| Autor: |
Victoria Dimas B; Departamento de Ciencias Básicas, Universidad Autónoma Metropolitana-A, Av. Sn. Pablo No. 180, México D.F. 02200, Mexico., Hernández Pérez I; Departamento de Ciencias Básicas, Universidad Autónoma Metropolitana-A, Av. Sn. Pablo No. 180, México D.F. 02200, Mexico., Garibay Febles V; Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas Norte 152 Col. San Bartolo Atepehuacan, México D.F. C.P 07730, Mexico., Díaz Barriga Arceo L; Departamento de Ingeniería Metalúrgica y Materiales, Instituto Politécnico Nacional, ESIQIE-UPALM, México D.F. 07738, Mexico., Suárez Parra R; Instituto de Energías Renovables, IER-UNAM. Priv. Xochicalco S/N, Temixco, Morelos 62580, Mexico., Rivera Olvera JN; Tecnológico Nacional de México/ TES Ixtapaluca. TESI, Km. 7 de la carretera Ixtapaluca-Coatepec s/n, Ixtapaluca, Estado de México C.P.56580, Mexico., Luna Paz R; Departamento de Ciencias Básicas, Universidad Autónoma Metropolitana-A, Av. Sn. Pablo No. 180, México D.F. 02200, Mexico., Melo Máximo DV; Tecnológico de Monterrey, Escuela de Ingeniería y Ciencias, Carretera Lago de Guadalupe km 3.5, Atizapán de Zaragoza C.P. 52926, Mexico., González Reyes L; Departamento de Ciencias Básicas, Universidad Autónoma Metropolitana-A, Av. Sn. Pablo No. 180, México D.F. 02200, Mexico. |
| Abstrakt: |
To date, the formation mechanisms of TiO 2 , as well as its heterostructures, have not been clarified. Moreover, detailed research on the transition from a tetragonal anatase phase to the monoclinic phase of the TiO 2 (B) phase and their interface structure has been quite limited until now. In the present study, we report on the sonochemical synthesis of TiO 2 -anatase with a crystallite size of 5.2 ± 1.5 nm under different NaOH concentrations via the hydrothermal method. The use of alkaline solution and the effect of the temperature and reaction time on the formation and structural properties of TiO 2 -anatase nanopowders were studied. The effects of NaOH concentration on the formation and transformation of titanate structures are subject to thermal effects that stem from the redistribution of energy in the system. These mechanisms could be attributed to three phenomena: (1) the self-assembly of nanofibers and nanosheets, (2) the Ostwald ripening process, and (3) the self-development of hollow TiO 2 mesostructures. |
