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Your search keyword '"Horibe, Hideo"' showing total 329 results
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329 results on '"Horibe, Hideo"'

2. Synergistic Formation of Radicals by Irradiation with Both Vacuum Ultraviolet and Atomic Hydrogen: A Real-Time In Situ Electron Spin Resonance Study

Author

Ishikawa, Kenji, Sumi, Naoya, Kono, Akihiko, Horibe, Hideo, Takeda, Keigo, Kondo, Hiroki, Sekine, Makoto, and Hori, Masaru

Subjects
Physics - Chemical Physics, Physics - Biological Physics, Quantitative Biology - Quantitative Methods
Abstract

We report on the surface modification of polytetrafluoroethylene (PTFE) as an example of soft- and bio-materials that occur under plasma discharge by kinetics analysis of radical formation using in situ real-time electron spin resonance (ESR) measurements. During irradiation with hydrogen plasma, simultaneous measurements of the gas-phase ESR signals of atomic hydrogen and the carbon dangling bond (C-DB) on PTFE were performed. Dynamic changes of the C-DB density were observed in real time, where the rate of density change was accelerated during initial irradiation and then became constant over time. It is noteworthy that C-DBs were formed synergistically by irradiation with both vacuum ultraviolet (VUV) and atomic hydrogen. The in situ real-time ESR technique is useful to elucidate synergistic roles during plasma surface modification., Comment: 14 pages, 4 figures

Published
2012
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28. Enhanced decomposition of toxic pollutants by underwater pulsed discharge in the presence of hydrogen peroxide and microbubbles.

Author

Matsuura, Risako, Kometani, Noritsugu, Horibe, Hideo, and Shirafuji, Tatsuru

Abstract

The decomposition of phenol and 4-chlorophenol by underwater pulsed discharge has been examined. The addition of hydrogen peroxide improved the decomposition rate of phenol by about 2.5 times and that of 4-chlorophenol by about 1.5 times. Analysis using a fluorescent probe suggested that the addition of hydrogen peroxide enhanced the production of hydroxyl radicals by about 3 times. We have also examined the effect of using microbubbles on the decomposition of phenol. The use of only microbubbles resulted in a slight increase of the decomposition rate, while the use of both microbubbles and hydrogen peroxide led to a remarkable enhancement of the decomposition rate by about 3.5 times with the conversion of phenol reaching 70% at discharge time of 3 h, which corresponded to the energy yield of 4.39 × 10â€"9 mol Jâˆ'1. [ABSTRACT FROM AUTHOR]

Published
2022
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