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Indium doping induced defect structure evolution and photocatalytic activity of hydrothermally grown small SnO<sub>2</sub> nanoparticles
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논문 기본 정보

Type
Academic journal
Author
Zeferino, Raul Sanchez (Departamento de Fisica, Universidad de Sonora) Pal, Umapada (Instituto de Fisica, Universidad Autonoma de Puebla) Reues, Ma Eunice De Anda (Instituto de Fisica, Universidad Autonoma de Puebla) Rosas, Efrain Rubio (Centro Universitario de Vinculacion y Transferencia de Tecnologia, Benemerita Universidad Autonoma de Puebla)
Journal
테크노프레스 Advances in nano research Advances in nano research 제7권 제1호 SCOPUS
Published
2019.1
Pages
13 - 24 (12page)

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Indium doping induced defect structure evolution and photocatalytic activity of hydrothermally grown small SnO<sub>2</sub> nanoparticles
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Well-crystalline $SnO_2$ nanoparticles of 4-5 nm size with different In contents were synthesized by hydrothermal process at relatively low temperature and characterized by transmission electron microscopy (TEM), microRaman spectroscopy and photoluminescence (PL) spectroscopy. Indium incorporation in $SnO_2$ lattice is seen to cause a lattice expansion, increasing the average size of the nanoparticles. The fundamental phonon vibration modes of $SnO_2$ lattice suffer a broadening, and surface modes associated to particle size shift gradually with the increase of In content. Incorporation of In drastically enhances the PL emission of $SnO_2$ nanoparticles associated to deep electronic defect levels. Although In incorporation reduces the band gap energy of $SnO_2$ crystallites only marginally, it affects drastically their dye degradation behaviors under UV illumination. While the UV degradation of methylene blue (MB) by undoped $SnO_2$ nanoparticles occurs through the production of intermediate byproducts such as azure A, azure B, and azure C, direct mineralization of MB takes place for In-doped $SnO_2$ nanoparticles.
#tin oxide nanoparticle #indium doping #defect structure #photocatalysis

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