Recent Progress on the Bismuth Containing Complex Oxide Photocatalysts

doi:10.3724/SP.J.1077.2012.00011

Abstract

Abstract:

Photocatalysts could utilize solar energy to remedy environmental pollutions thus attract world wide attention. Some bismuth-containing complex oxides could be activated by visible light and mineralize organic pollutants. In this paper we reviewed recent progresses on the development of Bi₂WO₆, BiVO₄ and Bi₂MoO₆ photocatalysts. By controlling the particle size, morphology, crystallinity and other microstructures via different methods, the photocatalytic activities in the degradation of organic dyes, colorless model pollutants such as phenol and acetaldehyde, and disinfection of these visible light induced photocatalysts were greatly enhanced. Through further development, bismuth- containing complex oxides are hopeful to be applied in the field of environmental remediation.

Key words: bismuth containing complex oxides, photocatalyst, visible light, environmental remediation, review

CLC Number:

TB322

WANG Wen-Zhong, SHANG Meng, YIN Wen-Zong, REN Jia, ZHOU Lin. Recent Progress on the Bismuth Containing Complex Oxide Photocatalysts[J]. Journal of Inorganic Materials, 2012, 27(1): 11-18.

Figures/Tables 11

Fig. 1 Schematic structure of Bi2WO6 photocatalyst and energy band diagram of Bi2WO6 calculated by the DFT method[6]

Fig. 2 XRD pattern (A) and TEM image (B) of Bi2WO6 prepared by hydrothermal method at 160℃ for 24 h[19]

Fig. 3 (A) UV-Vis diffuse reflectance spectra of the Bi2WO6 nanosheet; (B) Temporal change of UV-Vis spectrum of RhB aqueous solution; (C) Comparison of the photocatalytic activities of different Bi2WO6 and blank test (the Bi2WO6 used for comparison are prepared by solid-state reaction, traditional hydrothermal, and hydrothermal method using Bi(NH3)2C6H7O7 as Bi source, respectively; (D) Cycling runs in the photocatalytic degradation of RhB in the presence of Bi2WO6 nanosheet under visible-light[19]

Fig. 4 (A) TEM image of carbon spheres; (B) SEM image of Bi2WO6 nanocages; (C) The photo-degradation efficiencies of RhB as a function of irradiation time by different photocatalysts; (D) The temporal evolution of the spectra during the photodegradation of RhB mediated by the Bi2WO6 nanocages under visible light (λ > 420 nm)[26]

Fig. 5 SEM images of Bi2WO6 nanofibers before calcination (a) and after calcinations (b); (c) photocatalytic degradation of CH3CHO (1×10-4) under visible-light (λ >420 nm); (d) Comparison of the photocatalytic degradation of NH4+/NH3 by different samples[29]

Fig. 6 (A) Images of colonies on an agar plates: (a) E. coli suspension before reaction; (b) E. coli suspension containing Bi2WO6 in the dark; (c) E. coli suspension without Bi2WO6 under visible light irradiation; (d) E. coli suspension containing Bi2WO6 under visible light irradiation. (B) Survival ratio of E. coli in aqueous dispersions: (a) Bi2WO6 in the dark; (b) No catalyst; and (c) Bi2WO6 under visible light irradiation. (C) TEM images of E. coli irradiated by visible light with Bi2WO6 (a) E. coli before reaction; (b) E. coli treated for 2 h[34]

Fig. 7 Total and partial density of states for the BiVO4(z-t) (a) and BiVO4(s-t) (b) [1]

Fig. 8 SEM image (A) and XRD patterns (B) of UR-BiVO4 when ultrasonic time was 30 min (a), 60 min (b) and by solid state reaction; (C) UV-Vis diffuse reflectance spectra of UR-BiVO4 and SSR-BiVO4 samples, Inset: plots of ?αhv? versus photon energy (hv); (D) Changes of UV-Vis spectra of UR-BiVO4 suspended MO solution as a function of irradiation time. Inset: MO concentration changes over UR-BiVO4, SSR-BiVO4 and P25[44]

Fig. 9 (A) TEM of m-BiVO4 hollow spheres; (B) Comparison of the photodegradation of RhB by HS-BVO (a), AM-BVO (b), and SSR-BVO (c) under visible light (λ>420 nm)[45]

Fig. 10 (A) SEM image of Bi2MoO6 hollow spheres; (B) Photocatalytic degradation of phenol over HS-BMO (a), SSR- BMO (b) and photolysis (c) under visible-light (λ>420 nm) [51]

Fig. 11 Photodegradation of RhB (A), phenol (B) and disinfection (C), ((b) Bi2MoO6 under the irradiation for 6 h; (c) control; (d) Bi2MoO6 only; (e) 3W blue LED only) by Bi2MoO6 under 3W blue LED[52]

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[54]	第一作者学术成就介绍:王文中, 男, 博士, 中国科学院上海硅酸盐研究所研究员, 中科院“百人计划”. 主要从事以铋基复合氧化物为主的可见光催化材料的设计、合成、光催化机理及其在环境净化方面的应用等研究工作. 在Angew. Chem. Int. Ed.等SCI期刊上发表论文90篇, 被引用2200余次, h因子26, 申请发明专利10余项. 曾获2007、2008、2009、2011年上海硅酸盐研究所优秀研究生指导教师, 2009年中科院朱李月华优秀教师, 2009年中科院优秀研究生指导教师, 2010年中国科学院上海分院第二届杰出青年科技创新人才.