HPO_4^(2-)与H_2PO_4^-在水热法制备CeO_2纳米颗粒过程中的影响(英文)  

Influence of HPO_4^(2-) and H_2PO_4^- in the Preparation of CeO2 Nanoparticles by Hydrothermal Process

作　　者：周长江[1] 王芬[1] 朱建锋[1] 杨彦青[1] 杨艳艳[1] 刘侠侠[1] 

机构地区：[1]陕西科技大学材料科学与工程学院,教育部轻化工助剂化学与技术重点实验室,西安710021

出　　处：《人工晶体学报》2013年第5期880-885,共6页Journal of Synthetic Crystals

基　　金：National Foundation of Natural Science,China(51072109);Scientific and Technological Project of Wenzhou(H20100079,H20100087);Special Project of Shaanxi Provincial Education Department(11JK0810);Graduate Innovation Fund of Shaanxi University of Science and Technology

摘　　要：以Ce(NO3)3.6H2O、Na5P3O10和Na3PO4.12H2O为原料,用水热法在180℃反应60 h分别制备了CeO2纳米八面体和纳米棒,且对Na5P3O10与Na3PO4.12H2O系统同时调节pH=2时180℃反应12 h制备了纳米棒。通过XRD、FE-SEM、TEM等方法对CeO2纳米棒和纳米八面体进行了测试和分析。结果表明,对于Na5P3O10与Na3PO4.12H2O系统,初始时CeO2八面体与纳米棒共存,但随着水热时间的延长,Na5P3O10系统中CeO2八面体成为主要产物,而在Na3PO4.12H2O系统中CeO2纳米棒成为主要产物。Na5P3O10水解产生的HPO2-4是CeO2纳米八面体形成的主要原因,而Na3PO4.12H2O水解产生的H2PO-4是纳米棒形成的主要原因。CeO2 nanooctrahedron and nanorods were synthesized by hydrothermal method at 180 ℃ for 60 h using Ce(NO3)3·6H2O as start material and Na5P3O10 and Na3PO4·12H2O as mineralizer.For both Na5P3O10 and Na3PO4·12H2O systems,nanorods were prepared by adjusting pH value to 2 at 180 ℃ for 12 h.The as-synthesized samples were characterized by X-ray diffraction(XRD),field emission scanning electron microscope(FE-SEM) and transmission electron microscopy(TEM).The SEM and TEM images analysis showed the nanooctahedron and nanorods coexisted in initial time,and the nanooctahedron and nanorods became primary as the time increasing in the Na5P3O10 and Na3PO4·12H2O systems,respectively.The formation and growth of the nanooctrahedron due to HPO2-4 in the hydrolysis of the Na5P3O10,whereas the nanorod due to H2PO-4 in the hydrolysis of Na3PO4·12H2O.Based on analysis,the modules of morphologies evolution of CeO2 nanopartiles at the hydrothermal process are founded.

关 键 词：CEO2 水热 纳米棒 纳米八面体 形貌变化 

分 类 号：O614.33[理学—无机化学] TQ422[理学—化学]