Au/Ga2O3 photocatalysts for methane conversion coupling with hydrogen evolution from water
Carregando...
Data
Data de publicação:
2022
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
É parte de
BRAZIL MRS MEETING, 20th
Exportar
Resumo
Methane is a major constituent of natural gases and is an important source of carbon and
hydrogen for the chemical industry. However, methane is one of the most stable molecule
and high reaction temperatures are required to transform methane into more valuable and
useful chemicals [1]. The use of solar energy and a photocatalyst would be an ideal method
to convert methane in milder conditions.[1] Recently, it was reported the direct combination
of hydrogen evolution from water and the methane conversion in a photocatalytic system
over Pt/TiO2.[2] In this study, we investigated the use of β-Ga2O3loaded with different
amounts of Au nanoparticles (0.1–1.0%) as photocatalysts that were prepared by
impregnation of HAuCl4 solution onto a commercial β-Ga2O3 and reduction at 200 °C under
hydrogen flow. The photocatalysts were characterized by X-ray diffraction (XRD), UV-Vis
spectroscopy, Transmission Electron Microscopy (TEM), and Raman Spectroscopy. The
photocatalytic reactions were performed on a commercial Ace photocatalytic reactor
equipped with a mercury lamp (450W, UV/A/B/C). A steady stream of methane gas was
bubbled into water containing the photocatalyst in suspension and the products were
identified by GC-MS and quantified by GC-FID/TCD using calibration curves. The principal
products formed were C2H6, CO2, and H2 with minor quantities of C2H4, C3H8, C4H10, and CO.
The best performance was observed for the photocatalyst prepared with 0.1% of Au that
produced 129 μmol.gcat
-1h-1of C2H6 and 10,062 μmol.gcat
-1h-1of H2.
Como referenciar
JANUARIO, ELIANE R.; VAZ, JORGE M.; SPINACE, ESTEVAM V. Au/Ga2O3 photocatalysts for methane conversion coupling with hydrogen evolution from water. In: BRAZIL MRS MEETING, 20th, September 25-29, 2022, Foz do Iguaçu, PR. Abstract... São Carlos, SP: Aptor Software, 2022. Disponível em: http://repositorio.ipen.br/handle/123456789/33558. Acesso em: 13 May 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.