One-pot synthesis of PVP-coated Ni_(0.6)Fe_(2.4)O_4 nanocrystals  

作　　者：LU XianYong NIU Mu YANG ChunHui YI LuoXin QIAO RuiRui DU MeiHong GAO MingYuan 

机构地区：[1]Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China [2]School of Chemistry and Environment, Beijing University of Aeronautics and Astronautics, Beijing 100191, China [3]Beijing Center for Physical and Chemical Analysis, Beijing 100089, China

出　　处：《Chinese Science Bulletin》2010年第30期3472-3478,共7页

基　　金：supported by the National Natural Science Foundation of China (20640430564 and 20820102035);the Knowledge Innovation Program of the Chinese Academy of Sciences (KJCX2-YW-M15);the Ministry of Health (2008ZX10001-014)

摘　　要：Novel poly(N-vinyl-2-pyrrolidone) (PVP)-coated nickel ferrite nanocrystals were prepared by simultaneously pyrolyzing nickel(Ⅱ) acetylacetonate (Ni(acac)2) and iron(Ⅲ) acetylacetonate (Fe(acac)3) in N-vinyl-2-pyrrolidone (NVP). The PVP coating was formed in situ through polymerization of NVP. The crystalline structure of the resultant nickel ferrite was analyzed by high-resolution transmission electron microscopy,electron diffraction patterns,and powder X-ray diffraction. In addition,the valence state of Ni and the metal contents of Ni and Fe in different valence states were analyzed by X-ray photoelectron spectroscopy (XPS),atomic absorption and the phenanthroline method. The surface coating layer of PVP and its binding states were characterized by Fourier transform infrared spectroscopy in combination with XPS. Colloidal stability experiments revealed that the nanocrystals could be dispersed well in both phosphate-buffered saline and Dulbecco's Modified Eagle Medium.Novel poly（N-vinyl-2-pyrrolidone） （PVP）-coated nickel ferrite nanocrystals were prepared by simultaneously pyrolyzing nickel（H） acetylacetonate （Ni（acac）2） and iron（Ⅲ） acetylacetonate （Fe（acac）3） in N-vinyl-2-pyrrolidone （NVP）. The PVP coating was formed in situ through polymerization of NVP. The crystalline structure of the resultant nickel ferrite was analyzed by high-resolution transmission electron microscopy, electron diffraction patterns, and powder X-ray diffraction. In addition, the valence state of Ni and the metal contents of Ni and Fe in different valence states were analyzed by X-ray photoelectron spectros- copy （XPS）, atomic absorption and the phenanthroline method. The surface coating layer of PVP and its binding states were characterized by Fourier transform infrared spectroscopy in combination with XPS. Colloidal stability experiments revealed that the nanocrystals could be dispersed well in both phosphate-buffered saline and Dulbecco＇s Modified Eagle Medium.

关 键 词：聚乙烯吡咯烷酮 高分辨透射电子显微镜 纳米涂层 X射线光电子能谱 粉末X射线衍射 傅里叶变换红外光谱 镍铁氧体 合成 

分 类 号：O484.1[理学—固体物理] TQ326.6[理学—物理]