Abstract
The CuO/SnO 2 composites have been prepared by the simple co-precipitation method and further characterized by the XRD, FESEM and Raman spectroscopy. The photocatalytic H 2 production from acetic acid (HAc) solution over CuO/SnO 2 photocatalyst has been investigated at room temperature under UV irradiation. Effects of CuO loading, photocatalyst concentration, acetic acid concentration and pH on H 2 production have been systematically studied. Compared with pure SnO 2, the 33.3 mol%CuO/SnO 2 composite exhibited approximately twentyfold enhancement of H 2 production. The H 2 yield is about 0.66 mol-H 2/mol-HAc obtained under irradiation for prolonged time. The Langmuir-type model is applied to study the dependence of hydrogen production rate on HAc concentration. A possible mechanism for photocatalytic degradation of acetic acid over CuO/SnO 2 photocatalyst is proposed as well. Our results provide a method for pollutants removal with simultaneous hydrogen generation. Due to simple preparation, high H 2 production activity and low cost, the CuO/SnO 2 photocatalyst will find wide application in the coming future of hydrogen economy.
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