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

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:495

Article

Wang, Peifang¹  Xu, Liya¹  Ao, Yanhui¹  Wang, Chao¹ 

[1] Hohai Univ, Coll Environm, Key Lab Integrated Regulat & Resource Dev Shallow, Minist Educ, Nanjing 210098, Jiangsu, Peoples R China

关键词: Multi-heterojunction;    Bi2O2CO3;    Surface plasmon resonance;    Flower-like structure;    Photocatalysis;   

DOI  :  10.1016/j.jcis.2017.02.003

来源: Elsevier

【 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.

【 授权许可】

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