Effect of Morphology on the Thermodynamic function of A- TiO2 Nano-Materials

The thermodynamic functions of A-TiO2 nano-materials with different shapes (nanowires, nanotubes, nanoflakes and nanoparticles) were investigated by Faraday's law and open-circuit potentiometry. The results showed that the A-TiO2 nanoparticles have the highest chemical activity (nanoparticles > nanoflakes > nanotubes > nanowires) at the same size, and the corresponding free energies and enthalpy are AG=-895.59kJ • mol -1 , A S=76.09J • K -1 mol -1 , ΔH=847.21kJ • mol -1 ; However, the stability of A-TiO2 nanowires is the best (nanowires > nanotubes > nanoflakes > nanoparticles), and the ionic diffusion coefficient is lower than other structures (nanowires < nanotubes < nanoflakes < nanoparticles). There are more surface-active spots in nanometer-sized A-TiO2, which makes it more likely to lose electrons in the equilibrium state. This work intends to provide a reference for the design and analysis of various nanostructured materials.