In-situ growth of Au and β-Bi2O3 nanoparticles on flower-like Bi2O2CO3: A multi-heterojunction photocatalyst with enhanced visible light responsive photocatalytic activity

被引：49
作者：
Wang, Peifang [1 ]
Xu, Liya [1 ]
Ao, Yanhui [1 ]
Wang, Chao [1 ]
机构：
[1] Hohai Univ, Coll Environm, Key Lab Integrated Regulat & Resource Dev Shallow, Minist Educ, Nanjing 210098, Jiangsu, Peoples R China
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2017年 / 495卷
基金：
美国国家科学基金会; 中国国家自然科学基金;
关键词：
Multi-heterojunction; Bi2O2CO3; Surface plasmon resonance; Flower-like structure; Photocatalysis; RHODAMINE-B; HIERARCHICAL MICROSPHERES; PERFORMANCE; DEGRADATION; FABRICATION; COMPOSITES; NANOCOMPOSITES; MICROSTRUCTURES; DECOMPOSITION; BIVO4;
D O I：
10.1016/j.jcis.2017.02.003
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 work, flower-like Au/Bi2O2CO3/Bi2O3 multi-heterojunction photocatalysts were prepared by a in situ growth method. The as-prepared samples were characterized by different techniques including Transmission Electron Microscopy (TEM), X-ray diffraction (XRD), UV-vis diffuse reflectance spectrometry (DRS), X-ray photoelectron spectroscopy (XPS), Photoluminescence (PL) and photo-induced current. The photocatalytic performance of the as prepared samples was evaluated by degradation of rhodamine B (RhB) under visible light (lambda > 400 nm). Au/Bi2O2CO3/Bi2O3 exhibited much higher activity than pure Bi2O2CO3 or Bi2O2CO3/Bi2O3. The rate constant of best one Au/Bi2O2CO3/Bi2O3 sample is 100 and 14 times as that of pure Bi2O2CO3 and beta-Bi2O3/Bi2O2CO3, respectively. The enhanced photocatalytic activity of Au/Bi2O2CO3/Bi2O3 can be ascribed to the surface plasmon resonance (SPR) effects of Au nanoparticles and the formed multi-heterojunctions, which enhanced the absorbance of visible light and facilitated the transferring and separation of photogenerated electron-hole pairs, respectively. (C) 2017 Elsevier Inc. All rights reserved.
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页码：122 / 129
页数：8
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