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

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Keywords

Oleic acid
pH
Superhydrophilicity
TiO photocatalyst
Underwater superoleophobicity

ASJC Scopus subject areas

Surfaces and Interfaces
Physical and Theoretical Chemistry
Colloid and Surface Chemistry

Cite this

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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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.",

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AU - Yabumoto, Daisuke

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AU - Sawai, Yusuke

AU - Nishimoto, Shunsuke

AU - Kameshima, Yoshikazu

AU - Miyake, Michihiro

AU - Fujii, Eiji

AU - Katsumata, Ken ichi

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KW - Superhydrophilicity

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KW - Underwater superoleophobicity

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10.1016/j.colsurfa.2018.03.061