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Materials 2015, 8(11), 7988-7996; doi:10.3390/ma8115437

TiO2 Nanosols Applied Directly on Textiles Using Different Purification Treatments

Institute of Science and Technology for Ceramics—Italian National Research Council, Via Granarolo 64, Faenza (RA) I-48018, Italy
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Academic Editor: Fernão Magalhães
Received: 16 September 2015 / Revised: 28 October 2015 / Accepted: 16 November 2015 / Published: 24 November 2015
(This article belongs to the Special Issue Self-Cleaning and Antimicrobial Surfaces)
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Abstract

Self-cleaning applications using TiO2 coatings on various supporting media have been attracting increasing interest in recent years. This work discusses the issue of self-cleaning textile production on an industrial scale. A method for producing self-cleaning textiles starting from a commercial colloidal nanosuspension (nanosol) of TiO2 is described. Three different treatments were developed for purifying and neutralizing the commercial TiO2 nanosol: washing by ultrafiltration; purifying with an anion exchange resin; and neutralizing in an aqueous solution of ammonium bicarbonate. The different purified TiO2 nanosols were characterized in terms of particle size distribution (using dynamic light scattering), electrical conductivity, and ζ potential (using electrophoretic light scattering). The TiO2-coated textiles’ functional properties were judged on their photodegradation of rhodamine B (RhB), used as a stain model. The photocatalytic performance of the differently treated TiO2-coated textiles was compared, revealing the advantages of purification with an anion exchange resin. The study demonstrated the feasibility of applying commercial TiO2 nanosol directly on textile surfaces, overcoming problems of existing methods that limit the industrial scalability of the process. View Full-Text
Keywords: nano-TiO2; purification process; anion exchange resin; photocatalytic performance nano-TiO2; purification process; anion exchange resin; photocatalytic performance
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Ortelli, S.; Costa, A.L.; Dondi, M. TiO2 Nanosols Applied Directly on Textiles Using Different Purification Treatments. Materials 2015, 8, 7988-7996.

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