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

• Authors: Ovidiu Oprea , Oana Ciocirlan , Alina Badanoiu , Eugeniu Vasile
• Languages of publication: EN

Abstracts

EN

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.

Keywords

EN

Zinc oxide; Ionic liquids; Ethylene glycol; Dimethyl sulfoxide

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2014
• Volume: 12
• Issue: 7
• Pages: 749-756

Dates

published

1 - 7 - 2014

online

30 - 4 - 2014

Contributors

author

Ovidiu Oprea

• Politehnica University of Bucharest

author

Oana Ciocirlan

• Politehnica University of Bucharest

author

Alina Badanoiu

• University Politehnica Bucharest

author

Eugeniu Vasile

• METAV-CD

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Identifiers

DOI

10.2478/s11532-014-0507-5