Hierarchical Multimodal Mesoporous Carbon Materials with Parallel Macrochannels
Hierarchical Multimodal Mesoporous Carbon Materials with Parallel Macrochannels
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DOI：
10.1021/cm070294o
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发表时间：
2007-05
影响因子：
8.6
通讯作者：
B. Su;A. Vantomme;L. Surahy;R. Pirard;J. Pirard
中科院分区：
文献类型：
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作者：
B. Su;A. Vantomme;L. Surahy;R. Pirard;J. Pirard
利用介孔氧化锆外模板中孔壁的纳米复制，制备了具有层次化结构的多模介大孔碳材料。与氧化锆外模板一样，纯碳材料也具有漏斗状的直大孔道，它们相互平行，垂直于颗粒致密介孔壳层的切线。作为漏斗状形状的结果，每个宏通道具有以300−700 nm为中心的大开口的孔径梯度。大孔道的孔壁和致密的介孔壳是由中孔尺寸分别为3、15−17和25−50 nm的分级介孔系统形成的。宏通道与层次化的中观结构壁和壳相互连接。该催化剂的比表面积为950m2/g，中孔体积为0.44 cm~3/g。不同大孔道的硅酸铝、二氧化钛、氧化Nb等中大孔氧化物的纳米复制的可能性。
Hierarchically structured multimodal meso-macroporous carbon materials have been prepared by using the nanoreplication of the mesoporous walls of a meso-macroporous zirconia exotemplate. Like the zirconia exotemplate, the pure carbon material possesses funnel shaped straight macrochannels, parallel to each other and perpendicular to the tangent of the particles' dense mesoporous shell. As a result of the funnel-like shape, each macrochannel has a pore size gradient with a large opening centered at 300−700 nm. The walls of the macrochannels and the dense mesoporous shells are formed by a hierarchical mesostructured porous system with uniform mesopore sizes centered at 3, 15−17, and 25−50 nm. Macrochannels are interconnected with hierarchically mesostructured walls and shells. A high surface area of 950 m2/g with a mesopore volume of 0.44 cm3/g is obtained. The possibility of the nanoreplication of other meso-macroporous oxides such as aluminosilicates, titania, and niobium oxide with different macrochannel...