Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Sendai, 980-8577, Japan.
Langmuir. 2011 Oct 4;27(19):12172-8. doi: 10.1021/la202513q. Epub 2011 Sep 13.
W(18)O(49) nanorods were synthesized by pyrolyzing (NH(4))(x)WO(3+x/2) nanorods precursors, which were prepared by a hydrothermal reaction using sulfate as a structure-directing agent, in a reductive atmosphere of H(2)(5 vol %)/N(2) at 500 °C for 1 h. W(18)O(49) nanorods showed high transmittance in the visible region as well as excellent shielding properties of NIR lights. A simulated experiment revealed that excellent heat insulating performance can be realized by applying a 70% visible light transparent W(18)O(49) coating on a quartz glass. Meanwhile, the W(18)O(49) nanorods also showed strong absorption of NIR light and instantaneous conversion of photoenergy to heat. In a word, W(18)O(49) nanorods hold interesting optical properties and are a promising material in a wide range of applications.
W(18)O(49)纳米棒是通过在 500°C 下于 H(2)(5 体积%)/N(2)的还原气氛中加热 1 小时，分解(NH(4))(x)WO(3+x/2)纳米棒前体制备的。该前体是通过使用硫酸盐作为结构导向剂的水热反应制备的。W(18)O(49)纳米棒在可见光区域具有高透过率以及优异的近红外光屏蔽性能。模拟实验表明，在石英玻璃上施加 70%可见光透明的 W(18)O(49)涂层，即可实现优异的隔热性能。同时，W(18)O(49)纳米棒对近红外光也有很强的吸收作用，并能将光能瞬间转化为热能。总之，W(18)O(49)纳米棒具有有趣的光学性质，是一种在广泛应用中很有前途的材料。
