Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/47290
Título: | Photocatalytic 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-chave: | Photocatalysis Textile functionalization TiO2-SiO2 HY zeolite Composites Rhodamine B TiO -SiO 2 2 |
Data: | 2-Jun-2017 |
Editora: | Elsevier 1 |
Revista: | Journal 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. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/47290 |
DOI: | 10.1016/j.jphotochem.2017.05.047 |
ISSN: | 1010-6030 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series CDF - GRF - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
Photocatalytic degradation of Rhodamine B dye by cotton textile coated with SiO2-TiO2 and SiO2-TiO2-HY composites.pdf | 2,83 MB | Adobe PDF | Ver/Abrir |