title: In-situ growth of Au and β-Bi(2)O(3) nanoparticles on flower-like Bi(2)O(2)CO(3): A multi-heterojunction photocatalyst with enhanced visible light responsive photocatalytic activity.
abstract: In this work, flower-like Au/Bi2O2CO3/Bi2O3multi-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 (λ>400nm). Au/Bi2O2CO3/Bi2O3exhibited much higher activity than pure Bi2O2CO3or Bi2O2CO3/Bi2O3. The rate constant of best one Au/Bi2O2CO3/Bi2O3sample is 100 and 14 times as that of pure Bi2O2CO3and β-Bi2O3/Bi2O2CO3, respectively. The enhanced photocatalytic activity of Au/Bi2O2CO3/Bi2O3can 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.
authors.affiliation: Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China.
authors.forename: Peifang
authors.initials: P
authors.lastname: Wang
authors.affiliation: Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China.
authors.forename: Liya
authors.initials: L
authors.lastname: Xu
authors.affiliation: Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China. Electronic address: andyao@hhu.edu.cn.
authors.forename: Yanhui
authors.initials: Y
authors.lastname: Ao
authors.affiliation: Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Wang
keywords: Bi(2)O(2)CO(3); Flower-like structure; Multi-heterojunction; Photocatalysis; Surface plasmon resonance