欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
以氨水和碳酸铵为沉淀剂，采用氧化-共沉淀法制备了Ce0.65Zr0.25Y0.1O1．95 复合氧化物，并对不同处理温度下制备的样品用热重-差示扫描分析（TG—DSC）、傅里叶变换红外（FT-IR）光谱、X射线衍射（XRD）和表面分析仪（BET）等进行了表征。结果表明，共沉淀法得到的沉淀物同时含有羟基和羧基，随着焙烧温度的升高，分别在100—170℃、250-300℃和420—500℃温度范围内先后发生脱水、脱羟基和脱羧基反应，在此过程中固溶体逐渐形成。提出了由沉淀物转变为Ce0.65Zr0.25Y0.1O1．95复合氧化物的结构转变模型。
英文摘要：
Ce0.65Zr0.25Y0.1O1.95 oxides were prepared by oxidation-coprecipitation method using ammonia and salvolatile as precipitators. The as-prepared samples were thermally treated at different temperatures and characterized by thermogravimetry-differential scanning calorimetry （TG-DSC）, Fourier transform-infrared （FT-IR） spectrometry, X-ray diffraction （XRD）, and specific surface area measurements （BET）. The results showed that the hydroxyl and carboxyl groups coexisted in the precipitate and a perfect solid solution was gradually formed with an increase in calcination temperature. The physisorbed water was lost from 100 to 170℃, hydroxyl groups were removed from 250 to 300℃, and the carboxyl groups were eliminated from 420 to 500℃. A structure model was further proposed to understand the Ce0.65Zr0.25Y0.1O1.95 structure evolution process in depth.
同期刊论文项目
同项目期刊论文
Effect of Cobalt oxide on perfermance of Pd catalysts for lean-burn natural gas vehicles in the pres
期刊信息
位置：