Silica-titania (SiO 2 -TiO 2 ) aerogel beads are synthesized by a single-step sol-gel reaction, followed by supercritical drying. The SiO 2 -TiO 2 aerogel beads consist of nanoparticles, which interconnect to form mesoporous networks. The TiO 2 nanoparticles distributed in the mesoporous networks have anatase phase. The SiO 2 -TiO 2 aerogel beads with large adsorption capacities and high photocatalytic activities can efficiently remove Rhodamine B (RhB) from water. They can be easily recovered from the reaction solution and retain excellent removal capabilities even after several successive adsorption-photodegradation cycles.

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We report the formation of alumina aerogel beads with a modified ball dropping method, in which alumina alcogel beads are formed by extruding alumina sol containing a small amount of polyvinyl alcohol through nozzles into ammonia water.

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