结构化纳米碳纤维催化材料的制备及表征  

Preparation and Characterization of Monolith with a Carbon Nanofiber Washcoat

作　　者：成春春[1] 朱劼[1] 胡刚[1] 李明时[1] 朱建军[1] 

机构地区：[1]江苏工业学院化学化工学院,江苏常州213164

出　　处：《江苏工业学院学报》2008年第4期1-5,共5页Journal of Jiangsu Polytechnic University

基　　金：江苏省高校自然科学基础研究项目资助(07KJB530024);江苏省基础研究计划(自然科学基金)资助项目(BK2007044);江苏省高校自然科学重大基础研究项目资助(05KJA43004)

摘　　要：采用堇青石型蜂窝陶瓷(monolith)为基材,在其表面浸涂二氧化钛,得到含二氧化钛涂层的新型结构化基材,提高了基材的比表面及抗腐蚀性。以甲烷为碳源,在结构化基材表面生长纳米碳纤维(CNF),制备出结构化复合纳米碳纤维催化材料(CNF/TiO2/monolith)。扫描电镜(SEM)和物理吸附仪(BET)表征结果表明,CNF粗细均匀、直径-70 nm,比表面-180 m2/g。并以CNF/TiO2/monolith为载体负载金属钯,制备出结构化纳米碳纤维负载型催化剂(Pd/CNF/TiO2/monolith),其催化加氢活性明显优于成型活性炭负载型Pd催化剂。A novel structured catalytic material with a titania washcoat was prepared by using monolith as substrate material. A titania washcoat was coated on monolith by dipping titania sol. The titania washcoat protected the substrate material from acid corrosion and increased its specific surface area as well. Nickel particles were supported on the titania--coated structured material to decompose methane to grow carbon nanofibers （CNF）. The CNF/TiO2/monolith was characterized by scanning electron microscopy （SEM） and BET. It is shown that the uniform CNF with diameter of around 70 nm was grown on the surface of the structured material. Pd/CNF/TiO2/monolith catalysts were prepared by impregnating palladium chloride and their hydrogenation activities were evaluated by hydrogenation of styrene. It was shown that the hydrogenation activity of the structured carbon nanofiber supported catalyst was significantly higher than that of commercial formed activation carbon supported catalyst.

关 键 词：堇青石 二氧化钛 纳米碳纤维 钯/碳催化剂 

分 类 号：TQ032.41[化学工程]