Utilize este identificador para referenciar este registo: https://hdl.handle.net/1822/47290

TítuloPhotocatalytic degradation of Rhodamine B dye by cotton textile coated with SiO2-TiO2 and SiO2-TiO2-HY composites
Autor(es)Landi Júnior, Salmon
Carneiro, Joaquim A. O.
Ferdov, S.
Fonseca, A. M.
Neves, Isabel C.
Ferreira, Marta
Parpot, Pier
Soares, Olivia S. G. P.
Pereira, Manuel F. R.
Palavras-chavePhotocatalysis
Textile functionalization
TiO2-SiO2
HY zeolite
Composites
Rhodamine B
TiO -SiO 2 2
Data2-Jun-2017
EditoraElsevier
RevistaJournal of Photochemistry and Photobiology A: Chemistry
Resumo(s)This work is devoted to study the photocatalytic ability of cotton textiles functionalized with SiO2-TiO2 and SiO2-TiO2-HY composites to degrade a dye molecule. Coatings were prepared by sol-gel method and calcined at different temperatures in a range of 400–750 °C. FTIR confirmed the existence of SiOTi bounds and the band located in the region between 570 and 600 cm−1 was used to calculate the framework Si/Al ratio of HY in the SiO2-TiO2-HY composites. XRD confirmed the presence of nanosized TiO2 (anatase phase) in all calcined composites. Nitrogen adsorption isotherms showed a decrease in surface area and pore volume for higher calcination temperature. A simple mechanical process was used to impregnate the different composites on the cotton substrates. The photocatalytic activity of cotton textiles functionalized with SiO2-TiO2 and SiO2-TiO2-HY composites was tested via the degradation of Rhodamine B (RhB) dye under similar solar irradiation. The best catalytic performance was achieved with the SiO2-TiO2 and SiO2-TiO2-HY composites subjected to a calcination treatment at 400 °C, whereas SiO2-TiO2 presented a decolourization and mineralization around 94% and 89%, respectively, after 2 h of irradiation. Furthermore, the products of RhB degradation were analysed and identified by using HPLC-ESI–MS and ion chromatography techniques and a photocatalytic mechanism was proposed.
TipoArtigo
URIhttps://hdl.handle.net/1822/47290
DOI10.1016/j.jphotochem.2017.05.047
ISSN1010-6030
Arbitragem científicayes
AcessoAcesso aberto
Aparece nas coleções:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series
CDF - GRF - Artigos/Papers (with refereeing)


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