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Synthesis and morphology control of ZnO nanostructures in microemulsions

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Abstract.
ZnO nanostructures with different morphologies and optical properties were prepared by a simple
microemulsion process, and PEG400 was used as a directing agent. The samples were characterized by
TEM, XRD, FTIR, and TG-DTA analysis. The XRD spectra indicate that the ZnO crystal has a hexagonal
wurtzite structure. Needle-like, columnar, and spherical ZnO samples were synthesized respectively
with the increase of PEG400 concentration in Zn(NO3)2 solution. TEM images and thermogravimetric
analysis reveal that the microemulsion interface and the PEG400 agent have a synergistic effect on the
morphology and crystalline size transition of ZnO nanostructures. The optical properties of the samples
were investigated by measuring the UV–Vis absorbance spectra at room temperature. All the samples
exhibit strong UV absorption at around 365 nm. ZnO products with band gap energies at 3.06, 3.02, 2.95,
and 2.85 eV were obtained with 0, 12.5, 25.0, and 50.0% of PEG400 in Zn(NO3)2 solution, respectively. The
formation mechanism of the ZnO nanostructures was proposed and discussed in detail. The synergistic
control of the microemulsion interface and the agent on the growth of crystal nuclei reported here
provides an alternative approach for preparation of other well-defined nanostructures.

Keywords:
ZnO nanostructures
Microemulsion
Hydrothermal
PEG molecules

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Ketersediaan

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Informasi Detail

Judul Seri

Journal of Colloid and Interface Science

No. Panggil

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Penerbit

London : Elsevier Inc.., 2009

Deskripsi Fisik

Journal of Colloid and Interface Science 333 (2009) 465–473

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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