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Article

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Title

Nano-TiO2-SiO2 powder as inorganic support for hybrid pigment preparation

Authors

[ 1 ] Instytut Technologii i Inżynierii Chemicznej, Wydział Technologii Chemicznej, Politechnika Poznańska | [ 2 ] Instytut Inżynierii Materiałowej, Wydział Budowy Maszyn i Zarządzania, Politechnika Poznańska | [ P ] employee

Scientific discipline (Law 2.0)

[2.8] Materials engineering
[7.6] Chemical sciences

Year of publication

2017

Published in

Advanced Powder Technology

Journal year: 2017 | Journal volume: vol. 28 | Journal number: iss. 5

Article type

scientific article

Publication language

english

Keywords
EN
  • hybrid pigments
  • TiO2-SiO2 support
  • diazo and triarylmethane food dyes
  • porous structure parameters
  • TGA/DTA
Abstract

EN A study was made of the adsorption of three selected food dyes (C.I. Food Black 1, C.I. Food Brown 3 and C.I. Food Green 4) on the surface of an inorganic, synthetic TiO2-SiO2 support of anatase form. This produces new hybrid pigments having desirable physicochemical and functional properties due to the presence in their structure of the TiO2-SiO2 support. The process of adsorption was conducted for dye concentrations ranging from 10 to 50 mg/dm3. The physicochemical properties of the inorganic support and the resulting hybrid pigments were determined. The characterisation included determination of the dispersion and morphology of the systems (particle size distribution, SEM images), porous structure parameters (BET isotherms) and electrokinetic properties (zeta potential and electrophoretic mobility), as well as thermal stability and colorimetric parameters. The efficiency of food dye adsorption on TiO2-SiO2 was examined, and the degree of coverage of the inorganic support with the food dyes was also estimated based on elemental analysis results. The results were used to evaluate the quality of the functional hybrid pigments obtained using selected food dyes and TiO2-SiO2 support, and to determine how the adsorption efficiency is affected by the dye structure. Selected diazo food dyes were more effectively adsorbed on the surface of the synthetic TiO2-SiO2 support. The hybrid pigments obtained have desirable physicochemical and functional properties. The synthesised food dye/TiO2-SiO2 hybrids may be used in pharmaceutical products.

Date of online publication

28.02.2017

Pages (from - to)

1298 - 1308

DOI

10.1016/j.apt.2017.02.018

URL

https://www.sciencedirect.com/science/article/abs/pii/S0921883117300961

Ministry points / journal

30

Ministry points / journal in years 2017-2021

30

Impact Factor

2,943

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