Producing Dimensional Network Structure Tungsten Trioxide

Tungsten trioxide (WO3) because of its unique nature has been widely applied in all aspects of industry and technology. Besides the morphology and structure of WO3 has a direct relationship with applications, now, people have many ways to prepare different pore size of the porous oxide, including large hole, mesoporous and microporous. But the porous foam structure material for fragile so little research and application.

After the expert study, they can produce tungsten trioxide dimensional network structure having a supporting force. Typical synthetic methods for producing tungsten trioxide dimensional network structure are as follows:
(1) 1g metal tungsten powder dissolved in mixed liquor which includes 15ml30% H2O2 and 15ml methanol. In this process to keep stirring then make it to form a clear solution.
(2) Put 0.12g polyvinyl pyrrolidone into clear solution which made from pervious task to form a transparent slightly viscous solution.
(3) The solution was concentrated under 333K, when the solution was concentrated to 5ml, foam-like structure of WO3 is begin to form.
(4) Calcining the foam-like structure at 773K for 6 hours, at a heating rate control at 1K / min.   

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