Autor(es)

Torres, Juliana Arriel ; Da Silva, Gelson T. S. T. ; Barbosa de Freitas Silva, Fernando ; Ribeiro, Caue

• Tipo de documento: Artigo Científico
• Fonte: ChemPhysChem; v. 21, n. 21, p. 5-pg., 2020-10-23.

Resumo

Tin dioxide (SnO2) has intrinsic characteristics that do not favor its photocatalytic activity. However, we evidenced that surface modification can positively influence its performance for CO(2)photoreduction in the gas phase. The hydroxylation of the SnO(2)surface played a role in the CO(2)affinity decreasing its reduction potential. The results showed that a certain selectivity for methane (CH4), carbon monoxide (CO), and ethylene (C2H4) is related to different SnO(2)hydrothermal annealing. The best performance was seen for SnO(2)annealed at 150 degrees C, with a production of 20.4 mu mol g(-1)for CH(4)and 16.45 mu mol g(-1)for CO, while for SnO(2)at 200 degrees C the system produced more C2H4, probably due to a decrease of surface -OH groups. (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: 16/21515-7 - Desenvolvimento de heteroestruturas de óxido de magnésio com ZnO e TiO2 para aplicação em processos de fotossíntese artificial
• Beneficiário: Juliana Arriel Torres
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado