光电流
化学浴沉积
分解水
可见光谱
纳米棒
光电化学
材料科学
纳米技术
纳米结构
带隙
拉曼光谱
半导体
扫描电子显微镜
光电子学
光催化
化学工程
化学
电化学
催化作用
光学
电极
复合材料
物理化学
工程类
物理
生物化学
作者
Avinash Rokade,Ganesh K. Rahane,Aleksandar Živković,Swati Rahane,Hemant S. Tarkas,K. Hareesh,Nora H. de Leeuw,Shrikrishna D. Sartale,Nelson Y. Dzade,Sandesh Jadkar,Sachin R. Rondiya
出处
期刊:Langmuir
[American Chemical Society]
日期:2024-03-22
卷期号:40 (13): 6884-6897
被引量:8
标识
DOI:10.1021/acs.langmuir.3c03817
摘要
CdS, characterized by its comparatively narrow energy band gap (∼2.4 eV), is an appropriate material for prospective use as a photoanode in photoelectrochemical water splitting. Regrettably, it encounters several obstacles for practical and large-scale applications, including issues such as bulk carrier recombination and diminished conductivity. Here, we have tried to address these challenges by fabricating a novel photoelectrode (ZnO/CdS) composed of one-dimensional ZnO nanorods (NRs) decorated with two-dimensional CdS nanosheets (NSs). A facile two-step chemical method comprising electrodeposition along with chemical bath deposition is employed to synthesize the ZnO NRs, CdS NSs, and ZnO/CdS nanostructures. The prepared nanostructures have been investigated by UV–visible absorption spectroscopy, X-ray diffraction, Raman spectroscopy, transmission electron microscopy (TEM), and scanning electron microscopy. The fabricated ZnO/CdS nanostructures have shown enhanced photoelectrochemical properties due to the improvement of the semiconductor junction surface area and thereby enhanced visible light absorption. The incorporation of CdS NSs has been further found to promote the rate of the charge separation and transfer process. Subsequently, the fabricated ZnO/CdS photoelectrodes achieved a photocurrent conversion efficiency 3 times higher than that of a planar ZnO NR photoanode and showed excellent performance under visible light irradiation. The highest applied bias photon-to-current conversion efficiency (% ABPE) of about ∼0.63% has been obtained for the sample with thicker CdS NSs on ZnO NRs with a photocurrent density of ∼1.87 mA/cm2 under AM 1.5 G illumination. The newly synthesized nanostructures further demonstrate that the full photovoltaic capacity of nanomaterials is yet to be exhausted.
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