CAJ | 학술논문

采用水热法，以氯化亚铈（III）、硝酸亚铈（III）为铈源，合成了CeO2纳米立方体和CeO2中空球。采用X射线衍射（XRD）、扫描电子恩微镜（SEM）和透射电子显微镜（TEM）对合成的样品进行物相和结构分析。同时，实验还研究了水热反应条件对产物形貌和粒度分布的影响。结果表明，氯化亚铈（III）直接水热反应，在不同的温度、时间条件下，均可得到立方CeO2粉体，粉体颗粒的粒径在10~50nm，且随着时间的延长其晶粒变大，结晶完善。当采用硝酸亚铈（III）为铈源时，可得到纳米CeO2中空球。其粒径在300~350nm，球壁是由大量纳米CeOz颗粒片组装而成，其厚度为80～120nm。并对纳米CeO2中空球的形成机理进行了初步的探讨。
채용수열법，이록화아시（III）、초산아시（III）위시원，합성료CeO2납미립방체화CeO2중공구。채용X사선연사（XRD）、소묘전자은미경（SEM）화투사전자현미경（TEM）대합성적양품진행물상화결구분석。동시，실험환연구료수열반응조건대산물형모화립도분포적영향。결과표명，록화아시（III）직접수열반응，재불동적온도、시간조건하，균가득도립방CeO2분체，분체과립적립경재10~50nm，차수착시간적연장기정립변대，결정완선。당채용초산아시（III）위시원시，가득도납미CeO2중공구。기립경재300~350nm，구벽시유대량납미CeOz과립편조장이성，기후도위80～120nm。병대납미CeO2중공구적형성궤리진행료초보적탐토。
CeO2 nanopartieles with different morphologies includes cube and hollow sphere have been successfully synthesized via a simple hydrothermal process with CeCl3 and Ce (NO3)3 as the Cerium source. The effects of hydrothermal reaction conditions on morphology and size distribution of CeO2 nanopartielcs in the solution and its phase composition and structure characterized by XRD, SEM and TEM were studied. The CeO2 nanopartieles of Cube can be directly synthesized form Cerium(Ⅲ) chloride by the hydrothermal process in reaction solution with different time and temperature. The reaction time played important roles for the reaction system. CeO2 nanopartieles continuously increased large and crystal continued perfect with the extend reaction time. The CeO2 nanopartieles of hollow sphere with the diameters of 300-350 nm possess a thin shell (80-120 nm) composed of loosed packed CeO2 nanopartieles. And preliminary studied on the CcO2 nanopartieles of hollow sphere formation mechanism.