以δ-FeOOH为晶种由铁低温液相制备纳米氧化铁红

Preparation of nano-sized iron oxide red using δ-FeOOH as seed and iron as raw material in liquid phase at low temperature

引言纳米氧化铁红,具有良好的耐候性、耐光性、催化活性和化学稳定性,在光气敏材料、精细陶瓷、涂料、催化剂和生物医学工程等方面有广泛的应用价值和开发前景[1-3]。目前制备纳米氧化铁有很多种方法。

Uniform pseudocube nano-iron oxide red （hematite） particles was prepared in the liquid phase by using δ-FeOOH as seed and iron as raw material at low temperature. The effects of such factors as initial pH of reaction, concentration of catalyst, reaction time on the preparation of these hematite particles were investigated. The product was characterized by XRD, IR, FESEM. The results showed that pure pseudocube hematite particles could be prepared under the experimental conditions of solution initial pH 7, β=0.09 （β= [Fe2＋ ]/[δ-FeOOH]）, air oxidation temperature and time of 100℃ and 48 h respectively. The product crystallized integrally with particle diameter 90--100 nm, and its color was brightly red. This is a new method to prepare high-purity nano-iron oxide red with the characteristics of simple operation, nonpollution and low cost.