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An efficient approach to derive hydroxyl groups on the surface of barium titanate nanoparticles to improve its chemical modification ability

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Abstract.
Highly hydroxylated barium titanate (BaTiO3) nanoparticles have been prepared via an easy and gentle
approach which oxidizes BaTiO3 nanoparticles using an aqueous solution of hydrogen peroxide (H2O2).
The hydroxylated BaTiO3 surface reacts with sodium oleate (SOA) to form oleophilic layers that greatly
enhance the dispersion of BaTiO3 nanoparticles in organic solvents such as tetrahydrofuran, toluene, and
n-octane. The results of Fourier transform infrared spectroscopy confirmed that the major functional
groups on the surface of H2O2-treated BaTiO3 nanoparticles are hydroxyl groups which are chemically
active, favoring chemical bonding with SOA. The results of transmission electron microscopy of SOAmodified
BaTiO3 nanoparticles suggested that the oleate molecules were bonded to the surfaces of
nanoparticles and formed a homogeneous layer having a thickness of about 2 nm. Furthermore, the
improved dispersion capability of the modified BaTiO3 nanoparticles in organic solvents was verified
through analytic results of its settling and rheological behaviors.

Keywords: Barium titanate, Nanoparticles, Hydrogen peroxide, Oleic acid, Dispersion

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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 329 (2009) 300–305 Contents lists

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

Versi lain/terkait

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