Fabrication of magnetically separable NiFe2O4/Bi24O31Br10 nanocomposites and excellent photocatalytic performance under visible light irradiation

被引：115
作者：
He, Zuming [1 ,2 ]
Xia, Yongmei [3 ]
Su, Jiangbin [1 ,2 ]
Tang, Bin [1 ,2 ]
机构：
[1] Changzhou Univ, Huaide Sch, Jingjiang 214500, Peoples R China
[2] Changzhou Univ, Sch Math & Phys, Changzhou 213164, Peoples R China
[3] Jiangsu Univ Technol, Sch Mat & Engn, Changzhou 213001, Peoples R China
来源：
OPTICAL MATERIALS | 2019年 / 88卷
关键词：
NiFe2O4; Bi24O31Br10; Nanocomposites; Photocatalytic; Mechanism; METAL-ORGANIC FRAMEWORK; FACILE FABRICATION; HETEROJUNCTION; COMPOSITE; DEGRADATION; NANOSHEETS; GRAPHENE; DYES; ZNO; ADSORPTION;
D O I：
10.1016/j.optmat.2018.11.025
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Novel multifunctional NiFe2O4/Bi24O31Br10 nanocomposites were synthesized by a thermal decomposition process and hydrothermal route. The structures, morphologies, as well as the magnetic, optical and visible-light photocatalytic properties of the as-prepared nanocomposites were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL) spectroscopy, vibrating sample magnetometer (VSM) and UV-visible diffuse reflectance spectroscopy (DRS). The experimental results reveal that the NiFe2O4/Bi24O31Br10 composites exhibit an enhanced photocatalytic activity for photo-degradation of crystal violet (CV) under visible light irradiation. Among the prepared samples, the 20% NiFe2O4/Bi24O31Br10 nanocomposite displays the best photocatalytic activity, which is mainly ascribed to the efficient separation of photo-induced electron-hole pairs. Hydroxyl (center dot OH) radicals and holes are confirmed to be the dominant active species in the NiFe2O4/Bi24O31Br10 photocatalytic system. Furthermore, due to their excellent ferromagnetism and stability, NiFe2O4/Bi24O31Br10 nanocomposites can be easily separated from contaminant solution by using a magnet, implying that they have promising application in treatment of various dyestuff wastewaters on a large scale.
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页码：195 / 203
页数：9
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