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Design of novel photocatalytic films for the protection of architectural surfaces via the incorporation of green photocatalysts

Stefanakis Dimitrios, Krasoudaki Themis, Kaditis Anastasios-Ioannis, Bakolas Asterios, Maravelaki Pagona

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URIhttp://purl.tuc.gr/dl/dias/7BC144B4-F17B-41A9-976F-6F0D4A09E78C-
Identifierhttps://doi.org/10.3390/coatings11080934-
Identifierhttps://www.mdpi.com/2079-6412/11/8/934/htm-
Languageen-
Extent18 pagesen
TitleDesign of novel photocatalytic films for the protection of architectural surfaces via the incorporation of green photocatalystsen
CreatorStefanakis Dimitriosen
CreatorKrasoudaki Themisen
CreatorΚρασουδακη Θεμιςel
CreatorKaditis Anastasios-Ioannisen
CreatorΚαδιτης Αναστασιος-Ιωαννηςel
CreatorBakolas Asteriosen
CreatorMaravelaki Pagonaen
CreatorΜαραβελακη Παγωναel
PublisherMDPIen
Content SummaryIn conservation science the demand of multifunctional green materials displaying water repellency, consolidation, resistance to organic pollutants and pigments is constantly increasing. This research developed a green nanocomposite exhibiting photocatalytic, hydrophobic, consolidation and self-cleaning properties. This was achieved by synthesizing a TiO2 photocatalyst enriched with carbon dots (C-dots) and successfully incorporated into a tetraethoxysilane nanocomposite modified with nano-calcium oxalate and polydimethylsiloxane. The TiO2/C-dots that were prepared with a simple, low temperature, cost-effective and large-scale procedure were assessed via analytical and spectroscopic techniques and were resulted in anatase structure ranging in size from 10 to 40 nm. Photooxidation measurements displayed that TiO2/C-dots nanoparticles could photodegrade completely Methyl Orange (MO) under UV and visible irradiation after 120 min. The photocatalytic performance of the nanocomposite with TiO2/C-dots resulted promising under UV after longer irradiation time. The degradation of MO was faster on bulk xerogels containing the TiO2/C-dots than the corresponding ones with TiO2. The treatment of concrete, limestone and lime mortars with the nanocomposite proved to be compatible with the substrates in terms of aesthetical aspects. This study demonstrates encouraging potential for large-scale production of a multifunctional protective composite that offers hydrophobicity, self-cleaning properties and consolidation to architectural surfaces.en
Type of ItemPeer-Reviewed Journal Publicationen
Type of ItemΔημοσίευση σε Περιοδικό με Κριτέςel
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2022-10-13-
Date of Publication2021-
SubjectPhotodegradationen
SubjectNanotitania TiO2en
SubjectPhotocatalytic activityen
SubjectCarbon dots (C-dots)en
SubjectSelf-cleaningen
SubjectProtective filmsen
Bibliographic CitationD. Stefanakis, T. Krasoudaki, A.-I. Kaditis, A. Bakolas, and P.-N. Maravelaki, “Design of novel photocatalytic films for the protection of architectural surfaces via the incorporation of green photocatalysts,” Coatings, vol. 11, no. 8, Aug. 2021, doi: 10.3390/coatings11080934.en

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