【摘要】 在聚乙二醇(PEG-400)存在的条件下,在溶液中FeCl3与NaOH反应所得的沉淀物经抽滤后,在空气中60℃干燥6h后再在不同温度下热处理.所得的各样品用XRD、Mossbauer谱、TEM及FTIR等手段进行了表征.结果表明,沉淀经60℃干燥6h后得到结晶较差的γ-Fe2O3粉体(含少量结晶较好的α-FeOOH).经300℃热处理1h后得长径比约为5的棒形γ-Fe2O3纳米粒子.更多还原

【Abstract】 This paper presented a new method to prepare γ-Fe2O3 nanoparticles. After the reaction of FeCl3 with NaOH in the presence of polyethylene glycol(PEG-400), the precipitate was dried at 60℃ in air and then calcined at different temperatures for 1h. XRD, Mossbauer spectroscope, TEM, FTIR and TG-DTA were used to characterize the obtained samples. The results show that after the precipitate dried at 60℃ for 6h, a poor-crystalline γ-Fe2O3 powder forms, and calcined at 300℃ for 1h, the poor-crystalline powder turns to rod-like γ-Fe2O3 nanoparticles with aspect ratio about 5.更多还原