Underwater wettability of oleic acid on TiO2 photocatalyst surface

Daisuke Yabumoto; Misaki Ota; Yusuke Sawai; Shunsuke Nishimoto; Yoshikazu Kameshima; Michihiro Miyake; Eiji Fujii; Ken ichi Katsumata

doi:10.1016/j.colsurfa.2018.03.061

Underwater wettability of oleic acid on TiO₂ photocatalyst surface

Daisuke Yabumoto, Misaki Ota, Yusuke Sawai, Shunsuke Nishimoto, Yoshikazu Kameshima, Michihiro Miyake, Eiji Fujii, Ken ichi Katsumata

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

3 Citations (Scopus)

Abstract

Rough and flat titanium dioxide (TiO₂) surfaces were prepared, and the effect of water pH on the underwater wettability of oleic acid on the TiO₂ surfaces was investigated. The underwater contact angle of oleic acid on the relatively flat TiO₂ surface depended on the pH of water in the range pH 3–5. The repellency of oleic acid on the relatively flat TiO₂ surface increased with decreasing pH. On the other hand, the hierarchical rough TiO₂ surface repelled oleic acid in water, regardless of the pH of water.

Original language	English
Pages (from-to)	32-36
Number of pages	5
Journal	Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume	548
DOIs	https://doi.org/10.1016/j.colsurfa.2018.03.061
Publication status	Published - Jul 5 2018

Keywords

Oleic acid
Superhydrophilicity
TiO photocatalyst
Underwater superoleophobicity
pH

ASJC Scopus subject areas

Surfaces and Interfaces
Physical and Theoretical Chemistry
Colloid and Surface Chemistry

Access to Document

10.1016/j.colsurfa.2018.03.061

Cite this

Underwater wettability of oleic acid on TiO₂ photocatalyst surface. / Yabumoto, Daisuke; Ota, Misaki; Sawai, Yusuke; Nishimoto, Shunsuke ; Kameshima, Yoshikazu ; Miyake, Michihiro; Fujii, Eiji; Katsumata, Ken ichi.

In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 548, 05.07.2018, p. 32-36.

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

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title = "Underwater wettability of oleic acid on TiO2 photocatalyst surface",

abstract = "Rough and flat titanium dioxide (TiO2) surfaces were prepared, and the effect of water pH on the underwater wettability of oleic acid on the TiO2 surfaces was investigated. The underwater contact angle of oleic acid on the relatively flat TiO2 surface depended on the pH of water in the range pH 3–5. The repellency of oleic acid on the relatively flat TiO2 surface increased with decreasing pH. On the other hand, the hierarchical rough TiO2 surface repelled oleic acid in water, regardless of the pH of water.",

keywords = "Oleic acid, Superhydrophilicity, TiO photocatalyst, Underwater superoleophobicity, pH",

author = "Daisuke Yabumoto and Misaki Ota and Yusuke Sawai and Shunsuke Nishimoto and Yoshikazu Kameshima and Michihiro Miyake and Eiji Fujii and Katsumata, {Ken ichi}",

note = "Funding Information: This study was partly supported by the Joint Usage/Research Program of “Photocatalysis International Research Center,” Research Institute for Science and Technology, Tokyo University of Science . The authors would like to thank Dr. Tomohiko Yoshioka and Prof. Satoshi Hayakawa of Okayama University for assistance in the XRD analyses. Publisher Copyright: {\textcopyright} 2018 Elsevier B.V. Copyright: Copyright 2018 Elsevier B.V., All rights reserved.",

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AU - Yabumoto, Daisuke

AU - Ota, Misaki

AU - Sawai, Yusuke

AU - Nishimoto, Shunsuke

AU - Kameshima, Yoshikazu

AU - Miyake, Michihiro

AU - Fujii, Eiji

AU - Katsumata, Ken ichi

N1 - Funding Information: This study was partly supported by the Joint Usage/Research Program of “Photocatalysis International Research Center,” Research Institute for Science and Technology, Tokyo University of Science . The authors would like to thank Dr. Tomohiko Yoshioka and Prof. Satoshi Hayakawa of Okayama University for assistance in the XRD analyses. Publisher Copyright: © 2018 Elsevier B.V. Copyright: Copyright 2018 Elsevier B.V., All rights reserved.

PY - 2018/7/5

Y1 - 2018/7/5

N2 - Rough and flat titanium dioxide (TiO2) surfaces were prepared, and the effect of water pH on the underwater wettability of oleic acid on the TiO2 surfaces was investigated. The underwater contact angle of oleic acid on the relatively flat TiO2 surface depended on the pH of water in the range pH 3–5. The repellency of oleic acid on the relatively flat TiO2 surface increased with decreasing pH. On the other hand, the hierarchical rough TiO2 surface repelled oleic acid in water, regardless of the pH of water.

AB - Rough and flat titanium dioxide (TiO2) surfaces were prepared, and the effect of water pH on the underwater wettability of oleic acid on the TiO2 surfaces was investigated. The underwater contact angle of oleic acid on the relatively flat TiO2 surface depended on the pH of water in the range pH 3–5. The repellency of oleic acid on the relatively flat TiO2 surface increased with decreasing pH. On the other hand, the hierarchical rough TiO2 surface repelled oleic acid in water, regardless of the pH of water.

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KW - Superhydrophilicity

KW - TiO photocatalyst

KW - Underwater superoleophobicity

KW - pH

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