEM and XPS. The XRD peaks of Cu2+ doped Cd0.3In2S4-Zn0.7In2S4 were almost the same as the crystal structure of Cd0.3In2S4-Zn0.7In2S4. The UV-Vis absorption edge of Cu2+ doped Cd_(0.3)ln_2S_4-Zn_(0.7)In_2S_4 shifted monotonically to long wavelength. The photocatalytic activity of Cu2+ doped photocatalysts had been improved as a result of the enhancement of the charge separation efficiency. The results indicated that the photocatalyst of Cu2+(2wt %)-Cd0.3In2S4/Zn0.7In2S4 exhibited the highest photocatalytic activity with the rate of H2 evolution to be 1141 ìmol/(h?g) under visible light irradiation.