摘要
水热法制备了高纯度六方相NaGdF_4:Yb^(3+),Tm^(3+)纳米颗粒,采用以聚乙烯吡咯烷酮(PVP)为表面活性剂,通过X射线衍射(XRD),透射电镜(TEM),元素分析(mapping),荧光光谱学等手段对所制备的NaGdF_4纳米棒的结构与形貌进行表征,发现提高反应时间对粒子尺寸和形貌的影响不明显,表面活性剂的浓度对发光强度有明显影响,并着重研究粒子长径比和发光强弱关系的特点。结果表明:共掺杂NaGdF_4纳米颗粒在980 nm下可发射出475 nm蓝光,以及695 nm红光800 nm的强近红外光。且发现颗粒长径比越大,荧光强度越强,进一步探索了颗粒长径比调控的荧光增强机理。
High purity hexagonal NaGdF4 nanorods were prepared by hydrothermal method with polyvinylpyrrolidone（PVP） as the surfactant. The structure and morphology of the prepared series of beta-NaGdF4 nanorods were characterized by means of X ray diffraction（XRD）, transmission electron microscopy（TEM）, elemental analysis（mapping） and fluorescence spectroscopy. It＇s found that the effect of reaction time on particle size and morphology was not obvious. The concentration of surfactant had a significant effect on the luminescence intensity of UC. The results show that the co-doped NaGdF4 nanoparticles can emit 475 nm blue light at 980 nm, as well as the strong near infrared light of 695 nm red light at 800 nm; the larger the particle diameter ratio is, the stronger the fluorescence intensity is.
作者
房辰辰
唐建国
焦吉庆
黄林军
王瑶
刘继宪
王薇
王彦欣
张晓琳
李潇
Laurence A.Belfiore
FANG Chen-chen TANG Jian-guo JIAO Ji-qing HUANG Lin-jun WANG Yao LIU Ji-xian WANG Wei WANG Yan-xin ZHANG Xiao-lin LI Xiao Laurence A. Belfiore(International Joint Research Center for Hybrid Materials Technology, National Base for the International Cooperation of Polymer Hybrid Materials, Department of Materials Science and Engineering, Qingdao University, Shandong 266071, China Department of Chemical and Biological Engineering, Colorado State University, Fort Collins, CO 80523, USA)
出处
《当代化工》
CAS
2017年第4期595-598,共4页
Contemporary Chemical Industry
基金
国家创新引智计划“111计划”支持
国家自然科学基金(#51273096,#51373081,#51473082,#51403144)
国家高端外国专家项目(GDW20143500164,GDT20153500059,GDW20143500164)
国家重点研发计划“政府间国际科技合作”重点专项(2016YFE10800)
山东省优秀中青年科学家科研奖励基金(2014BSB01511)
中国博士后科学基金:(2014M560536)
