Banca de QUALIFICAÇÃO: SUYLAN LOURDES DE ARAÚJO DANTAS

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE : SUYLAN LOURDES DE ARAÚJO DANTAS
DATA : 21/06/2018
HORA: 08:30
LOCAL: Auditório PPGEQ
TÍTULO:

Synthesis and characterization of molybdenum carbides (Mo2C, Mo2C_Co and Mo2C_Ni) for photocatalytic degradation and adsorption of the dye Maxilon Blue GRL 300.

PALAVRAS-CHAVES:

synthesis, characterization, photocatalysis / adsorption, molybdenum carbide, cobalt, nickel.

PÁGINAS: 110
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Química
SUBÁREA: Processos Industriais de Engenharia Química
ESPECIALIDADE: Processos Inorgânicos
RESUMO:

The search for cheaper material production processes has been studied in recent years, mainly by the industries, in order to relate the cost / benefit associated with low risk to the environment, and the ease of transport and its use. The transition metal carbides are gaining emphasis, due to their catalytic activity, stability and selectivity in a wide range of reactions. The purpose of performing doping with cobalt and nickel on the molybdenum carbide is the search for the alteration in the carbide structure in order to improve its catalytic activity. The process of photocatalysis is based on a reaction that a semiconductor material is activated by the emission of sunlight or artificial on the particles with sufficient energy to excite the electrons of the band of valence for the conduction band that region between the bands is called " bandgap ". This work aims to develop the study of the synthesis, characterization and photocatalytic/adsorption application of semiconductor materials with carbide type structure, using the gas-solid reaction method in a fixed-bed reactor. These materials were characterized using the techniques of XRD, crystallite size, TGA, BET, grain size and SEM/EDS. With its characterization, it is possible to understand the relation between its structural properties and its activities as heterogeneous catalysts. The results of photocatalysis were satisfactory, the studied carbides obtained good yield in the process of degradation and adsorption of the dye. The best result was for Mo2C_Ni 5% in acid medium with yield around 97% degradation / adsorption of the dye.

MEMBROS DA BANCA:
Presidente - 349801 - CARLSON PEREIRA DE SOUZA
Interno - 2929066 - ANDRE LUIS LOPES MORIYAMA
Externo ao Programa - 338292 - JOAO BOSCO LUCENA DE OLIVEIRA
Externo à Instituição - FRANCISCO WENDELL BEZERRA LOPES - UnP