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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Da Silva, Rafael O. [1] ; Goncalves, Ricardo H. [1] ; Stroppa, Daniel G. [2, 3] ; Ramirez, Antonio J. [2] ; Leite, Edson R. [1]
Total Authors: 5
[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
Total Affiliations: 3
Document type: Journal article
Source: NANOSCALE; v. 3, n. 4, p. 1910-1916, 2011.
Web of Science Citations: 51

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)

FAPESP's process: 98/14324-0 - Multidisciplinary Center for Development of Ceramic Materials
Grantee:Elson Longo da Silva
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC