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Nanogold modified enhanced up-conversion luminescence composite material and preparation method thereof

A technology of composite materials and nanomaterials, which is applied in the field of nano-gold modified enhanced up-conversion luminescent composite materials and its preparation, can solve the problems of low up-conversion luminous efficiency, achieve significant economic value and application value, improve luminous efficiency, easily detectable effects

Inactive Publication Date: 2011-07-20
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of low upconversion luminescence efficiency of rare earth ion-doped upconversion nanomaterials, to provide an enhanced upconversion luminescence composite material and its preparation method

Method used

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  • Nanogold modified enhanced up-conversion luminescence composite material and preparation method thereof
  • Nanogold modified enhanced up-conversion luminescence composite material and preparation method thereof
  • Nanogold modified enhanced up-conversion luminescence composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] First dissolve Y with nitric acid 2 o 3 、Tm 2 o 3 , Yb 2 o 3 The corresponding nitrate solution was obtained. Add 4mmol sodium citrate and 10ml water into a 60ml reaction flask and stir evenly, then add 0.8mmol Y(NO 3 ) 3 , 0.2mmol Yb(NO 3 ) 3 , 0.005mmol Tm (NO 3 ) 3 Add it, continue magnetic stirring for 0.5 hours, then add 0.2519g NaF at one time and continue stirring for 2 hours, then transfer the mixed solution into a 20ml reaction kettle, and react at 180°C for 12 hours. Naturally cool to room temperature after the reaction is over, take out the reaction solution and centrifuge, pour out the supernatant, wash with distilled water and centrifuge again, repeat 3 times, then wash with 3mmol / L sodium citrate solution and centrifuge 3 times again, to obtain the obtained NaYF required 4 :Yb 3+ , Tm 3+ nano core.

[0034] In the three-neck flask, at 99°C, add the obtained 1mmol NaYF 4 :Yb 3+ , Tm 3+ Nuclei and 60ml of sodium citrate solution with a conc...

Embodiment 2

[0036] First dissolve Y with nitric acid 2 o 3 、Tm 2 o 3 , Yb 2 o 3 The corresponding nitrate solution was obtained. Add 6mmol sodium citrate and 10ml water into a 60ml reaction flask and stir evenly, then add 0.8mmol Y(NO 3 ) 3 , 0.2mmol Yb(NO 3 ) 3 , 0.005mmol Tm(NO 3 ) 3 Add it, continue magnetic stirring for 0.5 hours, then add 0.3359 g of NaF at one time, continue stirring for 2 hours, transfer the mixture into a 20ml reaction kettle, and react at 180°C for 12 hours. Naturally cool to room temperature after the reaction is over, take out the reaction solution and centrifuge, pour out the supernatant, wash with distilled water and centrifuge again, repeat 3 times, then wash with 3mmol / L sodium citrate solution and centrifuge 3 times again, to obtain the obtained NaYF required 4 :Yb 3+ , Tm 3+ nano core.

[0037] In the three-neck flask, at 99°C, add the obtained 1mmol NaYF 4 :Yb 3+ , Tm 3+ core and 60ml of sodium citrate solution with a concentration of 0...

Embodiment 3

[0039] First dissolve Y with hydrochloric acid 2 o 3 、Tm 2 o 3 , Yb 2 o 3The corresponding chloride salt solution is obtained. Add 8mmol sodium citrate and 10ml water into a 60ml reaction bottle and stir evenly, then add 0.8mmol YCl 3 , 0.2 mmol YbCl 3 , 0.005 mmol TmCl 3 Add it, continue magnetic stirring for 0.5 hours, then add 0.3359 g of NaF at one time, continue stirring for 2 hours, transfer the mixed solution into a 20ml reaction kettle, and react at 180°C for 12 hours. Naturally cool to room temperature after the reaction is over, take out the reaction solution and centrifuge, pour out the supernatant, wash with distilled water and centrifuge again, repeat 3 times, then wash with 3mmol / L sodium citrate solution and centrifuge 3 times again, to obtain the obtained NaYF needed 4 :Yb 3+ , Tm 3+ nano core.

[0040] In the three-neck flask, at 99°C, add the obtained 1mmol NaYF 4 :Yb 3+ , Tm 3+ core and 60ml of sodium citrate solution with a concentration of 0...

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Abstract

The invention belongs to the field of up-conversion luminescence materials, in particular relates to a nanogold modified enhanced up-conversion luminescence composite material and a preparation method thereof. The nanogold modified enhanced up-conversion luminescence composite material is characterized in that nanogold particles and an up-conversion luminescence nanomaterial are combined and irradiated by exciting light to realize high up-conversion luminescence efficiency from a long wave region to a short wave region by utilizing the local field enhancement effect of the nanogold particles,and the luminescence efficiency can be up to 500 times at most, therefore, the defect of low luminescence efficiency of the up-conversion nanomaterial is effectively overcome. The nanogold modified enhanced up-conversion luminescence composite material has a general formula: AReF4: Ln<3+> / Au or DF2: Ln<3+> / Au, wherein A is a metal element, such as Na, Li, K, or the like, and D is a metal element of Ca, Ba, or the like; Re is one of rare earth elements comprising Y, Gd, Lu, and the like; and Ln<3+> is one of lanthanide doped ions comprising Yb<3+>, Tm<3+>, Er<3+>, Ho<3+>, Gd<3+>, Eu<3+>, and the like. The nanogold modified enhanced up-conversion luminescence composite material provided by the invention has remarkably improved up-conversion luminescence efficiency, is easy to detect and hassimple process equipment.

Description

technical field [0001] The invention belongs to the field of up-conversion luminescent materials, and in particular relates to enhanced up-conversion luminescent composite materials decorated with nano-gold and a preparation method thereof. Background technique [0002] Rare earth-doped up-conversion fluoride luminescent materials have the advantages of adjustable luminescence, wide excitation spectrum, narrow emission spectrum, stable matrix, and long fluorescence lifetime. Therefore, up-conversion luminescent materials have a wide range of applications in various fields such as display, lighting, information storage and amplification, and medical diagnosis and treatment. The research on up-conversion luminescent materials has become the focus and frontier of luminescent materials research, which has aroused people's great attention. As early as 1959, Bloembergen et al. carried out infrared detection research based on a two-step absorption mechanism. Subsequently, in 1966...

Claims

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Application Information

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IPC IPC(8): C09K11/85
Inventor 秦伟平刘宁秦冠仕赵丹
Owner JILIN UNIV
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