Banca de DEFESA: VANESSA SANTOS FONSECA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : VANESSA SANTOS FONSECA
DATA : 12/04/2019
HORA: 09:00
LOCAL: Sala de aulas do PPGCEM
TÍTULO:

SYNTHESIS, CHARACTERIZATION AND STUDY OF THE PHOTOCATALITICAL PROPERTIES OF CuO AND COMPOUND CuO / ZnO

PALAVRAS-CHAVES:

Hydrothermal, CuO, EDA, ZnO, Composite, Photocatalysis.

PÁGINAS: 70
GRANDE ÁREA: Engenharias
ÁREA: Engenharia de Materiais e Metalúrgica
SUBÁREA: Materiais Não-Metálicos
ESPECIALIDADE: Cerâmicos
RESUMO:

Due to the large number of industries and the excessive amount of pollutants they produce, the environment and humans are increasingly exposed to risks. One of the main agents in water pollution is the toxic dyes, produced mostly by the textile industries. Because they have complex structures, they are difficult to degrade, and advanced oxidative processes (POAs) are an efficient alternative in the degradation of these organic compounds. In this work, copper oxide (CuO) nanoparticles were synthesized by microwave assisted hydrothermal method, with the addition of ethylenediamine surfactant. Synthesis of pure CuO and addition of 1, 2 and 3 ml of EDA were performed at 140 ° C for 30 min. The nanoparticles were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (SEM-FEG) and UV-Vis (UV-Vis) spectroscopy. In order to verify the photocatalytic property, degradation tests of the methylene blue dye were carried out. The results of X-ray diffraction confirmed CuO formation, and all the samples showed photocatalytic activity. In addition, ZnO nanoparticles were synthesized in this work and a CuO 3 EDA / ZnO composite was prepared by microwave assisted hydrothermal method at 140 ° C for 30 min in order to obtain more satisfactory results of photocatalysis than those obtained for CuO samples previously done. This material was characterized via DRX, MEV-FEG and degradation tests of the methylene blue dye were performed. The results confirmed the formation of the composite and it showed superior photocatalytic activity than the CuO samples.

MEMBROS DA BANCA:
Externo ao Programa - 2941160 - JOSE HERIBERTO OLIVEIRA DO NASCIMENTO
Externo à Instituição - JUAN ALBERTO CHAVEZ RUIZ - CTGás
Presidente - 1883170 - MAURICIO ROBERTO BOMIO DELMONTE