RESIDUAL VARIATIONS IN THE ZETA-POTENTIAL OF TIO2 (ANATASE) SUSPENSIONS AS A RESULT OF EXPOSURE TO RADIOFREQUENCY ELECTRIC-FIELDS

被引：33

作者：

CHIBOWSKI, E ^{[1
]}

GOPALAKRISHNAN, S ^{[1
]}

BUSCH, MA ^{[1
]}

BUSCH, KW ^{[1
]}

机构：

[1] BAYLOR UNIV,DEPT CHEM,WACO,TX 76798

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 1990年 / 139卷 / 01期

关键词：

D O I：

10.1016/0021-9797(90)90443-R

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Suspensions of TiO2 (anatase) powder in both deionized water and dilute NaCl solutions were exposed to a radiofrequency (RF) electric field with a peak-to-peak, no-load amplitude of 34 V and a frequency of 44 MHz. Examination of the suspension after various exposure times revealed that significant changes in zeta potential, pH, and solution conductivity occurred as a result of treatment by the RF field. Under the conditions employed in this study, the maximum decrease in zeta potential for the TiO2 suspensions occurred after approximately 30 min of exposure time. Oscillatory variations in the zeta potential were also observed to persist for periods of at least 90 min after the radiofrequency field had been removed. The changes in zeta potential observed during these studies are discussed in terms of interfacial polarization and residual, field-induced changes in the TiO2 particles. © 1990.

引用

页码：43 / 54

页数：12

共 25 条

[1] DIELECTRIC DISPERSIONS OF COLLOIDAL PARTICLES IN AQUEOUS SUSPENSIONS WITH LOW IONIC-CONDUCTIVITY [J].