Photocatalytic activity of nanocarbon-tio composites with gold nanoparticles for the degradation of water pollutants

• Tipo: Capítulo ou Parte de Livro
• Data: 2016

Autores

Pastrana-Martínez, L.M. (Autor) FEUP; Sónia Carabineiro (Autor) FEUP; Buijnsters, J (Autor) Outra; Figueiredo, J (Autor) Outra; Faria, J (Autor) Outra; Silva, Adrian (Autor) FEUP

Livro

Título: Smart Materials for Waste Water Applications

Páginas: 87-108

ISBN: 9781119041214; 9781119041184

ISBN Eletrónico: 9781119041184

Indexação

Scopus - 1 Citação

Projetos Associados

LSRE-LCM - Laboratório de Processos de Separação e Reação - Laboratório de Catálise e Materiais

Outras Informações

ID Authenticus: P-00M-5X8

DOI: 10.1002/9781119041214.ch3

Abstract (EN): Gold was loaded on diff erent carbon-TiO2 composites [graphene oxide (GO)- TiO2, carbon nanotubes-TiO2, nanodiamond-TiO2 and fullerenes-TiO2] and on bare TiO2 by a liquid-phase reductive deposition method. Th e obtained materials were characterized by scanning electron microscopy (SEM), physical adsorption of nitrogen, diff use refl ectance UV-vis (DR-UV-vis) and IR (DRIFT) spectroscopies and point of zero charge (pHPZC) measurements. Th e photocatalytic performance was evaluated for the degradation of a pharmaceutical water pollutant, diphenhydramine (DP). Th e best performing photocatalyst was the Au-loaded GO-TiO2 composite that exhibited the highest catalytic ctivity under both near-UV-vis and visible light irradiation, outperforming the synthesized bare TiO2 material. Th e high effi ciency of this composite can be ascribed to the optimal assembly between the TiO2 nanoparticles and GO sheets, permitting the material to act simultaneously as an effi cient electron acceptor and donor, a fact that results in the suppression of charge recombination. © 2016 Scrivener Publishing LLC.

Idioma: Inglês

Tipo (Avaliação Docente): Científica