光电流
纳米片
化学浴沉积
铋
材料科学
涂层
化学工程
基质(水族馆)
沉积(地质)
离子
纳米技术
薄膜
光电子学
化学
有机化学
古生物学
冶金
工程类
地质学
海洋学
生物
沉积物
作者
Mohammad Karimi Sahnesarayi,H. Sarpoolaky,S. Rastegari
标识
DOI:10.1016/j.ijhydene.2021.12.073
摘要
In this work, vertically aligned β-Bi2O3 nanosheet arrays are deposited on FTO using a simple, cost-effective, low-temperature, and easy-tunable technique called chemical bath deposition. Coatings were deposited through selective correlation of varying bismuth ion concentrations at fixed pH and, also, a fixed bismuth ion concentration at different pH values to optimize their structure, morphology, and optical properties. With an increase in bismuth precursor concentration from 0.008 M to 0.5 M, a more crystallized and compact coating with finer nanosheets was formed. Low pH values tended to result in either no coating or a coating composed of discrete particles. As the pH increased to the optimal level, a thicker and more compact coating with a morphology made of thicker and wider nanosheets was formed. Further increase in pH led to a non-uniform coating composed of small and large nanosheets that could not cover the entire surface of the substrate. The optimized photoelectrode exhibited a maximum photocurrent density of 470 μA/cm2 at 1.23 VRHE under 100 mW/cm2 simulated sunlight, which is among the top recorded values of Bi2O3 photoelectrodes.
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