Article

Synthesis of W18O49 nanorod via ammonium tungsten oxide and its interesting optical properties.

Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Sendai, 980-8577, Japan.
Langmuir (impact factor: 4.19). 08/2011; 27(19):12172-8. DOI:10.1021/la202513q pp.12172-8
Source: PubMed

ABSTRACT 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.

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Keywords

applying
 
hydrothermal reaction
 
instantaneous conversion
 
interesting optical properties
 
NIR lights
 
promising material
 
reductive atmosphere
 
strong absorption
 
structure-directing agent
 
sulfate
 
visible region
 
wide range
 

Chongshen Guo