Novel Bi/BiOBr/AgBr composite microspheres: Ion exchange synthesis and photocatalytic performance

被引：28

作者：

Lyu, Jianchang ^{[1
]}

Li, Zhenlu ^{[1
]}

Ge, Ming ^{[1
,2
]}

机构：

[1] North China Univ Sci & Technol, Coll Chem Engn, Tangshan 063210, Peoples R China

[2] Hebei Key Lab Photocatalyt & Electrocatalyt Mat E, Tangshan 063210, Peoples R China

来源：

SOLID STATE SCIENCES | 2018年 / 80卷

关键词：

Bi/BiOBr/AgBr microspheres; Ion exchange; Photocatalysis; Visible light; Mechanism; VISIBLE-LIGHT PHOTOCATALYSIS; ENVIRONMENTAL APPLICATIONS; HIERARCHICAL MICROSPHERES; PLASMONIC PHOTOCATALYST; BIOBR NANOSHEETS; RHODAMINE-B; DEGRADATION; IRRADIATION; NANOPARTICLES; FABRICATION;

D O I：

10.1016/j.solidstatesciences.2018.04.004

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Novel Bi/BiOBr/AgBr composite microspheres were prepared by a rational in situ ion exchange reaction between Bi/BiOBr microspheres and AgNO3 . The characteristic of the as-obtained ternary microspheres was tested by X-ray diffraction (XRD), energy dispersive X-ray spectrometer (EDS), scanning electron microscope (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (UV-vis DRS) and photoluminescence (PL). Under visible light irradiation, Bi/BiOBr/AgBr microspheres exhibited an excellent photocatalytic efficiency for rhodamine B (RhB) degradation, which was about 1.4 and 4.9 times as high as that of Bi/BiOBr and BiOBr/AgBr, demonstrating that the highest separation efficiency of charge carriers in the heterostructured Bi/BiOBr/AgBr. The photocatalytic activity of Bi/BiOBr/AgBr microspheres just exhibited a slight decrease after three consecutive cycles. The photocatalytic mechanism investigation confirmed that the superoxide radicals (O-2(center dot)-) were the dominant reactive oxygen species for RhB degradation in Bi/BiOBr/AgBr suspension. (C) 2018 Elsevier Masson SAS. All rights reserved.

引用

页码：101 / 109

页数：9

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