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

被引：97

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

页码：301 / 309

页数：9

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