催化学报

催化学报 ›› 2009, Vol. 30 ›› Issue (3): 259-264.

• 研究论文 • 上一篇    下一篇

碳纳米管负载Pd/SnO2催化剂的制备及其催化邻氯硝基苯加氢性能

王闯, 邱介山, 梁长海   

  1. 大连理工大学化工学院精细化工国家重点实验室炭素材料研究室, 辽宁大连116012
  • 收稿日期:2009-03-25 出版日期:2009-03-25 发布日期:2012-12-19

Synthesis of Carbon Nanotubes-Supported Pd/SnO2 for the Hydrogenation of ortho-Chloronitrobenzene

WANG Chuang, QIU Jieshan*, LIANG Changhai   

  1. Carbon Research Laboratory, State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116012, Liaoning, China
  • Received:2009-03-25 Online:2009-03-25 Published:2012-12-19

PDF

1030

被引次数

18

摘要： 采用化学还原法制备了不同Sn/Pd摩尔比的碳纳米管(CNTs)负载Pd/SnO2催化剂, 并将该催化剂用于邻氯硝基苯(o-CNB)的选择加氢反应. 采用透射电镜、X射线衍射和电感耦合等离子体技术对所制备的Pd/SnO2/CNTs催化剂进行了表征. 结果表明, Sn/Pd摩尔比对该催化剂的邻氯硝基苯选择加氢反应性能影响显著. 当Sn/Pd摩尔比为11时, 催化剂的活性最高, 在常压, 60 oC反应60 min, o-CNB转化率为96%. 该催化剂还具有高的邻氯苯胺(o-CAN)选择性, o-CNB转化率达到100%时, 脱氯副产物苯胺选择性小于5%. 在相同条件下，浸渍法制备的2.4%Pd/CNTs催化剂上脱氯副反应严重, 当o-CNB完全转化时, o-CAN选择性只有22%, 副产物苯胺选择性则高达78%.

关键词: 碳纳米管, 钯, 二氧化锡, 邻氯硝基苯, 选择加氢, 邻氯苯胺

Abstract: A new method was developed for the synthesis of Pd/SnO2/CNTs nano-catalysts, in which three steps are involved: the adsorption of Sn2+ on the surface of CNTs, the addition and reduction of Pd2+ by Sn2+, and the formation of SnO2 due to the hydrolyzation of Sn4+. The as-obtained Pd/SnO2/CNTs catalysts show high ortho-chloroaniline selectivity in the hydrogenation of chloronitrobenzene.

Key words: carbon nanotube, palladium, tin dioxide, chloronitrobenzene, selective hydrogenation, chloroaniline