Synthesis of titanate nanotube from different phases of TiO2 powders and its hydrogen absorption capacity.
Titanate nanotubes were synthesized by hydrothermal method with different NaOH concentration using various TiO2 powders (P-25, rutile, anatase, and Ni doped TiO2) at 120 degrees C for 24 hrs. At 10 M NaOH, Ni doped TiO2 powders formed the titanate nanotubes which consisted of layered structure such as A2Ti2O5.H2O, A2Ti3O7, H2TiO.H2O (A = Na and/or H) with outer and inner diameter of approximately 10 nm and 6 nm. Ni doped nanotubes absorbed a small amount of hydrogen at 6 and 10 atm, however, uptake of hydrogen was 1.2 wt% at 20 atm.
Division of Materials Science and Engineering, Hanyang University, Seoul 133-791, Korea.
Dong Hyun
DH
Kim
Yi Hun
YH
Jung
Duck-Kyun
DK
Choi
Sun-Jae
SJ
Kim
Kyung Sub
KS
Lee