纺锤形α-Fe_2O_3粒子的溶液催化合成  

Catalytic Synthesis of Spindle-type α-Fe_2O_3 Particles in Solution

作　　者：张秀丽[1] 刘辉[1] 魏雨[1] 马子川[1] 

机构地区：[1]河北师范大学化学与材料科学学院,石家庄050016

出　　处：《化学学报》2005年第12期1141-1146,i005,共7页Acta Chimica Sinica

基　　金：河北省自然科学基金(No.501115)资助项目.

摘　　要：以Fe2(SO4)3为原料,在pH为4～7、微量催化剂Fe2+离子及晶体助长剂NaH2PO4存在下,沸腾回流,短时间可直接成长出纺锤形α-Fe2O3超细粒子.与强迫水解法和水热法比较,该方法具有操作简单、反应物浓度高、反应条件温和及重现性好等优点.同时研究了各种因素对产物的轴比及相转化速率的影响.Spindle-type ultrafine α-Fe2O3 particles were directly synthesized at pH=4～7 under the conditions of boiling reflux in a short time. In this method, Fe2(SO4)3 was used as raw material, NaH2PO4 as growth-regulating agent and trace FeSO4 as catalyst. Compared to the forced hydrolysis method and hydrothermal synthesis, the proposed method was of characteristics of simple operation, high concentration, mild reaction condition, good reproducibility, etc. All kinds of factors that might affect the aspect ratios and phase transformation rate of spindle-type α-Fe2O3 were studied.

关 键 词：Α-FE2O3 纺锤形 催化合成 FE2(SO4)3 NaH2PO4 溶液 强迫水解法 反应物浓度 超细粒子 转化速率 反应条件 助长剂 催化剂 水热法 重现性 晶体 离子 

分 类 号：O643.3[理学—物理化学]