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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.)

Role of defects on the enhancement of the photocatalytic response of ZnO nanostructures

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Author(s):
Montero-Munoz, Marly [1] ; Ramos-Ibarra, J. E. [1] ; Rodriguez-Paez, Jorge E. [2] ; Teodoro, Marcio D. [3] ; Marques, Gilmar E. [3] ; Sanabria, Alfonso R. [4] ; Cajas, Paola C. [5] ; Paez, Carlos A. [6] ; Heinrichs, Benoit [6] ; Coaquira, Jose A. H. [1]
Total Authors: 10
Affiliation:
[1] Univ Brasilia, Inst Phys, BR-70910900 Brasilia, DF - Brazil
[2] Univ Cauca, Dept Phys, Popayan, Cauca - Colombia
[3] Univ Fed Sao Carlos, Dept Phys, BR-13565905 Sao Carlos, SP - Brazil
[4] Univ Cauca, Dept Chem, Popayan, Cauca - Colombia
[5] Univ Brasilia, Dept Mech Engn, BR-70910900 Brasilia, DF - Brazil
[6] Univ Liege, Dept Chem Engn, Genie Chim Nanomat & Interfaces, Liege - Belgium
Total Affiliations: 6
Document type: Journal article
Source: Applied Surface Science; v. 448, p. 646-654, AUG 1 2018.
Web of Science Citations: 11
Abstract

Zinc oxide (ZnO) nanostructures have been synthesized by a simple controlled precipitation method to study the effects of the type solvent - including water, acetic acid and ethylene glycol - on the formation of ZnO and on its photocatalytic activity for the decomposition of H2O2 in aqueous solution. Scanning electron microscopy (SEM) and synchrotron-based X-ray diffraction (XRD) were used to determine the morphology, crystallinity, and chemical composition of the ZnO structures. Raman spectroscopy and photoluminescence measurements were carried out to determine the nature of the defects present in the different ZnO nanostructures and how they affect the photocatalytic activity. Based on the results, we propose plausible growth mechanisms underlying the formation of ZnO with different morphology, according to the solvent used during the synthesis. A direct relation between the photocatalytic activity and the defects type was established, suggesting that defects play a vital role in modulating the photocatalytic response. (C) 2018 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 13/18719-1 - Electronic carriers dynamics in semiconductor nanostructures
Grantee:Marcio Daldin Teodoro
Support Opportunities: Research Grants - Young Investigators Grants
FAPESP's process: 14/19142-2 - Characterization and processing of semiconductor nanostructures and application as devices
Grantee:Gilmar Eugenio Marques
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 15/13771-0 - Multi-User Equipment approved in grant 14/19142-2: ultra-low vibration cryostat with magnetic field and confocal microscope
Grantee:Gilmar Eugenio Marques
Support Opportunities: Multi-user Equipment Program
FAPESP's process: 14/07375-2 - Multi-user equipment approved in grant 2013/18719-1: time resolved measurement system
Grantee:Marcio Daldin Teodoro
Support Opportunities: Multi-user Equipment Program