Synthesis and characterization of ZnO nanostructures obtained in mixtures of ionic liquids with organic solvents

被引：15
|
作者：
Oprea, Ovidiu [1 ]
Ciocirlan, Oana [1 ]
Badanoiu, Alina [2 ]
Vasile, Eugeniu [3 ]
机构：
[1] Univ Politehn Bucuresti, Dept Inorgan Chem Phys Chem & Electrochem, Bucharest 011061, Romania
[2] Univ Politehn Bucuresti, SIMONa Dept, Bucharest 011061, Romania
[3] METAV CD, Bucharest 020015, Romania
来源：
CENTRAL EUROPEAN JOURNAL OF CHEMISTRY | 2014年 / 12卷 / 07期
关键词：
Zinc oxide; Ionic liquids; Ethylene glycol; Dimethyl sulfoxide; PHOTOCATALYTIC ACTIVITY; FLOWER-LIKE; NANOPARTICLES; PHOTOLUMINESCENCE; MORPHOLOGY; MECHANISM; GROWTH; ROUTE; SIZE;
D O I：
10.2478/s11532-014-0507-5
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
ZnO nanoparticles were synthesized in mixtures of ionic liquids based on imidazolium cation with organic solvents (dimethyl sulfoxide and ethylene glycol) by a simple, one-step solution route at low temperature. The effect of these mixtures on the morphology, size and properties of as obtained ZnO nanopowders was investigated. The obtained nanopowders have been characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), UV-Vis absorption spectroscopy (UV-Vis) and photoluminescence (PL). The effect of the ionic liquid mixture on the photocatalytic degradation of methylene blue has been analysed. The XRD studies confirmed the hexagonal wurtzite structure of the obtained ZnO powder. The UV-Vis absorption spectra present the typical shape for ZnO, with a broad band situated in the UV region, with the maximum around 360 nm. The calculated band-gap energy is in interval 3.25-3.28 eV. The synthesized ZnO nanopowders have high photocatalytic activity against methylene blue, the best results being obtained when 1-ethyl-3-methylimidazolium tetrafluoroborate was used as the solvent.
引用
收藏
页码：749 / 756
页数：8
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