Authors: Müge Sarı Yılmaz Sibel Kasap Sabriye Pişkin
Publish Date: 2012/10/09
Volume: 112, Issue: 3, Pages: 1325-1333
Abstract
Titanate nanotubes were synthesized utilizing the hydrothermal method using titanium dioxide nanoparticles The experiments were carried out considering the process as a function of reaction temperature time NaOH concentration and the acidity of the washing solution The formation of titanate nanotubes was shown to be affected strongly by variations in any parameter The optimum conditions for the synthesis of titanate nanotubes were determined to be a reaction temperature of 190 °C and a reaction time of 12 h using 10 M NaOH concentration and the washing solution to have a pH of 55 In addition thermogravimetric analysis TG/DTG was used to investigate the thermal behaviour and dehydration kinetics of titanate nanotubes In order to better understand their thermal behaviour the thermal analysis of bulk hydrogen trititanate was performed The values of the apparent activation energies of the first and second dehydration stages for titanate nanotubes were 8144 ± 1585 and 8269 ± 746 kJ mol−1 respectively The values of the apparent activation energies of the first second and third dehydration stages for bulk hydrogen trititanate were 11593 ± 540 13758 ± 647 and 13897 ± 847 kJ mol−1 respectively
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