Morphology modulation and photo-Fenton degradation of RhB properties in spinel-structured ZnFe2O4 nanocrystals

被引：0
|
作者：
Li Z. [1 ]
Wei Z. [1 ]
Li C. [1 ]
Han M. [1 ]
Wang Q. [1 ]
Zhao Y. [1 ]
机构：
[1] State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, School of Science, Lanzhou University of Technology, Lanzhou
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2024年 / 41卷 / 02期
基金：
中国国家自然科学基金;
关键词：
dye RhB; photo-Fenton; photoelectrochemical properties; shape control; ZnFe[!sub]2[!/sub]O[!sub]4[!/sub;
D O I：
10.13801/j.cnki.fhclxb.20230627.001
中图分类号：
学科分类号：
摘要：
The shortage of water resources and the increase of water demand for human production and life have made the topic of wastewater purification and treatment hot. The advanced oxidation process has become a proven method to treat wastewater because it is efficient, environmentally friendly and free of secondary pollution. The most representative ones are photocatalytic technology and Fenton technology. Three different morphologies of ZnFe2O4 nanocrystals, namely microspherical (ZFO-1), hollow spherical (ZFO-2) and orthohexagonal (ZFO-3), were prepared by hydrothermal and calcination methods by adjusting the process parameters. The microstructure, morphology, elemental composition and photoelectrochemical properties of the samples were characterized by XRD, SEM, HRTEM, UV-vis, electrochemical impedance spectroscopy (EIS) and transient photocurrent response tests. Furthermore, the ZnFe2O4 nanocrystal photo-Fenton properties were derived from the degradation of rhodamine B (RhB). The results show that all three prepared ZnFe2O4 nanocrystals have cubic spinel structure and good crystallinity. ZFO-2 exhibits excellent visible light absorption and the narrowest band gap with red-shift phenomenon. EIS tests show that ZFO-2 has the lowest internal resistance to transfer and the highest transient photocurrent, with excellent migration and separation of photogenerated carriers. The photo-Fenton degradation efficiencies of ZFO-1, ZFO-2 and ZFO-3 catalysts are 88.2%, 97.6% and 48.1% in order, indicating good degradation performance. The comprehensive obtained, ZFO-2 has excellent photodegradation performance. And the possible catalytic mechanism of photo-Fenton degradation of RhB was discussed. © 2024 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.
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页码：795 / 803
页数：8
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