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 TiO2
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, TiO2 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.
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