atticon9903 VI-C-60

atticon9903 VI-C-60
Photocatalytic coatings by N-doped titania for carbonatic stones.
Bergamonti L. (1 ), Bondioli F. (1 ), Predieri G. (2 ), Paz Y. (3 ), Fornasini L. (4 ),
Lottici P.P. (4 )
(1 ) Dipartimento di Ingegneria Industriale, Università di Parma
(2 ) Dipartimento di Chimica, Università di Parma
(3 ) Department of Chemical Engineering, Technion city, Haifa, Israel
(4 ) Dipartimento di Fisica e Scienze della Terra, Università di Parma
Titania nanoparticles are the most widely studied photocatalytic material and may give
promising self-cleaning coatings for Cultural Heritage applications. To increase the photocatalytic performances of nanocrystalline titania, doping by non-metal elements to reduce
the band-gap is employed. Here we report on a test of a self-cleaning coating for carbonatic
stones based on N-doped titania nanoparticles by sol-gel. The nanoparticles were characterized by X-ray diffraction, UV-VIS, Raman and X-ray photoelectron spectroscopies. The
self-cleaning efficacy and the contact angle of the coating was evaluated on carbonatic stones,
by the photocatalytic oxidation of some organic dyes under solar lamp irradiation.
Support from MAECI, project NANO4HER, Italy-Israel Scientific and Technological Cooperation.