Hollow spheres, as a new type of material, are characterized by a large internal space and a shell layer with a thickness in the nanoscale range. This special structure has continuously expanded its application scope to many fields such as materials science and dye industry, and can also be used as lightweight structural materials, insulation, sound insulation, and electrical insulation materials. At present, many preparation methods of hollow spheres have been developed, such as template method, adsorption technology, spray pyrolysis method, ultrasonic chemical method, hydrothermal method, chemical induced autorotation method, etc.
Aluminum oxide is a porous and highly dispersed solid material with excellent adsorption performance, surface acidity, and thermal stability. Aluminum oxide has demonstrated unique advantages in catalysis.
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