Propiedades estructurales, morfológicas y ópticas de nanopartículas de Mn3O4 obtenidas por método Sol-Gel a diferente concentración de NaOH
No Thumbnail Available
Date
2023
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Universidad Nacional de Trujillo
Abstract
Se sintetizaron nanopartículas de Mn3O4 mediante el método sol-gel en agua y alcohol, para evaluar el efecto de la concentración de NaOH sobre las propiedades estructurales, ópticas y morfológicas; las propiedades estructurales y vibracionales se analizaron por difracción de rayos X, espectroscopía Raman y FTIR, las propiedades ópticas se evaluaron a través de espectroscopía UV-Vis y Fotoluminiscencia, la morfología se evaluó mediante microscopía electrónica de barrido, entre los resultados más importantes está el método de síntesis que es de un solo paso y de corto tiempo, estructuralmente el tamaño de cristalito es lo que más se afecta por la concentración de NaOH, ópticamente el ancho de banda prohibida aumenta según aumenta la concentración de NaOH, del mismo modo que las vacancias de oxígeno en la estructura, se han obtenido nanopartículas esféricas con tamaños que van desde los 20nm hasta los 90nm sin efecto significativo del NaOH
ABSTRACT Nanoparticles of Mn3O4 were synthesized using the sol-gel method in water and alcohol to assess the effect of NaOH concentration on structural, optical, and morphological properties. Structural and vibrational properties were analyzed through X-ray diffraction, Raman spectroscopy, and FTIR, while optical properties were evaluated using UV-Vis spectroscopy and photoluminescence. Morphology was assessed through scanning electron microscopy. Among the most significant findings, the synthesis method was a one-step process with a short duration. Structurally, the crystallite size was most affected by the NaOH concentration. Optically, the bandgap width increased with increasing NaOH concentration, along with oxygen vacancies in the structure. Spherical nanoparticles ranging in size from 20nm to 90nm were obtained with no significant effect from NaOH
ABSTRACT Nanoparticles of Mn3O4 were synthesized using the sol-gel method in water and alcohol to assess the effect of NaOH concentration on structural, optical, and morphological properties. Structural and vibrational properties were analyzed through X-ray diffraction, Raman spectroscopy, and FTIR, while optical properties were evaluated using UV-Vis spectroscopy and photoluminescence. Morphology was assessed through scanning electron microscopy. Among the most significant findings, the synthesis method was a one-step process with a short duration. Structurally, the crystallite size was most affected by the NaOH concentration. Optically, the bandgap width increased with increasing NaOH concentration, along with oxygen vacancies in the structure. Spherical nanoparticles ranging in size from 20nm to 90nm were obtained with no significant effect from NaOH
Description
Keywords
Óxido de manganeso, sol gel, nanopartículas