The Method For Tungsten Trioxide Nanosheet

Brief description of this technology:  
The present invention includes  a tungsten trioxide (WO ↓ [3]) nanosheet and  the method for tungsten trioxide nanosheet. The characteristics of tungsten trioxide (WO ↓ [3]) nanosheet in that  the tungsten trioxide (WO ↓ [3])  is monocrystalline monoclinic phase (JCPDS # 43-1035) and it  is fluffy floc,.The area of it is (100-800) nm × (100-800) nm, the thickness of    the apparent is  5-40nm, and the surface area of BET is up to 100 250 m ↑ [2] / g.  The preparation method: tungsten acid the base organic or inorganic layered hybrid micro / nanobelts (tube) for precursor oxidation by nitric acid to remove the organic precursor layer tungstate (WO ↓ [3] • H ↓ [2] O) nanosheet. The reaction temperature is about 15-50 ° C;  the reaction time is about  5-120h.The  resulting tungstic acid (WO ↓ [3] • H ↓ [2] O) nanosheet to 1-5 ° C / min. The heating rate was raised to 250-600 ° C, and then incubated for 1-5h, and finally natural cooling to room temperature and stripped of water of crystallization, and the tungsten trioxide nanosheet.


The  present invention has the simple  production process   and the scope of changes in operating parameters is changeable. This invention is also adaptable and has low equipment requirements,high repeatability, high efficiency and low cost.




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