Synthesis of novel AuPd nanoparticles decorated one-dimensional ZnO nanorod arrays with enhanced photoelectrochemical water splitting activity

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• 作者：Yan Lu^a ; ^b ; Junlong Zhang^b ; Lei Ge^a ; ^b ; ^{gelei08@sina.com" class="auth_mail" title="E-mail the corresponding author} ; Changcun Han^b ; Ping Qiu^b ; Siman Fang^b
• 关键词：AuPd alloy nanoparticles ; ZnO nanorod arrays ; Photocurrent density ; Photocatalyst
• 刊名：Journal of Colloid and Interface Science
• 出版年：2016
• 出版时间：1 December 2016
• 年：2016
• 卷：483
• 期：Complete
• 页码：146-153
• 全文大小：2410 K

文摘

The vertically aligned one-dimensional (1D) ZnO nanorod arrays decorated with AuPd alloy nanoparticles have been synthesized with ZnO nanorod arrays as template via a mild hydrothermal method. In this work, the as-prepared AuPd/ZnO nanorod arrays demonstrated high light-harvesting efficiency. The microstructures, morphologies and chemical properties of the obtained AuPd/ZnO composite photocatalyst were investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), UV–vis diffuse reflectance spectra (DRS) and X-ray photoelectron spectroscopy (XPS). The photoelectrochemical (PEC) performances of as-obtained AuPd/ZnO nanorod arrays were examined, and the photocurrent density was up to 0.98 mA cm⁻² at 0.787 V versus Ag/AgCl, which was about 2.4 times higher than the pure ZnO sample. A possible photocatalytic mechanism of the AuPd/ZnO hybrid nanostructures under the simulated sunlight irradiation was proposed to guide further improvement of other desirable materials. According to the above experiment results, it can be clearly found that AuPd/ZnO composite nanorod arrays showed excellent PEC performance and had promising applications in the utilization of solar energy.