Título: Applied Surface ScienceImportada do Authenticus Pesquisar Publicações da Revista

Vol. 387

Páginas: 183-189

ISSN: 0169-4332

Editora: Elsevier

ISI Web of Knowledge - 21 Citações

ISI Web of Science

Scopus - 47 Citações

INSPEC

CORDIS: Ciências Tecnológicas

ID Authenticus: P-00M-4QH

DOI: 10.1016/j.apsusc.2016.06.101

Resumo (PT):

Abstract (EN): The photocatalytic activity of a commercial titanium dioxide (P25) and of an in-house prepared P25/graphene composite is assessed according to standard ISO 22197-1:2007. The photoactivity performances of bare and composite TiO2-based materials were further studied by electrochemical impedance spectroscopy (EIS) technique to better understand the function of the graphene in the composite. EIS experiments were performed using a three-electrode configuration, which allows obtaining more detailed information about the complex charge transfer phenomena at the semiconductor/electrolyte interface. The Randles equivalent circuit was selected as the most suitable for modelling the present photocatalysts. The use of the graphene composite allows a more effective charge separation with lower charge transfer resistance and less e−/h+ recombination on the composite photocatalyst, reflected in the higher values of NO conversion.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7