Experimental Evidence of CO(2)Photoreduction Activity of SnO(2)Nanoparticles

Author(s)

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

• Document type: Journal article
• Source: ChemPhysChem; v. 21, n. 21, p. 5-pg., 2020-10-23.

Abstract

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)

• FAPESP's process: 18/01258-5 - Novel chemical catalytic and photocatalytic processes for the direct conversion of methane and CO2 to products
• Grantee: José Maria Correa Bueno
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 16/21515-7 - Development of magnesium oxide with zinc and titanium heterostructure for application in artificial photosynthesis processes
• Grantee: Juliana Arriel Torres
• Support Opportunities: Scholarships in Brazil - Post-Doctoral