Fluorescence indicative pH drop in sonication

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	Fluorescence indicative pH drop in sonication
	Han, Yongsheng 1,2; Shchukin, Dmitry 1; Schneider, Julia 1; Moehwald, Helmuth 1
刊名	COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
	2014-03-20
卷号	445 期号:1 页码:30-33
关键词	Sonication Sonochemistry Fluorescein pH Electrode
ISSN号	0927-7757
其他题名	Colloid Surf. A-Physicochem. Eng. Asp.
中文摘要	Sonication induces complex chemical and physical phenomena in solution, which attracted great attentions to discover the mechanisms behind these phenomena. One of these phenomena is the pH drop in sonication, which was usually attributed to the formation of nitrate and nitrite acid in sonication. However, the pH drop detected by electrodes was questioned since the sonication could enhance proton transfer on the surface of pH electrode, resulting in a false pH drop. Therefore, it is necessary to initiate a tour study on this issue. In this paper, we firstly investigate two new factors, namely CO2 dissolution and temperature, which have the possibility to induce the pH drop in sonication. The results demonstrate that both factors play a minor role on the pH drop. Then we employ pH sensitive dyes to replace the questioned pH electrode to detect the change of proton concentration in sonication. The results indicate that the pH drop is accompanied with the protonation of fluorescein, indicating production of hydrogen ions in sonication. The quantitative analysis of proton production suggests that the pH drop in sonication is mainly caused by the formation of hydrogen ions, which clarify the reason for the pH drop in sonication. (c) 2014 Elsevier B.V. All rights reserved.
英文摘要	Sonication induces complex chemical and physical phenomena in solution, which attracted great attentions to discover the mechanisms behind these phenomena. One of these phenomena is the pH drop in sonication, which was usually attributed to the formation of nitrate and nitrite acid in sonication. However, the pH drop detected by electrodes was questioned since the sonication could enhance proton transfer on the surface of pH electrode, resulting in a false pH drop. Therefore, it is necessary to initiate a tour study on this issue. In this paper, we firstly investigate two new factors, namely CO2 dissolution and temperature, which have the possibility to induce the pH drop in sonication. The results demonstrate that both factors play a minor role on the pH drop. Then we employ pH sensitive dyes to replace the questioned pH electrode to detect the change of proton concentration in sonication. The results indicate that the pH drop is accompanied with the protonation of fluorescein, indicating production of hydrogen ions in sonication. The quantitative analysis of proton production suggests that the pH drop in sonication is mainly caused by the formation of hydrogen ions, which clarify the reason for the pH drop in sonication. (c) 2014 Elsevier B.V. All rights reserved.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Chemistry, Physical
研究领域[WOS]	Chemistry
关键词[WOS]	SONOCHEMICAL DEGRADATION ; MECHANISTIC APPROACH ; ACOUSTIC CAVITATION ; AERATED WATER ; ULTRASOUND ; POLLUTANTS ; ELECTRODES ; FEATURES ; SENSORS ; BUBBLE
收录类别	SCI
原文出处	://WOS:000332436200004
语种	英语
WOS记录号	WOS:000332436200004
公开日期	2014-05-06
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/8096]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.Max Planck Inst Colloids & Interfaces, Dept Interfaces, D-14424 Golm, Germany 2.Chinese Acad Sci, Inst Proc Engn, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Han, Yongsheng,Shchukin, Dmitry,Schneider, Julia,et al. Fluorescence indicative pH drop in sonication[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2014,445(1):30-33.
APA	Han, Yongsheng,Shchukin, Dmitry,Schneider, Julia,&Moehwald, Helmuth.(2014).Fluorescence indicative pH drop in sonication.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,445(1),30-33.
MLA	Han, Yongsheng,et al."Fluorescence indicative pH drop in sonication".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 445.1(2014):30-33.