Synthesis of millimeter-scale Al2O3 ceramic hollow spheres by an improved emulsion microencapsulation method

Scalable Preparation of Sub-Millimeter Double-Shelled Al2O3 Hollow Spheres and Their Rapid Separation from Wastewater after Adsorption of Congo Red

“…In order to study the effect of nitric acid treatment of pseudoboehmite powders on mechanical properties of ceramic spheres, solid spheres were used instead of the PDSs as the research object to eliminate experimental errors caused by small diameters and thin shell of the PDSs . The compressive strength of solid ceramic spheres obtained by rolling ceramic powders for 8 min and sintering is shown in Figure .…”

“…The hard-templating methods usually utilize “rigid” materials such as carbon spheres, SiO 2 spheres, gelatin spheres, and so on as templates to prepare Co 3 O 4 @CdS, Co 3 O 4 Ce 1– x Zr x O 2 , and RuO 2 hollow spheres. The soft template methods typically involve the formation of relatively flexible structures, such as emulsion droplets, supramolecular micelles, , and vesicles as templates. Huo et al obtained hollow silica mesoporous spheres with an average diameter around 310 nm using cetyltrimethylammonium bromide vesicles as the template .…”

Spherical core–shell alumina support particles for model platinum catalysts

“…[69][70][71] Sol-gel chemistry has also been applied for the synthesis of hollow spheres. 72,73 In another procedure, hollow alumina spheres and solid spheres were synthesized with water-in-oil-in-water (W/O/W) emulsions. 74 In a synthesis stemming from Al(NO 3 ) 3 in water/acetone solution, by adjusting the reaction time, the properties of the obtained alumina spheres were tunable from a uniform solid to coreshell and hollow structures.…”

Creation of gallium acid and platinum metal sites in bifunctional zeolite hydroisomerization and hydrocracking catalysts by atomic layer deposition

“…[69][70][71] Sol-gel chemistry has also been applied for synthesis of hollow spheres. 72,73 In another procedure, hollow alumina spheres and solid spheres were synthesized with water in oil in water (W/O/W) emulsions. 74 In a synthesis stemming from Al(NO3)3 in water/acetone solution, by adjusting the reaction time, the properties of the obtained alumina spheres were tunable from a uniform solid to coreshell and hollow.…”