化工新型材料

化工新型材料 ›› 2025, Vol. 53 ›› Issue (9) : 256-261. DOI: 10.19817/j.cnki.issn1006-3536.2025.09.046

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Bi₂O₃/BiFeO₃异质结的制备及其光催化性能研究

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Preparation and photocatalytic properties of Bi₂O₃/BiFeO₃ heterojunction

Luo Gang¹, Li Zengpeng^1,2, Dai Jianfeng², He Chuan¹, Ma Hong¹, Jiang Xiaoming³

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Received		Published
2025-02-10		2025-09-20
Issue Date	Revised Date
2025-09-16	2025-02-10

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摘要

氧化铋(Bi₂O₃)是近年来研究较为广泛的窄隙半导体光催化剂,因其具有无毒、结构可调、氧化能力强、廉价易得等优点,在化学试剂、玻璃着色、压敏电阻、防腐涂料等领域具有广阔的发展前景。如何提高氧化铋光催化材料的光催化活性并深入阐明活性提高的机理成为研究的热点。利用常规的电化学沉积、水热法、固相法等掺杂改性难以提升氧化铋氧空位的迁移扩散效率以及高比表面积。基于此,采用同轴双喷嘴静电纺丝技术,在不同配比浓度下,制备了Bi₂O₃/BiFeO₃复合纳米异质结,利用X射线衍射分析、拉曼光谱、扫描电镜以及投射电镜等进一步分析了Bi₂O₃/BiFeO₃复合纳米异质的结构、形貌及光催化性能。结果表明:复合后短棒状结构的Bi₂O₃/BiFeO₃纳米异质结相比于纯相纤维状结构的Bi₂O₃、BiFeO₃纳米材料,其光催化降解甲基橙(MO)的性能得到了较大提升,可见光吸收范围得到了有效拓展,光生电荷的分离效率和其可见光利用率得到了提高,为后续设计铋基复合纳米光催化材料提供了指导和借鉴。

Abstract

Bismuth oxide (Bi₂O₃) is a narrow-gap semiconductor photocatalyst that has been widely studied in recent years.Because of its advantages such as non-toxic,adjustable structure,high oxidation capacity,cheap and easy to obtain,it has broad development prospects in the fields of chemical reagents,glass coloring,varistor and anticorrosive coatings.How to improve the photocatalytic activity of bismuth oxide photocatalytic materials and further elucidate the mechanism of the increase in activity have become the focus of research.It is difficult to improve the migration and diffusion efficiency and high specific surface area of the oxygen vacancies in bismuth oxide by conventional electrochemical deposition,hydrothermal method and solid phase method.In view of this,in this paper,Bi₂O₃/BiFeO₃ composite nano-heterojunctions were prepared by coaxial dual-nozzle electrospinning technology at different ratios and concentrations.The structure,morphology and photocatalytic properties of Bi₂O₃/BiFeO₃ composite nano-heterojunctions were further analyzed by Raman spectroscopy,X-ray diffractometer (XRD),scanning electron microscope (SEM),transmission electron microscope (TEM) and other characterization instruments.The results showed that the photocatalytic degradation for methyl orange (MO) of Bi₂O₃/BiFeO₃ nano-heterojunctions with short rod-like structure was greatly improved,and the visible light absorption range was effectively expanded compared with pure phase fibrous Bi₂O₃ and BiFeO₃ nanomaterials.The separation efficiency of photogenerated charge and its utilization of visible light were improved,providing guidance and reference for the subsequent design of bismuth-based nanocomposite photocatalytic materials.

关键词

半导体催化剂 / 氧化铋 / 光催化性能 / 异质结

Key words

semiconductor catalyst / bismuth oxide / photocatalytic performance / heterojunction

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Bi₂O₃/BiFeO₃异质结的制备及其光催化性能研究[J]. 化工新型材料, 2025, 53(9): 256-261 DOI:10.19817/j.cnki.issn1006-3536.2025.09.046

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