White tungsten oxide is a kind of tungsten oxide variant with specific chemical composition and properties, and the following is the detailed explanation about white tungsten oxide:
- Basic Information
Chemical formula
The chemical formula of white tungsten oxide is usually denoted as WO3, but in some cases, it may also exist in the form of non-integer-ratio oxides, such as W18O49, and these non-integer-ratio oxides may appear white under certain conditions.
Color
White tungsten oxide is white or nearly white in color.
Morphology
White tungsten oxide is usually a white amorphous powder with specific crystal structure and surface state.
- Properties
Stability
White tungsten oxide has high thermal and chemical stability and can remain unchanged in air for a long time.
Optical properties
As a semiconductor material, white tungsten oxide has certain photoelectric properties, which makes it potentially useful in the field of optoelectronics.
Solubility
White tungsten oxide is insoluble in water and inorganic acids except hydrofluoric acid, but soluble in alkaline solution.
Preparation Methods
There are various methods to prepare white tungsten oxide, including chemical method, physical method and biological method. Among them, chemical method is one of the most commonly used methods, which is prepared through chemical processes such as redox reaction of tungsten or reduction reaction of sodium tungstate.
Specific preparation conditions (e.g., temperature, time, concentration of reactants, etc.) have an important effect on the color, purity, and properties of the final product. For example, in the solvothermal method, anhydrous n-butanol is used as the solvent, and by controlling the temperature and time of the reaction, white W18O49 can be prepared.
- Application fields
Catalytic field
White tungsten oxide plays an important role as a catalyst in many kinds of catalytic reactions, such as oxidation reaction, reduction reaction and redox reaction.
Electronic materials
Due to its semiconductor property, white tungsten oxide can be used to prepare electronic materials such as metal oxide semiconductor materials and high temperature thermoelectric materials.
Ceramic Materials
White tungsten oxide also plays an important role in the preparation of ceramic materials and can enhance the performance of ceramic materials.
- Precautions
In practical application, the performance and effect of white tungsten oxide may be affected by a variety of factors, such as purity, crystal structure, surface state and so on. Therefore, when selecting and using white tungsten oxide, comprehensive consideration needs to be made according to specific needs and application scenarios.
White tungsten oxide is a white amorphous powdery tungsten oxide variant with high thermal stability, chemical stability and optoelectronic properties, which has a wide range of applications in the fields of catalysis, electronics and ceramics.
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