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Type: Artigo de periódico
Title: Interaction of Sodium Titanate Nanotubes with Organic Acids and Base: Chemical, Structural and Morphological Stabilities
Author: Rodrigues, CM
Ferreira, OP
Alves, OL
Abstract: This work reports the interaction of sodium titanate nanotubes (Na-TiNT) with aqueous solutions of benzoic and phenylphosphonic acids and of aniline. The Na-TiNT were obtained from hydrothermal treatment of TiO(2) in aqueous NaOH solution. The results obtained from FTIR, XRD, TEM and elemental analyses showed that the chemical, structural and morphological stability of the nanotubes is related to the medium (acidic or basic) and to the treatment conditions (temperature and contact time). A titanium(IV) alpha-phenylphosphonate phase was obtained from interaction between Na-TiNT and phenylphosphonic acid. The amount and crystallinity of the new phase were dependent of the contact time and temperature, respectively. On the other hand, TiO(2) or proton-rich titanate nanotubes were formed, depending on treatment conditions, from interaction between Na-TiNT and benzoic acid. When Na-TiNT interacted with aniline, no chemical, morphological or compositional change was observed.
Subject: titanium oxide
titanium oxide nanotubes
phase transformation
carboxylic acid
Country: Brasil
Editor: Soc Brasileira Quimica
Citation: Journal Of The Brazilian Chemical Society. Soc Brasileira Quimica, v. 21, n. 7, n. 1341, n. 1348, 2010.
Rights: aberto
Identifier DOI: 10.1590/S0103-50532010000700021
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

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