Preparation and photocatalytic properties of WSe2/BiVO4 p-n heterojunction photocatalytic materials

IF 3.4 3区化学 Q2 CHEMISTRY, PHYSICAL Catalysis Communications Pub Date : 2024-02-01 DOI:10.1016/j.catcom.2024.106857

Zhihua Xia , Xingang Wang , Kai Liu , Haoyun Wang , Yingqi Wang , Wenxin Lu , Deyi Jiang , Haq Nawaz Abbasi , Zechong Guo , Wuxiang Zhang , Hongliang Dai

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Abstract

The 2D transition metal WSe₂, a strong photocatalyst, was combined with BiVO₄ to create a p-n heterojunction photocatalyst using a hydrothermal process. The resulting 10% WSe₂/BiVO₄ (in the synthesized material, the mass ratio of WSe₂ to BiVO₄ is 1:10) composite showed impressive 94.5% efficiency in Methylene Blue (MB) degradation under visible light. Even after eight cycles, it maintained a 72% degradation rate, demonstrating robust photocatalytic stability. Experiments, including ·O²⁻ and h⁺ capture and ESR analysis, revealed their vital roles in photocatalytic degradation. The exceptional performance of WSe₂/BiVO₄ is attributed to the internal electric field formed between WSe₂ and BiVO₄, enhancing carrier mobility.

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WSe2/BiVO4 p-n 异质结光催化材料的制备与光催化性能

利用水热法将二维过渡金属 WSe2（一种强光催化剂）与 BiVO4 结合在一起，制造出一种 p-n 异质结光催化剂。所得到的 10% WSe2/BiVO4 （合成材料中 WSe2 与 BiVO4 的质量比为 1:10）复合材料在可见光下降解二甲苯蓝（MB）的效率高达 94.5%，令人印象深刻。即使在 8 个循环后，它仍能保持 72% 的降解率，显示出强大的光催化稳定性。包括 -O2- 和 h+ 捕获和 ESR 分析在内的实验揭示了它们在光催化降解中的重要作用。WSe2/BiVO4 的优异性能归功于 WSe2 和 BiVO4 之间形成的内部电场，从而提高了载流子的迁移率。

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来源期刊

Catalysis Communications 化学-物理化学

CiteScore

6.20

自引率

2.70%

发文量

183

审稿时长

46 days

期刊介绍： Catalysis Communications aims to provide rapid publication of significant, novel, and timely research results homogeneous, heterogeneous, and enzymatic catalysis.