Morphological properties of photoanodes are crucial for improving their photoelectrochemical (PEC) performance. In this study, we fabricated bismuth vanadate (BiVO₄) nanoparticles (NPs) with an optimal size of ∼10 nm, as well as nanowires composed of NPs on anodized tungsten trioxide (WO₃) nanocoral structures. The linked BiVO₄ NPs were decorated by spin-coating, with the amount of the BiVO₄ precursor being controlled. Subsequently, the concentrations of Bi and V in the BiVO₄ precursor were determined. An optimized concentration of 0.3 M Bi and V for the linked BiVO₄ NPs/WO₃ nanocoral heterostructure led to enhanced photocurrent density and hydrogen gas-production compared to those of the pristine WO₃ nanocorals, yielding results that were 2.4 times higher. In particular, the incident photon-to-current conversion efficiency value at 410 nm improved by 8.3 times, as the linked BiVO₄ NPs attained efficient absorbance of visible light and a sufficient electron transfer pathway.

中文翻译：

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通过连接阳极 WO3 纳米珊瑚结构上的 BiVO4 纳米颗粒增强光电化学产氢

光阳极的形态特性对于提高其光电化学（PEC）性能至关重要。在这项研究中，我们制造了最佳尺寸为~10 nm的钒酸铋（BiVO ₄）纳米颗粒（NP），以及由阳极氧化三氧化钨（WO ₃）纳米珊瑚结构上的纳米颗粒组成的纳米线。连接的BiVO ₄ NPs通过旋涂进行修饰，并控制BiVO ₄前体的量。随后，测定BiVO ₄前体中Bi和V的浓度。_{与原始WO 3纳米珊瑚相比，连接的BiVO 4} NPs/WO ₃纳米珊瑚异质结构的0.3 M Bi和V的优化浓度导致光电流密度和氢气产量增强，产生的结果高出2.4倍。_{特别是，由于连接的BiVO 4} NPs获得了有效的可见光吸收和足够的电子转移路径，410 nm处的入射光子到电流的转换效率值提高了8.3倍。