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特殊形貌GdF3∶Eu^3＋纳米发光材料的制备及性能

ISSN号：0251-0790
期刊名称：《高等学校化学学报》
时间：0
分类：O614.33[理学—无机化学;理学—化学]
作者机构：[1]长春理工大学化学与环境工程学院,长春130022
相关基金：国家自然科学基金（批准号：51072026 50972020）; 吉林省科技发展计划项目（批准号：20090528）资助

关键词： GdF3∶Eu3+, 形貌, 水热法, 纳米发光材料, GdF3∶Eu3＋, Morphology, Hydrothermal method, Luminescent nanomaterial

中文摘要：

以PEG-2000、柠檬酸和甘氨酸为表面活性剂,采用水热法制备出扁平纳米棒、纳米花和纳米片状的GdF3∶Eu3＋发光材料,并对其结构和性能进行了表征.XRD结果表明,所得样品均为正交晶系.FESEM照片表明,使用不同表面活性剂所制备的产物形貌不同.研究了以PEG-2000为表面活性剂时反应物浓度对产物形貌的影响,并对其生长机理进行了探讨.荧光光谱表明,在不同波长激发光的照射下,GdF3∶Eu3＋纳米晶的最强发射峰均位于591 nm处,对应于Eu3＋的5D0→7F1磁偶极跃迁.GdF3∶Eu3＋的Gd3＋-Eu3＋之间发生了有效的能量传递.不同形貌样品的发光强度不同.

英文摘要：

GdF3∶Eu3＋ luminescent nanomaterials with the morphologies of flat nanorods,nanoflowers and nanoflakes were prepared with PEG-2000,citrate acid and glycine as surfactant via hydrothermal method.The structure and properties were characterized.XRD results show that the samples are all orthogonal phase GdF3.FESEM images indicate that the morphologies vary from the kinds of surfactants.The effect of the reactant concentration on the morphology of the products using PEG-2000 as surfactant was studied,and the growth mechanism was discussed.Photoluminescence spectra show that the luminescent intensities of the samples with various morphology are different.The effective energy transfer process occured between Gd3＋ and Eu3＋ in GdF3∶Eu3＋.The strongest emission peak of GdF3∶Eu3＋ nanocrystal is near 591 nm,corresponding to 5D0→7F1 magnetic dipole transition of Eu3＋ under ultroviolet excitation wavelength.

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