Functionalized ZnO@TiO2 nanorod array film loaded with ZnIn(0.25)Cu(0.02)S(1.395) solid-solution: synthesis, characterization and enhanced visible light driven water splitting.
Functionalized ZnO@TiO2 nanorod array film loaded with ZnIn(0.25)Cu(0.02)S(1.395) solid-solution: synthesis, characterization and enhanced visible light driven water splitting.
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DOI：
10.1039/c5nr02127h
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发表时间：
2015-06
期刊：
影响因子：
6.7
通讯作者：
Ruosong Wang;Xiaoxue Xu;Yi Zhang;Zhimin Chang;Zaicheng Sun;W. Dong
中科院分区：
文献类型：
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作者：
Ruosong Wang;Xiaoxue Xu;Yi Zhang;Zhimin Chang;Zaicheng Sun;W. Dong
我们设计了一种新颖的半导体芯/层纳米结构的均匀ZnO@TiO2纳米棒阵列改性与ZnIn0.25Cu0.02S1.395固溶体的表面上通过一个简易的水热合成。这种新颖的纳米结构结合了所有组件的优点，满足光伏系统应用的要求。ZnO@TiO2纳米棒和多金属硫化物固溶体形成紧密的PN异质结，这对于有效的可见光吸收和快速的电荷载流子分离是非常有益的。纳米结构显示出更高的光电流和入射光子到电子转换效率（IPCE）下，没有偏置电位比Ag/AgCl电极。分析了纳米结构的界面和光电化学特性，揭示了电子和空穴传输的动力学过程。此外，光阳极测试显示了纳米结构从太阳能水分解的制氢能力。这些结果证实了ZnO和TiO 2可以被多金属硫化物敏化用于UV-Vis光驱动能量转换。重要的是，我们用于设计光电阳极的方法能够开发具有增强性能的微纳电子器件。
We have designed a novel semiconductor core/layer nanostructure of a uniform ZnO@TiO2 nanorod array modified with a ZnIn0.25Cu0.02S1.395 solid-solution on the surface via a facile hydrothermal synthesis. This novel nanostructure combines the merits of all components and meets the requirements of photovoltaic system application. An intimate PN heterojunction is formed from the ZnO@TiO2 nanorod and polymetallic sulphide solid-solution, which is remarkably beneficial for the effective visible light absorption and rapid charge carrier separation. The nanostructures exhibit higher photocurrent and incident photon to electron conversion efficiency (IPCE) under no bias potential versus the Ag/AgCl electrode. We also analyzed the interface and photoelectrochemical characteristics of the nanostructure and revealed the kinetic process of the electron and hole transmission. In addition, the photoanode test shows the hydrogen production capability of the nanostructures from solar water splitting. These results verified that the ZnO and TiO2 can be sensitized by the polymetallic sulfide for UV-Vis light driven energy conversion. Importantly, the approach we used to design the photoanode enables the development of micro-nano electronic devices with enhanced performance.