Unveiling the role of peroxo groups in Nb2O5 photocatalytic efficiency under visible light

Full text
Author(s):	Silva, Roberta R. M. ^[1] ; Oliveira, Jessica A. ^{[2, 1]} ; Ruotolo, Luis A. M. ^[1] ; Faria, Ana L. A. ^[1] ; Ribeiro, Caue ^[2] ; Nogueira, Francisco G. E. ^[1] Total Authors: 6
Affiliation:	^[1] Univ Fed Sao Carlos, Grad Program Chem Engn, Rod Washington Luiz Km 235, BR-13565905 Sao Paulo, SP - Brazil ^[2] Embrapa Instrumentat, Rua XV Novembro 1452, BR-13560970 Sao Carlos, SP - Brazil Total Affiliations: 2
Document type:	Journal article
Source:	Materials Letters; v. 273, AUG 15 2020.
Web of Science Citations:	0
Abstract
Peroxo-Nb2O5 photocatalyst with visible-light activity was fabricated via a one-pot hydrothermal oxygen peroxide method for the first time. The one-pot synthesis employing different H2O2 concentrations promoted simultaneous crystallization and surface groups formation that impacted the photocatalytic efficiency. It was demonstrated that the presence of peroxo groups acted as charge mediators in a photooxidative process since the samples did not present any band gap shift to visible. The catalyst reutilization indicated that the photocatalytic effect is not temporary, reinforcing the chemical role of peroxo groups as charge mediators. (C) 2020 Elsevier B.V. All rights reserved. (AU)

FAPESP's process:	18/09723-9 - CO2 PHOTOCONVERSION IN PRODUCTS WITH VALUE-ADDED: EXPERIMENTAL AND THEORIC STUDIES
Grantee:	Francisco Guilherme Esteves Nogueira
Support Opportunities:	Regular Research Grants