Nanomolybdenum oxide usually refers to nanoscale tungsten trioxide (WO3), and it is also commonly known as nanoscale tungsten oxide (VI) or tungsten anhydride. Below is a detailed explanation of nanomolybdenum oxide:
Basic Properties of Nanomolybdenum Oxide
Chemical Formula: WO3
Appearance: Yellow powder
Solubility: Insoluble in water, soluble in alkali, and slightly soluble in acid. Specifically, it is almost insoluble in any inorganic acid except for hydrofluoric acid (HF).
Structure: The structure of tungsten trioxide changes with temperature; for example, it is tetragonal above 740°C and orthorhombic between 330-740°C.
Preparation Methods of Nanomolybdenum Oxide
Nanomolybdenum oxide (nanotungsten trioxide) can be prepared using various methods, with hydrothermal synthesis being a common approach. This method can produce nanoscale tungsten trioxide with small particle sizes and high purity.
Application Areas of Nanomolybdenum Oxide
Due to its unique physical and chemical properties, nanomolybdenum oxide has a wide range of applications in several fields:
- Photocatalytic and Gas-Sensitive Materials: Nanotungsten trioxide has strong absorption capabilities for electromagnetic waves and can be used as a photocatalyst and gas-sensitive material.
- Solar Energy Materials: It serves as an excellent solar energy-absorbing material, helping to improve solar energy conversion efficiency.
- Pigments and Coatings: In the pigment and coating industry, nanotungsten trioxide can be used as an additive in pigments, oil paints, and watercolors.
- Catalysts: In the petrochemical industry, nanotungsten trioxide is commonly used as a catalyst or co-catalyst in reactions such as hydrogenation, dehydrogenation, oxidation, hydrocarbon isomerization, and alkylation.
- Other Applications: It can also be used for X-ray shielding, fire-resistant fabrics, and tungsten-modified materials.
Technical Specifications of Nanomolybdenum Oxide
The technical specifications of nanomolybdenum oxide may vary depending on production methods and application requirements. Below are some possible technical indicators:
- Particle Size: Common particle sizes of nanotungsten trioxide include 20 nm, 50 nm, 100 nm, etc.
- Purity: The purity of WO3 usually reaches 99.9% or higher.
- Specific Surface Area: Nanotungsten trioxide has a large specific surface area, which enhances its catalytic and other surface effects.
- Loss on Ignition: This is used to measure the stability of the material at high temperatures, with lower values typically required.
In summary, nanomolybdenum oxide is a nanomaterial with a variety of excellent properties and application prospects. With the continuous development of nanotechnology, its application fields and performance optimization will continue to expand and improve.
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