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Preparation method and application of KSc2F7:Yb, Er up-conversion fluorescent nanorod

A nanorod, ksc2f7 technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of sensitive synthesis conditions, few reports of nanorods, and unreported synthesis and optical properties.

Inactive Publication Date: 2013-09-18
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Recently, Huang's group formed the Na x ScF 3+x Up-conversion nanoparticles, by adjusting the ratio of oleic acid / octadecene, two kinds of up-conversion materials with different crystal structures can be obtained (Na 3 ScF 6 and NaScF 4 ), and can emit red upconversion fluorescence (see: X.Teng, Y.Zhu, W.Wei, S.Wang, J.Huang, R.Naccache, W.Hu, A.I.Y.Tok, Y.Han, Q.Zhang , Q.Fan, W.Huang, J.A.Capobianco and L.Huang, Journal of the American Chemical Society2012, 134, 8340-8343.) Unfortunately, apart from this work, Sc-based The synthesis and optical properties of nanomaterials have remained largely unreported
[0005] Moreover, most of the research on Y / Ln-based nanomaterials is based on nanospheres, and nanorods are rarely reported.
One reason is that the structure of Y / Ln nanomaterials is less sensitive to synthesis conditions than Sc elements; another reason is that harsh synthesis conditions or high levels of doping of rare earth elements are often required to obtain nanorods.

Method used

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  • Preparation method and application of KSc2F7:Yb, Er up-conversion fluorescent nanorod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1. Pure KSc 2 f 7 : Preparation of Yb, Er nanorods

[0021] The preparation method of nanorods is described in the original literature (see: F.Wang, Y.Han, C.S.Lim, Y.Lu, J.Wang, J.Xu, H.Chen, C.Zhang, M.Hong and X.Liu , Nature2010, 463, 1061-1065) on the basis of changing the reaction monomer synthesis preparation. Put 1mmol RECl 3 (0.78mmol ScCl 3 .6H 2 O, 0.2mmol YbCl 3 .6H 2 O, 0.02 mmol ErCl 3 .6H 2 O) join in a round bottom flask that 15ml oleic acid and 17.5ml octadecene are housed, the solution is heated to 160 ℃, stirred reaction 30min, is cooled to room temperature. Contains 1.6mmol NH 4 F and 1.0mmol KOH in 10mL methanol solution were added to the solution and stirred for 30min. The methanol was evaporated, the solution was heated to 290°C under the protection of nitrogen, reacted for 1h, cooled to room temperature, added ethanol to precipitate, washed 3 times with 10mL water and 10mL ethanol, and dried under vacuum to obtain KSc 2 f 7 : ...

Embodiment 2

[0022] Example 2. Doping with KScF 4 : Yb, KSc of Er nanoparticles 2 f 7 : Preparation of Yb, Er nanorods

[0023] According to the step of embodiment 1, preparation is doped with KScF 4 : Yb, KSc of Er nanoparticles 2 f 7 : Preparation of Yb, Er nanorods, but NH 4 The amount of the substance of F was 2.8 and 4 mmol, respectively, and the other steps were the same. figure 2 and image 3 The NH 4 XRD pattern and TEM pattern when the amount of F is 4, 2.8 and 1.6 times of the rare earth content, respectively.

Embodiment 3

[0024] Example 3. Pure KSc 2 f 7 : Preparation of Yb, Er nanorods

[0025] Prepare KSc according to the steps of Example 1 2 f 7 : Yb, Er nanorods, but the temperature is changed to 270 °C, and the other steps are the same.

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Abstract

The invention discloses a KSc2F7:Yb, Er up-conversion nanorod. The nanorod is prepared by using ScCl3, NH4F and KOH for thermal decomposition reaction, using oleic acid as a surfactant and using octadecenoic acid as a high-boiling point organic solvent, and the nano rod is co-doped by Yb<3+> / Er<3+>, can be dissolved in a non-polar organic solvent and can emit strong red up-conversion fluorescent light. The cyclohexane solution of the KSc2F7:Yb, Er provided by the invention respectively emits three different fluorescent lights including blue, green and red when being treated by up-conversion fluorescence detection. But the intensity of the red fluorescent light is greatly higher than that of other two colors, finally, the cyclohexane solution displays strong red fluorescent light under the stimulation of a 980nm light source, and the cyclohexane solution can be used for preparing a fluorescence sensitive material. The invention also discloses a preparation method of the KSc2F7:Yb, Er up-conversion nanorod.

Description

technical field [0001] The present invention relates to KSc 2 f 7 : Yb, Er nanorods and their preparation and properties of strong red upconversion fluorescence. Background technique [0002] Rare earth ions have very rich spectral properties, and they play a very important role in color display, luminescence, medicine and biomarkers, solar cells and solid-state lasers (see: (a) Y.Liu, S.Zhou, D. Tu, Z. Chen, M. Huang, H. Zhu, E. Ma and X. Chen, Journal of the American Chemical Society 2012, 134, 15083-15090; (b) T. Maldiney, C. Richard, J. Seguin , N. Wattier, M. Bessodes and D. Scherman, ACS Nano 2011, 5, 854-862; (c) G. Tian, ​​Z. Gu, L. Zhou, W. Yin, X. Liu, L. Yan, S. Jin, W. Ren, G. Xing, S. Li and Y. Zhao, Advanced Materials 2012, 24, 1226-1231; (d) F. Zhang, R. Che, X. Li, C. Yao, J. Yang, D.Shen, P.Hu, W.Li and D.Zhao, Nano Letters 2012, 12, 2852-2858; (e) G.Y.Chen, H.L. Qiu, R.W.Fan, S.W.Hao, S.Tan, C.H.Yang and G. Han, Journal of Materials Chemistry 2012, 22,...

Claims

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Application Information

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IPC IPC(8): C09K11/85B82Y30/00B82Y40/00
Inventor 朱俊杰丁玉洁
Owner NANJING UNIV
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