Active photocatalytic-superhydrophobic coating with TiO2-ZnO nano-heterostructures for lime mortars

Active 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 ligh...

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Autores: Speziale, A. (Alessandro)|||/items/6862059a-2892-4b6c-bf83-99516bbe939e, Gonzalez-Sanchez, J.F. (Jesús Fidel)|||/items/bab21af5-7bcf-4861-93a8-e461da9208b3, Navarro-Blasco, I. (Iñigo)|||/items/733b109b-1074-49e9-8952-70ec6928cc54, Fernandez-Alvarez, J.M. (José María)|||/items/1dea5bde-978e-46db-8871-8d426cbb52c8, Alvarez-Galindo, J.I. (José Ignacio)|||/items/c88ef755-513c-4ff3-bbff-44aadbf32204
Tipo de recurso: capítulo de libro
Fecha de publicación:2019
País:España
Institución:Universidad de Navarra
Repositorio:Dadun. Depósito Académico Digital de la Universidad de Navarra
Idioma:inglés
OAI Identifier:oai:dadun.unav.edu:10171/58024
Acceso en línea:https://hdl.handle.net/10171/58024
Access Level:acceso abierto
Palabra clave:Lime mortars
Nanoparticles
Photocatalytic activity
Coatings
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spelling Active photocatalytic-superhydrophobic coating with TiO2-ZnO nano-heterostructures for lime mortarsSpeziale, A. (Alessandro)|||/items/6862059a-2892-4b6c-bf83-99516bbe939eGonzalez-Sanchez, J.F. (Jesús Fidel)|||/items/bab21af5-7bcf-4861-93a8-e461da9208b3Navarro-Blasco, I. (Iñigo)|||/items/733b109b-1074-49e9-8952-70ec6928cc54Fernandez-Alvarez, J.M. (José María)|||/items/1dea5bde-978e-46db-8871-8d426cbb52c8Alvarez-Galindo, J.I. (José Ignacio)|||/items/c88ef755-513c-4ff3-bbff-44aadbf32204Lime mortarsNanoparticlesPhotocatalytic activityCoatingsActive 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.RILEM Publications S.a.r.l.Dadun. Depósito Académico Digital Universidad de Navarra20192019-07-2220192019-07-1620192019-07-16book parthttp://purl.org/coar/resource_type/c_3248info:eu-repo/semantics/bookPartapplication/pdfhttps://hdl.handle.net/10171/58024reponame:Dadun. Depósito Académico Digital de la Universidad de Navarrainstname:Universidad de NavarraInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:dadun.unav.edu:10171/580242026-06-21T12:47:57Z
dc.title.none.fl_str_mv Active photocatalytic-superhydrophobic coating with TiO2-ZnO nano-heterostructures for lime mortars
title Active photocatalytic-superhydrophobic coating with TiO2-ZnO nano-heterostructures for lime mortars
spellingShingle Active photocatalytic-superhydrophobic coating with TiO2-ZnO nano-heterostructures for lime mortars
Speziale, A. (Alessandro)|||/items/6862059a-2892-4b6c-bf83-99516bbe939e
Lime mortars
Nanoparticles
Photocatalytic activity
Coatings
title_short Active photocatalytic-superhydrophobic coating with TiO2-ZnO nano-heterostructures for lime mortars
title_full Active photocatalytic-superhydrophobic coating with TiO2-ZnO nano-heterostructures for lime mortars
title_fullStr Active photocatalytic-superhydrophobic coating with TiO2-ZnO nano-heterostructures for lime mortars
title_full_unstemmed Active photocatalytic-superhydrophobic coating with TiO2-ZnO nano-heterostructures for lime mortars
title_sort Active photocatalytic-superhydrophobic coating with TiO2-ZnO nano-heterostructures for lime mortars
dc.creator.none.fl_str_mv Speziale, A. (Alessandro)|||/items/6862059a-2892-4b6c-bf83-99516bbe939e
Gonzalez-Sanchez, J.F. (Jesús Fidel)|||/items/bab21af5-7bcf-4861-93a8-e461da9208b3
Navarro-Blasco, I. (Iñigo)|||/items/733b109b-1074-49e9-8952-70ec6928cc54
Fernandez-Alvarez, J.M. (José María)|||/items/1dea5bde-978e-46db-8871-8d426cbb52c8
Alvarez-Galindo, J.I. (José Ignacio)|||/items/c88ef755-513c-4ff3-bbff-44aadbf32204
author Speziale, A. (Alessandro)|||/items/6862059a-2892-4b6c-bf83-99516bbe939e
author_facet Speziale, A. (Alessandro)|||/items/6862059a-2892-4b6c-bf83-99516bbe939e
Gonzalez-Sanchez, J.F. (Jesús Fidel)|||/items/bab21af5-7bcf-4861-93a8-e461da9208b3
Navarro-Blasco, I. (Iñigo)|||/items/733b109b-1074-49e9-8952-70ec6928cc54
Fernandez-Alvarez, J.M. (José María)|||/items/1dea5bde-978e-46db-8871-8d426cbb52c8
Alvarez-Galindo, J.I. (José Ignacio)|||/items/c88ef755-513c-4ff3-bbff-44aadbf32204
author_role author
author2 Gonzalez-Sanchez, J.F. (Jesús Fidel)|||/items/bab21af5-7bcf-4861-93a8-e461da9208b3
Navarro-Blasco, I. (Iñigo)|||/items/733b109b-1074-49e9-8952-70ec6928cc54
Fernandez-Alvarez, J.M. (José María)|||/items/1dea5bde-978e-46db-8871-8d426cbb52c8
Alvarez-Galindo, J.I. (José Ignacio)|||/items/c88ef755-513c-4ff3-bbff-44aadbf32204
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Dadun. Depósito Académico Digital Universidad de Navarra
dc.subject.none.fl_str_mv Lime mortars
Nanoparticles
Photocatalytic activity
Coatings
topic Lime mortars
Nanoparticles
Photocatalytic activity
Coatings
description Active 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.
publishDate 2019
dc.date.none.fl_str_mv 2019
2019-07-22
2019
2019-07-16
2019
2019-07-16
dc.type.none.fl_str_mv book part
http://purl.org/coar/resource_type/c_3248
dc.type.openaire.fl_str_mv info:eu-repo/semantics/bookPart
format bookPart
dc.identifier.none.fl_str_mv https://hdl.handle.net/10171/58024
url https://hdl.handle.net/10171/58024
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv RILEM Publications S.a.r.l.
publisher.none.fl_str_mv RILEM Publications S.a.r.l.
dc.source.none.fl_str_mv reponame:Dadun. Depósito Académico Digital de la Universidad de Navarra
instname:Universidad de Navarra
instname_str Universidad de Navarra
reponame_str Dadun. Depósito Académico Digital de la Universidad de Navarra
collection Dadun. Depósito Académico Digital de la Universidad de Navarra
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300724

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