Preparation and characterization of nanostructured MWCNT-TiO2 composite materials for photocatalytic water treatment applications

• Tipo: Artigo em Revista Científica Internacional
• Data: 2008

Autores

Wendong D Wang (Autor) Outra; Philippe Serp (Autor) Outra; Philippe Kalck (Autor) Outra; Joaquim Luis Faria (Autor) FEUP

Revista

Título: Materials Research Bulletin

Vol. 43

Páginas: 958-967

ISSN: 0025-5408

Editora: Elsevier

Indexação

ISI Web of Knowledge - 133 Citações

Scopus - 155 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia dos materiais

Outras Informações

ID Authenticus: P-004-0N2

DOI: 10.1016/j.materresbull.2007.04.032

Abstract (EN): Nanoscale composite materials containing multi-walled carbon nanotubes (MWCNT) and titania were prepared by using a modified sol-gel method. The composites were comprehensively characterized by thermogravimetric analysis, nitrogen adsorption-desorption isotherm, powder X-ray diffraction, scanning electron microscopy with energy dispersive X-ray analysis, transmission electron microscopy, X-ray photoelectron spectroscopy and UV-vis absorption spectroscopy. The analysis revealed the presence of titania crystallites of about 7.5 nm aggregated together with MWCNT in particles of 15-20 nm of diameter. The photoactivity of the prepared materials, under UV or visible irradiation, was tested using the conversion of phenol from model aqueous solutions as probe reaction. A synergy effect on the photocatalytic activities observed for the composite catalysts was discussed in terms of a strong interphase interaction between carbon and TiO2 phases by comparing the different roles of MWCNT in the composite materials.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10