| Texto completo | |
| Autor(es): |
Da Silva, Rafael O.
[1]
;
Goncalves, Ricardo H.
[1]
;
Stroppa, Daniel G.
[2, 3]
;
Ramirez, Antonio J.
[2]
;
Leite, Edson R.
[1]
Número total de Autores: 5
|
| Afiliação do(s) autor(es): | [1] Univ Fed Sao Carlos, Dept Chem, BR-13560 Sao Carlos, SP - Brazil
[2] Brazilian Synchrotron Light Lab, BR-13083970 Campinas, SP - Brazil
[3] Univ Estadual Campinas, Sch Mech Engn, Dept Mat Engn, BR-13083860 Campinas, SP - Brazil
Número total de Afiliações: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | NANOSCALE; v. 3, n. 4, p. 1910-1916, 2011. |
| Citações Web of Science: | 51 |
| Resumo | |
In this work, we describe a kinetically controlled crystallization process assisted by an oriented attachment (OA) mechanism based on a nonaqueous sol-gel synthetic method (specifically, the reaction of titanium(IV) chloride (TiCl(4)) with n-octanol) to prepare re-crystallized anatase TiO(2) mesocrystals (single crystal). The kinetics study revealed a multi-step and hierarchical process controlled by OA, and a high resolution transmission electron microscopy (HRTEM) analysis clearly shows that the synthesized mesocrystal presents a truncated bipyramidal Wulff shape, indicating that its surface is dominated by [101] facets. This shape is developed during the recrystallization step. The material developed here displayed superior photocatalytic activity under visible light irradiation compared to TiO(2)-P25 as a benchmarking. (AU) | |
| Processo FAPESP: | 98/14324-0 - Multidisciplinary Center for Development of Ceramic Materials |
| Beneficiário: | Elson Longo da Silva |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |