Synthesis of uniform ZnO/ZnS/CdS nanorod films with ion-exchange approach and photoelectrochemical performances
Synthesis of uniform ZnO/ZnS/CdS nanorod films with ion-exchange approach and photoelectrochemical performances
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离子交换法合成均匀ZnO/ZnS/CdS纳米棒薄膜及其光电化学性能
DOI：
10.1016/j.ijhydene.2013.03.056
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发表时间：
2013-09-30
影响因子：
7.2
通讯作者：
Guo, Liejin
中科院分区：
文献类型：
--
作者：
Jiang, Jiangang;Wang, Meng;Guo, Liejin
采用两步离子交换法制备了均匀的ZnO/ZnS/CDS纳米棒薄膜。用X射线衍射仪、拉曼光谱、扫描电子显微镜、透射电子显微镜、能量色散X射线探测器和紫外可见光谱技术对薄膜的晶体结构、形貌、成分和光学性能进行了表征。结果表明，氧化锌纳米棒阵列可以作为牺牲模板合成均匀的硫化锌薄膜，并通过简单的离子交换方法进一步转化为硫化镉。通过改变反应温度，可以很容易地调节薄膜中的硫化镉含量。高分辨率的电子显微镜图像可以观察到核壳之间的紧密接触，降低了晶界势垒，从而促进了光生电荷在不同相间的转移。本实验将纳米棒薄膜用于光电化学(PEC)制氢。并且发现，在70℃(第一步)和100℃(第二步)下制备的薄膜具有最大的光电流密度和光转换效率。版权所有(C)2013，氢能源出版有限责任公司。爱思唯尔有限公司出版。保留所有权利。
The uniform ZnO/ZnS/CdS core-shell nanorod film was synthesized by a two-step ion-exchange method. The crystal structure, morphology, composition and optical property of as-prepared films were characterized by X-ray diffraction (XRD), Raman, Scanning electron microscope (SEM), Transmission electron microscope (TEM), Energy dispersive X-ray Detector (EDX) and UV-vis techniques. The results showed that the ZnO nanorod arrays can be used as sacrificial templates to synthesize uniform ZnS layer and further transform into CdS by simple ion-exchange approach. The CdS content in the films can be adjusted easily by changing the reaction temperature. The intimate contact between core and shell can be observed by high-resolution TEM image, which decrease the crystal boundary potential barrier and then facilitate the photogenerated charges transfer between the different phases. In this experiment, the ZnO/ZnS/CdS nanorod films were used in the photoelectrochemical (PEC) hydrogen production. And it is found that the film prepared at 70 degrees C (first step) and 100 degrees C (second step) gives a maximum photocurrent density and photo conversion efficiency. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.