Visible-light-driven Bi2O3/WO3 composites with enhanced photocatalytic activity

Shiba P. Adhikari; Hunter Dean; Zachary D. Hood; Rui Peng; Karren L. More; Ilia Ivanov; Zili Wu; Abdou Lachgar

doi:10.1039/c5ra13579f

Visible-light-driven Bi₂O₃/WO₃ composites with enhanced photocatalytic activity

Shiba P. Adhikari
, Hunter Dean
, Zachary D. Hood
, Rui Peng
, Karren L. More
, Ilia Ivanov
, Zili Wu
, Abdou Lachgar

Research output: Contribution to journal › Article › peer-review

60 Scopus citations

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. A novel visible-light-driven Bi₂O₃/WO₃ composite photocatalyst was prepared 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. The present study provides a new strategy for the design of composite materials with enhanced visible light photocatalytic performance.

Original language	English
Pages (from-to)	91094-91102
Number of pages	9
Journal	RSC Advances
Volume	5
Issue number	111
DOIs	https://doi.org/10.1039/c5ra13579f
State	Published - Oct 19 2015

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title = "Visible-light-driven Bi2O3/WO3 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. A novel visible-light-driven Bi2O3/WO3 composite photocatalyst was prepared 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. The present study provides a new strategy for the design of composite materials with enhanced visible light photocatalytic performance.",

author = "Adhikari, \{Shiba P.\} and Hunter Dean and Hood, \{Zachary D.\} and Rui Peng and More, \{Karren L.\} and Ilia Ivanov and Zili Wu and Abdou Lachgar",

note = "Publisher Copyright: {\textcopyright} The Royal Society of Chemistry.",

year = "2015",

month = oct,

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doi = "10.1039/c5ra13579f",

language = "English",

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T1 - Visible-light-driven Bi2O3/WO3 composites with enhanced photocatalytic activity

AU - Adhikari, Shiba P.

AU - Dean, Hunter

AU - Hood, Zachary D.

AU - Peng, Rui

AU - More, Karren L.

AU - Ivanov, Ilia

AU - Wu, Zili

AU - Lachgar, Abdou

PY - 2015/10/19

Y1 - 2015/10/19

N2 - 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. A novel visible-light-driven Bi2O3/WO3 composite photocatalyst was prepared 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. The present study provides a new strategy for the design of composite materials with enhanced visible light photocatalytic performance.

AB - 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. A novel visible-light-driven Bi2O3/WO3 composite photocatalyst was prepared 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. The present study provides a new strategy for the design of composite materials with enhanced visible light photocatalytic performance.

UR - https://www.scopus.com/pages/publications/84946127153

U2 - 10.1039/c5ra13579f

DO - 10.1039/c5ra13579f

M3 - Article

AN - SCOPUS:84946127153

SN - 2046-2069

VL - 5

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EP - 91102

JO - RSC Advances

JF - RSC Advances

IS - 111

ER -

Visible-light-driven Bi₂O₃/WO₃ composites with enhanced photocatalytic activity

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