Banca de QUALIFICAÇÃO: GIRLENE GONÇALVES DO NASCIMENTO

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE : GIRLENE GONÇALVES DO NASCIMENTO
DATA : 26/04/2019
HORA: 09:00
LOCAL: Sala de aulas do PPGCEM
TÍTULO:

STUDY OF THE PHOTOCATALITIC AND PHOTOLUMINESCENT ACTIVITY OF THE MULTICAMATED FINE FILMS OF COPPER OXIDE (CuO) AND ZINC (ZnO) OXIDE DEPOSITED IN SILICON SUBSTRATE

PALAVRAS-CHAVES:

zinc oxide, copper oxide, polymeric precursors, photocatalysis, photoluminescence

PÁGINAS: 96
GRANDE ÁREA: Engenharias
ÁREA: Engenharia de Materiais e Metalúrgica
SUBÁREA: Materiais Não-Metálicos
ESPECIALIDADE: Cerâmicos
RESUMO:

Recent studies investigate a new class of inorganic materials that emerge as a promising option in high-performance applications in the field of photoluminescence and photocatalysis. The development of materials has opened new perspectives for the production of devices with highly efficient photoluminescent and photocatalytic properties, which have been particularly relevant in the fight against pollution of effluents resulting from industrial activity. Among the promising materials of technological interest are the semiconductors ZnO and CuO, which show good performance in optical and photocatalytic properties. In this work, polymeric resins of zinc oxide and copper oxide were synthesized by the polymeric precursor method, deposited in multilayers by the spin coating technique on silicon substrate. The resins, which had their viscosities adjusted to 20 cPs, were deposited in 6 ZnO / CuO alternating layers; CuO/ZnO; CuO/CuO and ZnO/ZnO and heat treated at 400 ° C and 500 ° C. The samples of the materials, both in the form of thin films and in powder form, were characterized by X-ray diffraction (XRD), Rietveld refinement, atomic force microscopy (AFM), infrared absorption spectroscopy (FTIR) UV-vis optical absorption spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (MET), photoluminescence (PL) and photocatalytic tests on the degradation of methylene blue dye. The results of the X-ray analysis of the samples in powder form confirm the presence of ZnO (hexagonal) and CuO (monoclinic) phases without secondary phases for both samples

MEMBROS DA BANCA:
Interna - 1802888 - FABIANA VILLELA DA MOTTA
Externo à Instituição - JUAN ALBERTO CHAVEZ RUIZ - ISI-ER
Presidente - 1883170 - MAURICIO ROBERTO BOMIO DELMONTE
Externo à Instituição - MAXYMME MENDES DE MELO - IFRN