Preparation and Characterization of Al₂O₃ Nanoparticles with Dodecyl Trimethyl Ammonium Bromide as Surfactant

Abstract

nanoAl2O3 has been synthesized by homogeneous precipitation method using dodecyl trimethyl ammonium bromide (DTAB) as surfactant. The as-prepared powder was characterized by FT-IR, XRD, TEM and SEM. The results indicate the surfactant existence in the precursors but disappeared in the products. This is mainly due to the combination of precursor and surfactant, which results in particles of nanosize. The nucleation and growth rate during the precipitation has also been controlled by the addition of surfactant. During the calcination process, the surfactant has decomposed and volatilized into air. The XRD characterization shows the calcined powders were γ-Al2O3 particles with mean size of 27 nm, which was in accordance with TEM characterization. The morphology of the prepared alumina particles has also been investigated by SEM and showed that the powder has a spherical morphology with a uniform particle size.

STUDI PENGARUH VARIASI SUHU PERLAKUAN PANAS TERHADAP STRUKTURMIKRO DAN KOROSIFITAS PADA PELAPISAN SS 410 MENGGUNAKAN KOMPOSIT Ni-P-NANO PARTIKEL Al2O3

“…Serbuk nano alumina ini dicampur air distilasi kemudian diultrasonik selama 30 menit [11]. Komposisi bahan untuk membuat larutan dalam bath dipilih berdasarkan komposisi optimum dari beberapa referensi [9,[12][13][14].…”