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Fluorescence indicative pH drop in sonication
Alternative TitleColloid Surf. A-Physicochem. Eng. Asp.
Han, Yongsheng1,2; Shchukin, Dmitry1; Schneider, Julia1; Moehwald, Helmuth1
2014-03-20
Source PublicationCOLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
ISSN0927-7757
Volume445Issue:1Pages:30-33
AbstractSonication 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.; 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.
KeywordSonication Sonochemistry Fluorescein Ph Electrode
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.colsurfa.2013.12.061
URL查看原文
Indexed BySCI
Language英语
WOS KeywordSONOCHEMICAL DEGRADATION ; MECHANISTIC APPROACH ; ACOUSTIC CAVITATION ; AERATED WATER ; ULTRASOUND ; POLLUTANTS ; ELECTRODES ; FEATURES ; SENSORS ; BUBBLE
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
WOS IDWOS:000332436200004
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/8096
Collection研究所(批量导入)
Affiliation1.Max Planck Inst Colloids & Interfaces, Dept Interfaces, D-14424 Golm, Germany
2.Chinese Acad Sci, Inst Proc Engn, Beijing 100190, Peoples R China
Recommended Citation
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.
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