The effect of UV irradiation on the reduction of Au(III) ions adsorbed on manganese dioxide

Hironori Ohashi; Hiroyuki Ezoe; Yoshihiro Okaue; Yasuhiro Kobayashi; Shuji Matsuo; Tsutomu Kurisaki; Akane Miyazaki; Hisanobu Wakita; Takushi Yokoyama

doi:10.2116/analsci.21.789

The effect of UV irradiation on the reduction of Au(III) ions adsorbed on manganese dioxide

Hironori Ohashi, Hiroyuki Ezoe, Yoshihiro Okaue, Yasuhiro Kobayashi, Shuji Matsuo, Tsutomu Kurisaki, Akane Miyazaki, Hisanobu Wakita, Takushi Yokoyama

Inorganic and Analytical Chemistry

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

18 Citations (Scopus)

Abstract

The effect of UV (ultraviolet) irradiation on the adsorption of Au(III) ions on manganese dioxide and their reduction to Au(0) (gold with 0 valence state) was investigated using XPS (X-ray photoelectron spectroscopy) and ¹⁹⁷Au Mössbauer spectroscopy. The UV irradiation accelerated the adsorption and the reduction. From the fact that the proportion of Au(0) estimated from Au 4f XPS spectra for surface analysis was significantly smaller than that from ¹⁹⁷Au Mössbauer spectra for bulk analysis, we deduced that Au(0) was interpenetrated to the inside of manganese dioxide (into deeper places than about 30 Å) where XPS is impossible to detect. The content of surface hydroxyl groups on manganese dioxide also increased due to the UV irradiation. The relationship between the charge in the content of hydroxyl groups and the interpenetration of Au(0) is discussed. 2005

Original language	English
Pages (from-to)	789-793
Number of pages	5
Journal	analytical sciences
Volume	21
Issue number	7
DOIs	https://doi.org/10.2116/analsci.21.789
Publication status	Published - Jul 2005

All Science Journal Classification (ASJC) codes

Analytical Chemistry

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title = "The effect of UV irradiation on the reduction of Au(III) ions adsorbed on manganese dioxide",

abstract = "The effect of UV (ultraviolet) irradiation on the adsorption of Au(III) ions on manganese dioxide and their reduction to Au(0) (gold with 0 valence state) was investigated using XPS (X-ray photoelectron spectroscopy) and 197Au M{\"o}ssbauer spectroscopy. The UV irradiation accelerated the adsorption and the reduction. From the fact that the proportion of Au(0) estimated from Au 4f XPS spectra for surface analysis was significantly smaller than that from 197Au M{\"o}ssbauer spectra for bulk analysis, we deduced that Au(0) was interpenetrated to the inside of manganese dioxide (into deeper places than about 30 {\AA}) where XPS is impossible to detect. The content of surface hydroxyl groups on manganese dioxide also increased due to the UV irradiation. The relationship between the charge in the content of hydroxyl groups and the interpenetration of Au(0) is discussed. 2005",

author = "Hironori Ohashi and Hiroyuki Ezoe and Yoshihiro Okaue and Yasuhiro Kobayashi and Shuji Matsuo and Tsutomu Kurisaki and Akane Miyazaki and Hisanobu Wakita and Takushi Yokoyama",

year = "2005",

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AU - Ohashi, Hironori

AU - Ezoe, Hiroyuki

AU - Okaue, Yoshihiro

AU - Kobayashi, Yasuhiro

AU - Matsuo, Shuji

AU - Kurisaki, Tsutomu

AU - Miyazaki, Akane

AU - Wakita, Hisanobu

AU - Yokoyama, Takushi

PY - 2005/7

Y1 - 2005/7

N2 - The effect of UV (ultraviolet) irradiation on the adsorption of Au(III) ions on manganese dioxide and their reduction to Au(0) (gold with 0 valence state) was investigated using XPS (X-ray photoelectron spectroscopy) and 197Au Mössbauer spectroscopy. The UV irradiation accelerated the adsorption and the reduction. From the fact that the proportion of Au(0) estimated from Au 4f XPS spectra for surface analysis was significantly smaller than that from 197Au Mössbauer spectra for bulk analysis, we deduced that Au(0) was interpenetrated to the inside of manganese dioxide (into deeper places than about 30 Å) where XPS is impossible to detect. The content of surface hydroxyl groups on manganese dioxide also increased due to the UV irradiation. The relationship between the charge in the content of hydroxyl groups and the interpenetration of Au(0) is discussed. 2005

AB - The effect of UV (ultraviolet) irradiation on the adsorption of Au(III) ions on manganese dioxide and their reduction to Au(0) (gold with 0 valence state) was investigated using XPS (X-ray photoelectron spectroscopy) and 197Au Mössbauer spectroscopy. The UV irradiation accelerated the adsorption and the reduction. From the fact that the proportion of Au(0) estimated from Au 4f XPS spectra for surface analysis was significantly smaller than that from 197Au Mössbauer spectra for bulk analysis, we deduced that Au(0) was interpenetrated to the inside of manganese dioxide (into deeper places than about 30 Å) where XPS is impossible to detect. The content of surface hydroxyl groups on manganese dioxide also increased due to the UV irradiation. The relationship between the charge in the content of hydroxyl groups and the interpenetration of Au(0) is discussed. 2005

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JO - Analytical Sciences

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The effect of UV irradiation on the reduction of Au(III) ions adsorbed on manganese dioxide

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