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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.)

Synthesis of ZnO Nanoparticles Assisted by N Sources and their Application in the Photodegradation of Organic Contaminants

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Author(s):
da Silva, Gelson T. S. T. [1, 2] ; Carvalho, Kele T. G. [1] ; Lopes, Osmando F. [1, 2] ; Gomes, Eliziana S. [3] ; Malagutti, Andrea R. [3] ; Mastelaro, Valmor R. [4] ; Ribeiro, Caue [1] ; Mourao, Henrique A. J. L. [5]
Total Authors: 8
Affiliation:
[1] Lab Nacl Nanotecnol Agronegocio LNNA Embrapa Inst, Rua 15 Novembro 1452, BR-13561206 Sao Carlos, SP - Brazil
[2] Univ Fed Sao Carlos, Dept Quim, Rodovia Washington Luiz, Km 235, BR-13565905 Sao Carlos, SP - Brazil
[3] Univ Fed Vales Jequitinhonha & Mucuri, Dept Farm, Rodovia MGT 367, Km 583, BR-39100000 Diamantina, MG - Brazil
[4] Univ Sao Paulo, Inst Fis Sao Carlos, Ave Trabalhador Sao Carlense 400, BR-13566590 Sao Carlos, SP - Brazil
[5] Univ Fed Vales Jequitinhonha & Mucuri, Inst Ciencia & Tecnol, Rodovia MGT 367, Km 583, BR-39100000 Diamantina, MG - Brazil
Total Affiliations: 5
Document type: Journal article
Source: CHEMCATCHEM; v. 9, n. 19, p. 3795-3804, OCT 10 2017.
Web of Science Citations: 11
Abstract

A modified polymeric precursor method assisted by N sources (urea or melamine) was used to obtain anion-doped ZnO nanoparticles. The influence of these molecules on the physical-chemical and photocatalytic properties of the as-synthesized samples was investigated. The ZnO nanoparticles exhibited a hexagonal wurtzite phase and crystallite sizes of approximately 20 nm. The addition of urea or melamine to the Zn2+ precursor solution improved the surface properties of the materials and resulted in controlled growth of the N-doped ZnO nanoparticles, with urea showing superior performance for this purpose. These changes led to improved photocatalytic performance in the degradation of methylene blue (MB) dye and ethionamide antibiotic under UVC irradiation. It was observed that the indirect mechanism involving (OH)-O-center dot radical attack played the main role in both photodegradation reactions catalyzed by the as-synthesized ZnO samples, whereas the photosensitization mechanism had a negligible influence. The use of ESI-MS analyses showed that the MB dye molecules were broken up by the action of the ZnO photocatalyst, indicating the occurrence of a mineralization process. (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