Physicochemical Characterization and Catalytic Properties of Titania Gel Doped with Lithium and Rubidium |
| |
| Authors: | M Zamora T López R Gómez M Asomoza A GarcÍa-Ruiz X Bokhimi |
| |
| Institution: | (1) Departament of Chemistry, Universidad Autónoma Metropolitana, Iztapalapa, P.O. Box 55-534, México, 09340, D.F.;(2) Departament of Chemistry, Universidad Autónoma Metropolitana, Iztapalapa, P.O. Box 55-534, México, 09340, D.F.;(3) Instituto Mexicano del Petróleo, Programa de Ingeniería Molecular, Iztapalapa, P.O. Box 55-534, México, 09340, D.F.;(4) Departament of Chemistry, Universidad Autónoma Metropolitana, Iztapalapa, P.O. Box 55-534, México, 09340, D.F.;(5) Instituto Politécnico Nacional, UPICSA, México, D.F.;(6) UNAM, Instituto de Física, México, D.F.;(7) Instituto Mexicano del Petróleo, Programa de Ingeniería Molecular, México, D.F. |
| |
| Abstract: | The effect on titania of doping with lithium and rubidium titania gels has been studied in samples prepared with titanium (IV) tetra-n-butoxide co-gelling with the alkaline metal precursors. Titania and doped titania were characterized by X-Ray diffraction, which showed that the catalysts were nanostructured. In samples calcined at 400°C, the crystallite size of the anatase phase was 17 and 14 nm, and 78 and 38 nm for samples calcined at 600°C, for Li/TiO2 and Rb/TiO2, respectively. The specific surface areas of doped samples (400°C) are lower in Li/TiO2 (90 m2/g) than in Rb/TiO2(125 m2/g). Evaluation of their basic properties has been carried out in the acetone condensation reaction. It was found that the activity strongly depended on the Li and Rb ionic radii. |
| |
| Keywords: | titania-rubidium sol– gel doped titania acetone condensation titania-doped XRD |
| 本文献已被 SpringerLink 等数据库收录！ |
|
