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

1 Citation (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
pH
Superhydrophilicity
TiO photocatalyst
Underwater superoleophobicity

ASJC Scopus subject areas

Surfaces and Interfaces
Physical and Theoretical Chemistry
Colloid and Surface Chemistry

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Yabumoto, D., Ota, M., Sawai, Y., Nishimoto, S., Kameshima, Y., Miyake, M., Fujii, E., & Katsumata, K. I. (2018). Underwater wettability of oleic acid on TiO₂ photocatalyst surface. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 548, 32-36. https://doi.org/10.1016/j.colsurfa.2018.03.061

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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, pH, Superhydrophilicity, TiO photocatalyst, Underwater superoleophobicity",

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}",

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T1 - Underwater wettability of oleic acid on TiO2 photocatalyst surface

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

PY - 2018/7/5

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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.

KW - Oleic acid

KW - pH

KW - Superhydrophilicity

KW - TiO photocatalyst

KW - Underwater superoleophobicity

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