Effect of Er3+ ions on the phase formation and properties of In(2)O(3)nanostructures crystallized upon microwave heating

Effect of Er3+ ions on the phase formation and properties of In(2)O(3)nanostructures crystallized upon microwave heating

Author Lemos, Samantha C. S. Google Scholar
Romeiro, Fernanda C. Google Scholar
de Paula, Leonardo F. Google Scholar
Goncalves, Rosana F. Autor UNIFESP Google Scholar
de Moura, Ana P. Google Scholar
Ferrer, Mateus M. Google Scholar
Longo, Elson Google Scholar
Patrocinio, Antonio Otavio T. Google Scholar
Lima, Renata C. Google Scholar
Abstract Regular sized nanostructures of indium oxide (In2O3) were homogeneously grown using a facile route, i.e. a microwave-hydrothermal method combined with rapid thermal treatment in a microwave oven. The presence of Er3+ doping plays an important role in controlling the formation of cubic (bcc) and rhombohedral (rh) In2O3 phases. The samples presented broad photoluminescent emission bands in the green-orange region, which were attributed to the recombination of electrons at oxygen vacancies. The photocatalytic activities of pure bcc-In2O3 and a bcc-rh-In2O3 mixture towards the UVA degradation of methylene blue (MB) were also evaluated. The results showed that Er+3 doped In2O3 exhibited the highest photocatalytic activity with a photonic efficiency three times higher than the pure oxide. The improved performance was attributed to the higher surface area, the greater concentration of electron traps due the presence of the dopant and the possible formation of heterojunctions between the cubic and rhombohedral phases.
Keywords Indium oxide
Earth rare
Microwave hydrothermal
Photoluminescence
Photocatalyst
xmlui.dri2xhtml.METS-1.0.item-coverage San Diego
Language English
Sponsor 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)
FAPEMIG
Grant number FAPEMIG: APQ-00988-13
FAPEMIG: APQ-00330-14
FAPEMIG: CEX - RED-00010-14
Date 2017
Published in Journal Of Solid State Chemistry. San Diego, v. 249, p. 58-63, 2017.
ISSN 0022-4596 (Sherpa/Romeo, impact factor)
Publisher Academic Press Inc Elsevier Science
Extent 58-63
Origin http://dx.doi.org/10.1016/j.jssc.2017.02.011
Access rights Closed access
Type Article
Web of Science ID WOS:000398879700010
URI https://repositorio.unifesp.br/handle/11600/54695

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