Crystallization of amorphous anodized TiO₂ nanotube arrays

Abstract

Amorphous anodized TiO2 nanotube arrays show amorphous-to-anatase transition. The amorphous–anatase mixed structure significantly improved Li-ion battery performance.

Effect of Calcination Temperature on Phase, Morphology, and Optical Properties of TiO2 Nanoparticles and Boron Nitride Decorated TiO2 Nanotubes

“…36 The BET method was utilized to calculate the SSA, as described in eq 9. 32 = × D SSA 6 10 3 p (9) where ρ the density of the material and D p denotes the crystal size. With an increase of calcination temperature, the crystallite size of the NPs increases.…”

“…Furthermore, such studies can guide the synthesis of materials with improved thermal stability and performance, addressing specific needs in high-temperature environments. 9 This study delves into the impact of different calcination temperatures on the optical properties, phase transitions, and morphologies of TiO 2 NPs and BN-TNTs. While different calcination temperatures for TiO 2 NPs have been reported in the literature, corresponding studies for BN-TNTs have not been reported.…”

“…Anisotropy significantly impacts the phase stability of TiO 2 NPs by influencing their thermodynamic and kinetic properties . In TiO 2 NPs, the anisotropic shapes, such as rods or sheets, exhibit distinct surface energies and chemical reactivities compared to isotropic shapes like spheres. , For instance, the anatase phase, typically more stable at the nanoscale due to lower surface energy, can be further stabilized or destabilized depending on the specific anisotropic shape and corresponding surface facets exposed . Anisotropic shapes can also alter the transition temperatures and pathways between phases, potentially facilitating phase transitions at lower temperatures or through different mechanisms than those observed in isotropic NPs .…”

“…This understanding is vital for predicting the behavior of these materials under extreme conditions, thereby enhancing their applications in fields such as catalysis, energy storage, and electronics. Furthermore, such studies can guide the synthesis of materials with improved thermal stability and performance, addressing specific needs in high-temperature environments …”