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dc.creatorSpeziale, A. (Alessandro)-
dc.creatorGonzalez-Sanchez, J.F. (Jesús Fidel)-
dc.creatorNavarro-Blasco, I. (Iñigo)-
dc.creatorFernandez-Alvarez, J.M. (José María)-
dc.creatorAlvarez-Galindo, J. I. (José Ignacio)-
dc.identifier.citationSpeziale A, González-Sánchez JF, Navarro-Blasco I, Fernández JM, Álvarez JI "Active photocatalytic-superhydrophobic coating with TiO2-ZnO nano-heterostructures for lime mortars" in "5th Historic Mortars Conference", RILEM Publications S.a.r.l., Paris, 2019, RILEM Proceedings PRO 130, p 155-168es_ES
dc.identifier.othere-ISBN: 978-2-35158-222-0-
dc.description.abstractActive coatings to be applied onto hardened surfaces of lime rendering and masonry mortars and stones of the Built Heritage were developed. Nano-heterostructures of TiO2/ZnO (50:50 and 10:90) were obtained by Flame Spray Pyrolysis as photocatalytic agents with expanded sensitivity towards solar light, instead of the restricted UV dependence of the pure TiO2 or ZnO. A superhydrophobic medium was simultaneously prepared and photocatalytic nanoparticles were added to obtain the coatings. The active products were expected to prevent the water absorption of the substrates and the subsequent degradation effects as well as to allow the stones and mortars to act as self-cleaning materials, reducing the dirt deposition and the biological colonization. Dispersions were applied onto the surface of lime mortars and siliceous stone. Measurements of the photocatalytic oxidation activity of the coatings were carried out by means of the NO degradation, showing a very good efficiency of the nanoparticles even at long term tests (values of NO oxidation of ca. 35%). Water contact angle assessment evidenced a strong hydrophobization of the treated surfaces, with WCA values higher than 140⁰. The results proved the synergistic effect of these coatings with respect to the durability of the treated substrates, giving rise to a promising way of preventive conservation for building materials of the Cultural Heritage.es_ES
dc.description.sponsorshipFunded by MINECO under Project MAT2015-70728-P, and by the Government of Navarra under grant number Exp. 0011-1383-2018-000005, project PC065 RECURBAN. A. Speziale is a Research Training Program student and J.F. González-Sánchez thanks the Friends of the University of Navarra, Inc., for a pre-doctoral grant.es_ES
dc.publisherRILEM Publications S.a.r.l.es_ES
dc.subjectLime mortarses_ES
dc.subjectPhotocatalytic activityes_ES
dc.titleActive photocatalytic-superhydrophobic coating with TiO2-ZnO nano-heterostructures for lime mortarses_ES
dc.typeCapitulo de libroes_ES

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