CAJ | 학술논문

利用γ-氧化铝为模板.精细控制合成了一系列具有不同孔径的中孔碳材料.在优化的条件下,所得的碳材料具有孔径分布窄、比表面积高(>1000 m2·g-1)、孔容大(最高3.82 cm3·g-1)、中孔率高(>99%)的特点,并且孔壁厚度仅有1-2个石墨层.选用了三种不同来源的氧化铝为模板,考察了模板与所得碳材料织构的相关性,并提出用无序模板可控制备碳材料的机理.即在碳包覆氧化铝的复合物前体中,若碳层完整覆盖氧化铝表面并且足够强韧,则所得碳材料可近似复制模板的孔结构,并且碳材料的孔一部分由去除模板所生成,另一部分来源于模板原有的孔.据此模型对所得碳材料的孔容进行了理论计算,其结果有力支持了上述机理.
이용γ-양화려위모판.정세공제합성료일계렬구유불동공경적중공탄재료.재우화적조건하,소득적탄재료구유공경분포착、비표면적고(>1000 m2·g-1)、공용대(최고3.82 cm3·g-1)、중공솔고(>99%)적특점,병차공벽후도부유1-2개석묵층.선용료삼충불동래원적양화려위모판,고찰료모판여소득탄재료직구적상관성,병제출용무서모판가공제비탄재료적궤리.즉재탄포복양화려적복합물전체중,약탄층완정복개양화려표면병차족구강인,칙소득탄재료가근사복제모판적공결구,병차탄재료적공일부분유거제모판소생성,령일부분래원우모판원유적공.거차모형대소득탄재료적공용진행료이론계산,기결과유력지지료상술궤리.
Mesoporous carbon materials with a range of pore sizes were synthesized by a delicately controlled procedure using disordered /-alumina as template and sucrose as carbon source. Under optimized conditions, the carbon materials had narrow pore size distribution, large surface area (>1000 m2·g-1), large pore volume (up to 3.82 cm3·g-1), high mesopore ratio (>99%), and thin pore walls with thickness of 1-2 graphene layers. In the present work, we employed three types of alumina, and investigated the correlation of their texture with that of the resultant carbon materials. A mechanism for the formation of the carbon materials was proposed and tested against experimental data. A carbon sample prepared by this method can approximately duplicate the pore structure of the template, if the carbon layer in the precursor carbon-covered alumina is complete and sufficiently robust. The mesopores of the carbons had two sources, one from the removal of the template particles and the other from the original pores of the template. Calculated pore volumes strongly support the proposed mechanism.