Banca de QUALIFICAÇÃO: SÂNZIA ARAÚJO MENDONÇA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : SÂNZIA ARAÚJO MENDONÇA
DATE: 29/08/2024
TIME: 18:00
LOCAL: auditório do Departamento de Química
TITLE:

ARTIFICIAL LEAVES: DEVELOPMENT OF SMART MATERIALS FOR CO₂ CAPTURE AND CONVERSION

KEY WORDS:

carbon dioxide; photoconversion; artificial photosynthesis; chlorophyll; semiconductors.

PAGES: 75
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Química Inorgânica
SPECIALTY: Foto-Química Inorgânica
SUMMARY:

Carbon dioxide (CO₂) emissions have increased significantly in recent decades due to population and industrial growth. Thus, different capture and conversion techniques have been developed, evolving towards producing economically viable materials derived from a polluting gas, cooperating for its mitigation in the atmosphere. The CO₂ photoconversion process (“artificial photosynthesis”) stands out among these technologies. Mimicking the natural photosynthesis process, this work aimed to develop a hybrid photocatalyst using a bacterial cellulose matrix, a porphyrin, and an oxide heteroconjugated in an S scheme. The porphyrin was extracted from the Brassica Oleracea plant, and V=O replaced its metallic center (Mg). The synthesis of TiO₂ as a titanium isopropoxide precursor produced a mixed oxide anatase:rutile, an efficient strategy to inhibit the recombination of the photogenerated pairs. Bacterial cellulose was made with the microorganism Komagataeibacter Xylinum in a HestrinSchram culture medium, with three generations of membranes being obtained for each culture. The matrix (bacterial cellulose) has high porosity, and the adsorption method was used for porphyrin impregnation, obtaining incorporation >95%.

COMMITTEE MEMBERS:
Externa à Instituição - DANIELLE DIAS NEVES - UFRPE
Interno - JOAO RUFINO DE FREITAS FILHO
Externo ao Programa - 3022573 - JUCLEITON JOSE RUFINO DE FREITAS - nullPresidente - WAGNER EDUARDO DA SILVA