Details

Autor(en) / Beteiligte

• Rahman, I. B. Abdul
• Ayob, M. T. M.
• Ishak, I. S.
• Mohd Lawi, R. L.
• Isahak, W. N. R. W.
• Hamid, M. H. N. Abd
• Othman, N. K.
• Radiman, S.
• School of Chemistry and Food Technology, Faculty of Science and Technology
• School of Applied Physics, Faculty of Science and Technology

Titel

Characteristics of ZnO nanostructures produced with [DMIm]BF{sub 4} using ultrasonic radiation

Ist Teil von

• AIP conference proceedings, 2012-11, Vol.1502 (1)

Ort / Verlag

United States

Erscheinungsjahr

2012

Beschreibungen/Notizen

• Great interests in metallic oxides have emerged because of the promising properties of these materials for various applications such as solar cells and sensors. ZnO nanostructures with different morphologies were successfully synthesized from Zn(CH{sub 3}COO){sub 2} Bullet 2H{sub 2}O, NaOH and room temperature ionic liquid (RTIL) 1-decyl-3-methylimidazolium tetrafluoroborate, [DMIm][BF{sub 4}] with ultrasound irradiation. Parameters such as the effect of sonication time (30, 60 and 90 minutes) and Zn(Ac){sub 2} precursor to [DMIm][BF{sub 4}] ratios of 3:5, 5:5 and 5:3 were investigated. X-ray diffraction patterns revealed that the ZnO nanocrystals were hexagonal zincite crystalline in structure. The band gap energies (E{sub g}) were estimated to be 3.35-3.55 eV from the UV-Visible spectrum. The solution with the highest ratio of Zn was analysed with photoluminescence spectroscopy, which exhibited peaks at 362, 403, 468 and 539 nm, at room temperature. The micrographs of field emission scanning electron microscopy and transmission electron microscopy showed that the synthesis products were spherical (30-60 nm), spindle ({approx}10 Multiplication-Sign 70 nm for width Multiplication-Sign length) and whisker-like (100-200 nm), with their dimensions decreasing systematically with increased sonication time. Chemical compositions were approximated at 1:1 for Zn and O, estimated by electron dispersive x-ray spectrum.