Banca de QUALIFICAÇÃO: MARCIA ADRIANA CORDEIRO DUARTE NUNES

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : MARCIA ADRIANA CORDEIRO DUARTE NUNES
DATA : 08/11/2019
HORA: 15:00
LOCAL: cefet campus vi
TÍTULO:

Hydrothermal Synthesis of Molybdenum Oxide Nanofibers for Application in Selective Oxidation Reactions

PALAVRAS-CHAVES:

Molybdenum; NFMo; Catalyst; Oxidation; ODS

PÁGINAS: 53
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Química
SUBÁREA: Química Inorgânica
RESUMO:

In recent years, molybdenum oxide catalysts have been prominent in applications involving oxidation of organic substrates with hydrogen peroxide. In this work, molybdenum oxide (NFMo) nanofibers were synthesized by simple hydrothermal treatment of bis (acetylacetonate) -dioxomolbdenum (VI) (MoO2 (acac) 2) in aqueous solution, without the need for surfactants or other growth directives. . This material was characterized and applied as a catalyst in oxidation reactions of various organic substrates in the presence of hydrogen peroxide or TBHP as oxidants.
The synthesized NFMo were characterized by XRD, IR, Raman, SEM, TG, N2 Physisorption. The results confirmed the obtaining of MoO3 orthorhombic crystalline phase and allowed the observation of well defined and uniform morphology of the material. Subsequently, NFMo were applied in selective oxidation reactions of sulfur compounds such as DFS, MFS, DBT and BT, and showed excellent catalytic activity under mild reaction conditions. The catalyst also showed good oxidation efficiency of other organic substrates, such as pyridine, quinoline and 5-HMF, and was effective for olefin epoxidation in the presence of TBHP.
The obtained results indicate that the studied catalyst presented great potential in selective oxidation reactions, proving very promising for applications in ODS reactions.

MEMBROS DA BANCA:
Interna - PATRICIA SANTIAGO DE OLIVEIRA PATRICIO
Interna - RAQUEL VIEIRA MAMBRINI