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首页> 外文期刊>Journal of nano research >Synthesis and Characterization of TiO2 Doped CeO2 Nanopowders by a Hydrothermal Process
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Synthesis and Characterization of TiO2 Doped CeO2 Nanopowders by a Hydrothermal Process

机译：TiO2掺杂CeO2纳米粉体的水热合成与表征。

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Hydrothermal processes have the potential for the direct preparation of crystalline ceramic powders and offer a low-temperature alternative to conventional powder synthesis techniques in the production of oxide powders. These processes can produce fine, high-purity, stoichiometric particles of single and multi-component metal oxides. Furthermore, if process conditions such as solute concentration, reaction temperature, reaction time and the type of solvent are carefully controlled, the desired shape and size of particles can be produced. Uniform distribution of the particles is key for optimal control of grain size and microstructure in order to maintain high reliability. It has been demonstrated that such powders are composed of much softer agglomerates and sinter much better than those prepared by calcination decomposition of the same oxides. These powders could be sintered at low temperature without calcination and milling steps. The objective of this study was to synthesis TiO2-CeO2 nanosized crystalline particles by a hydrothermal process. TiO2-CeO2 nanosized powders were prepared under high temperature and pressure conditions by precipitation from metal nitrates with aqueous potassium hydroxide. The TiO2-CeO2 nanosized powder was obtained at 185 degrees C and 6 h. The average size and size distribution of the synthesized particles were below 10 +/- 5 nm and narrow, respectively. The XRD diffraction pattern shows that the synthesized particles were crystalline. This study has shown that the synthesis of TiO2-CeO2 nanosized crystalline particles is possible under hydrothermal conditions in aqueous solution.
机译：水热工艺具有直接制备结晶陶瓷粉末的潜力，并为氧化物粉末生产中的常规粉末合成技术提供了低温替代品。这些方法可以产生单组分和多组分金属氧化物的精细，高纯度，化学计量的颗粒。此外，如果小心地控制诸如溶质浓度，反应温度，反应时间和溶剂类型的工艺条件，则可以产生所需的颗粒形状和尺寸。颗粒的均匀分布是最佳控制晶粒尺寸和微观结构以保持高可靠性的关键。已经证明，这种粉末由柔软得多的附聚物组成，并且比通过煅烧分解相同氧化物而制备的那些更好地烧结。这些粉末可以在没有烧结和研磨步骤的情况下在低温下烧结。这项研究的目的是通过水热法合成TiO2-CeO2纳米晶体颗粒。 TiO2-CeO2纳米粉末是在高温和高压条件下通过用氢氧化钾水溶液从金属硝酸盐中沉淀制备的。 TiO2-CeO2纳米粉末是在185摄氏度和6小时的条件下获得的。合成颗粒的平均尺寸和尺寸分布分别低于10 +/- 5nm和窄。 XRD衍射图表明合成的颗粒是结晶的。这项研究表明，在水溶液中水热条件下，可以合成TiO2-CeO2纳米级晶体颗粒。

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