Abstract
Solar-driven photocatalytic water splitting is an ideal solution for clean and renewable fuels. The development of sustainable, low-cost, and efficient visible-light photocatalyst continues to be a serious challenge in this field. In this article, CdS−Ag3PO4 heteronanostructures (HNSs) were fabricated for the first time by a solvothermal and subsequent simple chemical reaction method. The as synthesized heterostructured photocatalysts were characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and UV–visible spectroscopy. Their photocatalytic hydrogen production rate was evaluated by using an aqueous solution containing 10% methanol under visible light (λ > 420 nm). The resultant CdS-Ag3PO4 HNSs exhibit a higher photocatalytic hydrogen evolution rate than that of CdS NWs under visible light irradiation. The apparent H2 generation rate of CdS-Ag3PO4 HNSs is ∼2 times higher than that of bare CdS nanowires (NWs). The results show that the specially formed heterojunctions between CdS NWs and Ag3PO4 NPs favor the separation of photogenerated electron-hole pairs, which in turn produced the improved photocatalytic hydrogen evolution rate.
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