期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 230, 期 -, 页码 343-349出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2015.07.026
关键词
Zinc oxide; Nanoparticles; Microwave hydrothermal; Electrochemical sensor; Photoluminescence
资金
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (Capes)
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Fundacao de Amparo a Pesquisa do Estado de Minas Gerais (FAPEMIG) [APQ-00988-13]
- Rede Mineira de Quimica (RQ-MG) (FAPEMIG Project) [CEX - RED-00010-14]
- Brazilian Nanotechnology National Laboratory, LNNano, Campinas, SP, Brazil [XPS-18304]
We report for the first time a rapid preparation of Zn1-2xCoxNixO nanoparticles via a versatile and environmentally friendly route, microwave-assisted hydrothermal (MAH) method. The Co, Ni co-doped ZnO nanoparticles present an effect on photoluminescence and electrochemical properties, exhibiting excellent electrocatalytic performance compared to undoped ZnO sample. Photoluminescence spectroscopy measurements indicated the reduction of the green-orange-red visible emission region after adding Co and Ni ions, revealing the formation of alternative pathways for the generated recombination. The presence of these metallic ions into ZnO creates different defects, contributing to a local structural disorder, as revealed by Raman spectra. Electrochemical experiments revealed that the electrocatalytic oxidation of dopamine on ZnO attached to multi-walled carbon nanotubes improved significantly in the Co, Ni co-doped ZnO samples when compared to pure ZnO. (C) 2015 Elsevier Inc. All rights reserved.
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