Control synthesis of anatase TiO2 nanobelts via alkali-hydrothermal method for the optimal conditions

TiO 2 nanobelts with different synthesis methods have been actively pursued for a long time, however, a systematic study corresponding to the fabrication of TiO 2 nanobelts by alkali-hydrothermal method has not been worked out by any research. Here, we systematically study the conditions such as the source of Ti and hydrothermal parameters with the assistance of X-ray diffraction (XRD), scanning electron microscope (SEM), N 2 -sorption measurement and photochemical tests. The XRD and SEM measurements show that the TiO 2 nanobelts exhibit excellent belt-like structures and high crystalline intensity when using tetrabutyl titanate (Ti(OBu) 4 ) as the source of Ti, the volume of 10 mol/L NaOH is 15 mL, the hydrothermal reaction is conducted at 180 °C for 20 h and the heat treatment system is 800 °C for 2 h. The length–diameter ratio of the final obtained sample is about 130 and the specific surface area is 50.4 m 2 /g.