氢钨青铜的微波辅助合成

氢钨青铜是一类光学和电学性能都非常优异的应用前景广阔的材料.快速简便的合成方法对其实际应用具有非常重要的意义.通过微波加热辅助合成了单相的立方相氢钨青铜H0.25WO3,其空间群和晶胞参数分别为Im-3和a=0.767 3(1) nm.样品的微观形貌为均匀的片状颗粒,厚度约50 nm,边长约100～200 nm.该纳米...

Microwave-assisted synthesis of hydrogen tungsten bronze

Hydrogen tungsten bronzes are a class of materials with excellent optical and electrical properties and have a wide application prospect. The rapid and simple synthesis methods are very important to the practical application of hydrogen tungsten bronzes. In this work, the single-phase cubic hydrogen tungsten bronze H_(0.25)WO_3 has been synthesized by microwave-assisted heating method. The space group and lattice parameter are Im-3 and a=0.767 3(1)nm, respectively. The micro-morphology of sample shows the uniform disk-shaped particles with about 50 nm thickness and 100-200 nm length. The W ions possess the mixed valence of +5 and +6 and the obvious absorption peak appears in the near-infrared wavelength range(780-2 500 nm)for nano hydrogen tungsten bronze H_(0.25)WO_3. The near-infrared absorption mechanism of sample should be explained by two ways including polaron transition and localized surface plasmon resonance.