Enhanced photoelectrochemical performance of TiO2 nanofiber arrays decorated with CdS nanoparticles via SILAR method

IF 0.9 4区物理与天体物理 Q4 PHYSICS, APPLIED

European Physical Journal-applied Physics Pub Date : 2021-02-01 DOI:10.1051/EPJAP/2021200249

J. Naceur, R. Ouertani, F. Jrad, S. Khamlich, W. Dimassi, R. Chtourou

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引用次数: 0

Abstract

In this paper, we report the photoelectrochemical performances of CdS nanoparticles (NPs) decorated TiO2 photoanodes. The TiO2 nanofiber arrays (NFAs) were fabricated into Titanium substrate by a hydrothermal method. Afterwards, the deposited TiO2 NFAs were decorated with CdS NPs by employing a successive ionic layer adsorption and reaction (SILAR) method. The obtained samples of CdS covered and uncovered TiO2 NFAs were characterized by X-ray diffraction, Scanning Electron Microscopy and UV-visible Diffuse Reflectance Spectroscopy. The size of the CdS nanoparticles increases with the number of SILAR cycles and leads to an additional broad absorption peak in the visible part of the spectrum. Consequently, the photo-electrochemical performance of the CdS decorated TiO2 was enhanced substantially resulting in a better electron-hole separation and transport. This enhancement has been discussed and assigned to a better sun light harvesting and an efficient charge transfer between the CdS nanoparticles and the TiO2 NFAs.

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利用SILAR方法增强CdS纳米粒子修饰TiO2纳米纤维阵列的光电化学性能

本文报道了CdS纳米粒子修饰TiO2光阳极的光电化学性能。采用水热法制备了二氧化钛纳米纤维阵列。然后，采用连续离子层吸附反应(SILAR)方法，用CdS NPs修饰沉积的TiO2 nfa。用x射线衍射、扫描电镜和紫外可见漫反射光谱对覆盖和未覆盖的CdS样品进行了表征。CdS纳米颗粒的尺寸随着SILAR循环次数的增加而增加，并在光谱的可见部分产生一个额外的宽吸收峰。结果表明，CdS修饰TiO2的光电电化学性能得到了显著提高，电子空穴分离和输运性能得到了改善。我们讨论了这种增强，并将其归因于更好的太阳光收集和CdS纳米颗粒与TiO2 nfa之间有效的电荷转移。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

European Physical Journal-applied Physics 物理-物理：应用

CiteScore

1.90

自引率

10.00%

发文量

审稿时长

1.9 months

期刊介绍： EPJ AP an international journal devoted to the promotion of the recent progresses in all fields of applied physics. The articles published in EPJ AP span the whole spectrum of applied physics research.