Ultrasonic Synthesis: Structural, Optical and Electrical Correlation of TiO2 Nanoparticles
Por:
Hernández-Perez I., Maubert A.M., Rendón L., Santiago P., Herrera-Hernández H., Arceo, LDB, Febles, VG, González E.P., González-Reyes L.
Publicada:
1 sep 2012
Categoría:
Electrochemistry
Resumen:
Sonochemical synthesis of nanometric anatase phase has been successfully produced at room temperature by using a simple and environment-friendly method. The effect of the heat treatment on the structural properties of the as-prepared sample has been evaluated and discussed in this research by X-ray powder diffraction and transmission electron microscopy techniques. The structural properties are expected to be strongly correlated with the optical band gap and electrical properties. The results show that the average size of nanocrystallites is in the order of 5 nm with large surface area, where as the system presents pores at the junctions of crystallites. Optical band gap of as-prepared sample has a blue shift, which could be attributed to a quantum size effect. The heat-treated reveals structural changes from anatase to rutile structure at 550 degrees C. Crystal size increase from 5 to 35 nm, in which anatase and rutile phases coexist. However, by electrochemical technique the high cur
Filiaciones:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, Mexico
Universidad Autónoma Metropolitana-Azcapotzalco, Departamento de Ciencias Básicas, Av. San Pablo No. 180, Col. Reynosa Tamaulipas, México, D.F. 02200, Mexico
Universidad Autónoma Metropolitana-Lerma, Departamento de Ciencias Básicas, Av. Hidalgo Pte. No. 46, Lerma, Estado de México 52000, Mexico
Instituto Mexicano del Petróleo, Laboratorio de Microscopia de Ultra Alta Resolución, Eje Central Lázaro Cárdenas Norte, 152 Col. San Bartolo Atepehuacán, México, D.F. 07730, Mexico
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