Adsorption of Dyes on Nanosize Modified Silica Particles

The adsorption of several anionic dyes on nanosize alumina-modified silica particles of different compositions and modal sizes has been studied. These silica cores have the same surface properties as alumina dispersed in aqueous solutions. The negatively charged dyes are electrostatically attracted...

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Veröffentlicht in:	Journal of colloid and interface science 1997-11, Vol.195 (1), p.222-228
Hauptverfasser:	Wu, Guangwei, Koliadima, Athanasia, Her, Yie-Shein, Matijević, Egon
Format:	Artikel
Sprache:	eng
Schlagworte:	adsorption of dyes Chemistry color films Exact sciences and technology General and physical chemistry nanosize pigments silica/dye pigments Solid-liquid interface Surface physical chemistry
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Beschreibung
Zusammenfassung:	The adsorption of several anionic dyes on nanosize alumina-modified silica particles of different compositions and modal sizes has been studied. These silica cores have the same surface properties as alumina dispersed in aqueous solutions. The negatively charged dyes are electrostatically attracted to positively charged cores and chemisorbed by forming a surface Al lake. The application of so obtained pigments in the preparation of color films and their optical characteristics are described.
ISSN:	0021-9797 1095-7103
DOI:	10.1006/jcis.1997.5156