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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

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

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Autor(es):
Benedetti, J. E. [1] ; Bernardo, D. R. [1] ; Morais, A. [1] ; Bettini, Jefferson [2] ; Nogueira, A. F. [1]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Campinas UNICAMP, Chem Inst, BR-13083970 Campinas, SP - Brazil
[2] CNPEM, Natl Ctr Energy & Mat Res, Natl Nanotechnol Lab, BR-13083970 Campinas, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: RSC ADVANCES; v. 5, n. 43, p. 33914-33922, 2015.
Citações Web of Science: 28
Resumo

`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. (AU)

Processo FAPESP: 10/18656-1 - Preparação e caracterização de compósitos de Nanopartículas de TiO2 e ZnO contendo materiais carbonáceos e sua aplicação em células solares
Beneficiário:Andreia de Morais
Linha de fomento: Bolsas no Brasil - Doutorado