Abstract
Photocatalytic hydrogen production has been recognized as one of the most desirable approaches to overcome the worldwide energy and environmental issues. Here, novel sea urchin-like Zn0.5Cd0.5S and mesoporous TiO2 (M-TiO2) are designed, and a series of crown-like Zn0.5Cd0.5S/M-TiO2 composites with different contents of M-TiO2 are synthesized by hydrothermal method. The optimum hydrogen production rate of composites reaches 180.4 mmolh−1g−1 with the AQE up to 48.9% at 420 nm, which is 3.5 and 216 times that of pure Zn0.5Cd0.5S and the M-TiO2, respectively. The outstanding performance of optimized Zn0.5Cd0.5S/M-TiO2 composite prepared in this work exceeds most reported Cd-S-based catalysts. The improvement on the photocatalytic performance of composites is mainly due to the enlarged specific surface area, the exposure of more active sites, and the enhancement of the electron-hole separation efficiency.
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