Rhombic dodecahedral Cu2O/Ag-3D Fe3O4 micro-flower composites for water purification under visible light irradiation

被引：22

作者：

Wu, Tong ^{[1
,2
]}

Zheng, Hui ^{[1
,2
]}

Kou, Yichuan ^{[1
,2
]}

Jin, Shilei ^{[1
,2
]}

Jiang, Yuhong ^{[1
,2
]}

Gao, Ming ^{[1
,2
]}

Chen, Lei ^{[1
,2
]}

Kadasala, Naveen Reddy ^{[3
]}

Liu, Yang ^{[1
,2
]}

机构：

[1] Jilin Normal Univ, Minist Educ, Key Lab Funct Mat Phys & Chem, Changchun 130103, Peoples R China

[2] Jilin Normal Univ, Coll Phys, Siping 136000, Peoples R China

[3] Towson Univ, Dept Chem, Towson, MD 21252 USA

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2021年 / 858卷

基金：

中国国家自然科学基金;

关键词：

Fe3O4/Cu2O/Ag composites; Magnetic; Methyl orange; Visible light-active photocatalysts; Recyclability; ENHANCED PHOTOCATALYTIC PERFORMANCE; NANOSTRUCTURES; NANOPARTICLES; AU; MICROSTRUCTURES; NANOCOMPOSITE; NANOCRYSTALS; REDUCTION; MECHANISM; RESONANCE;

D O I：

10.1016/j.jallcom.2020.157698

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this study, 3D Fe3O4 micro-flowers were synthesized by the self-assembly approach, then rhombic dodecahedral Cu2O was successfully loaded onto their surface by wet chemical method. Ag nanocrystals were reduced in situ on the surface of Fe3O4/Cu2O composites to prepare novel Fe3O4/Cu2O/Ag composites. The composites were characterized by SEM, TEM, XRD, XPS, VSM and UV-Vis diffuse reflectance spectroscopy. The effect of Ag nanocrystals on the photocatalytic performance of the Fe3O4/Cu2O composites was investigated by the degradation of methyl orange under visible light irradiation, and the Fe3O4/Cu2O/Ag composites showed higher photocatalytic efficiency than the Fe3O4/Cu2O composites. Photoelectrochemical and PL measurements were carried out to investigate the synergistic effect between the semiconductors and Ag nanocrystals and it was confirmed that the Fe3O4/Cu2O/Ag composites effectively inhibited the recombination of electron-hole pairs, thus improving the photocatalytic activity. The fact that the Fe3O4/Cu2O/Ag composites could be magnetically recycled and that they retained more than 90% of their original activity after six repeated experiments indicates, that they show great potential for wastewater treatment applications. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：7

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