Visible-light-driven Bi 2 O 3 /WO 3 composites with enhanced photocatalytic activity
Abstract
Semiconductor heterojunctions (composites) have been shown to be effective photocatalytic materials to overcome the drawbacks of low photocatalytic efficiency that results from electron–hole recombination and narrow photo-response range. We prepared a novel visible-light-driven Bi2O3/WO3 composite photocatalyst by hydrothermal synthesis. The composite was characterized by scanning transmission electron microscopy (STEM), scanning electron microscopy (SEM), powder X-ray diffraction (PXRD), X-ray photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller (BET) surface area, Raman spectroscopy, photoluminescence spectroscopy (PL) and electrochemical impedance spectroscopy (EIS) to better understand the structures, compositions, morphologies and optical properties. Bi2O3/WO3 heterojunction was found to exhibit significantly higher photocatalytic activity towards the decomposition of Rhodamine B (RhB) and 4-nitroaniline (4-NA) under visible light irradiation compared to that of Bi2O3 and WO3. A tentative mechanism for the enhanced photocatalytic activity of the heterostructured composite is discussed based on observed activity, band position calculations, photoluminescence, and electrochemical impedance data. Our study provides a new strategy for the design of composite materials with enhanced visible light photocatalytic performance.
- Authors:
-
- Wake Forest Univ., Winston Salem, NC (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1286959
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- RSC Advances
- Additional Journal Information:
- Journal Volume: 5; Journal Issue: 111; Journal ID: ISSN 2046-2069
- Publisher:
- Royal Society of Chemistry
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Adhikari, Shiba P., Dean, Hunter, Hood, Zachary D., Peng, Rui, More, Karren L., Ivanov, Ilia, Wu, Zili, and Lachgar, Abdou. Visible-light-driven Bi 2 O 3 /WO 3 composites with enhanced photocatalytic activity. United States: N. p., 2015.
Web. doi:10.1039/c5ra13579f.
Adhikari, Shiba P., Dean, Hunter, Hood, Zachary D., Peng, Rui, More, Karren L., Ivanov, Ilia, Wu, Zili, & Lachgar, Abdou. Visible-light-driven Bi 2 O 3 /WO 3 composites with enhanced photocatalytic activity. United States. https://doi.org/10.1039/c5ra13579f
Adhikari, Shiba P., Dean, Hunter, Hood, Zachary D., Peng, Rui, More, Karren L., Ivanov, Ilia, Wu, Zili, and Lachgar, Abdou. Mon .
"Visible-light-driven Bi 2 O 3 /WO 3 composites with enhanced photocatalytic activity". United States. https://doi.org/10.1039/c5ra13579f. https://www.osti.gov/servlets/purl/1286959.
@article{osti_1286959,
title = {Visible-light-driven Bi 2 O 3 /WO 3 composites with enhanced photocatalytic activity},
author = {Adhikari, Shiba P. and Dean, Hunter and Hood, Zachary D. and Peng, Rui and More, Karren L. and Ivanov, Ilia and Wu, Zili and Lachgar, Abdou},
abstractNote = {Semiconductor heterojunctions (composites) have been shown to be effective photocatalytic materials to overcome the drawbacks of low photocatalytic efficiency that results from electron–hole recombination and narrow photo-response range. We prepared a novel visible-light-driven Bi2O3/WO3 composite photocatalyst by hydrothermal synthesis. The composite was characterized by scanning transmission electron microscopy (STEM), scanning electron microscopy (SEM), powder X-ray diffraction (PXRD), X-ray photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller (BET) surface area, Raman spectroscopy, photoluminescence spectroscopy (PL) and electrochemical impedance spectroscopy (EIS) to better understand the structures, compositions, morphologies and optical properties. Bi2O3/WO3 heterojunction was found to exhibit significantly higher photocatalytic activity towards the decomposition of Rhodamine B (RhB) and 4-nitroaniline (4-NA) under visible light irradiation compared to that of Bi2O3 and WO3. A tentative mechanism for the enhanced photocatalytic activity of the heterostructured composite is discussed based on observed activity, band position calculations, photoluminescence, and electrochemical impedance data. Our study provides a new strategy for the design of composite materials with enhanced visible light photocatalytic performance.},
doi = {10.1039/c5ra13579f},
journal = {RSC Advances},
number = 111,
volume = 5,
place = {United States},
year = {Mon Oct 19 00:00:00 EDT 2015},
month = {Mon Oct 19 00:00:00 EDT 2015}
}
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