Effects of dissolved and ambient gases on sonochemical degradation of methylene blue in high-amplitude resonant mode

被引：11

作者：

Ogi, H ^{[1
]}

Tomiyama, Y ^{[1
]}

Shoji, Y ^{[1
]}

Mizugaki, T ^{[1
]}

Hirao, M ^{[1
]}

机构：

[1] Osaka Univ, Grad Sch Engn Sci, Toyonaka, Osaka 5608531, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS | 2006年 / 45卷 / 5B期

关键词：

sonochemistry; methylene blue; resonance; decomposition; ambient gas; dissolved gas;

D O I：

10.1143/JJAP.45.4678

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this paper, we show the dominant contribution of an ambient gas to sonochemical reactions in a high-amplitude acoustic resonant mode. A high-amplitude resonant mode in the solution was predicted by the three-layer resonator model, which showed an acoustic amplitude higher than the standard amplitude by a factor of 5. The high-amplitude resonance mode was used to decompose methylene blue in water. The effects of the dissolved gases and the ambient gases of argon, oxygen, and helium on the degradation efficiency were systematically studied using a closed resonant reactor. The maximum efficiency was achieved when the ambient gas was argon regardless of the dissolved gases. The replacement of dissolved gas with ambient gas is enhanced with high-amplitude ultrasonic irradiation.

引用

页码：4678 / 4683

页数：6

共 17 条

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