A method for preparing purple tungsten oxide nanowires, comprising: uniformly compacting and paving tungsten trioxide powder on a substrate with a paving thickness of 0.5-3 mm; under vacuum conditions, heating the tungsten trioxide powder at high temperature 40 to 90 minutes, and then naturally cooled to room temperature to obtain purple tungsten oxide nanowires. Notes on this production method:
(1) The vacuum degree of the vacuum condition is better than 1Pa.
(2) The high-temperature heating of the tungsten trioxide powder specifically includes heating the tungsten trioxide powder for 30 to 60 minutes. After the temperature rises above 900°C, keep the temperature unchanged and continue the high-temperature heating for 20 minutes. ~90min.
(3) After the temperature rises to 900-1100°C, keep the temperature constant.
(4) The substrate is a flat or boat-shaped crucible that can withstand high temperatures, and the material is tungsten.
(5) The purity of the tungsten trioxide powder is greater than or equal to 99.9%.
The advantages of the purple tungsten oxide nanowire production technology are: the process is relatively simple, and the product can be prepared in only one step, and the redundant WO3 powder in the reaction can be calcined repeatedly, saving costs. The purple tungsten oxide nanowires produced by this method have a large specific surface area and an adjustable size, and are more suitable for the fields of optoelectronic devices and electrochemical devices.
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