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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

g-C3N4/Nb2O5 heterostructures tailored by sonochemical synthesis: Enhanced photocatalytic performance in oxidation of emerging pollutants driven by visible radiation

Full text
Author(s):
da Silva, Gelson T. S. T. ; Carvalho, Kele T. G. ; Lopes, Osmando F. ; Ribeiro, Caue
Total Authors: 4
Document type: Journal article
Source: APPLIED CATALYSIS B-ENVIRONMENTAL; v. 216, p. 70-79, NOV 5 2017.
Web of Science Citations: 24
Abstract

In this study, g-C3N4/Nb2O5 heterostructures were successfully prepared by a sonochemical method based on surface charge -induced heteroaggregation. Under visible irradiation, the heterostructured gC(3)N(4)/Nb2O5 samples exhibited higher activity in the photooxidation of the drug amiloride (AML) and rhodamine B dye (RhB), compared to the pure g-C3N4 and Nb2O5 phases. The enhanced photocatalytic activity of the heterostructures could be attributed to the effective formation of heterojunctions between the g-C3N4 and Nb2O5 semiconductors, causing the migration of photogenerated electrons and holes, hence increasing their lifetimes. Formation of the type -II heterostructure was confirmed by time -resolved photoluminescence, in which the 3CN:1Nb heterostructure showed the longest electron/hole pair lifetime. The 3CN:1Nb and 1CN:3Nb heterostructures exhibited high stability even after four cycles of reuse in RhB dye and drug AML oxidation, respectively. In summary, the combination of g-C3N4 with Nb2O5 to produce a type -II heterostructure is a good strategy to overcome important challenges in photocatalysis. (C) 2017 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 16/09746-3 - Electro-/Photoelectrocatalysis reduction of CO2: efficiency, selectivity and oscillatory kinetics
Grantee:Osmando Ferreira Lopes
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 15/12304-0 - Evaluation of the photocatalytic activity of g-C3N4/Nb2O5 heterojunctions in the abatement of pollutants in gas phase
Grantee:Kele Tatiane Gomes Carvalho
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 13/13888-0 - Synthesis of BiVO4/bismuth oxides nano-heterostructures and evaluation of photocatalytic properties
Grantee:Osmando Ferreira Lopes
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 13/17639-4 - Obtainment of nanostructured semiconductors: correlation of the photocatalytic properties to their structural characteristic
Grantee:Waldir Avansi Junior
Support type: Regular Research Grants