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Synthesis of Porous Zinc Gallate Prisms Composed of Highly Oriented Nanoparticles by an In Situ Conversion Reaction
Author(s) -
Zhou Wenli,
Yang Xianfeng,
Huang Lin,
Wang Jing,
Tang Jinke,
Liang Hongbin
Publication year - 2012
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201102673
Subject(s) - photoluminescence , materials science , phosphor , nanoparticle , ion , doping , luminescence , zinc , porosity , in situ , nanotechnology , chemical engineering , mineralogy , optoelectronics , chemistry , metallurgy , composite material , organic chemistry , engineering
Porous ZnGa 2 O 4 prisms assembled by highly oriented nanoparticles have been fabricated by an in situ chemical conversion approach. We report, for the first time, that a solid α‐Ga 2 O 3 precursor can be directly converted into ZnGa 2 O 4 rather than through the intermediate GaOOH. Based on a detailed study of the evolution of ZnGa 2 O 4 prisms, a growth mechanism is proposed for the in situ conversion reaction. During this conversion process, the precursor morphology can be highly retained, which is attributed to the similar atomic arrangements of the Ga and O atoms and excellent matching of the lattice spacing between the α‐Ga 2 O 3 and ZnGa 2 O 4 prisms. The direct reaction between the precursor α‐Ga 2 O 3 and Zn 2+ ions is more efficient than that between the byproduct GaOOH and Zn 2+ ions. Moreover, the photoluminescent color of the ZnGa 2 O 4 phosphor can be tuned by doping with Mn 2+ ions. Efficient energy transfer (ET) from the host lattice to the Mn 2+ centers is observed, whereas ET from the defects to the Mn 2+ ions is prohibited. The fabricated ZnGa 2 O 4 products have potential in the field of display applications.