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.
出处
《河北师范大学学报（自然科学版）》
CAS
北大核心
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)
