Applied Catalysis B: Environmental, volume 203, pages 633-640

Synthesis of hierarchical bismuth-rich Bi4O5BrxI2-x solid solutions for enhanced photocatalytic activities of CO2 conversion and Cr(VI) reduction under visible light

Publication typeJournal Article
Publication date2017-04-01
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor22.1
ISSN09263373, 18733883
Catalysis
Process Chemistry and Technology
General Environmental Science
Abstract
Bismuth oxyhalides (BiOX, X = Br, I) photocatalysts are rarely applied for photocatalytic reduction reaction withthe photo-induced electron, as this is impeded by their low conduction band. As a widely used approach for enhancing the photocatalytic reduction activity, bismuth-rich strategy results the bismuth content of BiOX photocatalysts increasing. In this paper, a solid solutions of bismuth-rich Bi4O5BrxI2-x were prepared applying the molecular precursor method. Bi4O5BrxI2-x were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), element mapping, Brunauer–Emmett–Teller surface analysis (BET), UV–vis diffuse reflectance spectroscopy (DRS), and X-ray photoelectron spectroscopy (XPS). The obtained photocatalytic data showed that Bi4O5BrxI2-x solid solutions had higher photocatalytic activities than Bi4O5Br2 and Bi4O5I2. At an optimal ratio of x = 1, the Bi4O5BrI photocatalyst showed the highest photocatalytic reduction activity for CO2 conversion (22.85 μmol h−1 g−1 CO generation, AQE was 0.372 at 400 nm) and Cr(VI) removal (88%). CO2 adsorption data and CO2 temperature programmed desorption (CO2-TPD) revealed that Bi4O5BrI exhibited the highest chemical adsorption ability of CO2 molecules Photocurrent and electrochemical impedance (EIS) spectroscopy demonstrated the enhanced photo-induced carrier separation efficiency of Bi4O5BrI. These mechanistic studies suggest that Bi4O5BrxI2-x solid solutions are excellent photocatalysts for solar fuel generation and environmental remediation.

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GOST Copy
Bai Y. et al. Synthesis of hierarchical bismuth-rich Bi4O5BrxI2-x solid solutions for enhanced photocatalytic activities of CO2 conversion and Cr(VI) reduction under visible light // Applied Catalysis B: Environmental. 2017. Vol. 203. pp. 633-640.
GOST all authors (up to 50) Copy
Bai Y., Ye L., Ting Chen 陈., Wang P., Wang L., Shi X., Wong P. Synthesis of hierarchical bismuth-rich Bi4O5BrxI2-x solid solutions for enhanced photocatalytic activities of CO2 conversion and Cr(VI) reduction under visible light // Applied Catalysis B: Environmental. 2017. Vol. 203. pp. 633-640.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1016/j.apcatb.2016.10.066
UR - https://doi.org/10.1016/j.apcatb.2016.10.066
TI - Synthesis of hierarchical bismuth-rich Bi4O5BrxI2-x solid solutions for enhanced photocatalytic activities of CO2 conversion and Cr(VI) reduction under visible light
T2 - Applied Catalysis B: Environmental
AU - Bai, Yang
AU - Ye, Liqun
AU - Ting Chen, 陈挺
AU - Wang, Pingquan
AU - Wang, Li
AU - Shi, X.
AU - Wong, Po-Keung
PY - 2017
DA - 2017/04/01 00:00:00
PB - Elsevier
SP - 633-640
VL - 203
SN - 0926-3373
SN - 1873-3883
ER -
BibTex
Cite this
BibTex Copy
@article{2017_Bai,
author = {Yang Bai and Liqun Ye and 陈挺 Ting Chen and Pingquan Wang and Li Wang and X. Shi and Po-Keung Wong},
title = {Synthesis of hierarchical bismuth-rich Bi4O5BrxI2-x solid solutions for enhanced photocatalytic activities of CO2 conversion and Cr(VI) reduction under visible light},
journal = {Applied Catalysis B: Environmental},
year = {2017},
volume = {203},
publisher = {Elsevier},
month = {apr},
url = {https://doi.org/10.1016/j.apcatb.2016.10.066},
pages = {633--640},
doi = {10.1016/j.apcatb.2016.10.066}
}
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