The effect of dissolved oxygen on the 1,4-dioxane degradation with TiO2 and Au-TiO2 photocatalysts

Na Kyoung Youn; Jung Eun Heo; Oh Shim Joo; Hyunjoo Lee; Jaehoon Kim; Byoung Koun Min

doi:10.1016/j.jhazmat.2009.12.020

The effect of dissolved oxygen on the 1,4-dioxane degradation with TiO₂ and Au-TiO₂ photocatalysts

Na Kyoung Youn, Jung Eun Heo, Oh Shim Joo, Hyunjoo Lee, Jaehoon Kim, Byoung Koun Min

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

33 Citations (Scopus)

Abstract

In order to enhance the photocatalytic activity of TiO₂, the recombination of photogenerated electron-hole pairs needs to be suppressed. Noble metals, e.g. Au nanoparticles, have been incorporated with TiO₂ to efficiently separate charge carriers created in/on TiO₂. On the other hand, dissolved oxygen (DO) in an aqueous solution was also known to scavenge the electrons, which avoid the recombination of electrons and holes. In this study, we investigated the combined system of Au nanoparticles incorporated with TiO₂ and DO to gain insight into the relationship between them using a photocatalytic degradation of 1,4-dioxane. The rate constants of 1,4-dioxane photodegradation with respect to TiO₂ catalysts with three different Au loadings, as well as DO levels, indicated the DO dependency is disproportional to the Au loading amount, implying that there is an overlapping function in capturing electrons between Au nanoparticles and DO.

Original language	English
Pages (from-to)	216-221
Number of pages	6
Journal	Journal of hazardous materials
Volume	177
Issue number	1-3
DOIs	https://doi.org/10.1016/j.jhazmat.2009.12.020
Publication status	Published - 2010 May

Bibliographical note

Funding Information:
We gratefully acknowledge the support of the program of Korea Institute of Science and Technology as well as the National Research Foundation of Korea Grant funded by the Korean Government (NRF-2009-C1AAA001-0092935).

Keywords

1,4-Dioxane
Au-TiO
Dissolved oxygen
Gold nanoparticles
Photocatalysis
TiO

ASJC Scopus subject areas

Environmental Engineering
Environmental Chemistry
Waste Management and Disposal
Pollution
Health, Toxicology and Mutagenesis

Access to Document

10.1016/j.jhazmat.2009.12.020

Cite this

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title = "The effect of dissolved oxygen on the 1,4-dioxane degradation with TiO2 and Au-TiO2 photocatalysts",

abstract = "In order to enhance the photocatalytic activity of TiO2, the recombination of photogenerated electron-hole pairs needs to be suppressed. Noble metals, e.g. Au nanoparticles, have been incorporated with TiO2 to efficiently separate charge carriers created in/on TiO2. On the other hand, dissolved oxygen (DO) in an aqueous solution was also known to scavenge the electrons, which avoid the recombination of electrons and holes. In this study, we investigated the combined system of Au nanoparticles incorporated with TiO2 and DO to gain insight into the relationship between them using a photocatalytic degradation of 1,4-dioxane. The rate constants of 1,4-dioxane photodegradation with respect to TiO2 catalysts with three different Au loadings, as well as DO levels, indicated the DO dependency is disproportional to the Au loading amount, implying that there is an overlapping function in capturing electrons between Au nanoparticles and DO.",

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author = "Youn, {Na Kyoung} and Heo, {Jung Eun} and Joo, {Oh Shim} and Hyunjoo Lee and Jaehoon Kim and Min, {Byoung Koun}",

note = "Funding Information: We gratefully acknowledge the support of the program of Korea Institute of Science and Technology as well as the National Research Foundation of Korea Grant funded by the Korean Government (NRF-2009-C1AAA001-0092935).",

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AU - Lee, Hyunjoo

AU - Kim, Jaehoon

AU - Min, Byoung Koun

N1 - Funding Information: We gratefully acknowledge the support of the program of Korea Institute of Science and Technology as well as the National Research Foundation of Korea Grant funded by the Korean Government (NRF-2009-C1AAA001-0092935).

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N2 - In order to enhance the photocatalytic activity of TiO2, the recombination of photogenerated electron-hole pairs needs to be suppressed. Noble metals, e.g. Au nanoparticles, have been incorporated with TiO2 to efficiently separate charge carriers created in/on TiO2. On the other hand, dissolved oxygen (DO) in an aqueous solution was also known to scavenge the electrons, which avoid the recombination of electrons and holes. In this study, we investigated the combined system of Au nanoparticles incorporated with TiO2 and DO to gain insight into the relationship between them using a photocatalytic degradation of 1,4-dioxane. The rate constants of 1,4-dioxane photodegradation with respect to TiO2 catalysts with three different Au loadings, as well as DO levels, indicated the DO dependency is disproportional to the Au loading amount, implying that there is an overlapping function in capturing electrons between Au nanoparticles and DO.

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