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Journal of Nanomaterials
Volume 2014, Article ID 185080, 11 pages
http://dx.doi.org/10.1155/2014/185080
Research Article

Evaluation of the Particle Aerosolization from n-TiO2 Photocatalytic Nanocoatings under Abrasion

1Institut National de l’Environnement Industriel et des Risques (INERIS), Parc Technologique Alata BP 2, 60550 Verneuil-en-Halatte, France
2Université de Technologie de Compiègne (UTC), rue Roger Coutollenc, 60200 Compiègne, France

Received 20 December 2013; Accepted 27 March 2014; Published 6 May 2014

Academic Editor: Godwin Ayoko

Copyright © 2014 Neeraj Shandilya et al. 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.

Abstract

A parametric study on the release of titanium dioxide (TiO2) nanoparticles from two commercial photocatalytic nanocoatings is carried out. For this, abrasion tests are performed on them. The formed aerosols are characterized by their number concentration, particle size distribution, individual particle shape, size, and chemical composition. The two nanocoatings appear to exhibit contrastingly opposite behavior with respect to the number concentration of the released particles. Having irregular shapes, the released particles are found to have unimodal size distributions with 1.5–3.5% (in mass) of Ti content. However, no free nanoparticles of TiO2 were found. Distinct phases during the particle number concentration evolution with time are also discussed and evaluated. Two quantities— and —are identified as the important indicators to qualitatively measure the resistance strength and hence the concentration of the released particles from a nanocoating during stress application.