PHOTODEGRADATION OF SURFACTANTS .11. ZETA-POTENTIAL MEASUREMENTS IN THE PHOTOCATALYTIC OXIDATION OF SURFACTANTS IN AQUEOUS TIO2 DISPERSIONS

被引：141

作者：

ZHAO, JC

HIDAKA, H

TAKAMURA, A

PELIZZETTI, E

SERPONE, N

机构：

[1] MEISEI UNIV,DEPT CHEM,2-1-1 HODOKUBO,HINO,TOKYO 191,JAPAN

[2] MEIJI COLL PHARM,TANASHI,TOKYO 188,JAPAN

[3] UNIV TURIN,DIPARTIMENTO CHIM ANAL,I-10125 TURIN,ITALY

[4] CONCORDIA UNIV,DEPT CHEM & BIOCHEM,MONTREAL H3G 1M8,QUEBEC,CANADA

来源：

LANGMUIR | 1993年 / 9卷 / 07期

关键词：

D O I：

10.1021/la00031a008

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Since the adsorption of surfactants on TiO2 catalyst surface is one of the key factors affecting the photodegradation rate, the zeta-potentials of TiO2 particles in aqueous surfactant dispersions have been determined before and after illumination. The pH dependence of the zeta-potential was also examined. The zeta-potential of TiO2 particles shifted to the more positive value upon irradiation. Models of surfactant adsorption on the TiO2 surface are proposed. The anionic DBS (sodium dodecylbenzenesulfonate) was more easily adsorbed on the irradiated TiO2 surface and was degraded faster than the cationic BDDAC (benzyldodecyldimethylammonium chloride) surfactant.

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页码：1646 / 1650

页数：5

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