Jurnal Maternatika dan SainsVo!. 8 No. 1, Maret 2003; hal I --0

Nanocomposite of Zine Oxide and Silica With Stable Luminescence

Mikrajuddin *rDepartment of Physics,

Faculty of Mathematics and Natural Science.Institut Teknologi Bandung

Jl. Ganesa 10 Bandung 40132 Indoensia

Received April 2002, accepted for publication September 2002

Abstract

lN1,znor:-o•npsite of zinc oxide (ZnO) and silica (Si0_) has been produced by spray drying the mixture of ZnO and SiO,( r) loids- Initiorr'ly, ZnO colloid was produced by hydrolizing zinc acetate in ethanol solution and then reacted with`t!f1,?um h,vdroxide solution. Colloid of ZnO containing manometer-scaled particles was mixed with SiO,, colloid at

1 1 L- !,>- u" lions, atomized usi,lrg an ultrasonic nebulizer and dried in a vertical reactor using nitrogen carrier gas.

v.,.rluced powder shovred a time independent luminescence spectra that is important for industrial applications.

<?rds ,° Colloid, Luminescence, 1vanocomposites; Nanoparticles; Spray drying.

Nanokomposit dari Zinc Oxcida (Zn0) dan silika (Si0) telah diproduks°i dengan spray drying campuran koloid Z,nOkoloid Zn0 dibuat melalui hidrolisis zinc asetat di dalam pelarut etanol yang kemudian

: -err litium hidroksida. Koloid ZnO yang mengandung partikel berukuran nano dicampurwrtevtu, kemudian di atomisasi menggunakan nebulizer ultrasonik clan drkeringkan

alcnrr aliran gas nitrogen. Serbuk yang dihasilkan memperlihatkan

ketidabergantungan spektrum luminisensi terhadap waktu, yang sangat penting bagi aplikasi industri.