Solid State Science and Technology, Vol. 15, No 1 (2007) 30-42

ISSN 0128-7389

Corresponding Author: irmawati@fsas.upm.edu.my

30

EFFECT OF SODIUM HYDROXIDE CONCENTRATION ON THE

PHYSICOCHEMICAL CHARACTERISTIC OF α-Bi2O3  NANOCRYSTALS

Irmawati Ramli, Chen May Tze and Taufiq-Yap Yun Hin

 

Department of Chemistry, Faculty of Science,

Universiti Putra Malaysia, 43400 Serdang, Selangor Darul Ehsan

 

ABSTRACT

The  effect  of  different  concentration  of precipitating  agent  on  the  characteristic  of bismuth oxide was investigated by precipitating bismuth salt solution with sodium hydroxide. The solids obtained were oven dried at 353 K to form a mixed phases precursors. Upon calcination in air at 723 K for 5h has transformed the precursors into a highly pure α-Bi2O3   nanocrystals. The particles were in the nanometer range between42 to 58 nm. The oxides were further characterized by means of XRD, SEM and FTIR.On the reduction activity study, bismuth oxide which was prepared using low concentration of NaOH has led to a better reduced activity characteristic. The oxygen removed was of chemically bonded species as reckoned by the high reduction activation energy displayed.

 

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