Construction of Bi2O3/g-C3N4 composite photocatalyst and its enhanced visible light photocatalytic performance and mechanism

被引：85
|
作者：
Cui, Yuqi [1 ]
Zhang, Xinyi [1 ]
Guo, Ruonan [1 ]
Zhang, Huixuan [1 ]
Li, Bo [1 ]
Xie, Mingzheng [1 ]
Cheng, Qingfeng [2 ]
Cheng, Xiuwen [1 ,2 ]
机构：
[1] Lanzhou Univ, Key Lab Western Chinas Environm Syst, Minist Educ, Coll Earth & Environm Sci, Lanzhou 730000, Gansu, Peoples R China
[2] Chengdu Univ Informat Technol, Coll Resources & Environm, Chengdu 610225, Sichuan, Peoples R China
来源：
SEPARATION AND PURIFICATION TECHNOLOGY | 2018年 / 203卷
基金：
中国国家自然科学基金;
关键词：
Bi2O3/g-C3N4; Z-scheme photocatalyst; Visible light; Photocatalysis; Amido black 10B dye; GRAPHITIC CARBON NITRIDE; DOPED TIO2 PHOTOCATALYSTS; G-C3N4; PHOTOCATALYST; BI2O3-TIO2; COMPOSITE; HYDROGEN EVOLUTION; DEGRADATION; IRRADIATION; PHOTOELECTRODE; HETEROJUNCTION; FABRICATION;
D O I：
10.1016/j.seppur.2018.04.061
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
To improve the photocatalytic (PC) performance of g-C3N4 nano-material, a novel Z-scheme Bi2O3/g-C3N4 composite photocatalyst was synthesized by heat treatment method. Subsequently, the morphologies, chemical structures, optical and photoelectrochemical (PECH) properties of as-obtained photocatalysts were investigated through X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET) surface areas, UV visible diffuse reflectance spectroscopy (UV vis DRS), transient photocurrent density, Mott-Schottky (M-S) and electrochemical impedance spectroscopy (EIS) measurement. Furthermore, the PC efficiency was evaluated by degradation of amido black 10B dye. All results indicated that as-fabricated Bi2O3/g-C3N4 photocatalytic system displayed superior PC performance under visible light illumination, which was mainly ascribed to the intense visible light absorbance and the migration of photo-generated carriers adopted a Z-scheme mechanism. Moreover, the degradation of amido black 10B for 3 wt.%Bi2O3/g-C3N4 were about 1.41 and 1.42 times than that of pure g-C3N4 and pure Bi2O3, respectively.
引用
收藏
页码：301 / 309
页数：9
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