Hollow Ammonium Metatungstate Spheres are a special form of Ammonium Metatungstate characterized by its hollow internal structure.
Structure and Morphology
Hollow Ammonium Metatungstate Spheres have a spherical appearance and are internally hollow, i.e., one or more cavities exist.
This hollow structure is realized by specific preparation processes, such as the spray-drying method or the template method.
Preparation method
The preparation of hollow ammonium metatungstate spheres usually involves the spray drying method. In this process, a solution of ammonium metatungstate is atomized into fine droplets through a sprayer, and these droplets are rapidly dried under the action of hot air to form spherical particles.
During the drying process, due to the rapid evaporation of water and surface tension, cavities may form inside the particles, resulting in a hollow structure.
Physical Properties
Hollow Ammonium Metatungstate Ball inherits the basic properties of Ammonium Metatungstate, such as white or slightly yellow color, soluble in water and so on.
However, due to its special hollow structure, Hollow Ammonium Metatungstate Balls may have higher specific surface area and lower density, which provides advantages for its application in specific fields.
Application Areas
Hollow ammonium metatungstate spheres have potential applications in the fields of materials science and catalytic chemistry.
For example, it can be used as a carrier for catalysts, utilizing its high specific surface area and hollow structure to enhance catalyst activity and selectivity. In addition, the hollow ammonium metatungstate spheres can be used to prepare functional materials with special structures and properties, such as photocatalytic materials and sensor materials.
Reference value
In the process of preparing hollow ammonium metatungstate spheres by spray-drying method, the destruction temperature interval of [H2W12O40]6-metal clusters with Keggin structure is 417-439 °C.
When the heat treatment temperature is above 600 °C, ammonium metatungstate can be completely decomposed into WO3.
In summary, the hollow ammonium metatungstate sphere is a form of ammonium metatungstate with a hollow structure, which has unique physical properties and wide application prospects. Hollow ammonium metatungstate spheres with different morphologies and properties can be obtained through specific preparation processes to meet the needs of different fields.
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