科研之友
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摘要
A series of large-pore mesoporous carbon materials with a three-dimensional wormhole framework structure were synthesized by nanocasting using mesoporous silica as a hard template. Samples of hard-template mesoporous silica with pore diameters from 3.08 to 6.43 nm, pore volumes from 0.59 to 1.02 cm(3) g(-1) and surface areas from 832 to 579 m(2) g(-1) were prepared from tetraethyl orthosilicate as the silica source and ionic liquid 1-butyl-3-methylimidazolium bromide as structure-directing agent through hydrothermal treatment at different temperatures (110-150 degrees C) followed by calcining at 550 degrees C. Subsequently, carbon materials with large pore diameters (2.76-6.70 nm), pore volumes (0.74-2.10 cm(3) g(-1)) and high surface areas (1074-1276 m(2) g(-1)) were synthesized using the various mesoporous silicas synthesized at the different hydrothermal temperatures as a hard-template. The carbon material obtained at a hydrothermal temperature of 150 degrees C possesses outstanding adsorbility for amaranth and methylene blue dyes.
