Preparation and characterisation of tungstate scheelite structured nanoparticles

Zawawi, S.M.M. and Yahya, R. and Hassan, A. and Daud, M.N. (2011) Preparation and characterisation of tungstate scheelite structured nanoparticles. Materials Research Innovations, 15 (SUPPL.). S97-S100. ISSN 14328917

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Abstract

A series of tungstate scheelite structured MWO 4 (M=Ca, Sr, Pb and Ba) were synthesised using the sucrose solution evaporation method. Characterisation of these materials revealed that nanoparticles were formed, with the calcination temperature >400°C. The nanoparticle powders formed are crystalline and exist in its pure phase. It is found that the degree of crystalline products is low with the decrease in ionic radius (Ca<Sr<Pb<Ba), and also, diffraction peaks at the plane (112), (004) and (204) are shifted to lower angles (2θ) in accordance to the reduction in dhkl spacing. The S BET value of CaWO 4 gave the highest surface area (277·53 m 2 g -1) in the observed nanosize grain obtained from the field emission scanning electron microscopy image.

Item Type: Article
Uncontrolled Keywords: FESEM Scheelite Sucrose solution evaporation Tungstate XRD Barium Calcination Crystalline materials Evaporation Field emission microscopes Lead Phase transitions Scanning electron microscopy Sugar (sucrose) Tungstate minerals Nanoparticles
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Science > Dept of Chemistry
Depositing User: miss munirah saadom
Date Deposited: 08 Jul 2013 00:47
Last Modified: 11 Dec 2014 06:46
URI: http://eprints.um.edu.my/id/eprint/6745

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