The role of ζ potential in the colloidal stability of different TiO2/electrolyte solution interfaces
The role of ζ potential in the colloidal stability of different TiO2/electrolyte solution interfaces
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DOI：
10.1016/s0927-7757(98)00763-8
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发表时间：
1999-03-31
影响因子：
5.2
通讯作者：
Nieves, FJD
中科院分区：
文献类型：
--
作者：
Fernández-Nieves, A;Nieves, FJD
本文研究了在几种电解液存在下，不同的二氧化钛/水界面的电动特性和胶体稳定性。在pH值为4、5.5和10.5时，测量了二氧化钛颗粒的电泳率随氯化钠、NaNO3、Na2SO4和CaCl2浓度的变化。借助O‘Brien和White的转换理论进行了Zeta势的计算。介质的pH值和离子的价态已被证明对我们的悬浮液电动行为有影响。用滤光仪和Korff指数对胶体稳定性进行了研究。确定了离子物种的不同絮凝特性，这对于采用我们的二氧化钛的太阳能光催化过程具有重要意义。(C)1999 Elsevier Science B.V.保留所有权利。
The present paper deals with the electrokinetic characterization and colloidal stability of different TiO2/water interfaces under the presence of several electrolytes. The electrophoretic mobility of the TiO2 particles was measured versus NaCl, NaNO3, Na2SO4 and CaCl2 concentrations, at pHs 4, 5.5 and 10.5. zeta Potential calculations have been carried out with the aid of O'Brien and Whites' conversion theory. The medium pH and the valence of the ions have proven to be of gnat influence in our suspension electrokinetic behaviour. The colloidal stability has been studied by means of the filers and Korff index. The different flocculant character of the ionic species has been established, which is of great importance in the solar photocatalytic process where our titanium dioxide is employed. (C) 1999 Elsevier Science B.V. All rights reserved.