球形花状多孔碳材料制备及应用  

Preparation and Application of Spherical Flower-like Porous Carbon Material

作　　者：刘亚东 白广梅 邱文革 LIU Ya-dong;BAI Guang-mei;QIU Wen-ge(College of Materials Science and Engineering,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学材料科学与工程学院,北京100124

出　　处：《化学试剂》2025年第1期39-44,共6页Chemical Reagents

基　　金：面向多氮杂笼形底物的氢解脱苄催化剂结构调控及失活机理研究项目(22075005)。

摘　　要：采用老化处理与水热碳化结合的策略,以葡萄糖为碳源,成功制备了球形花状多孔碳材料,相应Pd(OH)_(2)/C催化剂在笼形底物的氢解脱苄反应中显示出优异的催化活性。具体研究了MgCl_(2)/Na_(2)CO_(3)物质的量比、葡萄糖浓度和老化处理对碳材料形貌的影响,确定了球形花状多孔碳材料的较佳制备条件。通过扫描电镜、粉末X射线衍射和氮气吸/脱附测试表征了原位自生模板剂和多孔碳材料的形貌、晶相结构及比表面积和孔径分布。发现将MgCl_(2)和Na_(2)CO_(3)在常温下混合,首先生成的是棒状碳酸镁,经过80℃老化处理后,转变为球形花状碱式碳酸镁,它是葡萄糖水热碳化的模板剂。Porous carbon material with a spherical,flower-like structure was successfully synthesized using a combination approach involving aging treatment and hydrothermal carbonization,with glucose serving as the carbon source.The corresponding Pd(OH)2/C catalyst showed high activity in the hydrogenolytic debenzylation of a cage substrate.The effects of the material ratio of MgCl_(2)/Na_(2)CO_(3),glucose concentration,and aging treatment on the morphology of porous carbon material were studied,and the optimum preparation conditions were determined.The morphology,crystalline structure,specific surface area,and pore size distribution of the resulting porous carbon material were characterized by scanning electron microscope(SEM),X-ray diffraction(XRD),and nitrogen adsorption and desorption test.It was found that rod-shaped magnesium carbonate formed firstly when MgCl_(2) and Na_(2)CO_(3) were mixed at room temperature,which transformed to spherical flower-like basic magnesium carbonate after aging treatment at 80℃,templating the glucose hydrothermal carbonization.

关 键 词：多孔碳材料 水热合成 原位自生模板法 老化处理 氢解脱苄 

分 类 号：TQ152[化学工程—电化学工业]