Fabrication of flexible PAN/Bi2WO6/BiOI heterojunction nanofiber and the property of photocatalytic degradation

IF 6.9 2区材料科学 Q2 CHEMISTRY, PHYSICAL Applied Surface Science Pub Date : 2024-12-31 DOI:10.1016/j.apsusc.2024.162266

Pingping Teng , Yinxiao Chen , Nan Lu , Chen Shi , Zhihai Liu , Zheng Zhu , Yang Zhang , Shuai Gao , Sivagunalan Sivanathan , Kang Li

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Abstract

This paper presents a novel flexible PAN/Bi₂WO₆/BiOI heterojunction nanofiber, fabricated through electrospinning, as an advanced photocatalyst for the degradation of pollutants. The PAN nanofibers serve a stable and reusable support for the Bi₂WO₆/BiOI heterojunctions, which were constructed using a combination of solvothermal and successive ionic layer adsorption and reaction (SILAR) methods. The separation efficiency of the photogenerated electron-hole pairs and photocatalytic degradation efficiency of Rhodamine B under visible light were significantly enhanced by the heterojunction structure. Comprehensive characterizations confirmed the successful formation of the heterostructure and its superior electron transfer capabilities. The study identified superoxide radicals (·O₂^-) and photogenerated holes (h⁺) as key contributors to the photocatalytic process. The optimized nanofiber exhibited a degradation rate constant of 6.529 × 10^-2min⁻¹, significantly outperforming its individual components, and maintained high activity over multiple reuse cycles. This research provides a promising approach for designing high-efficiency, recyclable photocatalytic materials with potential applications in environmental remediation.

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柔性PAN/Bi2WO6/BiOI异质结纳米纤维的制备及其光催化降解性能

本文介绍了一种新型柔性PAN/Bi2WO6/BiOI异质结纳米纤维，该纤维是一种用于降解污染物的先进光催化剂。PAN纳米纤维是一种稳定且可重复使用的Bi2WO6/BiOI异质结载体，该异质结采用溶剂热吸附和连续离子层吸附反应（SILAR）相结合的方法构建。异质结结构显著提高了光生电子-空穴对的分离效率和罗丹明B在可见光下的光催化降解效率。综合表征证实了异质结构的成功形成及其优越的电子转移能力。研究发现超氧自由基（·O2-）和光生空穴（h+）是光催化过程的关键贡献者。优化后的纳米纤维的降解速率常数为6.529 × 10-2min−1，明显优于其单个组分，并且在多次重复使用循环中保持较高的活性。该研究为设计高效、可回收的光催化材料提供了一条有前景的途径，并在环境修复中具有潜在的应用前景。

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文献相关原料

公司名称

产品信息

麦克林

bismuth nitrate pentahydrate (Bi(NO3)3·5H2O)

阿拉丁

sodium tungstate

阿拉丁

potassium iodide (KI)

来源期刊

Applied Surface Science 工程技术-材料科学：膜

CiteScore

12.50

自引率

7.50%

发文量

3393

审稿时长

67 days

期刊介绍： Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.