Synthesizing method of Sr2MgSi2O7:Eu2+, Dy3+ nanowire with long afterglow lighting function

A technology of long afterglow luminescence and synthesis method, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of single luminescence color, easy hydrolysis, unsatisfactory luminous intensity and afterglow performance, etc.

Inactive Publication Date: 2012-11-14
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

[0003] The long afterglow materials studied earlier are mainly sulfides. The disadvantages are easy hydrolysis, poor stability, and unsatisfactory luminous intensity and afterglow performance.
Since the late 1960s, alkaline earth aluminate long afterglow materials have been widely studied. This system has the advantages of high luminous brightness, long afterglow time, and no radioactive elements. Howev

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0015] Weigh 10mmol of Mg(NO 3 ) 2 , 20mmol of Sr(NO 3 ) 2 , 0.2mmol Eu(NO 3 ) 3 And 0.1mmol of Dy(NO 3 ) 3 , Dissolve in 1000ml solvent which is mixed with water and ethanol at a volume ratio of 2:1, then add 20mmol of Na 2 SiO 3 Solid, magnetically stirred at 80℃ for 1 hour to obtain a white suspension, with 3mol / L HNO 3 Adjust the pH value of the suspension to 3, add a 10wt% aqueous solution of polyvinyl alcohol, which contains 5.7757g of polyvinyl alcohol, and stir it magnetically at 80°C for 1 hour at a speed of 500 revolutions / min. Ultrasound at room temperature for 8 minutes, with an ultrasonic oscillation frequency of 20-40kHz, move to a hydrothermal kettle and seal, react at 180°C for 24 hours, pour out the reaction solution, cool to room temperature naturally, filter, and dry the white precipitate at 100°C in vacuum 15 hours, then put it in a muffle furnace, calcine under the condition of 200kPa pressure of hydrogen as a reducing atmosphere, heating rate 5℃ / min, maximum...

example 2

[0017] Weigh 10mmol of Mg(NO 3 ) 2 , 20mmol of Sr(NO 3 ) 2 , 0.3mmol Eu(NO 3 ) 3 And 0.1mmol of Dy(NO 3 ) 3 , Dissolve in 1000ml solvent which is mixed with water and ethanol at a volume ratio of 2:1, then add 20mmol of Na 2 SiO 3 Solid, magnetically stirred at 80℃ for 1 hour to obtain a white suspension, with 3mol / L HNO 3 Adjust the pH value of the suspension to 2, add a 10wt% aqueous polyacrylamide solution, which contains 5.8009 g of polyacrylamide, stir it magnetically at 80°C for 1 hour, and the speed of magnetic stirring is 500 revolutions / min. Ultrasonic treatment at room temperature for 8 minutes, the ultrasonic oscillation frequency is 20-40kHz, move to a hydrothermal kettle and seal, react at 160℃ for 24 hours, pour out the reaction solution, cool to room temperature naturally, filter, and dry the white precipitate in vacuum at 100℃ After 15 hours, put it in a muffle furnace, and calcine under the conditions of 200kPa pressure of hydrogen as a reducing atmosphere, heati...

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Abstract

The invention discloses a synthesizing method of an Sr2MgSi2O7:Eu2+, Dy3+ nanowire with a long afterglow lighting function. The synthesizing method comprises the steps of dissolving Mg(NO3)2, Sr(NO3)2, Eu(NO3)3 and Dy(NO3)3 into a mixed solvent of water and ethanol to prepare nitrate mixed solution with the total concentration of metal ions being 0.02-0.05mol/L, then adding Na2SiO3 solid into nitrate mixed solution to obtain white turbid liquid, adjusting the pH value to be 2-3, then adding macromolecule template agent, moving into a hydrothermal kettle and sealing, reacting for 2-4h at 150 DEGC-180 DEG C, pouring out reaction solution, naturally cooling the reaction solution to room temperature, and filtering the reaction solution to obtain a white precipitate, conducting vacuum drying on the white precipitate for 10-20h at 80 DEG C-110 DEG C, and putting the white precipitate into a muffle furnace, and forging under reducing atmosphere to obtain the MgSr2SiO4:Eu2+, Dy3+ nanowire with long afterglow lighting function, which is 30-60nm in diameter and 4mum in length. The synthesizing method has the characteristics of simple process, low energy consumption, uniform product size, no agglomeration, excellent lighting performance and the like, and provides a new approach for the research of nano long afterglow materials.

Description

Technical field [0001] The invention relates to a Sr with long afterglow luminescence function 2 MgSi 2 O 7 :Eu 2+ , Dy 3+ The method for synthesizing nanowires belongs to the field of inorganic non-metallic materials. Background technique [0002] Long afterglow material is a special kind of luminescent material. At room temperature, its luminescence can last for more than several hours without the excitation source. As people pay more and more attention to environmental protection and energy saving, the application fields of long afterglow materials are also expanding. They are widely used in emergency displays, traffic signs, luminous watches, fabric printing and other fields. At the same time, they are used in large-screen color display panels, computer monitors, X Radiation intensifying screens, information storage and other fields have great application potential. Long afterglow luminescent materials have become indispensable materials in people's daily life. [0003] The l...

Claims

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Application Information

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IPC IPC(8): C09K11/59
Inventor 李锋锋张明熹吕朝霞王超杨文毅黄志鹏
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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