利用SiO2欧泊制备高比表面积三维有序大孔碳

通过自组装的方法制备了面心立方结构的S iO2欧泊,并利用其为模板,分别采用“体积模板”与“表面模板”两条途径,合成了两类不同结构的三维有序大孔碳材料,分析了填充次数对产物形貌结构的影响。通过场发射扫描电子显微镜和氮气等温吸附-脱附分析对所合成的三维有序大孔碳进行了表征。结果表明:两种结构的碳材料都保持了欧泊的三维有序性,并且具有高的比表面积与孔容。这类材料在催化、分离、吸附以及电极等领域有着广阔的应用前景。

Preparation of Three-Dimensionally Ordered Macroporous Carbon with High Specific Surface Area Using SiO2 Opal as Template

SiO_2opal with face-centered cubic structure is fabricated using a self-assembly method.Two different threedimensionally ordered macroporous carbon materials are prepared using SiO_2 opal as a template through "volume templating" and "surface templating" approaches,respectively.The final morphology of the sample can be controlled by the infiltration times.The as-synthesized samples are characterized by field emission scanning electron microscopy and nitrogen adsorption-desorption methods.Results show that these materials inherit the three-dimensionally ordered structure of SiO_2opals and have a high brunauer-emmett-teller(BET) surface area and a large pore volume.These materials have potential applications in catalysis, separation,adsorption,and electrode material fields.