The preparation methods of nano tungsten trioxide mainly include the following common methods:
Nano-tungsten trioxide solvothermal method (Solvothermal Method)
Mix tungsten sources such as tungstic acid or ammonium tungstate with appropriate solvents, and react under high temperature and high pressure conditions to form nano-tungsten trioxide particles through heating and pressure control.
Nano tungsten trioxide hydrothermal method (Hydrothermal Method)
The tungsten source such as tungsten acid or ammonium tungstate is reacted with an appropriate solution under high temperature and high pressure conditions to form nano-tungsten trioxide. Hydrothermal methods generally use water as a solvent.
Nano-tungsten trioxide vapor deposition method (Chemical Vapor Deposition, CVD)
Under proper reaction conditions, tungsten and oxygen source substances are introduced into the reaction chamber, and a nanometer tungsten trioxide film is deposited on the substrate through thermal decomposition or oxidation reaction.
Nano-tungsten trioxide sol-gel method (Sol-Gel Method)
The tungsten trioxide gel system is formed by adding appropriate precursors, solvents and surfactants to the sol, and then dried and calcined to prepare nano-tungsten trioxide.
In addition, there are some other preparation methods, such as electrochemical method, laser sintering method, co-precipitation method and so on. Which method to choose depends on the shape, size and application requirements of the desired nano-tungsten trioxide. Different methods will affect the formation process, crystal structure and physical properties of nano-tungsten trioxide.
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