Abstract:
Titanium oxide nanotubes (TNTs) were synthesized hydrothermally via microwave heating of commercial TiO₂ anatase in 10 M NaOH solution at 150°C for 90 min, followed by washing the obtained powder with distilled water. A part of samples was shaken in 0.1 M HCl solution to compare with the unshaken samples. Synthesized nanotubes were observed in random arrangement using Transmission electron microscope, showing multi-walled structure tubes with 5 and 9-12 nm for inner and outer diameters, respectively. The tube length was varied from 80 to around hundreds nm. XRD results exhibited the titanate phase of Na₂₋ᵪHᵪTi₃O₇. Acid shaking process to exchange Na⁺ to H⁺ ion increased the surface area and the pore volume of the TNTs.
