Institute of Multidisciplinary Research for Advanced Materials, Tohoku University , 2-1-1 Katahira, Aoba-ku, Sendai, Japan.
ACS Appl Mater Interfaces. 2011 Jul;3(7):2794-9. doi: 10.1021/am200631e. Epub 2011 Jun 27.
Potassium tungsten oxide nanofibers were successfully synthesized via a facile hydrothermal reaction route in the presence of sulfate. After reduction under a reductive atmosphere of H(2)(5 vol %)/N(2), the potassium tungsten oxide transformed to potassium tungsten bronze. Because of the lack of free electrons, the potassium tungsten oxide (K(x)WO(3+x/2)) showed no NIR shielding performance; however, the potassium tungsten bronze (K(x)WO(3)) showed promising optical characteristics such as high transmittance for visible light, as well as high shielding performance for near-infrared lights, indicating its potential application as a solar filter. Meanwhile, the potassium tungsten bronze (K(x)WO(3)) showed strong absorption of near-infrared light and instantaneous conversion of photoenergy to heat.
通过在硫酸盐存在下的简便水热反应路线成功合成了氧化钨钾纳米纤维。在 H(2)(5 体积%)/N(2)的还原气氛下还原后，氧化钨钾转化为钨青铜钾。由于缺乏自由电子，氧化钨钾(K(x)WO(3+x/2))没有近红外屏蔽性能;然而，钨青铜钾(K(x)WO(3))表现出有前景的光学特性，如可见光的高透过率以及近红外光的高屏蔽性能，表明其作为太阳能滤光片的潜在应用。同时，钨青铜钾(K(x)WO(3))表现出对近红外光的强烈吸收和瞬间将光能转化为热能。
