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

机译:形态对A-TiO 2 纳米材料热力学功能的影响

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The thermodynamic functions of A-TiO 2 nano-materials with different shapes (nanowires, nanotubes,nanoflakes and nanoparticles) were investigated by Faraday's law and open-circuit potentiometry. Theresults showed that the A-TiO 2 nanoparticles have the highest chemical activity (nanoparticles >nanoflakes > nanotubes > nanowires) at the same size, and the corresponding free energies and enthalpyare ΔG=-895.59kJ·mol -1 , ΔS=76.09J·K -1 mol -1 , ΔH=847.21kJ·mol -1 ;However, the stability ofA-TiO 2 nanowires is the best (nanowires > nanotubes > nanoflakes > nanoparticles), and the ionicdiffusion coefficient is lower than other structures (nanowires < nanotubes < nanoflakes < nanoparticles).There are more surface-active spots in nanometer-sized A-TiO 2 , which makes it more likely to loseelectrons in the equilibrium state. This work intends to provide a reference for the design and analysisof various nanostructured materials.
机译:通过法拉第定律和开路电位法研究了不同形状的A-TiO 2纳米材料(纳米线,纳米管,纳米薄片和纳米颗粒)的热力学功能。结果表明,相同尺寸的A-TiO 2纳米颗粒具有最高的化学活性(纳米颗粒>纳米片>纳米管>纳米线),相应的自由能和焓为ΔG= -895.59kJ·mol -1,ΔS= 76.09J· K -1 mol -1,ΔH= 847.21kJ·mol -1;然而,A-TiO 2纳米线的稳定性最好(纳米线>纳米管>纳米片>纳米粒子),离子扩散系数低于其他结构(纳米线<纳米级A-TiO 2中存在更多的表面活性点,这使其更有可能在平衡状态下失去电子。这项工作旨在为各种纳米结构材料的设计和分析提供参考。

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