A sustainable replacement for TiO2 in photocatalyst construction materials: hydroxyapatite-based photocatalytic additives, made from the valorisation of food wastes of marine origin
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10773/36714 |
Resumo: | The use of waste materials and by-products in building materials is of increasing importance to improve sustainability in construction, as is the incorporation of photocatalytic materials to both combat atmospheric pollution and protect the structures and façades. This work reports the innovative use of photocatalytic hydroxyapatite (HAp) based powders, derived from Atlantic codfish bone wastes, as an additive to natural hydraulic lime mortars. HAp is the main component of bone, and hence is non-toxic and biocompatible. This is the first time that such a calcium phosphate-based photocatalyst, or indeed any fish/marine derived wastes, have been added to building materials. A key factor is that this HAp-based photocatalyst contains only 1 wt% TiO2, the material usually used as a photocatalyst in construction materials. As we only add 1–5 wt% of our total HAp-based material to the mortar, this means our photocatalytic mortars only contain 0.01–0.05 wt% titania (100–500 ppm), two orders of magnitude less than the quantities of 2–10 wt% TiO2 which are usually needed. Our photocatalyst is made from a sustainable waste stream by simple solution and thermal processing, and thus with a much smaller impact on the environment. Specimens were made by either traditional intermixing techniques, or by a post-curing coating procedure. All showed gas-phase photocatalytic activity for abatement of NOx pollutants under solar light. With intermixing, NOx abatement of 6.3–8.3% was observed. However, for coated mortars, superior NOx conversion rates were achieved of 7.1% and 23.8%, with 1 and 5 wt% additions, respectively. These results show the potential of this naturally-derived photocatalyst for applications in the construction industry, leading to lower atmospheric pollution and the creation of more durable/lower maintenance building façades, and environmentally sustainable materials for the preservation of cultural heritage. |
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A sustainable replacement for TiO2 in photocatalyst construction materials: hydroxyapatite-based photocatalytic additives, made from the valorisation of food wastes of marine originSustainable materialPhotocatalysisHydroxyapatiteWaste valorisationConstruction materialNHL mortarThe use of waste materials and by-products in building materials is of increasing importance to improve sustainability in construction, as is the incorporation of photocatalytic materials to both combat atmospheric pollution and protect the structures and façades. This work reports the innovative use of photocatalytic hydroxyapatite (HAp) based powders, derived from Atlantic codfish bone wastes, as an additive to natural hydraulic lime mortars. HAp is the main component of bone, and hence is non-toxic and biocompatible. This is the first time that such a calcium phosphate-based photocatalyst, or indeed any fish/marine derived wastes, have been added to building materials. A key factor is that this HAp-based photocatalyst contains only 1 wt% TiO2, the material usually used as a photocatalyst in construction materials. As we only add 1–5 wt% of our total HAp-based material to the mortar, this means our photocatalytic mortars only contain 0.01–0.05 wt% titania (100–500 ppm), two orders of magnitude less than the quantities of 2–10 wt% TiO2 which are usually needed. Our photocatalyst is made from a sustainable waste stream by simple solution and thermal processing, and thus with a much smaller impact on the environment. Specimens were made by either traditional intermixing techniques, or by a post-curing coating procedure. All showed gas-phase photocatalytic activity for abatement of NOx pollutants under solar light. With intermixing, NOx abatement of 6.3–8.3% was observed. However, for coated mortars, superior NOx conversion rates were achieved of 7.1% and 23.8%, with 1 and 5 wt% additions, respectively. These results show the potential of this naturally-derived photocatalyst for applications in the construction industry, leading to lower atmospheric pollution and the creation of more durable/lower maintenance building façades, and environmentally sustainable materials for the preservation of cultural heritage.Elsevier2023-03-29T13:47:53Z2018-08-20T00:00:00Z2018-08-20info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/36714eng0959-652610.1016/j.jclepro.2018.05.030Saeli, ManfrediPiccirillo, ClaraTobaldi, David M.Binions, RussellCastro, Paula M.L.Pullar, Robert C.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-02-22T12:10:49Zoai:ria.ua.pt:10773/36714Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:07:26.611559Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
