Banca de DEFESA: Fellipy Samuel Rocha

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : Fellipy Samuel Rocha
DATE: 19/07/2023
TIME: 14:00
LOCAL: videoconferência
TITLE:

"Study fo the copper(II)phthalocyanine tetrasulfonic acid tetrasodium salt (CuPcSO4) association with TiO2/Graphene nanocomposite with a photocatalytic overview".

KEY WORDS:

CuPcSO4, TiO2, graphene, absorbance, adsorption, photocatalysis

PAGES: 154
BIG AREA: Ciências Biológicas
AREA: Biologia Geral
SUMMARY:

Titanium dioxide TiO2 is one of the primary compounds for photocatalysis applications. Even though it has been extensively studied, there is still room to improve its photocatalytic properties and photoabsorption. TiO2 presents photocatalytic activity under uv-vis light; however, only 5% of solar energy is present in this region, while 45% comprises visible electromagnetic radiation. Phthalocyanines are studied due to their capacity to interact with visible light, and the copper(II)phthalocyanine tetrasulfonic acid tetrasodium salt (CuPcSO4) was associated with TiO2 and graphene (GR) attached to TiO2. TiO2-GR adsorbed CuPcSO4, and the photochemical behavior was studied. TiO2- GR adsorbed 26% more CuPcSO4 than TiO2 alone. The incorporation of CuPcSO4 onto the surface of TiO2-GR generates a bathochromic shift of the typical graphene response, which indicates that the adsorption of CuPcSO4 reduces the TiO2-GR bandgap. The CuPcSO4 presents a clearer separation of the Q band when adsorbed onto the TiO2 surface, and the Qy band becomes the primary one. The increase and shift in the Qy band indicate a stronger response for low-energy light sources for the phthalocyanine, hence improving the light-harvesting capability of the compound. TiO2-CuPcSO4 and TiO2-GR-CuPcSO4 interact with amphotericin B (amB), demonstrated by the drug absorbance's hypochromic shift, indicating a higher aggregation state. The energy and chemical compounds consumed during the synthesis contribute to the environmental impacts. It is important to elucidate the practical and economic advantages of functionalizing the material. A simplified life cycle analysis (LCA) was conducted with 1kg of catalyst production as a functional unit. The compounds with 30 wt% graphene presented 80% more impact in some categories. An applied engineering concept is added to visualize the viability of developing a pilot model for wastewater treatment. The hydraulic system idea was adopted with an effluent flow of 1 L/min to facilitate calculations. Heterogeneous catalysts are a promising process for environmental remediation.

COMMITTEE MEMBERS:
Externo à Instituição - ALISSON MENDES RODRIGUES - UFCG
Externo à Instituição - EDUARDO HENRIQUE DUARTE
Presidente - 1644041 - CLAURE NAIN LUNARDI GOMES
Externo ao Programa - 1315132 - ELTON CLEMENTINO DA SILVA - nullExterna ao Programa - 2091109 - VIVIAN DA SILVA SANTOS - null