期刊
INORGANIC CHEMISTRY
卷 58, 期 4, 页码 2491-2500出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.8b03056
关键词
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资金
- National Natural Science Foundation of China [91622105]
- Jiangxi Provincial Department of Science and Technology [20161BAB203083, 20172BCB22008]
- Jiangxi Provincial Education Department [GJJ160327]
- Scientific Research Foundation of Graduate School of Jiangxi Normal University [JYS2016005]
In this paper, scandium molybdate microstructures have been prepared from solution via a microwave heating method. By controlling the experimental parameters such as molar ratio of reagent and reaction time, scandium molybdates with tunable phase and diverse morphologies including snowflakes, microflowers, microsheets, and branched spindles were obtained. The density of states and surface energies of Sc2Mo3O12 were primarily studied from first-principles calculations. An indirect band gap of 3.56 eV was observed for crystalline Sc2Mo3O12, and the surface energies of various facets were determined to be 0.27-0.91 J/m(2). The influence of n(Sc3+):n(Mo7O246-) (short for Sc/Mo) molar ratio was systematically investigated and well-characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and UV-vis absorption spectroscopy (UV-vis). Results indicate that the Sc/Mo molar ratio has a great effect on the phase and morphology. Diffuse reflection spectra (DRS) revealed the E-gap can be readily tuned from 3.69 to 4.16 eV, which is in accordance with the theoretical result. The photoluminescence (PL) properties of Eu3+-doped Sc2Mo3O12 were discussed. This facile synthesis strategy could be extended to the synthesis of other molybdates.
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