Synthesis of W18O49 Nanorod via Ammonium Tungsten Oxide and Its Interesting Optical Properties
Synthesis of W18O49 Nanorod via Ammonium Tungsten Oxide and Its Interesting Optical Properties
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DOI：
10.1021/la202513q
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发表时间：
2011-10-04
期刊：
影响因子：
3.9
通讯作者：
Sato, Tsugio
中科院分区：
文献类型：
--
作者：
Guo, Chongshen;Yin, Shu;Sato, Tsugio
以硫酸盐为结构导向剂，采用水热法制备了(NH4)(X)WO_3+x/2纳米棒前驱体，在500℃、H_2(5Vol%)/N~(-2)还原气氛中热解1h制得W18O49纳米棒，W18O49纳米棒在可见光区域具有较高的透过率，同时具有良好的近红外光屏蔽性能。模拟实验表明，在石英玻璃上涂覆70%可见光透过率为70%的W18O49涂层可获得良好的隔热性能。同时，W18O49纳米棒还表现出对近红外光的强吸收和光能到热的瞬时转换。总之，W18O49纳米棒具有有趣的光学性质，是一种具有广泛应用前景的材料。
W18O49 nanorods were synthesized by pyrolyzing (NH4)(x)WO3+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 degrees C for 1 h. W18O49 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 W18O49 coating on a quartz glass. Meanwhile, the W18O49 nanorods also showed strong absorption of NIR light and instantaneous conversion of photoenergy to heat. In a word, W18O49 nanorods hold interesting optical properties and are a promising material in a wide range of applications.