Hybrid Films Photoluminescence of Chitosan/ZnAl₂O₄

Abstract:

This work reports the photoluminescence chitosan/ZnAl₂O₄ films in mass ratios 1:1, 1:2, 1:3, 1:4 and 1:5, respectively. The films were presented flexible, opaque, with a thickness of 0.04 mm and were characterized by XRD, FTIR, emission and excitation. The results show the presence of characteristic peaks of chitosan and ZnAl₂O₄, and bands related to the presence of chitosan, silanol and siloxane groups and silane agent used in surface modification ZnAl₂O₄, which acts as a binding agent with the chitosan all movie reviews. The excitation and emission spectra showed the presence of broadband processes associated with charge transfer from Al ⁺³ the O^-2 in all the films, and that the highest photoluminescence intensities were observed for the films 1:1 and 1:2, which showed higher concentrations than the concentrations Qs 1:3, 1:4 and 1:5. Thus, Qs acted as a binder, transferring energy to Al ⁺³ the O^{- 2}.

• Periodical: Materials Science Forum (Volume 820)
• Pages: 205-210
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.820.205
• Online since: June 2015
• Authors: Pascally M.A.G. Araújo, Polyana T.A. Santos, Patrícia T.A. Santos, Ana Cristina Figueiredo de Melo Costa
• Keywords: Chitosan, Films, Photoluminescence (PL), ZnAl₂O₄

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