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Type: Artigo de periódico
Title: Synthesis of recrystallized anatase TiO2 mesocrystals with Wulff shape assisted by oriented attachment
Author: Da Silva, RO
Goncalves, RH
Stroppa, DG
Ramirez, AJ
Leite, ER
Abstract: 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 (TiCl4) with n-octanol) to prepare re-crystallized anatase TiO2 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 TiO2-P25 as a benchmarking.
Country: Inglaterra
Editor: Royal Soc Chemistry
Citation: Nanoscale. Royal Soc Chemistry, v. 3, n. 4, n. 1910, n. 1916, 2011.
Rights: aberto
Identifier DOI: 10.1039/c0nr01016b
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

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