Autor(es)

Geovo, Jose D. C. ; Torres, Juliana A. ; Giroto, Amanda S. ; Santos, Fabiana L. ; Souza, Joelma R. C. ; Ribeiro, Lucas S. ; Nogueira, Andre E.

• Tipo de documento: Artigo Científico
• Fonte: Materials Letters; v. 356, p. 5-pg., 2023-11-28.

Resumo

Composites were synthesized using two distinct methods: salt impregnation and coprecipitation, and characterized using various techniques. Both methods yielded composites with high surface area and band gap energy in the visible electromagnetic spectrum. Pure MCM-41 and MCM-41/CuO composites exhibited potential for CO2 photoreduction, where the composition and different active sites of the photocatalysts played a critical role in the activity and selectivity of the products formed. Composites containing 1% of the CuO obtained by both methods showed higher ethylene production compared to MCM-41, but the materials obtained by the impregnation method demonstrated lower photocatalytic activity than MCM-41 and the composites obtained by the coprecipitation method. These results highlight the versatility of MCM-41 in forming composites with semiconductors and the importance of understanding the key factors that influence CO2 photoreduction and composite selectivity, including their surface, structural, and electrical characteristics. (AU)

• Processo FAPESP: 18/01258-5 - Novos processos catalíticos e fotocatalíticos para a conversão direta de metano e CO2 em produtos
• Beneficiário: José Maria Correa Bueno
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 18/12871-0 - Modificação do perfil da temperatura de transição de nanocompósitos termossensíveis
• Beneficiário: Lucas da Silva Ribeiro
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 18/10104-1 - Preparação de Nanocompósitos a partir de Ureia modificada com Glicerol para otimização do Processo de Liberação Controlada de Nutrientes
• Beneficiário: Amanda Soares Giroto
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado