Photoreduction of nitrate ion and photoevolution of hydrogen on unsupported TiO2 and TiO2 pillared H4Nb6O17 nanocomposites

S. Tawkaew; Shu Yin; Tsugio Sato

doi:10.1016/S1466-6049(01)00096-4

Photoreduction of nitrate ion and photoevolution of hydrogen on unsupported TiO₂ and TiO₂ pillared H₄Nb₆O₁₇ nanocomposites

S. Tawkaew, Shu Yin, Tsugio Sato

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

29 Citations (Scopus)

Abstract

The photocatalytic evolution of hydrogen gas and reduction of nitrate ion were performed under irradiation of near UV-visible light (λ>290 nm) in the presence of photocatalysts such TiO₂ (Degussa-P25), TiO/Pt, H₄Nb₆O₁₇, H₄Nb₆O₁₇/Pt, H₄Nb₆O₁₇/TiO₂ and H₄Nb₆O₁₇/(Pt, TiO₂) in aqueous methanol solution at 60°C. The hydrogen production activity was in the order H₄Nb₆O₁₇/(Pt, TiO₂)>H₄ Nb₆O₁₇ /Pt>TiO₂/Pt>H₄ Nb₆O₁₇/TiO₂ >H₄Nb₆O₁₇>TiO₂. The catalysts possessing high hydrogen evolution activity such as H₄Nb₆O₁₇/(Pt, TiO₂), H₄Nb₆O₁₇/Pt, TiO₂/Pt and H₄Nb₆O₁₇/TiO₂ showed no noticeable nitrate reducing activity. Consequently, only TiO₂ and H₄NB₆O₁₇ showed the nitrate ion photoreduction activity.

Original language	English
Pages (from-to)	855-859
Number of pages	5
Journal	International Journal of Inorganic Materials
Volume	3
Issue number	7
DOIs	https://doi.org/10.1016/S1466-6049(01)00096-4
Publication status	Published - 2001 Jan 1

Keywords

Hydrogen evolution
Layered niobate
Nitrate reduction
Photocatalytic reaction
Semiconductor pillar
Titania

ASJC Scopus subject areas

Materials Chemistry

UN SDGs

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

Access to Document

10.1016/S1466-6049(01)00096-4

Cite this

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title = "Photoreduction of nitrate ion and photoevolution of hydrogen on unsupported TiO2 and TiO2 pillared H4Nb6O17 nanocomposites",

abstract = "The photocatalytic evolution of hydrogen gas and reduction of nitrate ion were performed under irradiation of near UV-visible light (λ>290 nm) in the presence of photocatalysts such TiO2 (Degussa-P25), TiO/Pt, H4Nb6O17, H4Nb6O17/Pt, H4Nb6O17/TiO2 and H4Nb6O17/(Pt, TiO2) in aqueous methanol solution at 60°C. The hydrogen production activity was in the order H4Nb6O17/(Pt, TiO2)>H4 Nb6O17 /Pt>TiO2/Pt>H4 Nb6O17/TiO2 >H4Nb6O17>TiO2. The catalysts possessing high hydrogen evolution activity such as H4Nb6O17/(Pt, TiO2), H4Nb6O17/Pt, TiO2/Pt and H4Nb6O17/TiO2 showed no noticeable nitrate reducing activity. Consequently, only TiO2 and H4NB6O17 showed the nitrate ion photoreduction activity.",

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author = "S. Tawkaew and Shu Yin and Tsugio Sato",

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AU - Yin, Shu

AU - Sato, Tsugio

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N2 - The photocatalytic evolution of hydrogen gas and reduction of nitrate ion were performed under irradiation of near UV-visible light (λ>290 nm) in the presence of photocatalysts such TiO2 (Degussa-P25), TiO/Pt, H4Nb6O17, H4Nb6O17/Pt, H4Nb6O17/TiO2 and H4Nb6O17/(Pt, TiO2) in aqueous methanol solution at 60°C. The hydrogen production activity was in the order H4Nb6O17/(Pt, TiO2)>H4 Nb6O17 /Pt>TiO2/Pt>H4 Nb6O17/TiO2 >H4Nb6O17>TiO2. The catalysts possessing high hydrogen evolution activity such as H4Nb6O17/(Pt, TiO2), H4Nb6O17/Pt, TiO2/Pt and H4Nb6O17/TiO2 showed no noticeable nitrate reducing activity. Consequently, only TiO2 and H4NB6O17 showed the nitrate ion photoreduction activity.

AB - The photocatalytic evolution of hydrogen gas and reduction of nitrate ion were performed under irradiation of near UV-visible light (λ>290 nm) in the presence of photocatalysts such TiO2 (Degussa-P25), TiO/Pt, H4Nb6O17, H4Nb6O17/Pt, H4Nb6O17/TiO2 and H4Nb6O17/(Pt, TiO2) in aqueous methanol solution at 60°C. The hydrogen production activity was in the order H4Nb6O17/(Pt, TiO2)>H4 Nb6O17 /Pt>TiO2/Pt>H4 Nb6O17/TiO2 >H4Nb6O17>TiO2. The catalysts possessing high hydrogen evolution activity such as H4Nb6O17/(Pt, TiO2), H4Nb6O17/Pt, TiO2/Pt and H4Nb6O17/TiO2 showed no noticeable nitrate reducing activity. Consequently, only TiO2 and H4NB6O17 showed the nitrate ion photoreduction activity.

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KW - Photocatalytic reaction

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