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TiO2:W nano-particles, and preparation method and application thereof

A nanoparticle and nanomaterial technology, applied in the field of fluorescent materials, can solve the problems of small absorption cross section, narrow excitation band, low luminous efficiency, etc., and achieve the effects of low cost, simple preparation method and high synthesis efficiency

Active Publication Date: 2021-06-18
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in rare earth up-conversion luminescent materials, rare earth ions have the characteristics of small absorption cross-section, narrow excitation band and abundant intermediate state energy levels, which make the up-conversion luminescence efficiency low.
So far, people have tried a variety of methods to enhance the upconversion luminescence of rare earths, but there is still a certain distance from practical application

Method used

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  • TiO2:W nano-particles, and preparation method and application thereof
  • TiO2:W nano-particles, and preparation method and application thereof
  • TiO2:W nano-particles, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A TiO-based 2 :W plasmon resonance effect enhanced method for upconversion luminescence, the steps are as follows:

[0043] (1) Add 1 mmol Ti(OEt) 4 , 0.15 mmol WCl 6 , 8 mL ODE, 0.5 mL OLA, 0.5 mL OA, 10 mmol ODAL and 0.8 mmol NH 4 F was mixed in a 50 mL three-necked flask.

[0044] (2) Step (1) The mixture was heated to 60 °C under nitrogen to start vacuuming, and heated to 110 °C under vacuum for 20 min.

[0045] (3) Step (2) The reaction mixture was rapidly heated to 280 °C in a nitrogen atmosphere and kept for 1 h.

[0046] (4) After the reaction in step (3), cool down to 60 °C, add acetone and stir for 10 minutes, centrifuge at 8000 rpm for 3 minutes, disperse into n-hexane, and wash three times with n-hexane and acetone 1:1 (volume ratio) . Finally, the precipitate was dispersed in 25 mL of n-hexane to obtain TiO with a concentration of 0.04 mmol / mL 2 : W solution.

[0047] figure 1 It is the TiO synthesized in Example 1 2 : Transmission electron micros...

Embodiment 2

[0060] A TiO-based 2 : W plasmon resonance effect enhanced method for upconversion luminescence, the steps are as follows:

[0061] (1) Add 1 mmol Ti(OEt) 4 , 0.10 mmol WCl 6 , 8 mL ODE, 0.5 mL OLA, 0.5 mL OA, 10 mmol ODAL and 2 mmol NH 4 F was mixed in a 50 mL three-necked flask.

[0062] (2) Step (1) The mixture was heated to 60 °C under nitrogen to start vacuuming, and heated to 110 °C under vacuum for 20 min.

[0063] (3) Step (2) The reaction mixture was rapidly heated to 280 °C in a nitrogen atmosphere and kept for 1 h.

[0064](4) After the reaction in step (3), lower the temperature to 60 °C, add acetone and stir for 10 minutes, centrifuge at 8000 rpm for 3 minutes, disperse into n-hexane, and wash three times with n-hexane and acetone 1:1 (volume ratio) . Finally, the precipitate was dispersed in 25 mL of n-hexane to obtain TiO with a concentration of 0.04 mmol / mL 2 : W solution.

[0065] Figure 4 It is the TiO synthesized in Example 2 2 : Transmission elec...

Embodiment 3

[0078] A TiO-based 2 : W plasmon resonance effect enhanced method for upconversion luminescence, the steps are as follows:

[0079] (1) Add 1 mmol Ti(OEt) 4 , 0.10 mmol WCl 6 , 8 mL ODE, 0.5 mL OLA, 0.5 mL OA, 10 mmol ODAL and 2.6 mmol NH 4 F was mixed in a 50 mL three-necked flask.

[0080] (2) Step (1) The mixture was heated to 60 °C under nitrogen to start vacuuming, and heated to 110 °C under vacuum for 20 min.

[0081] (3) Step (2) The reaction mixture was rapidly heated to 280 °C in a nitrogen atmosphere and kept for 1 h.

[0082] (4) After the reaction in step (3), lower the temperature to 60 °C, add acetone and stir for 10 minutes, centrifuge at 8000 rpm for 3 minutes, disperse into n-hexane, and wash three times with n-hexane and acetone 1:1 (volume ratio) . Finally, the precipitate was dispersed in 25 mL of n-hexane to obtain TiO with a concentration of 0.04 mmol / mL 2 : W solution.

[0083] Figure 7 It is the TiO synthesized in Example 1 2 : Transmission e...

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Abstract

The invention discloses TiO2:W nanoparticles as well as a preparation method and application thereof, and belongs to the technical field of fluorescent materials. The TiO2:W nano-particles are obtained by the following steps: (1) mixing Ti(OEt)4, WCl6, octadecene, oleylamine, oleic acid, octadecanol and ammonium fluoride to obtain a mixture; (2) heating the mixture to 55-65 DEG C in a nitrogen atmosphere, starting to vacuumize, heating to 100-120 DEG C in a vacuum state, and keeping for 10-30 minutes; and (3) heating to 270-290 DEG C in a nitrogen atmosphere, keeping the temperature for 0.5-1.5 h, cooling the system to 55-65 DEG C after the reaction is completed, adding acetone, precipitating, centrifuging, and cleaning the solid, thereby obtaining the product. The TiO2:W prepared by the invention is compounded with the up-conversion nanoparticles, so that the luminescence property of the up-conversion nanoparticles is effectively improved and reaches 17 times at most.

Description

technical field [0001] The invention belongs to the field of fluorescent materials, in particular to a TiO-based 2 : W nanocrystal up-conversion luminescent material and its preparation method. Background technique [0002] Upconversion luminescence refers to the optical process of converting two or more low-energy photons into one high-energy photon. Rare-earth up-conversion luminescent materials have the advantages of rich spectrum, narrow emission spectrum, long luminous lifetime, and good optical stability. Application prospect. However, in rare earth upconversion luminescent materials, rare earth ions have the characteristics of small absorption cross section, narrow excitation band and abundant intermediate state energy levels, which make the upconversion luminescence efficiency low. So far, people have tried a variety of methods to enhance the upconversion luminescence of rare earths, but there is still a certain distance from practical application. Obtaining high...

Claims

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Application Information

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IPC IPC(8): C01G23/053C09K11/02C09K11/85B82Y20/00B82Y30/00B82Y40/00
CPCC01G23/053C09K11/025C09K11/7773B82Y20/00B82Y30/00B82Y40/00C01P2004/03C01P2004/04C01P2006/60
Inventor 高惠平毛艳丽刘越峰金苏月
Owner HENAN UNIVERSITY
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