La síntesis de las partículas de TiO2 se realizó mediante la técnica sol-gel asistida conradiación ultrasónica a partir de una solución alcohólica de isopropóxido de titanio. Luegose sometió a un tratamiento térmico en atmósfera de aire a 350 ºC por 1 h. Difracción derayos X y microscopía electrónica de transmisión confirmaron que el tamaño de los dominioscristalinos se encuentran entre 10 y 37 nm. El estudio de espectroscopía infrarroja confirmala presencia de grupos -OH en la superficie del TiO2. La modificación de la morfología y elárea superficial, debido a la influencia del tiempo de exposición a la radiación ultrasónica,se evidencia con los estudios de microscopía electrónica de barrido y BET, respectivamente.Las propiedades del TiO2 obtenido se estudiaron monitoreando la degradación de solucionesde anaranjado de metilo en presencia de radiación UV-A. S...

The present study has as main objecuve the search of new materials, among them the porous materials whose diversity of pore diameter confers lO the same specific properties, those that in turn determine a series of applications like adsorbents. catalysts, and shield materials, among others. The investigatíon consists of the synthes1s of macroporous materials by the method Sol-Gel, using reactive of low cost as sodium silicate (silicon source) and includes/understanos the following stages: 1) control of hydrolysis of the inorganic precursors: 2) formatíon oí the rnacrostructure material (hydrothermal synthesis) and 3) elimination of the organic matter by calcinations. The structural characterization and the degree of crystalinidad were made by means of Diffraction of Rays-X (DRX) and Electronic Diffraction of Area Selecta.(DEAS), whereas the morphologic analysis was made through an Ele...

The present study has as main objecuve the search of new materials, among them the porous materials whose diversity of pore diameter confers lO the same specific properties, those that in turn determine a series of applications like adsorbents. catalysts, and shield materials, among others. The investigatíon consists of the synthes1s of macroporous materials by the method Sol-Gel, using reactive of low cost as sodium silicate (silicon source) and includes/understanos the following stages: 1) control of hydrolysis of the inorganic precursors: 2) formatíon oí the rnacrostructure material (hydrothermal synthesis) and 3) elimination of the organic matter by calcinations. The structural characterization and the degree of crystalinidad were made by means of Diffraction of Rays-X (DRX) and Electronic Diffraction of Area Selecta.(DEAS), whereas the morphologic analysis was made through an Ele...