微晶态-αMnO_2的界面合成及其催化性能

Interface Synthesis and Catalytic Property of Microcrystal α-MnO_2

以KMnO4和KOH的混合溶液及Mn(NO3)2溶液为原料,采用CCl4/H2O界面法,通过改变锰盐、碱溶液、陈化时间及焙烧温度等条件,制备了系列MnOx催化剂.以邻二甲苯的分解率和二氧化碳产率综合评价了上述催化剂的活性,XRD,BET及SEM测试结果显示,陈化24 h及焙烧400℃条件下得到的催化剂为微晶态-αMnO2纳米颗粒,其比表面积为28.962 m2/g.

A series of MnOx catalysts were prepared by CCl4/H2O interface method using KMnO4,KOH and Mn（NO3）2 solution as precursors.The prepared conditions such as manganese salt,alkali solution,aged time and calcination temperature were changed.Catalytic activities of the catalysts were evaluated in terms of both o-xylene conversion and CO2 yield.XRD,BET and SEM characterizationg results showed the catalyst were prepared at the aged time 24 h and calcination temperature 400 ℃ was microcrystal α-MnO2 nanoparticle.Its specific surface area was 28.962 m2/g.