ABSTRACT In this article, the isoconversional crystallization behavior of TiO2 nanoparticles prepared using titanium glycolate and titanium malate water-soluble precursors at alkaline and acidic conditions was investigated. Thermal decomposition experiments were carried out using thermo gravimetric (TG) analysis and the phase structure was determined by powdered X-ray diffraction (PXRD) analysis. The phase stability of the TiO2 NPs prepared using titanium malate complex was found to be better than that prepared using titanium glycolate water-soluble complex, especially in terms of loss in weight per cent and decomposition analysis. Apparent activation energies were also determined for both the samples prepared at pH 2, 4, 6, 8, 10 and 12. These results showed the ability of primary and secondary nucleation in shifting decomposition temperature that in turn increases the phase transformation temperature, by minimizing the energy through fraction reacted required to reach the crystalline state.

中文翻译：

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水热法制备单、二α-羟基酸水溶性前驱体制备TiO2纳米颗粒相变的热分析研究

摘要 在本文中，研究了使用乙醇酸钛和苹果酸钛水溶性前驱体在碱性和酸性条件下制备的 TiO2 纳米颗粒的等转化结晶行为。使用热重 (TG) 分析进行热分解实验，并通过粉末 X 射线衍射 (PXRD) 分析确定相结构。发现使用苹果酸钛络合物制备的 TiO2 NPs 的相稳定性比使用乙醇酸钛水溶性络合物制备的更好，尤其是在重量百分比损失和分解分析方面。还测定了在 pH 2、4、6、8、10 和 12 下制备的两种样品的表观活化能。