TY - JOUR
T1 - Characterization of hydrated titanium oxide with sheet-like and tube-like structures prepared by a hydrothermal processing
AU - Fuentes, S.
AU - Zárate, R. A.
AU - Espinoza, R.
AU - Leyton, P.
AU - Diaz-Droguett, D. E.
AU - Fuenzalidae, V. M.
PY - 2011
Y1 - 2011
N2 - Hydrated titanium oxides structures have been synthesized successfully from rutile by a single-step hydrothermal process at 130 °C in NaOH at concentrations of 5 M and 10 M, monitoring up to two days. Field emission scanning electron microscopy (FEG-SEM) and transmission electron microscopy (TEM) images indicate that samples treated at 5M were composed of sheet-like structures, while nanotubes were mainly found at 10 M. XRD analysis for both concentrations indicated presence of two phases, hydrated titanium oxide not indexed yet and rutile. Besides, X-ray diffraction (XRD) patterns of the samples treated at 10 M exhibited high reflections from the nanostructures, i.e., they possess high crystallinity. Thermogravimetry Analysis (TGA) indicated that the nanostructures show crystallized water in their matrix, specifically it was found that this hydrated phase has half molecule of occluded water per unit cell. This result is consistent with Raman spectroscopy that corroborates the existence of crystallization water in the synthesized product, by a deep profile of hydrated titanium oxide.
AB - Hydrated titanium oxides structures have been synthesized successfully from rutile by a single-step hydrothermal process at 130 °C in NaOH at concentrations of 5 M and 10 M, monitoring up to two days. Field emission scanning electron microscopy (FEG-SEM) and transmission electron microscopy (TEM) images indicate that samples treated at 5M were composed of sheet-like structures, while nanotubes were mainly found at 10 M. XRD analysis for both concentrations indicated presence of two phases, hydrated titanium oxide not indexed yet and rutile. Besides, X-ray diffraction (XRD) patterns of the samples treated at 10 M exhibited high reflections from the nanostructures, i.e., they possess high crystallinity. Thermogravimetry Analysis (TGA) indicated that the nanostructures show crystallized water in their matrix, specifically it was found that this hydrated phase has half molecule of occluded water per unit cell. This result is consistent with Raman spectroscopy that corroborates the existence of crystallization water in the synthesized product, by a deep profile of hydrated titanium oxide.
KW - Hydrothermal
KW - Raman spectroscopy
KW - Sheets
KW - Tubes
KW - X-ray diffraction
UR - http://www.scopus.com/inward/record.url?scp=84856090309&partnerID=8YFLogxK
U2 - 10.4067/S0717-97072011000300002
DO - 10.4067/S0717-97072011000300002
M3 - Article
AN - SCOPUS:84856090309
VL - 56
SP - 729
EP - 733
JO - Journal of the Chilean Chemical Society
JF - Journal of the Chilean Chemical Society
SN - 0717-9324
IS - 3
ER -