均匀沉淀法制备纳米氧化铁及工艺优化  

Preparation and process optimization of nano sized ferric oxide by homogeneous precipitation method

作　　者：许小荣[1] 李建芬[1,2] 肖波[2] 余波[1] 

机构地区：[1]武汉工业学院化学与环境工程学院,湖北武汉430023 [2]华中科技大学环境科学与工程学院

出　　处：《无机盐工业》2009年第6期14-16,共3页Inorganic Chemicals Industry

基　　金：国家自然科学基金资助项目(20876066);湖北省自然科学基金重点项目(2008CDA033)

摘　　要：为研制生物质气化用纳米氧化铁掺杂的镍基催化剂,以硝酸铁为原料、尿素为沉淀剂,采用均匀沉淀法制备了纳米氧化铁,并利用X射线衍射仪(XRD)、扫描电镜(SEM)对产品性能进行了表征。同时,探讨了制备条件对氧化铁产品产率的影响,得出了最佳工艺条件:尿素与硝酸铁物质的量比为5∶1,沉淀反应温度为125℃,铁盐浓度为0.20 mol/L。最佳条件下所得纳米氧化铁粒子呈球形,分散性好,纯度较高,属立方晶系结构,平均粒径约为28 nm。For the development of Fe2O3 -doped nickel-based catalysts to be used in biomass gasification, nano-sized Fe2O3 were prepared by homogeneous precipitation method with ferric nitrate [ Fe （NO3）3 · 9H2O] as raw material and with urea as precipitator. Different approaches, such as XRD and SEM, were used to characterize the products. Meanwhile, effects of various technical parameters in preparation process on the yield of products were investigated, and optimal conditions were found for preparing nano-sized Fe2O3 ,which were as follows：molar ratio of urea to Fe（ NO3 ） 3 · 9H2O was 5： 1, temperature of precipitation reaction was 125℃, concentration of iron salt was 0.20 mol/L. The nanoparticles prepared under the optimal conditions were spherical in shape and well dispersed ; they had high purity and a fine crystal phase of cubic syngony with a mean particle size of about 28 nm.

关 键 词：氧化铁 纳米颗粒 均匀沉淀法 生物质气化 

分 类 号：TQ138.11[化学工程—无机化工]