聚丙烯酰胺凝胶合成尖晶石纳米铝酸锌的络合机理及发光性能  

Synthesis of Spinel Nano-ZnAl_2O_4 by Polyacrylamide Gel Method and Its Chelating Mechanism and Photoluminescence Performance

作　　者：孙光壮 王仕发[1] 孙光爱[1] 向霞[2] 祖小涛[2] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,绵阳621900 [2]电子科技大学物理电子学院,成都610054

出　　处：《材料研究学报》2015年第10期721-728,共8页Chinese Journal of Materials Research

基　　金：国家自然科学基金11105128资助项目~~

摘　　要：用改进的聚丙烯酰胺凝胶法制备颗粒近似呈球形且粒度均匀的ZnAl2O4纳米颗粒,并制备了3种锌铝摩尔比的ZnAlO样品。XRD结果表明,当锌铝摩尔比为1∶1.8和1∶2时,在900℃煅烧干凝胶制备的样品均为纯相的ZnAl2O4粉体。SEM结果表明,锌铝摩尔比为1∶2制备的样品其颗粒尺寸随着煅烧温度的提高而增大,且在900℃出现严重的团聚。荧光光谱分析结果表明,激发波长为352nm时出现一个469nm的蓝光发射峰。基于实验结果,研究了其络合机理和发光机理。ABSTRACT Spherical ZnAI20, nanoparticles with fled polyacrylamide gel method, and three xerogel uniform size distribution were synthesized by a modi- ZnAIO samples with different ratios of Zn to AI were prepared. X-ray diffraction analysis results show that the ZnAI204 powders can be obtained after calcina- tion at 900℃ for the two xerogel samples with mole ratios of Zn2＋：AP＋1：1.8 and 1：2, respectively. Scan- ning electron microscope images reveal that the particle size of the sample with mole ratio of 1：2 increas- es with the increasing calcination temperature; when calcination at 900℃, significant agglomeration of particles can be observed. The photoluminescence emission spectrum for ZnAI20, nanoparticles detect- ed at A.x= 352 nm shows a blue emission peak located at 469 nm. Finally, the chelating mechanism and luminescence mechanism of ZnAI20, nanoparticles have been discussed based on the experimental re- sults.

关 键 词：无机非金属材料 聚丙烯酰胺凝胶法 ZnAl2 O4 蓝光发射 络合机理 

分 类 号：TB321[一般工业技术—材料科学与工程]