Title
A short solid-state synthesis leading to titanate compounds with porous structure and nanosheet morphology A short solid-state synthesis leading to titanate compounds with porous structure and nanosheet morphology
Author
Faculty/Department
Faculty of Sciences. Chemistry
Publication type
article
Publication
Amsterdam ,
Subject
Physics
Chemistry
Source (journal)
Microporous and mesoporous materials: zeolites, clays, carbons and related materials. - Amsterdam
Volume/pages
147(2012) :1 , p. 53-58
ISSN
1387-1811
ISI
000295906200007
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
A novel method was developed for the synthesis of titanate nanosheets with high surface area. A solid-state mixture of NaOH and TiO2 was reacted at 600 °C for several minutes. The aqueous dispersion of the resulting melt was aged at room temperature for periods up to 14 days. After hydrochloric acid treatment and washing procedures, the reaction product was characterized by X-ray diffraction, Raman spectroscopy, N2-sorption and small-angle X-ray scattering measurements. The titanate compound not subjected to the aging process was amorphous and possessed a microporous framework, while the aged samples displayed nanosheet morphology and high specific surface area (396509 m2 g−1). It was revealed that the very short heat treatment is of crucial importance for the titania-titanate phase transformation, while the aging process is needed for the morphological evolution of the titanate samples. The effects of the aging time on the structure and the morphology are discussed.
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