表面活性剂对水热合成纳米ZnWO_4∶Eu^(3+)性能的影响  

Effect of Surfactants on the Properties of Nanosized ZnWO_4:Eu^(3+) Synthesized by Hydrothermal Method

作　　者：翟永清[1] 李璇[1] 李金航[1] 李晓媛[1] 王艳慧[1] 

机构地区：[1]河北大学化学与环境科学学院,保定071002

出　　处：《人工晶体学报》2014年第5期1061-1066,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金(20675023)

摘　　要：分别以乙二醇(EG)、丙三醇(Gly)、聚乙二醇-10000(PEG-10000)和十二烷基磺酸钠(SDS)为表面活性剂,采用水热法制备了ZnWO4∶Eu3+纳米棒,通过X射线粉末衍射仪、红外光谱、扫描电子显微镜和荧光分光光度计等分析表征了样品的物相结构、形貌和发光性能。结果表明:ZnWO4∶Eu3+红色荧光粉均为黑钨矿纯相;不同表面活性剂存在下所得样品颗粒基本呈短棒状,但长径比不同,Gly存在下所得棒状颗粒的长径比较小,粒度分布比较均匀,而以EG、PEG-10000和SDS为表面活性剂所得样品的长径比略大,粒度分布不均匀;ZnWO4∶Eu3+荧光粉的主峰位于616 nm处,归属于Eu3+的5D0→7F2电偶极跃迁;添加不同的表面活性剂对荧光粉的激发峰和发射峰的强度影响很大,其强度大小顺序为:I PEG-10000>I SDS>I EG>I Gly。ZnWO4：Eu3＋ nanorods were synthesized by hydrothermal method using ethylene glycol （EG）, glycerol （Gly）, polyethylene glycol-10000 （PEG-10000） and sodium dodecyl sulfonate （SDS） as surfactant respectively. The phase structure, morphology and luminescent properties of the as-synthesized samples were characterized hy X-ray diffraction, fourier transform infrared spectroscopy, scanning electron microscope and fluorescence spectrophotometer, respectively. The results indicate that red- emitting phosphors ZnWO4：Eu3＋ are pure wolframite structure. The particles of the as-synthesized samples under the four different surfactants are basically short rods in shape, but the slenderness ratios are different. The rodlike particles of the sample using Gly as the surfactant are smaller in slenderness ratio and are homogeneous in size. While using EG, PEG-10000 and SDS as the surfactants, the particles are larger in slenderness ratio and are inhomogeneous in size. The main emission peak of ZnWO4：Eu3＋ nanorods is at 616 nm, which is ascribed to 5D0→7F2 electronic dipole transition of Eu3＋. The different surfactants have great effect on the intensity of excitation peak and emission peak of the samples, and the intensity order is IPEG-10000〉ISDS〉IEG〉IGly.

关 键 词：ZnWO4 Eu3+ 红色荧光粉 水热法 表面活性剂 

分 类 号：TB321[一般工业技术—材料科学与工程]