Mestrado em Química - PPGQ

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Navegando Mestrado em Química - PPGQ por Autor "Bernardes, Yasmim Rafaella Caixeta Pinto"

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    Síntese, caracterização e investigação da propriedade luminescente do ZnO e do ZrO 2 dopados com európio e suas aplicações na ciência forense
    (Universidade Federal de Goiás, 2018-09-28) Bernardes, Yasmim Rafaella Caixeta Pinto; Figueiredo, Alberthmeiry Teixeira de; http://lattes.cnpq.br/7026388762536003; Figueiredo, Alberthmeiry Teixeira de; Sousa, Marcelo Henrique; Barrado, Cristiano Morita
    Recently, luminescent materials have aroused interest in the scientific and expert community due to their unique properties. These luminescent materials are being used in the production of papillary developers with excellent advantages over the commonly employed methods. These materials are based on inorganic matrices doped with TR 3+ ions. In the present work, zinc oxide (ZnO) and zirconium dioxide (ZrO 2 ) matrices with different concentrations of the earth-rare ion europium (III) were synthesized for the development of fingerprints. The materials were obtained by the sol-gel process and characterized by X-ray diffraction, photoluminescence and scanning electron microscopy to evaluate the structural properties. The XRD results showed ZnO hexagonal and ZrO 2 with different tetragonal and monoclinic phase compositions. The photoluminescent results indicated that the percentage of europium directly influences the optical properties of the synthesized materials. The synthesized materials revealed the fingerprint with clear contours that enable identification. The microscopic magnification allows visualizing the adherence of the materials by the residues of the fingerprints. Finally, the luminescent processes of Eu 3+ doped in different matrices provide the widening of the range of papillary developers. The results found contribute to the development of new materials for the development of fingerprints.