Banca de QUALIFICAÇÃO: DAYANE CAMPELO DE OLIVEIRA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : DAYANE CAMPELO DE OLIVEIRA
DATE: 29/05/2025
TIME: 08:00
LOCAL: Auditório do CCET
TITLE:

DEVELOPMENT OF PHOTOCATALYSTS BASED ON RUTHENIUM COMPLEXES

KEY WORDS:

Synthetic dyes; photocatalysis; ruthenium complexes; heterogeneous catalyst

PAGES: 70
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Química Inorgânica
SPECIALTY: Campos de Coordenação
SUMMARY:

The contamination caused by industrial effluents, especially those originating from the textile industry, poses a serious threat to aquatic ecosystems and human health. These effluents often contain toxic and persistent compounds, such as synthetic dyes, which are not fully removed by conventional treatment methods. Therefore, in order to propose new decontamination methodologies and address this issue, a study was carried out on the photocatalytic activity of ruthenium complexes of the type cis-[Ru(bpy)(phen)L₂](PF6)n, where L represents the ligands 4-(4-chlorobenzoyl)pyridine, H2O, and triphenylphosphine; bpy = 2,2'-bipyridine and phen = 1,10'-phenanthroline. These complexes were synthesized and characterized using UV-Vis spectroscopy, infrared spectroscopy, cyclic voltammetry, and computational studies. The photocatalytic study evaluated the complexes as heterogeneous catalysts for the degradation of the dye Remazol Red Ultra RGB, monitored by its maximum absorption band at 514 nm. The photodegradation performance was considered satisfactory, with the ruthenium catalysts achieving degradation rates of approximately 100%, 75.50% and 60.64% under different conditions. The results suggest that these ruthenium complexes are promising candidates for the treatment of textile industry effluents, with potential for application in sustainable industrial processes.

COMMITTEE MEMBERS:
Externo ao Programa - 1715109 - DANIEL DE LIMA PONTES - nullExterno ao Programa - 1945343 - FRANCISCO ORDELEI NASCIMENTO DA SILVA - nullPresidente - 1308577 - SIBELE BERENICE CASTELLA PERGHER
Interno - 2087667 - TIAGO PINHEIRO BRAGA