构建Z型BiVO<sub>4</sub>/BiOCl@C异质结提高光电化学性能

李佳欣; 袁豪; 张文杰; 朱瑞杰; 焦正波

doi:10.1007/s12613-022-2481-9

Volume 29 Issue 11

Nov. 2022

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文章导航 > 矿物冶金与材料学报（英文） > 2022 > 29(11): 1971-1980

Jiaxin Li, Hao Yuan, Wenjie Zhang, Ruijie Zhu, and Zhengbo Jiao, Construction of BiVO₄/BiOCl@C Z-scheme heterojunction for enhanced photoelectrochemical performance, Int. J. Miner. Metall. Mater., 29(2022), No. 11, pp. 1971-1980. https://doi.org/10.1007/s12613-022-2481-9

Cite this article as:

Jiaxin Li, Hao Yuan, Wenjie Zhang, Ruijie Zhu, and Zhengbo Jiao, Construction of BiVO4/BiOCl@C Z-scheme heterojunction for enhanced photoelectrochemical performance, Int. J. Miner. Metall. Mater., 29(2022), No. 11, pp. 1971-1980. https://doi.org/10.1007/s12613-022-2481-9

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构建Z型BiVO₄/BiOCl@C异质结提高光电化学性能

青岛大学材料科学与工程学院能源与环境材料研究院，青岛 266071，中国

通讯作者:
焦正波 E-mail: jiaozhb@qdu.edu.cn

文章亮点

（1）通过简单的固溶体干燥煅烧法制备光催化性能优异的光电阳极。

（2）利用空心碳球作为导电介质，加速载流子的迁移速率。

（3）构建Z型异质结，减少电子–空穴重组率，提高BiVO₄光电催化性能。

中文摘要

利用半导体光催化剂分解水是目前将太阳能转化为化学燃料的有效方法之一。然而，大多数氧化物半导体材料由于可见光利用率较低以及光激发电子-空穴对复合速率高而限制了其实际应用范围。因此，复合光催化剂通过提高电荷转移效率来改善单组分光催化剂的光催化性能。本文旨在开发一种光电催化性能优异的BiVO₄基Z型异质结作为光催化分解水体系中的光阳极，以此来提高光电分解水的效率。在可见光照射下对制备的一系列BiVO₄基光催化剂进行光电化学性能测试，结果显示Mo,W:BiVO₄/BiOCl@C构建的Z型异质结的性能最优异。其光电流密度和入射光子-电子转换效率（IPCE）分别是纯BiVO₄的5.4倍和9.0倍。通过自由基捕获实验可知，光电化学性能的提高归因于Z型异质结的构建，从而增强了可见光吸收范围并降低了光生载流子的复合率。这项工作为光电化学（PEC）水裂解的应用提供了一种有效的构造Z型光电极的策略。

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Research Article

Construction of BiVO₄/BiOCl@C Z-scheme heterojunction for enhanced photoelectrochemical performance

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Abstract

Abstract

A Z-scheme heterostructure of Mo, W co-doped BiVO₄ (Mo,W:BVO/BiOCl@C) was fabricated by a simple solid solution drying and calcination (SSDC) method. The heterostructure was characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS), etc. Under visible light irradiation, Mo,W:BVO/BiOCl@C heterostructure exhibits excellent photoelectrochemical capability compared with other as-prepared samples. The photocurrent density and the incident photon-to-electron conversion efficiency (IPCE) are about 5.4 and 9.0 times higher than those of pure BiVO₄, respectively. The enhancement of the photoelectrochemical performance can be attributed to the construct of Z-scheme system, which is deduced from the radical trapping experiments. The Mo,W:BVO/BiOCl@C Z-scheme heterojunction enhances the visible-light absorption and reduces the recombination rate of charge carriers. This work provides an effective strategy to construct Z-scheme photoelectrodes for the application of photoelectrochemical water splitting.
- photoelectrochemical;
- bismuth vanadate;
- BiOCl;
- Z-scheme;
- carbon

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References

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构建Z型BiVO₄/BiOCl@C异质结提高光电化学性能

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Construction of BiVO₄/BiOCl@C Z-scheme heterojunction for enhanced photoelectrochemical performance

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构建Z型BiVO4/BiOCl@C异质结提高光电化学性能

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中文摘要

Construction of BiVO4/BiOCl@C Z-scheme heterojunction for enhanced photoelectrochemical performance

Abstract

References

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构建Z型BiVO₄/BiOCl@C异质结提高光电化学性能

Construction of BiVO₄/BiOCl@C Z-scheme heterojunction for enhanced photoelectrochemical performance