油酸表面修饰的Ce_2O_3纳米微粒的制备和钝钒研究

PREPARATION AND VANADIUM PASSIVATION EFFECT OF SURFACE MODIFIED Ce_2O_3 NANOPARTICLES

以硝酸铈为原料 ,在水 乙醇混合溶剂中制备出油酸修饰的Ce2 O3纳米微粒 ,并用FT IR、TEM对其进行了表征。结果表明 :油酸修饰Ce2 O3纳米微粒在四氢呋喃、石油醚、氯仿、苯和甲苯等有机溶剂中具有良好的分散性 ,说明油酸修饰的Ce2 O3纳米微粒表面存在疏水有机基团 ,修饰剂油酸与Ce2 O3纳米核之间存在着化学键合作用。用Ce2 O3纳米微粒浸渍钒中毒催化裂化催化剂进行实验 ,结果表明 ,可使其比表面积。

Olelic acid surface modified Ce 2O 3 nanoparticles were prepared in the water alcohol solvent.Such Ce 2O 3 nanoparticles were analyzed by means of various characterization approaches,including TEM and FT IR.It was found that the olelic acid modified Ce 2O 3 nanoparticles can be well dispersed in such organic solvents as tetrahydrofuran,petroleum ether,trichloromethane,benzene and toluene.The dispersancy test showed that some hydrophobic groups exist at the surface of olelic acid modified Ce 2O 3 nanoparticles and olelic acid chemically bonds Ce 2O 3 nanonuclear with each other.By impregnation of Ce 2O 3 nanoparticles on vanadium contaminated FCC catalyst,the specific surface area,pore volume and microactivity of the catalyst can be restored partially.