Synthesis, characterization and catalytic properties of nanocrystaline Y2O3-coated TiO2 in the ethanol dehydration reaction
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Data
2012-04-01
Autores
Fajardo, Humberto Vieira
Longo, Elson [UNESP]
Leite, Edson Roberto
Libanori, Rafael
Probst, Luiz Fernando Dias
Carreño, Neftalí Lenin Villarreal
Título da Revista
ISSN da Revista
Título de Volume
Editor
ABM, ABC, ABPol
Resumo
In the present study, TiO2 nanopowder was partially coated with Y2O3 precursors generated by a sol-gel modified route. The system of nanocoated particles formed an ultra thin structure on the TiO2 surfaces. The modified nanoparticles were characterized by high resolution transmission electron microscopy (HR-TEM), X-ray diffraction (XRD) analysis, Zeta potential and surface area through N2 fisisorption measurements. Bioethanol dehydration was used as a probe reaction to investigate the modifications on the nanoparticles surface. The process led to the obtainment of nanoparticles with important surface characteristics and catalytic behavior in the bioethanol dehydration reaction, with improved activity and particular selectivity in comparison to their non-coated analogs. The ethylene production was disfavored and selectivity toward acetaldehyde, hydrogen and ethane increased over modified nanoparticles.
Descrição
Palavras-chave
catalysis, surface modifications, titania, coating
Como citar
Materials Research. ABM, ABC, ABPol, v. 15, n. 2, p. 285-290, 2012.