光电流
纳米棒
异质结
材料科学
线性扫描伏安法
介电谱
结晶度
分解水
基质(水族馆)
化学工程
带隙
能量转换效率
光催化
电流密度
纳米技术
电极
光电子学
循环伏安法
分析化学(期刊)
电化学
化学
复合材料
地质学
工程类
物理化学
催化作用
物理
海洋学
量子力学
生物化学
色谱法
作者
Fatih Tezcan,Adil Ahmad,Gurbet Yerlikaya,. Zia-ur-Rehman,Halime Paksoy,Gülfeza Kardaş
出处
期刊:Fuel
[Elsevier]
日期:2022-09-01
卷期号:324: 124477-124477
被引量:18
标识
DOI:10.1016/j.fuel.2022.124477
摘要
In this research work, α-Fe2O3/Bi2S3 heterojunction photoelectrodes for improved photoelectrochemical water splitting have been successfully fabricated on FTO substrate by applying hydrothermal and solvothermal approaches. A seed layer approach is also applied before the solvothermal step for the homogeneous distribution of Bi2S3 over α-Fe2O3 nanorods to obtain a uniform heterojunction. The physicochemical and optical techniques results of α-Fe2O3/Bi2S3 indicate high crystallinity, presence of two distant phases with different bandgap positions. Linear sweep voltammetry (LSV) results indicate that the optimized α-Fe2O3/Bi2S3 photoanode performs a maximum photocurrent density of 2.550 mA cm−2 at 1.23 VRHE which is almost 20 times higher than pristine α-Fe2O3 (0.123 mA cm−2 at 1.23 V RHE). Electrochemical Impedance Spectroscopy (EIS) entirely shows α-Fe2O3/Bi2S3.6 h is the lowest Rp (180.9 Ω cm2) compare to pristine Fe2O3 (5810 Ω cm2), indicating enhanced photocatalytic performance on OER and S2-/S22- cycle followed under 100 mW cm−2 solar irradiation. This significant upsurge in the photocurrent density and applied biased photon-to-current conversion efficiency shown by the heterojunction is attributed to the improved light-harvesting efficiency, enhanced conductivity, and effective charge separation at the α-Fe2O3/Bi2S3 interface.
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