A sustainable replacement for TiO2 in photocatalyst construction materials: hydroxyapatite-based photocatalytic additives, made from the valorisation of food wastes of marine origin |
title |
A sustainable replacement for TiO2 in photocatalyst construction materials: hydroxyapatite-based photocatalytic additives, made from the valorisation of food wastes of marine origin |
spellingShingle |
A sustainable replacement for TiO2 in photocatalyst construction materials: hydroxyapatite-based photocatalytic additives, made from the valorisation of food wastes of marine origin Saeli, Manfredi Sustainable material Photocatalysis Hydroxyapatite Waste valorisation Construction material NHL mortar |
title_short |
A sustainable replacement for TiO2 in photocatalyst construction materials: hydroxyapatite-based photocatalytic additives, made from the valorisation of food wastes of marine origin |
title_full |
A sustainable replacement for TiO2 in photocatalyst construction materials: hydroxyapatite-based photocatalytic additives, made from the valorisation of food wastes of marine origin |
title_fullStr |
A sustainable replacement for TiO2 in photocatalyst construction materials: hydroxyapatite-based photocatalytic additives, made from the valorisation of food wastes of marine origin |
title_full_unstemmed |
A sustainable replacement for TiO2 in photocatalyst construction materials: hydroxyapatite-based photocatalytic additives, made from the valorisation of food wastes of marine origin |
title_sort |
A sustainable replacement for TiO2 in photocatalyst construction materials: hydroxyapatite-based photocatalytic additives, made from the valorisation of food wastes of marine origin |
author |
Saeli, Manfredi |
author_facet |
Saeli, Manfredi Piccirillo, Clara Tobaldi, David M. Binions, Russell Castro, Paula M.L. Pullar, Robert C. |
author_role |
author |
author2 |
Piccirillo, Clara Tobaldi, David M. Binions, Russell Castro, Paula M.L. Pullar, Robert C. |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Saeli, Manfredi Piccirillo, Clara Tobaldi, David M. Binions, Russell Castro, Paula M.L. Pullar, Robert C. |
dc.subject.por.fl_str_mv |
Sustainable material Photocatalysis Hydroxyapatite Waste valorisation Construction material NHL mortar |
topic |
Sustainable material Photocatalysis Hydroxyapatite Waste valorisation Construction material NHL mortar |
description |
The use of waste materials and by-products in building materials is of increasing importance to improve sustainability in construction, as is the incorporation of photocatalytic materials to both combat atmospheric pollution and protect the structures and façades. This work reports the innovative use of photocatalytic hydroxyapatite (HAp) based powders, derived from Atlantic codfish bone wastes, as an additive to natural hydraulic lime mortars. HAp is the main component of bone, and hence is non-toxic and biocompatible. This is the first time that such a calcium phosphate-based photocatalyst, or indeed any fish/marine derived wastes, have been added to building materials. A key factor is that this HAp-based photocatalyst contains only 1 wt% TiO2, the material usually used as a photocatalyst in construction materials. As we only add 1–5 wt% of our total HAp-based material to the mortar, this means our photocatalytic mortars only contain 0.01–0.05 wt% titania (100–500 ppm), two orders of magnitude less than the quantities of 2–10 wt% TiO2 which are usually needed. Our photocatalyst is made from a sustainable waste stream by simple solution and thermal processing, and thus with a much smaller impact on the environment. Specimens were made by either traditional intermixing techniques, or by a post-curing coating procedure. All showed gas-phase photocatalytic activity for abatement of NOx pollutants under solar light. With intermixing, NOx abatement of 6.3–8.3% was observed. However, for coated mortars, superior NOx conversion rates were achieved of 7.1% and 23.8%, with 1 and 5 wt% additions, respectively. These results show the potential of this naturally-derived photocatalyst for applications in the construction industry, leading to lower atmospheric pollution and the creation of more durable/lower maintenance building façades, and environmentally sustainable materials for the preservation of cultural heritage. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-08-20T00:00:00Z 2018-08-20 2023-03-29T13:47:53Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10773/36714 |
url |
http://hdl.handle.net/10773/36714 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0959-6526 10.1016/j.jclepro.2018.05.030 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799137729387167744 |