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Type: Artigo
Title: Synthesis and characterization of a quaternary nanocomposite based on Tio2/cds/rgo/pt and its application in the photoreduction of Co2 to methane under visible light
Author: Benedetti, J. E.
Bernardo, D. R.
Morais, A.
Bettini, Jefferson
Nogueira, A. F.
Abstract: Together we are stronger' In this work, the preparation of the quaternary nanocomposite TiO2/CdS/rGO/Pt is reported along with its application, for the first time, as a catalyst for the photocatalytic reduction of carbon dioxide (CO2) to methane (CH4). TiO2/CdS nanoparticles and Pt nanoparticle-decorated reduced graphene oxide sheets (rGO/Pt) were synthesized separately and characterized through X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), Raman spectroscopy, UV-vis spectroscopy and photoelectrochemical experiments. Hydrocarbon samples were collected and analysed using gas chromatography (GC). After 5 hours of illumination under visible light, 0.11 mmol of CH4 was produced at an average production rate of 0.0867 mmol h(-1), which is higher than the production of CH4 measured from the TiO2/CdS and the TiO2/CdS/Pt control samples. The photoelectrochemical experiments confirmed that the presence of rGO sheets in the nanocomposite enhanced the electrochemical and photocatalytic properties of the nanocomposite as a result of rapid electron transport and the inhibition of charge recombination
Subject: Atividade fotocatalítica
Dióxido de carbono
Country: Estados Unidos
Editor: Royal Society of Chemistry
Rights: Aberto
Identifier DOI: 10.1039/c4ra15605f
Date Issue: 2015
Appears in Collections:IQ - Artigos e Outros Documentos
IFGW - Artigos e Outros Documentos

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