化学通报（印刷版）
化學通報（印刷版）
화학통보（인쇄판）
CHEMISTRY
2010年
4期
377-380
,共4页
张宏玉%刘峰奎%金环年%刘东%阙国和
張宏玉%劉峰奎%金環年%劉東%闕國和
장굉옥%류봉규%금배년%류동%궐국화
乙酰丙酮铁%α-铁铁纳米粒子%氢气%热分解%超顺磁性
乙酰丙酮鐵%α-鐵鐵納米粒子%氫氣%熱分解%超順磁性
을선병동철%α-철철납미입자%경기%열분해%초순자성
Ferric acetylacetonate%Iron nanoparticle%Hydrogen%Thermal decomposition%Superparamagnetism
以低沸点溶剂正庚烷作为反应介质,三辛基膦和辛胺为稳定剂,在高压釜反应器中高压临氢条件下热分解还原乙酰丙酮铁,制备单质铁纳米粒子.X射线粉末衍射数据表明产物为纯净的单质α-铁,电子衍射结果进一步证明了这一结论;透射电镜图像(TEM)显示,所得产物为平均粒径11.5nm的类球型纳米粒子;从高分辨透射电镜图像(HRTEM)观察到体心结构α-铁的超晶格,表明制备的铁纳米粒子具有较好的结晶度;利用交变梯度磁强计测定了纳米粒子的磁学性质,结果表明纳米粒子具有超顺磁性,比饱和磁化强度为121emu/g.
以低沸點溶劑正庚烷作為反應介質,三辛基膦和辛胺為穩定劑,在高壓釜反應器中高壓臨氫條件下熱分解還原乙酰丙酮鐵,製備單質鐵納米粒子.X射線粉末衍射數據錶明產物為純淨的單質α-鐵,電子衍射結果進一步證明瞭這一結論;透射電鏡圖像(TEM)顯示,所得產物為平均粒徑11.5nm的類毬型納米粒子;從高分辨透射電鏡圖像(HRTEM)觀察到體心結構α-鐵的超晶格,錶明製備的鐵納米粒子具有較好的結晶度;利用交變梯度磁彊計測定瞭納米粒子的磁學性質,結果錶明納米粒子具有超順磁性,比飽和磁化彊度為121emu/g.
이저비점용제정경완작위반응개질,삼신기련화신알위은정제,재고압부반응기중고압림경조건하열분해환원을선병동철,제비단질철납미입자.X사선분말연사수거표명산물위순정적단질α-철,전자연사결과진일보증명료저일결론;투사전경도상(TEM)현시,소득산물위평균립경11.5nm적류구형납미입자;종고분변투사전경도상(HRTEM)관찰도체심결구α-철적초정격,표명제비적철납미입자구유교호적결정도;이용교변제도자강계측정료납미입자적자학성질,결과표명납미입자구유초순자성,비포화자화강도위121emu/g.
Pure iron nanoparticles were prepared by thermal-decomposition of Fe(acac)_3 in autoclave under high pressure hydrogen atmosphere with n-heptane as solvent and trioctylphosphine (TOP) and octylamine (OA) as stabilizer.The XRD and electron diffraction patterns demonstrated that the prepared sample was consisted of pure α-iron.The image of TEM indicated that the sample was uniform nanoparticles with an average diameter of 11.5 nm and the image of HRTEM showed the clear superlattice of bcc-Fe with perfect degree of crystallinity.The results of AGM indicated that the Fe nanocrystal was of superparamagnetism and the saturation magnetization of the product is about 121emu/g.
