邻菲罗啉导向合成缆线状纳米结构CePO4和Ce0.95PO4:Tb0.05及其发光性能  

Phen-doped Synthesis and Luminescence Properties of CePO4 and Ce0.95PO4∶Tb0.05 Cable-like Nanowires

作　　者：杨愧锁 朱晓伟 宝金荣[1] 李文先[1] YANG Kui-suo;ZHU Xiao-wei;BAO Jin-rongI;LI Wen-xianl(The College of Chemistry and Chemical Engineering,Inner Mongolia University,Hohhot 010021,China;College of Pharmacology,Medical College of Inner Mongolia,Hohhot 010110,China)

机构地区：[1]内蒙古大学化学化工学院,内蒙古呼和浩特010021 [2]内蒙古医科大学药学院,内蒙古呼和浩特010110

出　　处：《稀土》2018年第4期61-68,共8页Chinese Rare Earths

基　　金：国家自然科学基金(21266015);内蒙古重大自然科学基金(2015ZD01);内蒙古自然科学基金(2015MS0502);内蒙古自治区高等学校科学研究项目(NJZY14008)

摘　　要：采用水热法通过调节邻菲罗啉（phen）的加入量导向合成了六方相CePO4及Ce0.95PO4∶Tb0.05纳米线。用X射线衍射（XRD）、场发射扫描电镜（FE-SEM）、透射电镜（TEM）分析产物的相结构、晶粒尺寸及微观形貌。实验结果表明,当反应体系中不加入导向剂phen时,获得分散不均匀的CePO4纳米棒;加入phen使Ce^（3＋）∶phen摩尔比为1.0∶0.5时,得到分散均匀的直径约20 nm、长约2μm^3μm的CePO4缆线状纳米线,phen增加到Ce^（3＋）∶phen摩尔比为1.0∶3.0时,又获得直径约20 nm^30 nm、长约200 nm CePO4纳米棒。发现反应体系中phen加入量会影响产物形貌的控制合成,所以讨论了phen对产物微观形貌的影响。不同Ce^（3＋）∶phen摩尔比下所得产物CePO4的荧光性质表明,当Ce^（3＋）∶phen摩尔比为1.0∶0.5时,所合成的纳米线的发射强度比无添加phen时所获产物的荧光强度增强,随着Ce^（3＋）∶phen摩尔比的减少,所合成产物的发光强度反而降低。发现随着产物长径比的增加,荧光强度增强,Ce0.95PO4∶Tb0.05中Ce^（3＋）将能量传递给Tb3＋,敏化Tb3＋的发光。Nanostructured cable-like CePO4 and Ce0. 95 PO4∶ Tb0. 05 was controllably synthesized through a phen-induced hydrothermal route. The structures,sizes and morphologies of the products were studied by X-ray powder diffraction（ XRD）,field-emission scanning electronic microscopy（ FE-SEM） and transmission electron microscope（ TEM）. By only varying the addition of phen in the reaction system,CePO4 nanostructures with different sizes could be selectively produced. The irregular nanorods were obtained without addition of phen. When molar ratio of Ce^（3＋）to phen was 1. 0 ∶ 0. 5,the CePO4 cable-like nanowires with a diameters of about 20 nm and lengths of 2 ~ 3 μm were inductively crystallized. When molar ratio of Ce^（3＋）to phen increased to 1. 0 ∶ 3. 0,the CePO4 nanorods with a diameters of 20 ~ 30 nm and lengths of 200 nm were obtained. The phen was found to play a role for the oriented growth of the nanowires. A possible formation mechanism for the effect of phen concentration on the size and morphology of CePO4 is also proposed. The luminescent properties of CePO4 nanowires prepared with different molar ratio of Ce^（3＋）to phen were investigated. Interestingly,the cable-like nanowires prepared with molar ratios of Ce^（3＋）to phen 1. 0 ∶ 0. 5 showed the strongest photoluminescence,which might resulted from the high aspect ratio. With the molar ratio of Ce^（3＋）to phen increased,the emission intensity of the synthesized products was decreased. It was found that the fluorescence intensity of the product decreased with the decrease of the aspect ratio,Ce0. 95 PO4∶ Tb0. 05 nanowires exhibited highly enhanced photoluminescence.

关 键 词：邻菲罗啉 CePO4纳米线 水热合成 荧光 

分 类 号：O614.33[理学—无机化学]