TY - GEN
T1 - TiO2 nanotubes of enhanced nanocrystallinity and well-preserved nanostructure by pre-annealing and post-hydrothermal treatments
AU - Yuwono, Akhmad Herman
AU - Ferdiansyah, Alfian
AU - Sofyan, Nofrijon Bin Imam
AU - Kartini, Indriana
AU - Pujianto, Tego Hadi
PY - 2011
Y1 - 2011
N2 - In the current investigation, a modified process combining pre-annealing and post-hydrothermal treatments has been applied on the as-dried TiO 2 nanotubes derived from alkaline route of TiO2 P25 nanoparticles in 10 M NaOH solution. The combined treatment is purposely aimed at enhancing the nanocrystallinity of anatase TiO2, while at the same time maintaining the integrity of the nanotube hollow structures. The detail of the structure, morphology and crystallinity of the resulting nanotubes were examined by XRD, SEM and TEM, while the optical properties of nanotubes were investigated by UV-visible spectroscopy. For the nanotube samples which have been previously annealed at 300°C, the crystallite size of anatase TiO 2 in nanotubes increased from 17.20 to 18.30 nm after being subjected to post-hydrothermal treatment at 100 to 150°C. The band gap energy (E g) of the resulting nanotubes is inversely proportional to the crystallite size of anatase phase where the lowest value of 3.21 eV was obtained from the TiO2 nanotube sample with the biggest crystallite size of 18.30 nm.
AB - In the current investigation, a modified process combining pre-annealing and post-hydrothermal treatments has been applied on the as-dried TiO 2 nanotubes derived from alkaline route of TiO2 P25 nanoparticles in 10 M NaOH solution. The combined treatment is purposely aimed at enhancing the nanocrystallinity of anatase TiO2, while at the same time maintaining the integrity of the nanotube hollow structures. The detail of the structure, morphology and crystallinity of the resulting nanotubes were examined by XRD, SEM and TEM, while the optical properties of nanotubes were investigated by UV-visible spectroscopy. For the nanotube samples which have been previously annealed at 300°C, the crystallite size of anatase TiO 2 in nanotubes increased from 17.20 to 18.30 nm after being subjected to post-hydrothermal treatment at 100 to 150°C. The band gap energy (E g) of the resulting nanotubes is inversely proportional to the crystallite size of anatase phase where the lowest value of 3.21 eV was obtained from the TiO2 nanotube sample with the biggest crystallite size of 18.30 nm.
KW - TiO nanotubes
KW - amorphous
KW - enhanced nanocrystallinity
KW - post-hydrothermal
UR - http://www.scopus.com/inward/record.url?scp=84255171420&partnerID=8YFLogxK
U2 - 10.1063/1.3667246
DO - 10.1063/1.3667246
M3 - Conference contribution
AN - SCOPUS:84255171420
SN - 9780735409927
T3 - AIP Conference Proceedings
SP - 159
EP - 162
BT - 4th Nanoscience and Nanotechnology Symposium, NNS 2011 - An International Symposium
T2 - 4th Nanoscience and Nanotechnology Symposium, NNS 2011
Y2 - 23 September 2011 through 25 September 2011
ER -