http://www.cnr.it/ontology/cnr/individuo/prodotto/ID289974

Multiple approach to test nano TiO2 photo-activity (Articolo in rivista)

Type

Prodotto della ricerca (Classe)
Articolo in rivista (Classe)

Label

Multiple approach to test nano TiO2 photo-activity (Articolo in rivista) (literal)

Anno

2014-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

10.1016/j.jphotochem.2014.07.006 (literal)

Alternative label

Ortelli, Simona; Blosi, Magda; Delpivo, Camilla; Gardini, Davide; Dondi, Michele; Gualandi, Isacco; Tonelli, Domenica; Aina, Valentina O.; Fenoglio, Ivana; Gandhi, Abbasi A.; Tofail, Syed A M; Costa, Anna Luisa (2014)
Multiple approach to test nano TiO2 photo-activity
in Journal of photochemistry and photobiology. A, Chemistry (Print)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Ortelli, Simona; Blosi, Magda; Delpivo, Camilla; Gardini, Davide; Dondi, Michele; Gualandi, Isacco; Tonelli, Domenica; Aina, Valentina O.; Fenoglio, Ivana; Gandhi, Abbasi A.; Tofail, Syed A M; Costa, Anna Luisa (literal)

Pagina inizio

26 (literal)

Pagina fine

33 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

http://www.scopus.com/record/display.url?eid=2-s2.0-84905645004&origin=inward (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

292 (literal)

Rivista

Journal of photochemistry and photobiology. A, Chemistry (Rivista)

Note

Scopu (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

Istituto Di Scienza E Tecnologia Dei Materiali Ceramici, Faenza; Alma Mater Studiorum Universita di Bologna; Universita degli Studi di Torino; University of Limerick (literal)

Titolo

Multiple approach to test nano TiO2 photo-activity (literal)

Abstract

One of the most important applications of nanostructured TiO2 is the manufacture of self-cleaning textiles. It is believed that the self-cleaning properties originate from the photocatalysis of water by nanostruc-tured TiO2, but the mechanisms acting on textiles, and particularly the phenomena occurring at theinterface, are not fully understood yet. A comparative study is proposed here to investigate the photo-catalytic activity and the efficiency of modified TiO2 nanomaterials with the purpose to identify the mostsuitable analytical method to probe photocatalysis in self-cleaning textiles. The present study sets upreliable, robust, fast and low-cost tests and compares them using TiO2/SiO2 nanocomposite systems withdifferent SiO2 contents. The photocatalytic activity and efficiency of these nanocomposites were bench-marked by three different experimental protocols: a recently developed electrochemical technique todetermine hydroxyl radicals (oOH) and two well-known methods, namely trapping ofoOH radicals bysalicylic acid and degradation of Rhodamine B dye due to photocatalytic actions. The results suggest thatthe photoactivity of TiO2 incorporated in textiles is mainly related to a direct reactivity of the surfaceoxidizing carriers toward the organic target molecule. The salicylic acid and Rhodamine B test providemutually consistent results drawing similar trends of the photocatalytic performance. The electrochemi-cal method turns to be a valid alternative when photocatalytic reactivity is driven by oOH radicals diffusedin a liquid medium. For self-cleaning textile applications, the salicylic acid test provides a more reliablequantitative prediction of the photocatalytic activity, while the Rhodamine B test represents a robustqualitative indicator. (literal)

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