室温固相合成法制备纳米Fe_2O_3粒子

Synthesis of Nanoscale Ferric Oxide Via Solid-state Reaction

分别以表面活性剂PEG-400和PEG-600为分散剂,FeSO4.7H2O和Na2CO3室温下发生固相反应,得到纳米氧化铁前驱体FeCO3,热解后即可得到产品.经TG/DTA、IR、XRD对前驱体及其热解产物进行表征,表明前驱体FeCO3极易分解成纳米Fe2O3,550℃热解得到了纯晶相的三方Fe2O3,粒度分别约为48.2 nm,50.7 nm.

FeCO3 which is the precursor of Fe2O3 , was synthesized when FeSO4·7H2O and Na2CO3 reacted in the presence of surfactant PEG -400 or PEG -600 via solid - state reaction at room temperature. Then, Fe2O3 was obtained by thermal decomposition of the precursor. It showed the precursor of Fe2O3 was easily decomposed into nanoscale ferric oxide through the precursor and its product were characterized by TG/DTA, IR, XRD. Pure Fe2O3 was obtained via thermal decomposition of the precursor at 550℃. The average particle diameter of Fe2O3 were about 48.2 nm ,50.7 nm, respectively.