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首页> 外文期刊>RSC Advances >Solid-state-reaction synthesis of VO2 nanoparticles with low phase transition temperature, enhanced chemical stability and excellent thermochromic properties
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Solid-state-reaction synthesis of VO2 nanoparticles with low phase transition temperature, enhanced chemical stability and excellent thermochromic properties

机译：具有低相变温度，增强的化学稳定性和出色的热致变色特性的VO2纳米颗粒的固相反应合成

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The synthesis of VO2 has been a fundamental topic in the study of VO2-based materials for energy-saving applications. Methods including hydrothermal, sol-gel and chemical vapor deposition can be used to synthesize VO2 (M1/R). However, these techniques may usually involve some problems such as expensive raw materials, complex steps, and difficulties in controlling appropriate ratios of precursor amounts. In this study, a solid-state-reaction route was developed to prepare well-crystallized VO2 (M1/R) nanoparticles with low, variable phase transition temperature, enhanced chemical stability and excellent thermochromic properties. The phase transition temperatures ranged from 43.5 degrees C to 59.3 degrees C by regulating reaction conditions, and it could be inferred from the study of the preparation process that the amorphous phases around the crystalline VO2 phases played an important role in the decrease of phase transition temperatures compared with the reported values for bulk VO2 (68 degrees C). Moreover, the obtained VO2 (M1/R) nanoparticles exhibited enhanced anti-oxidation and acid-resistance abilities compared with particles prepared by hydrothermal process, and the derived flexible foils on polymer from the prepared VO2 (M1/R) nanoparticles showed excellent thermochromic properties (T-lum = 54.2%, Delta T-sol = 9.2%).
机译：VO2的合成一直是用于节能应用的基于VO2的材料研究的基本主题。可以使用水热法，溶胶-凝胶法和化学气相沉积法等方法合成VO2（M1 / R）。然而，这些技术通常可能涉及一些问题，例如昂贵的原料，复杂的步骤以及难以控制适当的前体量比例。在这项研究中，固态反应路线被开发以制备具有低的，可变的相变温度，增强的化学稳定性和优异的热致变色性质的结晶良好的VO 2（M1 / R）纳米颗粒。通过调节反应条件，相变温度在43.5℃至59.3℃之间，从制备过程的研究中可以推断出，结晶VO2相周围的非晶相在降低相变温度中起着重要作用。与大量VO2（68摄氏度）的报告值进行比较。此外，与通过水热法制备的颗粒相比，所获得的VO2（M1 / R）纳米颗粒表现出增强的抗氧化和耐酸能力，并且由所制备的VO2（M1 / R）纳米颗粒在聚合物上衍生的柔性箔表现出优异的热致变色性能。 （T-lum ＝ 54.2％，ΔT-sol＝ 9.2％）。

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