化工新型材料

化工新型材料 ›› 2025, Vol. 53 ›› Issue (6) : 209-213. DOI: 10.19817/j.cnki.issn1006-3536.2025.06.026

科学研究

磁性石墨烯基氧化锌纳米阵列异质光催化剂的制备与性能

李颖, 何春鹏, 朱忆仁, 聂学童

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Preparation and performance of magnetic graphene-based zinc oxide nano-array heterogeneous photocatalysts

Li Ying, He Chunpeng, Zhu Yiren, Nie Xuetong

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Received		Published
2024-05-14		2025-06-20
Issue Date	Revised Date
2025-06-17	2024-05-14

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摘要

采用简单的低温湿化学法制备了一种具有刺猬状形貌的磁性石墨烯基氧化锌纳米棒阵列(RGO-MFe₂O₄-ZnO NRAs)。采用X射线衍射(XRD)、透射电镜(TEM)、扫描电镜(SEM)和荧光光谱等手段对RGO-MFe₂O₄-ZnO NRAs进行了表征,并进行罗丹明B降解实验。结果表明:RGO-MFe₂O₄-ZnO NRAs由具有刺猬形状的ZnO NRAs垂直生长于磁性石墨烯纳米片表面(RGO-MFe₂O₄,M=Mn²⁺、Zn²⁺、Co²⁺、Ni²⁺、Mg²⁺、Ca²⁺、Cu²⁺)。RGO-ZnFe₂O₄-ZnO NRAs的光催化效果明显优于其他6种复合材料,虽然经过5次重复使用,但仍表现出90%左右的良好光催化效率,并且由于其磁性能可以通过外磁铁分离回收,具有良好的可重复使用性。此外,还提出了可见光照射下基于协同效应和光敏效应的光催化性能增强机理,可为促进石墨烯修饰的半导体纳米复合材料在各个领域的应用提高参考。

Abstract

A magnetic graphene-zinc oxide nanorod arrays (RGO-MFe₂O₄-ZnO NRAs) with hedgehog-like morphology were prepared by a simple low-temperature wet chemical method.The prepared materials were characterized by XRD,TEM,SEM and fluorescence spectroscopy,and rhodamine B degradation experiments were performed.The results showed that the nanocomposites consisted of ZnO NRAs with hedgehog shape grown vertically on the surface of magnetic graphene nanosheets (RGO-MFe₂O₄,M=Mn²⁺,Zn²⁺,Co²⁺,Ni²⁺,Mg²⁺,Ca²⁺,Cu²⁺).Various catalysts were synthesized to degrade rhodamine B.The results indicated that the photocatalytic effect of the RGO-ZnFe₂O₄-ZnO NRAs was significantly better than that of the other six composites,which exhibited a good photocatalytic efficiency of about 90% despite five reuses,and had good magnetic properties due to the fact that they could be recovered by separating them from the external magnet,demonstrating good reusability.In addition,this paper also proposed the enhancement mechanism of photocatalytic performance based on synergistic effect and photosensitive effect under visible light irradiation,providing references to promote the application of graphene-modified semiconductor nanocomposites in various fields.

关键词

磁性石墨烯 / 氧化锌纳米阵列 / 光催化 / 染料降解

Key words

magnetic graphene / ZnO NRAs / photocatalysis / dye degradation

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磁性石墨烯基氧化锌纳米阵列异质光催化剂的制备与性能[J]. 化工新型材料, 2025, 53(6): 209-213 DOI:10.19817/j.cnki.issn1006-3536.2025.06.026

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