Preparation of hybrid pigments via adsorption of selected food dyes onto inorganic oxides based on anatase titanium dioxide

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• 作者：Katarzyna Siwiń ; ska-Stefań ; ska ; Magdalena Nowacka ; Agnieszka Koł ; odziejczak-Radzimska ; Teofil Jesionowski ; ^{teofil.jesionowski@put.poznan.pl}
• 关键词：TiO2 ; TiO2&ndash ; SiO2 oxide composite ; Hybrid pigments ; Food dyes ; Adsorption process ; Zeta potential
• 刊名：Dyes and Pigments
• 出版年：2012
• 期刊代码：31_01437208
• 类别：ms
• 出版时间：August, 2012
• 卷：94
• 期：2
• 页码：338-348
• 文件大小：1204 K

摘要

The paper reports on a characterisation of hybrid pigments obtained via adsorption of selected food dyes onto inorganic oxides based on anatase titanium dioxide. The process of adsorption was conducted for dye concentrations varying from 10 to 50聽mg/dm³. The physicochemical properties of the inorganic supports and hybrid pigments obtained were determined. Particle size distribution and surface morphology, and adsorptive as well as electrokinetic properties (zeta potential) of the above products were evaluated. The efficiency of food dye adsorption on TiO₂ or TiO₂-SiO₂ was examined and the degree of coverage of the inorganic supports with the food dyes was also estimated from elemental analysis. The synthesised food dye/titania support hybrids can be used in pharmaceutical products.