Photocatalytic performance of N-doped TiO(2)nano-SiO2-HY nanocomposites immobilized over cotton fabrics

• Tipo: Artigo em Revista Científica Internacional
• Data: 2019

Autores

Salmon Landi Jr. (Autor) Outra; Joaquim Carneiro (Autor) Outra; Olívia S. G. P. Soares (Autor) FEUP; Manuel Fernando R. Pereira (Autor) FEUP; Andreia C. Gomes (Autor) Outra; Artur Ribeiro (Autor) Outra; António M. Fonseca (Autor) Outra; Píer Parpot (Autor) Outra; Isabel C. Neves (Autor) Outra

Revista

Título: JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T

Vol. 8 Nº 2

Páginas: 1933-1943

ISSN: 2238-7854

Indexação

ISI Web of Knowledge - 0 Citações

Scopus - 14 Citações

INSPEC

Outras Informações

ID Authenticus: P-00Q-D4H

DOI: 10.1016/j.jmrt.2018.06.025

Abstract (EN): This work reports the synthesis of nanocomposite photocatalytic materials based on nitrogen-doped TiO2 nano, SiO2 and different percentages of HY zeolite (0, 12, 25 and 50%). These materials were characterized by using Fourier transformed infrared spectroscopy, X-ray diffraction, N-2 adsorption-desorption, UV-vis diffuse reflectance spectroscopy and scanning electron microscopy. The nanocomposites, which presented an energy band gap of about 3.03 eV, were immobilized on cotton fabric and their self-cleaning properties were investigated by decolourization of rhodamine B (RhB) dye in aqueous solution under simulated solar irradiation. The fabrics coated with the photocatalysts, containing and not containing zeolites, showed the same RhB decolourization (about 95%) after 5 h, excluding the situation where a large amount of HY (50%) was used in the nanocomposites. However, results obtained from high performance liquid chromatography analysis depicted that in the presence of the HY zeolite a more effective RhB degradation was achieved. In fact, even after the use of five consecutive cycles, the RhB decolourization remained high (about 85%). Generally, the photodegradation of RhB solution in the presence of cotton fabrics functionalized with TiO2 nano, TiO2 nano-SiO2 and TiO2 nano-SiO2-0.25 HY resulted in the formation of products that exhibited a similar cytotoxic effect when compared to the untreated RhB solution and subjected to the same tested concentrations and incubation times. Published by Elsevier Editora Ltda. on behalf of Brazilian Metallurgical, Materials and Mining Association.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 11