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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Synthesis of recrystallized anatase TiO2 mesocrystals with Wulff shape assisted by oriented attachment

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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
Linha de fomento: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs