Synthesis and Characterization Nanoparticles ZnAl_1.94(Yb:Er)_0.06O₄ Functionalized with Chitosan

Abstract:

This work aims to synthesize combustion reaction, functionalized with chitosan nanoparticles and characterize ZnAl_1.94(Yb:Er)_0.06O₄, codoped with x = 0.06 mol in the proportion 5:1 of Yb:Er. Nanoparticles before and after functionalization were characterized by XRD, TGA/DTA, FTIR and SEM. The results show that before and after functionalization presented ZnAl₂O₄ majority phase and Al₂Yb₄O as secondary phase. Multiple bands around 1100 cm^-1 and 1040 cm^-1 corresponding to the asymmetric stretching Si-O confirms the functionalization of nanoparticles. Nanoparticles presented before functionalization morphology heterogeneous, consisting of clusters of particles with near-spherical shape, large particle size distribution, consisting of large clusters with size around 3 µm and smaller clusters in the shape of plates with size in order of 0.5 µm. After functionalization, the morphology shows the formation of a film consisting of amorphous phase and crystalline phase. The mass loss for the nanoparticles before and after functionalization was 7.2 and 39%, respectively.

• Periodical: Materials Science Forum (Volumes 727-728)
• Pages: 263-268
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.727-728.263
• Online since: August 2012
• Authors: Cristiane M. Furtado, Pascally M.A. Guerra de Araújo, Patrícia T.A. dos Santos, Ana Cristina F. de M. Costa

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