| 多级结构Mg3B2O6:Eu3+花状微球的制备、表征及其发光性能 | |
| Synthesis, Characterization and Photoluminescence Properties of Hierarchical Mg3B2O6:Eu3+ Flower-Like Microspheres | |
| 摘要: 以硝酸镁(Mg(NO3)2·6H2O)和硼砂(Na2B4O7·10H2O)为原料,稀土元素Eu3+为激活剂,采用聚乙烯吡咯烷酮(PVP)辅助共沉淀法得到前驱体,并通过焙烧制备了多级结构Mg3B2O6:Eu3+花状微球。通过XRD、SEM、TEM以及荧光光谱等手段分别对前驱体煅烧产物的结构、形貌、组成和荧光特性进行了表征。实验表明,在波长为393 nm激发光的激发下,所得到的产品在612 nm处有明显的特征发射峰,对应于Eu3+的(5D0→7F2)特征跃迁发射。这一荧光性质使得该材料在荧光灯、显示系统和光电设备应用中具有广阔的前景。同时我们还探讨了微球的形态、Eu3+的掺杂量及焙烧温度对花状微球荧光性能的影响。 | |
| 关键词: Mg3B2O6:Eu3+ 多级微球 化学合成 发光性能 | |
| 基金项目: 国家自然科学基金(No.10804099,51002137)和浙江省自然科学基金(No.Y4080382)资助项目。 | |
| Abstract: Flower-like Mg3B2O6:Eu3+ hierarchical microspheres, with an average diameter of 2.0~2.5 μm, were successfully synthesized via a simple precipitation method using poly (vinyl pyrrolidone) as template and followed by a subsequent heat treatment. The structure, morphology, composition and photoluminescence (PL) properties of as-prepared and calcined samples were systematically characterized by XRD, SEM, TEM and PL spectra, respectively. The resultant products presented a strong characteristic of red emission at 612 nm corresponding to 5D0→7F2 of the Eu3+ transition under ultraviolet excitation at 393 nm, which may open a wide door for its applications especially in fluorescent lamps, display systems, and optoelectronic devices. Besides, we demonstrated the morphology, concentration of Eu3+ as well as calcination temperature had a great effect on the PL properties of the microspheres. | |
| Keywords: Mg3B2O6:Eu3+ hierarchical microspheres chemical synthesis photoluminescence | |
| 投稿时间：2015-03-11 修订日期：2015-06-03 | |
| 摘要点击次数: 1514 | |
| 全文下载次数: 1870 | |
| 陈爱民,汪晶,薄盈盈,刘锐,顾培,潘再法,胡军.多级结构Mg3B2O6:Eu3+花状微球的制备、表征及其发光性能[J].无机化学学报,2015,31(8):1548-1554. | |
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