Pd负载磁性多壁碳纳米管催化对氯苯酚脱氯的研究

Hydrochlorination of 4-chlorophenol over magnetic multi-walled carbon nanotubes support Pd catalyst

以FeCl3和碳纳米管为原料,采用水热合成法合成磁性碳纳米管,以硼氢化钠为还原剂,制备了磁性钯碳纳米管催化剂(Pd/MWCNTs-Fe3O4),用于对氯苯酚催化脱氯,探讨了反应温度、底物浓度以及有机溶剂对催化脱氯反应的影响。结果表明,催化剂循环利用6次以后,其脱氯活性仍可以达到100%,选择性可达80%以上。

The magnetic carbon nanotubes was synthesized by hydrothennal method using FeC13 and multi- walled carbon nanotubes as starting materials. The Pd/MWCNTs-Fe3O4 was prepared by impregnation method employing sodium borohydride as a reducing agent. The catalyst Pd/MWCNTs-Fe3O4 was applied for the aqueous phase hydrochlorination of 4-chlorophenol. Effects of reaction temperature,4-CP concentration and organic solvents were investigated. The results indicate that the catalyst exhibited excellent sta- bility and reusability. The conversion of 4-CP and selectivity to phenol remained at 100% and 80 % re- spectively after the catalyst was reused six times.