School of Physics and Materials Science, Anhui University, Hefei 230039, PR China.
Chemistry. 2011 Apr 4;17(15):4323-9. doi: 10.1002/chem.201003068. Epub 2011 Mar 8.
A solvothermal route is adopted to produce mesoporous α-Fe(2)O(3) nanospheres by using polyethylene glycol as soft template and n-butanol/H(2)O as mixed solvent. The mesoporous α-Fe(2)O(3) nanospheres are subjected to calcination at different temperatures, and the specific surface area, pore size, and magnetic properties of the as-prepared nanospheres are investigated. The studies reveal that the pore sizes of the mesoporous α-Fe(2)O(3) nanospheres increase with higher calcination temperature, and high-temperature calcination brings about tightness of the pore wall. Magnetic studies show that aggregation of the small particles raises the Morin transition temperature.
采用溶剂热法，以聚乙二醇为软模板，正丁醇/水为混合溶剂，制备了介孔α-Fe2O3 纳米球。将介孔α-Fe2O3 纳米球在不同温度下煅烧，研究了所制备纳米球的比表面积、孔径和磁性能。研究表明，介孔α-Fe2O3 纳米球的孔径随煅烧温度的升高而增大，高温煅烧导致孔壁变紧。磁性研究表明，小颗粒的聚集提高了 Morin 转变温度。
