纳米片
钒酸铋
纳米结构
兴奋剂
光电流
材料科学
分解水
可见光谱
载流子
带隙
纳米技术
化学工程
光电子学
光催化
化学
生物化学
催化作用
工程类
作者
Bahareh Feizi Mohazzab,Anise Akhundi,Kourosh Rahimi,Babak Jaleh,A.Z. Moshfegh
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2022-09-20
卷期号:5 (10): 12283-12296
被引量:4
标识
DOI:10.1021/acsaem.2c01839
摘要
Here, a solution combustion method was employed to construct a photoanode based on bismuth vanadate (BV) composition. To curtail the fast charge recombination, phosphorus-doped g-C3N4 nanosheets (PCNS) in combination with BV are considered a potential approach. The prepared solution combustion facilitated the formation of a BiVO4-PCNS (BV-PCNS) hybrid photoanode with worm-like morphology with a simple setup. The weight ratio of PCNS/BiVO4 and the loading volume/cm2 were optimized to determine the most efficient photoanode. The highest photocurrent density of 0.5 mA/cm2 at 1.23 V vs reversible hydrogen electrode (RHE) under 1 sun illumination was achieved for the hybrid nanostructure at 2 wt % of PCNS/BiVO4 and 50 μL loading volume/cm2 (BV-PCNS2-50), which is fivefold higher than that of the BV control sample. It was found that the presence of PCNS resulted in the formation of mid-gap states to enhance the visible light activity of BV-PCNS. A possible charge transfer mechanism is proposed under photoirradiation to show how the optimized deposition parameters influence the reduction of the electron–hole recombination rate of the photoanode and thus improve its photoelectrochemical water splitting performance. Density functional theory calculations were also performed to find the band alignment type formed across the BV/PCNS interface and to suggest the charge transfer mechanism in the BV/PCNS interface.
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