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Method for improving luminescence property through long-lasting phosphor material surface modification

A technology of long-lasting luminescence and surface modification, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of insufficient luminescence performance, and achieve the effects of simple and feasible preparation method, simple synthesis process, and good social and economic benefits

Inactive Publication Date: 2018-09-28
SHAANXI UNIV OF SCI & TECH
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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 provide a method for improving the luminescent performance by modifying the surface of the long afterglow luminescent material. 2 o 4 :Eu 2+ , Dy 3+ The surface modification of luminescent materials solves the problem of insufficient luminescent performance

Method used

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  • Method for improving luminescence property through long-lasting phosphor material surface modification
  • Method for improving luminescence property through long-lasting phosphor material surface modification
  • Method for improving luminescence property through long-lasting phosphor material surface modification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step 1, the SrAl 2 o 4 : Eu 2+ , Dy 3+ Pour the luminescent powder into the alcohol, so that the alcohol submerges the luminescent powder, sonicate in the ultrasonic instrument for 5 minutes, filter after the ultrasonic is completed, and dry in an oven at 80°C for 15 minutes;

[0033] Step 2, the H 2 PtCl 6 Dissolved in alcohol to form a homogeneous solution, where H 2 PtCl 6 The molar concentration is 0.08mmolL -1 ;

[0034] Step 3, 1ml of H obtained in step 2 2 PtCl 6 Solution and 2ml of acetic acid were added to 500ml of alcohol to form a uniform solution;

[0035] Step 4, pour the luminescent powder obtained in step 1 into the solution obtained in step 3 and stir for 10 minutes, then place it in an ultrasonic instrument, and perform ultrasonic photoreduction for 10 minutes under the irradiation of an ultraviolet lamp;

[0036] Step 5, filter the solution obtained in step 4, wash it with alcohol three times, and dry it in an oven at 80°C for 10 minutes; th...

Embodiment 2

[0041] Step 1, the SrAl 2 o 4 : Eu 2+ , Dy 3+ Pour the luminescent powder into alcohol, so that the alcohol submerges the luminescent powder, sonicate in the ultrasonic instrument for 10 minutes, filter after the ultrasonic is completed, and dry in an oven at 80-200°C for 18 minutes;

[0042] Step 2, the H 2 PtCl 6 Dissolved in alcohol to form a homogeneous solution, where H 2 PtCl 6 The molar concentration is 0.06mmolL -1 ;

[0043] Step 3, 4ml of H obtained in step 2 2 PtCl 6 Solution and 7ml acetic acid were added to 500ml alcohol to form a uniform solution;

[0044] Step 4, pour the luminescent powder obtained in step 1 into the solution obtained in step 3 and stir for 15 minutes, then place it in an ultrasonic instrument, and perform ultrasonic photoreduction for 20 minutes under the irradiation of an ultraviolet lamp;

[0045] Step 5, filter the solution obtained in step 4, wash it with alcohol for 3 times, and dry it in an oven at 120°C for 15 minutes; that i...

Embodiment 3

[0047] Step 1, the SrAl 2 o 4 : Eu 2+ , Dy 3+ Pour the luminescent powder into alcohol, so that the alcohol submerges the luminescent powder, sonicate in the ultrasonic instrument for 20 minutes, filter after the ultrasonic is completed, and dry in an oven at 150°C for 26 minutes;

[0048] Step 2, the H 2 PtCl 6 Dissolved in alcohol to form a homogeneous solution, where H 2 PtCl 6 The molar concentration is 0.2mmol L -1 ;

[0049] Step 3, 3ml of H obtained in step 2 2 PtCl 6 Solution and 7ml acetic acid were added to 500ml alcohol to form a uniform solution;

[0050] Step 4, pour the luminescent powder obtained in step 1 into the solution obtained in step 3 and stir for 15 minutes, then place it in an ultrasonic instrument, and perform ultrasonic photoreduction under the irradiation of an ultraviolet lamp for 25 minutes;

[0051] Step 5, filter the solution obtained in step 4, wash it twice with alcohol, and dry it in an oven at 100°C for 16 minutes; that is, the Sr...

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Abstract

The invention discloses a method for improving a luminescence property through long-lasting phosphor material surface modification. A layer of H2PtCl6 solution is adsorbed on the surface of a preparedSrAl2O4: Eu2+, Dy3+ luminescent material, under the irradiation of ultraviolet light, platinum particles are generated on the surface of the SrAl2O4: Eu2+, Dy3+ luminescent material, unreacted H2PtCl6 and gold particles with poor adsorption capacity are washed away by ethyl alcohol, and a SrAl2O4: Eu2+, Dy3+ long-lasting phosphor material which is loaded on the platinum surface is obtained, thereby achieving the surface modification of the SrAl2O4: Eu2+, Dy3+ luminescent material.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to a method for improving luminescent performance through surface modification of long-lasting luminescent materials. Background technique [0002] With the depletion of energy and increasingly serious environmental pollution problems, the development of new energy-saving and environmentally friendly materials and products, and the improvement and improvement of the performance of existing materials have become the focus of scientific and technological development, and are also an important direction for environmentally friendly countries to adhere to the construction of ecological civilization. Long afterglow luminescent materials can store energy after absorbing natural light, lighting and other light sources, and continue to emit light, so as to realize electroless luminescence. It is an important energy-saving and environmentally friendly material. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/64
CPCC09K11/025C09K11/7792
Inventor 海鸥魏博武秀兰任强林飞郭啸天
Owner SHAANXI UNIV OF SCI & TECH
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