Kwonnam Sohn

Fabrication of Carbon Capsules with Hollow Macroporous Core/Mesoporous Shell Structures**

By Suk Bon Yoon, Kwonnam Sohn, Jeong Yeon Kim,Chae-Ho Shin, Jong-Sung Yu,* and Taeghwan Hyeon*In this report, the fabrication of carbon capsules with hol-low core/mesoporous shell (HCMS) structures will be pre-sented. Various nanoporous carbon materials have been fabri-cated using inorganic templates, including zeolites,

Synthesis and characterization of spherical carbon and polymer capsules with hollow macroporous core and mesoporous shell structures

Abstract The synthesis and characterization of spherical carbon hollow capsules with mesoporous shell (HCMS) structures is reported. Silica spheres with sub-micrometer sized solid cores and mesoporous shell (SCMS) structures were used as templates in the synthesis. The resulting carbon capsules inversely replicated the morphology of the silica template and had uniform pores with a narrow pore size distribution centered at 3 nm. The carbon capsules exhibited a BET surface area of >1000 m 2 /g and a total pore volume of >1.0 cm 3 /g. The diameter of the hollow core and the mesoporous shell thickness of the carbon capsules could easily be controlled using appropriate SCMS silica materials as templates. Using a similar synthetic procedure, hollow poly(divinylbenzene) capsules were also synthesized.

Low-cost and facile synthesis of mesocellular carbon foams.

Mesocellular carbon foam composed of nanometer sized primary particles was synthesized using hydrothermally synthesized MSU-F silica as a template and poly(furfuryl alcohol) as a carbon source.

Synthesis of carbon tubes with mesoporous wall structure using designed silica tubes as templates

Hollow silica tubes with mesoporous wall structure were synthesized through the sol-gel reactions of tetraethoxysilane and n-octadecyltrimethoxysilane (TEOS/C18-TMS) on the surface of ammonium dl-tartrate crystals. Novel hollow carbon tubes with mesoporous walls and rectangular-shaped channels were fabricated using the silica tubes as templates.

Nanostructured Carbon Capsules with Hollow Core/Mesoporous Shell Structure

Carbon capsules with hollow macroporous core/mesoporous shell were synthesized using sacrificial submicrometer-size solid core/mesoporous shell (SCMS) silica spheres as templates. Size of the hollow macroporous core and thickness of the mesoporous shell can be easily controlled by the choice of silica spheres and the amount of TEOS/C18-TMS mixture, respectively.