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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Fabrication of Cd0.5Zn0.5S nanoparticles decorated TiO2 nanotube arrays electrode and its enhanced photoelectrocatalytic performance
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Fabrication of Cd0.5Zn0.5S nanoparticles decorated TiO2 nanotube arrays electrode and its enhanced photoelectrocatalytic performance

机译：Cd0.5Zn0.5S纳米粒子修饰TiO2纳米管阵列电极的制备及其光电催化性能

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摘要

Cd0.5Zn0.5S nanoparticles modified TiO2 nanotube arrays composite electrodes (Cd0.5Zn0.5S/TiO2 NTAs) were successfully synthesized by the combination of electrochemical oxidation and hydrothermal process under various thiourea concentrations. The as-prepared electrodes were systematically characterized by field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and UV-Vis diffuse reflectance absorption spectra techniques. The influence of thiourea concentrations on the morphology structure, photoelectrochemical properties, and hydrogen production of Cd0.5Zn0.5S/TiO2 NTAs electrodes was systematically investigated. The Cd0.5Zn0.5S/TiO2 NTAs electrode fabricated at 8 mM thiourea concentration exhibits the highest hydrogen production rate of 523.1 mu mol/ (h.cm(2)) and the maximum photocurrent density of 26.73 mA/cm(2) under visible light illumination. The corresponding apparent quantum efficiency (QE) and visible-photoconversion efficiency are 55.2% and 11.97%, respectively. Electrochemical impedance spectroscopy (EIS) analysis of Cd0.5Zn0.5S/TiO2 NTAs electrode further demonstrates the enhanced photoelectrochemical performance, which can be attributed to the favorable microstructure and enhanced charge transfer. (C) 2016 Elsevier B.V. All rights reserved.
机译：通过电化学氧化和水热工艺在不同的硫脲浓度下成功合成了Cd0.5Zn0.5S纳米粒子修饰的TiO2纳米管阵列复合电极（Cd0.5Zn0.5S / TiO2 NTAs）。通过场发射扫描电子显微镜（FE-SEM），透射电子显微镜（TEM），能量色散X射线光谱（EDS），X射线衍射（XRD），X射线对所制备的电极进行系统表征光电子能谱（XPS）和UV-Vis漫反射吸收光谱技术。系统研究了硫脲浓度对Cd0.5Zn0.5S / TiO2 NTAs电极的形态结构，光电化学性质和产氢的影响。在8 mM硫脲浓度下制备的Cd0.5Zn0.5S / TiO2 NTAs电极在可见光下具有最高的氢气产生速率523.1μmol /（h.cm（2））和最大光电流密度26.73 mA / cm（2）照明。相应的表观量子效率（QE）和可见光转换效率分别为55.2％和11.97％。 Cd0.5Zn0.5S / TiO2 NTAs电极的电化学阻抗谱（EIS）分析进一步证明了增强的光电化学性能，这可以归因于良好的微观结构和增强的电荷转移。 （C）2016 Elsevier B.V.保留所有权利。

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