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Titanate fluorescent material coated with metal nanoparticles and preparation method thereof

A technology of metal nanoparticles and fluorescent materials, applied in the field of titanate fluorescent materials coated with metal nanoparticles and its preparation, can solve the problem of low luminous intensity

Active Publication Date: 2016-01-20
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Based on this, it is necessary to provide a titanate fluorescent material coated with metal nanoparticles and a preparation method thereof with a higher luminous intensity to solve the problem of low luminous intensity of the existing core-shell structure fluorescent material

Method used

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  • Titanate fluorescent material coated with metal nanoparticles and preparation method thereof
  • Titanate fluorescent material coated with metal nanoparticles and preparation method thereof

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preparation example Construction

[0047] see figure 1 , a preparation method of a titanate fluorescent material coated with metal nanoparticles, comprising the steps of:

[0048] Step S110: Prepare a sol containing metal nanoparticles M.

[0049] The metal nanoparticles M are selected from one of Ag, Au, Pt, Pd and Cu nanoparticles.

[0050] Mix the salt solution of the metal nanoparticle M, the auxiliary agent and the reducing agent, and react to obtain a sol containing the metal nanoparticle M.

[0051] On the premise of ensuring that the sol containing the metal nanoparticles M is obtained, in order to save energy consumption, the reaction time of this step is preferably 10 minutes to 45 minutes.

[0052] The salt solution of the metal nanoparticles M can be any soluble salt, for example: nitrate, hydrochloride, sulfate and the like. For Ag and Pt, chloroauric acid (AuCl 3 ·HCl.4H 2 O) and chloroplatinic acid (H 2 PtCl 6 ·6H 2 O).

[0053] The concentration of the salt solution of metal nanoparticl...

Embodiment 1

[0080] Preparation of Ca coated with Pt nanoparticles 0.996 Li 0.002 TiO 3 : 0.002EuSiO 2 Pt 5×10-3

[0081] Preparation of sols containing Pt nanoparticles:

[0082] Weigh 51.8mg chloroplatinic acid (H 2 PtCl 6 ·6H 2 O) be dissolved in the deionized water of 17mL; After chloroplatinic acid dissolves completely, take by weighing 40.0mg sodium citrate and 60.0mg sodium dodecylsulfonate, and dissolve in the chloroplatinic acid aqueous solution under the environment of magnetic stirring ; Weigh 1.9mg sodium borohydride and dissolve it in 10mL deionized water to obtain 10mL concentration of 5×10 -3 mol / L sodium borohydride aqueous solution, while preparing 10mL concentration of 5×10 -2 mol / L hydrazine hydrate solution; in the environment of magnetic stirring, first drop 0.4mL sodium borohydride aqueous solution into the chloroplatinic acid aqueous solution, stir for 5min, and then add dropwise 2.6mL5×10 -2 mol / L hydrazine hydrate solution, and then continue to react for ...

Embodiment 2

[0088] Preparation of Sr coated with Ag nanoparticles 0.8 TiO 3 : 0.2EuSiO 2 Ag 1.25×10-4

[0089] Preparation of sols containing Ag nanoparticles:

[0090] Weigh 3.4mg silver nitrate (AgNO 3 ) was dissolved in 18.4mL of deionized water; when silver nitrate was completely dissolved, 42mg of sodium citrate was dissolved in an aqueous solution of silver nitrate under a magnetic stirring environment; 5.7mg of sodium borohydride was weighed and dissolved in 10mL of deionized water, Obtain 10mL concentration as 1.5×10 -2 mol / L sodium borohydride aqueous solution; under the environment of magnetic stirring, add 1.6mL1.5×10 -2 mol / L sodium borohydride aqueous solution, and then continue to react for 10min to obtain 20mL of Ag content of 1×10 -3 mol / L sol containing Ag nanoparticles.

[0091] SiO 2 Ag 1.25×10-4 Preparation of the sol:

[0092] At room temperature, weigh 0.1g PVP and dissolve it in 9.5mL deionized water, dissolve, then add 0.5mL1×10 -3 mol / LAg nanoparticles...

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Abstract

The invention provides a titanate fluorescent material coated with metal nanoparticles, the general molecular formula is A1-x-yByTiO3:xRSiO2Mz, wherein A is selected from one or both of Ca, Sr, Ba and Mg elements ; B is selected from one of Li, Na and K elements; R is selected from one or two of Eu, Gd, Tb, Tm, Sm, Ce, Dy, Mn elements; M is selected from Ag, Au, Pt , one of Pd and Cu nanoparticles; 0<x≤0.40; 0≤y≤0.40; z is the molar ratio of M to SiO2, 0<z≤1×10-2; means coating, M is the core, SiO2 is the middle shell, and A1-x-yByTiO3:xR is the outer shell. The titanate fluorescent material coated with metal nanoparticles forms a core-shell structure by introducing metal nanoparticles, and the metal nanoparticles produce a surface plasmon resonance effect, which improves the inner strength of the titanate fluorescent material coated with metal nanoparticles. Quantum efficiency, high luminous intensity. The invention also provides a preparation method of the titanate fluorescent material coated with the metal nano particles.

Description

【Technical field】 [0001] The invention relates to the field of luminescent materials, in particular to a titanate fluorescent material coated with metal nanoparticles and a preparation method thereof. 【Background technique】 [0002] At present, most of the commercial fluorescent materials are prepared by high-temperature solid-phase method. The morphology of the obtained fluorescent materials is not uniform, and repeated ball milling is required to obtain an appropriate particle size (5-10 μm). The defects and impurities introduced during the ball milling process Sometimes the luminous intensity of the fluorescent material is impaired, so that the luminous intensity of the fluorescent material is low. Applying the concept of core-shell materials to inorganic fluorescent materials, core-shell structure luminescent materials with spherical morphology and controllable size and shape can be obtained. In addition, the spherical shape has a higher packing density, which is conven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78
CPCC09K11/02C09K11/7703C09K11/7718C09K11/7731C09K11/7761C09K11/7768C09K11/025C09K11/77C09K11/7715C09K11/7728C09K11/7759C09K11/7766
Inventor 周明杰王荣陈贵堂
Owner OCEANS KING LIGHTING SCI&TECH CO LTD