Banca de QUALIFICAÇÃO: KATHARINNE SABRINA NASCIMENTO TEIXEIRA
Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.DISCENTE: KATHARINNE SABRINA NASCIMENTO TEIXEIRA
DATA: 06/11/2015
HORA: 09:00
LOCAL: Auditório do Departamento de Química
TÍTULO:
SYNTHESIS AND CHARACTERIZATION OF A NEW HYBRID NANOMATERIAL CONTAINING COBALT PRUSSIAN BLUE ANALOGUE AND ZINC OXIDE NANOPARTICLES
PALAVRAS-CHAVES:
hybrid nanomaterial; cobalt Prussian blue analogue; zinc oxide nanoparticles; nanodevice.
PÁGINAS: 20
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Química
SUBÁREA: Química Inorgânica
ESPECIALIDADE: Campos de Coordenação
RESUMO:
A novel hybrid nanomaterial consisting from cobalt Prussian blue analogue (Co3[Co(CN)6]2) and zinc oxide nanoparticles (ZnO) was synthesized by co-precipitation method. ZnO was calcined at 300° C and functionalized with Co3[Co(CN)6]2. Structural, spectroscopic characterization and electrochemical properties of (Co3[Co(CN)6]2/ZnO) was performed by X-ray diffraction (XRD), electronic and vibrational spectroscopy in UV-Vis, Fourier Transformation Infrared (FTIR) and cyclic voltammetry. The electronic spectrum of Co3[Co(CN)6]2/ZnO exhibited two maximum absorptions at 247 and 204 nm, analogue features, and at 377 nm related to ZnO. An increase in baseline and Tyndall effect confirmed the formation of nanoscale material. According to crystallographic patterns of Co3[Co(CN)6]2 (JCPDS: 77-1161) and ZnO (JCPDS: 01-036-1451), clear crystalline peaks were observed from 10 to 80 degrees for Co3[Co(CN)6]2/ZnO, ten for Co3[Co(CN)6]2 and six for ZnO. FTIR spectra exhibited the characteristic vibrations of Co3[Co(CN)6]2 and ZnO. Voltammogram for Co3[Co(CN)6]2/ZnO exhibited electrochemical process form precursors materials. Moreover, in different potential ranges, showed dependence of processes, explaining the appearance of a second anodic process caused by the analogue interacting with the cathodic process of ZnO. All analyzes confirmed the formation of Co3[Co(CN)6]2/ZnO, which may found application in optoelectronic magnet nanodevice.
MEMBROS DA BANCA:
Presidente - 1508806 - WELTER CANTANHEDE DA SILVA
Interno - 1553988 - EDSON CAVALCANTI DA SILVA FILHO
Externo ao Programa - 1570906 - BARTOLOMEU CRUZ VIANA NETO
Externo à Instituição - ROBERTO ALVES DE SOUSA LUZ - UESPI