Sulfate Adsorption onto and Desorption from Silicon Dioxide Films

被引：2

作者：

Wu, Bing ^{[1
]}

Raghavan, Srini ^{[1
,2
]}

机构：

[1] Univ Arizona, Dept Chem & Environm Engn, Tucson, AZ 85721 USA

[2] Univ Arizona, Dept Mat Sci & Engn, Tucson, AZ 85721 USA

来源：

ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY | 2016年 / 5卷 / 05期

关键词：

PT(111) ELECTRODE; QUARTZ-CRYSTAL; FREQUENCY; ANIONS; MICROBALANCE; SURFACES; CONTACT; LIQUID; IONS;

D O I：

10.1149/2.0271605jss

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Sulfate ion adsorption onto and desorption from silicon dioxide surface has been investigated using a quartz crystal microbalance with dissipation monitoring capability (QCM-D). A viscoelastic model was used to calculate adsorption/desorption amount. Experimental results indicate that the adsorption from Na2SO4 and K2SO4 solutions at a pH of 6.8 results in the formation of a multilayer sulfate film with co-adsorption of Na+ or K+ ions. Sulfate ion uptake varied linearly with sulfate concentration in the range 0.01 M to 0.6 M. The first order rate constant for sulfate desorption with DI water is approximately 0.04 s(-1) and 0.12 s(-1) for flow rates of 0.2 ml/min and 1.0 ml/min, respectively. (C) 2016 The Electrochemical Society. All rights reserved.

引用

页码：N22 / N26

页数：5

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