高频热等离子体制备Mn掺杂的棒状纳米氧化锌  

Synthesis of One-dimension Mn Doped ZnO Nanostructures Using Radio Frequency Thermal Plasma

作　　者：胡鹏[1] 施昌勇[2] 袁方利[1] 李晋林[1] 

机构地区：[1]中国科学院过程工程研究所多相复杂系统国家重点实验室,北京100190 [2]北京服装学院基础部,北京100029

出　　处：《过程工程学报》2009年第2期398-402,共5页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:50574083);国家高技术研究发展计划(863)基金资助项目(编号:2008AA03Z308);北京印刷学院印刷包装材料与技术北京市重点实验室开放课题(编号:kf200702)

摘　　要：以锌粉和MnCl2为反应物,在高频感应热等离子体中制备了Mn掺杂的ZnO纳米棒.通过XRD,FESEM,TEM和HRTEM对产物的结构、形貌进行了分析.随着Mn掺杂量的增加,ZnO的衍射峰向小角方向移动,证实掺杂的Mn原子进入了ZnO晶体的晶格,ZnO纳米棒的长径比逐渐减小,未掺杂的ZnO纳米棒直径约为30nm,长度约为2μm,当掺杂的Mn/Zn摩尔比为4%时,掺杂后的ZnO纳米棒直径约为100nm,长度约为200nm.Mn掺杂的ZnO纳米棒显示出了室温铁磁性特征,且随Mn掺杂含量提高而增强,当Mn掺杂量由0.25%增加到4%时,ZnO纳米棒的矫顽力从78Oe上升到149Oe.One dimensional ZnO nanostructures doped with Mn were synthesized using a radio frequency （RF） thermal plasma with the mixture of Zn and MnCl2 powders as staring materials. The influences of Mn doping on the morphology and properties of synthesized products were investigated. It is found that the peak positions of （100）, （002） and （101） shift a little to the smaller 28, which confirms that Mn is doped into ZnO crystal lattice. SEM, TEM and HRTEM were used to characterize the synthesized Mn doped one dimensional ZnO The length of synthesized doped ZnO decreases from about 2 μm to 200 nm, and the diameter increases from about 30 nm to 100 nm when the mole ratio of Mn to Zn increases to 4%, respectively. The synthesized one dimensional Mn doped ZnO nanostructures exhibit ferromagnetism under normal temperature, and the magnetization increases with the increase of doped Mn concentration.

关 键 词：ZNO纳米棒 掺杂 热等离子体 

分 类 号：O784[理学—晶体学] TQ123.41[化学工程—无机化工]