锰氧化物的制备及其催化氧化性能研究  

Study on the Preparation of Manganese Oxides and Their Catalytic Oxidation Properties

作　　者：李赛[1] 芦佳[1] 吴银素[1] 马子川[1] 

机构地区：[1]河北师范大学化学与材料科学学院,河北石家庄050024

出　　处：《河北师范大学学报（自然科学版）》2012年第2期159-164,191,共7页Journal of Hebei Normal University：Natural Science

基　　金：国家自然科学基金(21147004;20977024);河北师范大学重点科研基金(L2010Z06);河北师范大学学术科技创新项目(CG201135211111)

摘　　要：采用氧化还原沉淀法和水热法等分别制备α-,β-,γ-,δ-MnO2,Mn2O3和Mn3O4.考察了锰氧化物的种类和晶型对邻二甲苯深度催化氧化性能的影响.研究发现,4种晶型MnO2的催化氧化活性顺序为δ-≈α->γ->β-MnO2,α-MnO2可在260℃将邻二甲苯完全分解.通过X射线衍射、扫描电子显微镜和比表面分析仪对催化剂进行了表征.α-,β-,γ-,δ-MnO2,Mn2O3 and Mn3O4 were prepared through redox-precipitation and hydrothermal routes.The influences of manganese oxidesi’s species and crystal forms on their catalytic activities for complete catalytic oxidation of o-xylene were examined.The catalytic activities of MnOx is in the following sequence：δ-≈α-〉γ-〉β-MnO2.The conversion of o-xylene was 100 % at 260 ℃ over α-MnO2.X-ray diffraction,field emission scanning electron microscope and BET measurement were used to characterize the catalysts.

关 键 词：锰氧化物 邻二甲苯 深度催化氧化 α- β- γ- δ-MnO2 

分 类 号：O614.711[理学—无机化学]