Effects of Oxygen Microbubbles on Photoresist Layers under Hot Water Conditions

Takahashi, Masayoshi; Shirai, Yoshihito; Teramoto, Akinobu; Takahashi, Tunejirou; Tatera, Katsumi; Matsuura, Kouhei; Horibe, Hideo

doi:10.2494/photopolymer.29.643

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Decomposition Of 4-chlorophenol and Phenol By Underwater Pul...1

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“…The details of MBs generation system have been described elsewhere. [24][25][26][27][28] Pressure for MBs generation was set to 5 MPa. When investigating the effect of MBs, MBs was first generated in pure water to avoid the vaporization of phenol during the preparation process of MBs.…”

Section: Decomposition Of 4-chlorophenol and Phenol By Underwater Pul...mentioning

confidence: 99%

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

Matsuura

Kometani

Horibe

et al. 2021

Jpn. J. Appl. Phys.

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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 × 10–9 mol J−1.

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