Entrapment of Bi2O3 nanoparticles in TiO2 nanotubes for visible light-driven photocatalysis

Quanming Peng; Guiming Peng; Liangpeng Wu; Xiaoyang Wang; Xu Yang; Xinjun Li

doi:10.1007/s11164-018-3520-z

Entrapment of Bi₂O₃ nanoparticles in TiO₂ nanotubes for visible light-driven photocatalysis

Quanming Peng, Guiming Peng, Liangpeng Wu, Xiaoyang Wang, Xu Yang, Xinjun Li

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

19 Scopus citations

Abstract

In this study, we prepared nanoparticles of the visible light-responsive photocatalyst, Bi₂O₃ entrapped in anatase TiO₂ nanotubes (Bi₂O₃-in-TNTs) via a vacuum-assisted precursor-filling process followed by annealing. Owing to the unique tubular electronic structure of TiO₂ nanotubes, the interior of the nanotube is in an electron-deficient state, which was confirmed by XPS spectra and H₂-TPR. Electrochemical impedance studies showed that the Bi₂O₃-in-TNTs demonstrated a more efficient separation of photogenerated carriers than when Bi₂O₃ nanoparticles were deposited on the outer wall of TiO₂ nanotubes (Bi₂O₃-out-TNTs). Due to the confinement effect of TiO₂ nanotubes, which inhibits photogenerated carriers’ recombination, the Bi₂O₃-in-TNTs exhibited a better photocatalytic performance for the photo-degradation of methyl orange under visible light compared to Bi₂O₃-out-TNTs.

Original language	English
Pages (from-to)	6753-6763
Number of pages	11
Journal	Research on Chemical Intermediates
Volume	44
Issue number	11
DOIs	https://doi.org/10.1007/s11164-018-3520-z
State	Published - 1 Nov 2018
Externally published	Yes

Keywords

BiO
Confinement effect
Photocatalysis
TiO nanotubes
Visible light

ASJC Scopus subject areas

General Chemistry

Access to Document

10.1007/s11164-018-3520-z

Cite this

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title = "Entrapment of Bi2O3 nanoparticles in TiO2 nanotubes for visible light-driven photocatalysis",

abstract = "In this study, we prepared nanoparticles of the visible light-responsive photocatalyst, Bi2O3 entrapped in anatase TiO2 nanotubes (Bi2O3-in-TNTs) via a vacuum-assisted precursor-filling process followed by annealing. Owing to the unique tubular electronic structure of TiO2 nanotubes, the interior of the nanotube is in an electron-deficient state, which was confirmed by XPS spectra and H2-TPR. Electrochemical impedance studies showed that the Bi2O3-in-TNTs demonstrated a more efficient separation of photogenerated carriers than when Bi2O3 nanoparticles were deposited on the outer wall of TiO2 nanotubes (Bi2O3-out-TNTs). Due to the confinement effect of TiO2 nanotubes, which inhibits photogenerated carriers{\textquoteright} recombination, the Bi2O3-in-TNTs exhibited a better photocatalytic performance for the photo-degradation of methyl orange under visible light compared to Bi2O3-out-TNTs.",

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author = "Quanming Peng and Guiming Peng and Liangpeng Wu and Xiaoyang Wang and Xu Yang and Xinjun Li",

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AU - Peng, Quanming

AU - Peng, Guiming

AU - Wu, Liangpeng

AU - Wang, Xiaoyang

AU - Yang, Xu

AU - Li, Xinjun

PY - 2018/11/1

Y1 - 2018/11/1

N2 - In this study, we prepared nanoparticles of the visible light-responsive photocatalyst, Bi2O3 entrapped in anatase TiO2 nanotubes (Bi2O3-in-TNTs) via a vacuum-assisted precursor-filling process followed by annealing. Owing to the unique tubular electronic structure of TiO2 nanotubes, the interior of the nanotube is in an electron-deficient state, which was confirmed by XPS spectra and H2-TPR. Electrochemical impedance studies showed that the Bi2O3-in-TNTs demonstrated a more efficient separation of photogenerated carriers than when Bi2O3 nanoparticles were deposited on the outer wall of TiO2 nanotubes (Bi2O3-out-TNTs). Due to the confinement effect of TiO2 nanotubes, which inhibits photogenerated carriers’ recombination, the Bi2O3-in-TNTs exhibited a better photocatalytic performance for the photo-degradation of methyl orange under visible light compared to Bi2O3-out-TNTs.

AB - In this study, we prepared nanoparticles of the visible light-responsive photocatalyst, Bi2O3 entrapped in anatase TiO2 nanotubes (Bi2O3-in-TNTs) via a vacuum-assisted precursor-filling process followed by annealing. Owing to the unique tubular electronic structure of TiO2 nanotubes, the interior of the nanotube is in an electron-deficient state, which was confirmed by XPS spectra and H2-TPR. Electrochemical impedance studies showed that the Bi2O3-in-TNTs demonstrated a more efficient separation of photogenerated carriers than when Bi2O3 nanoparticles were deposited on the outer wall of TiO2 nanotubes (Bi2O3-out-TNTs). Due to the confinement effect of TiO2 nanotubes, which inhibits photogenerated carriers’ recombination, the Bi2O3-in-TNTs exhibited a better photocatalytic performance for the photo-degradation of methyl orange under visible light compared to Bi2O3-out-TNTs.

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