Application of a new photocatalytic nanomaterial obtained by Pulse Laser Ablation for Polychrome Paintings Conservation: a feasibility study

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Stefania Pasquale
http://orcid.org/0000-0003-1677-2331
Vittorio Privitera
http://orcid.org/0000-0002-9591-9858
Maria Miritello
http://orcid.org/0000-0001-7957-6763
Massimo Zimbone
http://orcid.org/0000-0003-4539-3998
Giuseppe Politi
http://orcid.org/0000-0003-3349-584X
Anna Maria Gueli
http://orcid.org/0000-0003-3339-7799

Abstract

This works aims to present a preliminary study about the application on painting of TiO2 nanoparticles for self-cleaning and protective purposes. We firstly assessed the photocatalytic activity of the TiO2 nanoparticles, obtained by Pulsed Laser Ablation, by the discoloration of dye. After, the colloidal dispersion is applied to painting samples prepared in laboratory, according to old recipes and using the most-used historical binders and pigments, in order to verify the cleaning efficiency by discoloration of the chromatic markers. The spectrophotometric analysis is performed studying the Spectral Reflectance Factor trend and the color coordinates.

Keywords: Conservation, Cleaning, Protection, Nanomaterial, Easel painting, Titanium dioxide

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