Ta-substituted SnNb2-xTaxO6 photocatalysts for hydrogen evolution under visible light irradiation

Chan Woo Lee; Hoon Kee Park; Sangbaek Park; Hyun Soo Han; Se Won Seo; Hee Jo Song; Sun Shin; Dong Wan Kim; Kug Sun Hong

doi:10.1039/c4ta05885b

Ta-substituted SnNb_2-xTa_xO₆ photocatalysts for hydrogen evolution under visible light irradiation

Chan Woo Lee, Hoon Kee Park, Sangbaek Park, Hyun Soo Han, Se Won Seo, Hee Jo Song, Sun Shin, Dong Wan Kim, Kug Sun Hong

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

18 Citations (Scopus)

Abstract

Ta-substituted SnNb_2-xTa_xO₆ was successfully prepared via a solid-state reaction to study the effect of Ta insertion in Nb sites on the crystal structure, photophysical properties, and photocatalytic activities for hydrogen evolution. Analyses of X-ray diffraction patterns and Raman spectra revealed that the substitution of Ta caused not only a more tightly packed atomic structure with greater crystal structural distortion, but also a shorter M-O bond length in MO₆ octahedra. Additionally, we observed a gradual increase in the band gap, changing the photoabsorption property and conduction band electronic structure. The SnNb_1.4Ta_0.6O₆ photocatalyst showed enhanced hydrogen evolution compared to pristine SnNb₂O₆. This result was mainly attributed to better transport ability of the photo-generated charge carriers.

Original language	English
Pages (from-to)	825-831
Number of pages	7
Journal	Journal of Materials Chemistry A
Volume	3
Issue number	2
DOIs	https://doi.org/10.1039/c4ta05885b
Publication status	Published - 2015 Jan 14

Bibliographical note

Publisher Copyright:
© The Royal Society of Chemistry 2015.

ASJC Scopus subject areas

General Chemistry
Renewable Energy, Sustainability and the Environment
General Materials Science

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1039/c4ta05885b

Cite this

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title = "Ta-substituted SnNb2-xTaxO6 photocatalysts for hydrogen evolution under visible light irradiation",

abstract = "Ta-substituted SnNb2-xTaxO6 was successfully prepared via a solid-state reaction to study the effect of Ta insertion in Nb sites on the crystal structure, photophysical properties, and photocatalytic activities for hydrogen evolution. Analyses of X-ray diffraction patterns and Raman spectra revealed that the substitution of Ta caused not only a more tightly packed atomic structure with greater crystal structural distortion, but also a shorter M-O bond length in MO6 octahedra. Additionally, we observed a gradual increase in the band gap, changing the photoabsorption property and conduction band electronic structure. The SnNb1.4Ta0.6O6 photocatalyst showed enhanced hydrogen evolution compared to pristine SnNb2O6. This result was mainly attributed to better transport ability of the photo-generated charge carriers.",

author = "Lee, {Chan Woo} and Park, {Hoon Kee} and Sangbaek Park and Han, {Hyun Soo} and Seo, {Se Won} and Song, {Hee Jo} and Sun Shin and Kim, {Dong Wan} and Hong, {Kug Sun}",

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T1 - Ta-substituted SnNb2-xTaxO6 photocatalysts for hydrogen evolution under visible light irradiation

AU - Lee, Chan Woo

AU - Park, Hoon Kee

AU - Park, Sangbaek

AU - Han, Hyun Soo

AU - Seo, Se Won

AU - Song, Hee Jo

AU - Shin, Sun

AU - Kim, Dong Wan

AU - Hong, Kug Sun

PY - 2015/1/14

Y1 - 2015/1/14

N2 - Ta-substituted SnNb2-xTaxO6 was successfully prepared via a solid-state reaction to study the effect of Ta insertion in Nb sites on the crystal structure, photophysical properties, and photocatalytic activities for hydrogen evolution. Analyses of X-ray diffraction patterns and Raman spectra revealed that the substitution of Ta caused not only a more tightly packed atomic structure with greater crystal structural distortion, but also a shorter M-O bond length in MO6 octahedra. Additionally, we observed a gradual increase in the band gap, changing the photoabsorption property and conduction band electronic structure. The SnNb1.4Ta0.6O6 photocatalyst showed enhanced hydrogen evolution compared to pristine SnNb2O6. This result was mainly attributed to better transport ability of the photo-generated charge carriers.

AB - Ta-substituted SnNb2-xTaxO6 was successfully prepared via a solid-state reaction to study the effect of Ta insertion in Nb sites on the crystal structure, photophysical properties, and photocatalytic activities for hydrogen evolution. Analyses of X-ray diffraction patterns and Raman spectra revealed that the substitution of Ta caused not only a more tightly packed atomic structure with greater crystal structural distortion, but also a shorter M-O bond length in MO6 octahedra. Additionally, we observed a gradual increase in the band gap, changing the photoabsorption property and conduction band electronic structure. The SnNb1.4Ta0.6O6 photocatalyst showed enhanced hydrogen evolution compared to pristine SnNb2O6. This result was mainly attributed to better transport ability of the photo-generated charge carriers.

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