CeO_2/SiO_2粒状除氟剂的制备及其对F^-的吸附性能  

Preparation of Granular CeO_2/SiO_2 and Its Adsorptivity Towards F^-

作　　者：宋宽秀[1] 严玉清[1] 颜秀茹[1] 聂建明[1] 

机构地区：[1]天津大学理学院化学系,天津300072

出　　处：《应用化学》2003年第6期586-589,共4页Chinese Journal of Applied Chemistry

基　　金：天津市自然科学基金资助项目 ( 95 3 60 6811)

摘　　要：以粗孔硅胶为载体负载CeO2 ,通过浸渍法制备了CeO2 /SiO2 粒状除氟剂。采用了DTA TG、XRD、IR等分析方法对所得样品的物理性能进行了表征 ,并研究了该除氟剂的除氟性能。结果表明 ,CeO2 /SiO2 对F-吸附量随焙烧温度的升高而降低 ,吸附等温线服从Freundlich方程。经 4 0 0℃焙烧的粒状样品CeO2 /SiO2 上CeO2Granular CeO 2 /SiO 2 capable of absorbing fluorine regents has been prepared by impregnation method followed by calcination. The samples are characterized by DTA TG, XRD and IR and the F - adsorbi lity measurements. The adsorptivity of CeO 2/SiO 2 towards F - is decreased with increase in calcination temperature in the range of 400 to 800 ℃. The isothermal adsorption of F - on CeO 2 /SiO 2 conforms to Freundlich equation . CeO 2 in CeO 2/SiO 2 sample obtained from calcination at 400 ℃ appeared to be a crystalline.

关 键 词：Ce02/Si02 除氟剂 

分 类 号：O614[理学—无机化学] O647[理学—化学]