Please use this identifier to cite or link to this item:
https://hdl.handle.net/10216/103564
Author(s): | Joana Ângelo Pedro Magalhães Luísa Andrade Adélio Mendes |
Title: | Characterization of TiO based semiconductors for photocatalysis by electrochemical impedance spectroscopy |
Issue Date: | 2016 |
Abstract: | 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. |
Subject: | Ciências Tecnológicas Technological sciences |
URI: | https://hdl.handle.net/10216/103564 |
Related Information: | info:eu-repo/grantAgreement/COMISSÃO EUROPEIA/7.º Programa-Quadro de IDT/321315/Building Integrated Dye Sensitized Solar Cells/BI-DSC info:eu-repo/grantAgreement/FCT - Fundação para a Ciência e a Tecnologia/Projetos Estratégicos/UID/EQU/00511/2013 - POCI-01-0145-FEDER-006939/Laboratório de Engenharia de Processos, Ambiente, Biotecnologia e Energia/LEPABE |
Document Type: | Artigo em Revista Científica Internacional |
Rights: | restrictedAccess |
Appears in Collections: | FEUP - Artigo em Revista Científica Internacional |
Files in This Item:
File | Description | Size | Format | |
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145501.pdf Restricted Access | Artigo original publicado | 1.67 MB | Adobe PDF | Request a copy from the Author(s) |
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