Enhanced photochemical properties of electron rich W-doped PbBi2Nb2O9 layered perovskite material under visible-light irradiation

Hyun Gyu Kim; Pramod H. Borse; Jum Suk Jang; Euh Duck Jeong; Jae Sung Lee

doi:10.1016/j.matlet.2007.08.089

Enhanced photochemical properties of electron rich W-doped PbBi₂Nb₂O₉ layered perovskite material under visible-light irradiation

Hyun Gyu Kim
, Pramod H. Borse
, Jum Suk Jang
, Euh Duck Jeong
, Jae Sung Lee^*

^*Corresponding author for this work

Environmental Biotechnology

Korea Basic Science Institute
Pohang University of Science and Technology

Research output: Contribution to journal › Journal article › peer-review

30 Scopus citations

Abstract

The substitution effect of W⁶⁺ at Nb⁵⁺ site in PbBi₂Nb₂O₉, a layered Aurivillius-phase perovskite system, has been studied and further optimized to fabricate an efficient photocatalyst. The material doped with electron donor (W⁺⁶), PbBi₂Nb_{2 - x}W_xO₉ with an optimum composition of x = 0.15 exhibited a red shifted (0.14 eV) band gap, generated two times higher photocurrent, and showed analogous higher quantum yield for photodecomposition of H₂O/CH₃OH solution than undoped material under visible light ((λ ≥ 420 nm). In contrast, the material doped with hole donor (Ti⁺⁴) revealed deteriorated photochemical properties. The higher electron density by n-type doping seems to be responsible for the more efficient charge separation in PbBi₂Nb_{2 - x}W_xO₉ (0 < x < 0.5).

Original language	English
Pages (from-to)	1427-1430
Number of pages	4
Journal	Materials Letters
Volume	62
Issue number	8-9
DOIs	https://doi.org/10.1016/j.matlet.2007.08.089
State	Published - 2008.03.31

Keywords

Perovskites, Photoelectrochemical, Photocatalysis, Solar energy materials

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10.1016/j.matlet.2007.08.089

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@article{565ee9435f8f460292efcab48e262ab1,

title = "Enhanced photochemical properties of electron rich W-doped PbBi2Nb2O9 layered perovskite material under visible-light irradiation",

abstract = "The substitution effect of W6+ at Nb5+ site in PbBi2Nb2O9, a layered Aurivillius-phase perovskite system, has been studied and further optimized to fabricate an efficient photocatalyst. The material doped with electron donor (W+6), PbBi2Nb2 - xWxO9 with an optimum composition of x = 0.15 exhibited a red shifted (0.14 eV) band gap, generated two times higher photocurrent, and showed analogous higher quantum yield for photodecomposition of H2O/CH3OH solution than undoped material under visible light ((λ ≥ 420 nm). In contrast, the material doped with hole donor (Ti+4) revealed deteriorated photochemical properties. The higher electron density by n-type doping seems to be responsible for the more efficient charge separation in PbBi2Nb2 - xWxO9 (0 < x < 0.5).",

keywords = "Perovskites, Photoelectrochemical, Photocatalysis, Solar energy materials",

author = "Kim, \{Hyun Gyu\} and Borse, \{Pramod H.\} and Jang, \{Jum Suk\} and Jeong, \{Euh Duck\} and Lee, \{Jae Sung\}",

year = "2008",

month = mar,

day = "31",

doi = "10.1016/j.matlet.2007.08.089",

language = "English",

volume = "62",

pages = "1427--1430",

journal = "Materials Letters",

issn = "0167-577X",

number = "8-9",

}

TY - JOUR

T1 - Enhanced photochemical properties of electron rich W-doped PbBi2Nb2O9 layered perovskite material under visible-light irradiation

AU - Kim, Hyun Gyu

AU - Borse, Pramod H.

AU - Jang, Jum Suk

AU - Jeong, Euh Duck

AU - Lee, Jae Sung

PY - 2008/3/31

Y1 - 2008/3/31

N2 - The substitution effect of W6+ at Nb5+ site in PbBi2Nb2O9, a layered Aurivillius-phase perovskite system, has been studied and further optimized to fabricate an efficient photocatalyst. The material doped with electron donor (W+6), PbBi2Nb2 - xWxO9 with an optimum composition of x = 0.15 exhibited a red shifted (0.14 eV) band gap, generated two times higher photocurrent, and showed analogous higher quantum yield for photodecomposition of H2O/CH3OH solution than undoped material under visible light ((λ ≥ 420 nm). In contrast, the material doped with hole donor (Ti+4) revealed deteriorated photochemical properties. The higher electron density by n-type doping seems to be responsible for the more efficient charge separation in PbBi2Nb2 - xWxO9 (0 < x < 0.5).

AB - The substitution effect of W6+ at Nb5+ site in PbBi2Nb2O9, a layered Aurivillius-phase perovskite system, has been studied and further optimized to fabricate an efficient photocatalyst. The material doped with electron donor (W+6), PbBi2Nb2 - xWxO9 with an optimum composition of x = 0.15 exhibited a red shifted (0.14 eV) band gap, generated two times higher photocurrent, and showed analogous higher quantum yield for photodecomposition of H2O/CH3OH solution than undoped material under visible light ((λ ≥ 420 nm). In contrast, the material doped with hole donor (Ti+4) revealed deteriorated photochemical properties. The higher electron density by n-type doping seems to be responsible for the more efficient charge separation in PbBi2Nb2 - xWxO9 (0 < x < 0.5).

KW - Perovskites, Photoelectrochemical, Photocatalysis, Solar energy materials

UR - https://www.scopus.com/pages/publications/38149131219

U2 - 10.1016/j.matlet.2007.08.089

DO - 10.1016/j.matlet.2007.08.089

M3 - Journal article

AN - SCOPUS:38149131219

SN - 0167-577X

VL - 62

SP - 1427

EP - 1430

JO - Materials Letters

JF - Materials Letters

IS - 8-9

ER -

Enhanced photochemical properties of electron rich W-doped PbBi₂Nb₂O₉ layered perovskite material under visible-light irradiation

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Keywords

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