The acid solution method of tungsten trioxide is a method of preparing tungsten trioxide, which uses the tungsten source in the acidic solution to oxidize it to tungsten trioxide through proper treatment and conditions. The following are the general steps of the tungstic acid solution method:
Preparation of tungsten trioxide step 1 by acid solution method
Prepare tungstic acid solution. Dissolve an appropriate amount of tungstic acid or tungstate (such as sodium tungstate) in an appropriate acidic solution, commonly used acidic solutions include nitric acid (HNO3), hydrochloric acid (HCl) or sulfuric acid (H2SO4). The concentration and pH of the acidic solution can be adjusted to control the course of the reaction and the properties of the resulting product.
Preparation of tungsten trioxide by acid solution method step 2
The reaction solution was heated. Heat the tungstic acid solution to an appropriate temperature, usually in the range of 50-100 degrees Celsius. Heating can promote the oxidation reaction and increase the reaction rate.
Preparation of tungsten trioxide by acid solution method step 3
Continue stirring and reaction time. While heating, the solution is continuously stirred to maintain uniform reaction conditions and improve reaction efficiency. The reaction time can be regulated as needed, usually in the range of several hours to tens of hours.
Preparation of tungsten trioxide by acid solution method step 4
The precipitate was separated and washed. After the reaction is completed, the tungsten trioxide precipitate is separated from the solution by centrifugation or filtration. The precipitate is then washed with a suitable solvent such as water or an acid solution to remove residual impurities and by-products in solution.
Preparation of tungsten trioxide step 5 by acid solution method
Drying and heat treatment. The washed tungsten trioxide precipitate can be dried by natural air drying or heat drying. If necessary, the dried precipitate can also be heat-treated to further improve its crystal structure and properties. Specific preparation conditions and operating details may vary between laboratories or researchers. Therefore, in actual operation, it needs to be optimized and adjusted according to specific needs and experimental conditions.
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