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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 origin

2018Journal article Restricted access
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dc.contributor.authorSaeli, Manfredi
dc.contributor.authorPiccirillo, Clara
dc.contributor.authorTobaldi, David M.
dc.contributor.authorBinions, Russell
dc.contributor.authorCastro, Paula M. L.
dc.contributor.authorPullar, Robert C.
dc.date.accessioned2018-10-22T11:46:18Z
dc.date.available2018-10-22T11:46:18Z
dc.date.issued2018
dc.description.abstractThe 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 HApbased photocatalyst contains only 1 wt% TiO2, the material usually used as a photocatalyst in construction materials. As we only add 1e5 wt% of our total HAp-based material to the mortar, this means our photocatalytic mortars only contain 0.01e0.05 wt% titania (100e500 ppm), two orders of magnitude less than the quantities of 2e10 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 6.3e8.3% 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.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationSaeli, M., Piccirillo, C., Tobaldi, D.M., Binions, R., Castro, P.M.L., Pullar, R.C. (2018). A sustainable replacement for TiO2 in photocatalyst construction materials: Hydroxyapatite-based photocatalytic additives, made from the valorisation of food wastes of marine origin. Journal of Cleaner Production, 193, 115-127pt_PT
dc.identifier.doi10.1016/j.jclepro.2018.05.030pt_PT
dc.identifier.eid85048012082
dc.identifier.eissn1879-1786
dc.identifier.issn0959-6526
dc.identifier.urihttp://hdl.handle.net/10400.14/25806
dc.identifier.wos000437997200009
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationIF/00681/2015pt_PT
dc.relationENVIRONMENTALLY SUSTAINABLE CERAMICS FOR APPLICATIONS AS MULTIFUNCTIONAL PHOTOCATALYST
dc.subjectSustainable materialpt_PT
dc.subjectPhotocatalysispt_PT
dc.subjectHydroxyapatitept_PT
dc.subjectWaste valorisationpt_PT
dc.subjectConstruction materialpt_PT
dc.subjectNHL mortarpt_PT
dc.titleA sustainable replacement for TiO2 in photocatalyst construction materials: Hydroxyapatite-based photocatalytic additives, made from the valorisation of food wastes of marine originpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleENVIRONMENTALLY SUSTAINABLE CERAMICS FOR APPLICATIONS AS MULTIFUNCTIONAL PHOTOCATALYST
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PEst-OE%2FEQB%2FLA0016%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FCTM%2F50011%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F86483%2F2012/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/FARH/SFRH%2FBPD%2F97115%2F2013/PT
oaire.citation.titleJournal of Cleaner Productionpt_PT
oaire.fundingStream3599-PPCDT
oaire.fundingStream5876
oaire.fundingStreamSFRH
oaire.fundingStreamFARH
person.familyNamePiccirillo
person.familyNameTobaldi
person.familyNameCastro
person.familyNamePullar
person.givenNameClara
person.givenNameDavid Maria
person.givenNamePaula
person.givenNameRobert
person.identifier962551
person.identifier2013444
person.identifier646900
person.identifier.ciencia-id391B-75ED-6983
person.identifier.ciencia-id6515-3493-6B27
person.identifier.ciencia-id7C1F-6C72-354A
person.identifier.ciencia-idD51F-B2C3-B82C
person.identifier.orcid0000-0002-6339-716X
person.identifier.orcid0000-0002-0112-8570
person.identifier.orcid0000-0001-8841-6606
person.identifier.orcid0000-0001-6844-4482
person.identifier.ridN-8206-2013
person.identifier.ridM-8241-2013
person.identifier.scopus-author-id7004621626
person.identifier.scopus-author-id16319626100
person.identifier.scopus-author-id7102781782
person.identifier.scopus-author-id7003296532
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
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