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Abstract
Spherical Zn Al2O4 nanoparticles with uniform size distribution were synthesized by a modified polyacrylamide gel method, and three xerogel Zn Al O samples with different ratios of Zn to Al were prepared. X-ray diffraction analysis results show that the Zn Al2O4 powders can be obtained after calcination at 900℃ for the two xerogel samples with mole ratios of Zn2 +:Al3 +=1:1.8 and 1:2, respectively. Scanning electron microscope images reveal that the particle size of the sample with mole ratio of 1:2 increases with the increasing calcination temperature; when calcination at 900℃, significant agglomeration of particles can be observed. The photoluminescence emission spectrum for Zn Al2O4 nanoparticles detected at λex= 352 nm shows a blue emission peak located at 469 nm. Finally, the chelating mechanism and luminescence mechanism of Zn Al2O4 nanoparticles have been discussed based on the experimental results.
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