针状纳米α-Fe_2O_3包覆二氧化钛复合颗粒的制备和表征  

Preparation and Characterization of Needle Nano-α-Fe_2O_3 Coated Titania Composite Particles

作　　者：计竹娃[1] 包华辉[2] 

机构地区：[1]浙江医药高等专科学校,浙江宁波315100 [2]中国石油大连润滑油研发中心,辽宁大连116032

出　　处：《江苏化工》2007年第4期21-23,37,共4页Jiangsu Chemical Industry

摘　　要：采用溶胶法制备了针状α-Fe2O3包覆二氧化钛的复合纳米颗粒,并通过透射电镜(TEM)、X射线衍射(XRD)、能谱元素分析(EDS)对产物形貌和晶相组成进行了表征,对其形成机理进行了初步分析。TEM结果显示二氧化钛颗粒表面被一层针状氧化铁包覆,通过TEM观察估计其产率在50%以上。而紫外可见吸收谱表明该复合颗粒在相对于纯二氧化钛紫外光和可见光区域吸收都有较大的增强。A new type of needle α-Fe2O3 coated titania composite particles were prepared via the colloidal method and characterized by XRD,TEM,and EDS methods respectively.The needle α-Fe2O3 was synthesized at first by hydrolysis and oxidation using ferrous sulfate as precursor,and then the composite particles were prepared with the pre-synthesized needle α-Fe2O3 at 95 ℃ using ethanol as a co-solvent,urea as an additive and ammonium sulfate as a dispersing agent.A possible formation mechanism of the composite particles was briefly discussed in this article.

关 键 词：二氧化钛 包覆 针状 Α-FE2O3 

分 类 号：TB383[一般工业技术—材料科学与工程] TQ134.1+1[化学工程—无机化工]