镧/镱共掺杂二氧化锡纳米粉体的制备与表征

Preparation and Characterization of Lanthanum and Ytterbium Co-doped Tin Oxide Nano-powder

以LaCl3.7H2O、Yb(NO3)3.6H2O、SnCl4.5H2O为原料,氨水为沉淀剂,PEG-600作分散剂,采用化学共沉淀法制备出了镧/镱共掺杂二氧化锡纳米粉体。考察了反应pH值、煅烧温度、镧掺杂量对镧/镱共掺杂二氧化锡粉体的物相和形貌的影响,对粉末的前驱体进行综合热分析(TG-DTA),利用X射线衍射(XRD)仪、扫描电镜(SEM)对最终产物的结构和形貌进行表征,优化得到共沉淀法制备的最佳条件:反应温度60℃,pH值为9,煅烧温度800℃,镧/镱/锡的摩尔掺杂比为0.5:1:8.5。

Lanthanum and ytterbium co-doped tin oxide nano-powder were prepared by a chemical co-precipitation method using La Cl_3·7H_2O, Yb(NO_3)_3·6H_2O and Sn Cl_4·5H_2O as raw material, NH_3·H_2O as precipitant, and PEG-600 as dispersant. The effect of processing parameters on the particles was investigated, including reaction temperature, terminal p H, doping content, calcination temperature. The lanthanum and ytterbium co-doped tin oxide powder precursors were studied by TG-DTA. The product particles were characterized by X-ray diffraction(XRD) and scanning electron microscopy(SEM). The optimized conditions for preparing nanometer lanthanum and ytterbium co-doped tin oxide powder are as follows: reaction temperature of 60 ℃, terminal p H 3,calcination temperature 800 ℃, and lanthanum/ytterbium/tin mole doping ratio 0.5:1:8. 5.