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Molybdate upconversion luminescent material, preparation method and application thereof

A luminescent material, molybdate technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of low luminescent purity, complex preparation process, environmental pollution, etc., and achieve high luminescent brightness, simple synthesis process, and environment-friendly. Effect

Inactive Publication Date: 2016-02-03
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The problem to be solved by the present invention is to overcome the disadvantages of the existing up-conversion luminescent materials, such as complex preparation process, low luminous purity, and easy to cause environmental pollution, to provide a product with low price of raw materials and simple preparation process, and the obtained product has high luminous color purity and excellent performance Novel molybdate up-conversion luminescent material, preparation method and application thereof

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  • Molybdate upconversion luminescent material, preparation method and application thereof
  • Molybdate upconversion luminescent material, preparation method and application thereof
  • Molybdate upconversion luminescent material, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Preparation of ZnGd 2.8 Er 0.4 Yb 0.8 Mo 3 o 16

[0040] According to the chemical formula ZnGd 2.8 Er 0.4 Yb 0.8 Mo 3 o 16 The stoichiometric ratio of each element in is weighed as ytterbium oxide Yb 2 o 3 : 1.051 g, erbium oxide Er 2 o 3 : 0.51 g, zinc oxide ZnO: 0.543 g, gadolinium oxide Gd 2 o 3 : 2.11 g, ammonium molybdate (NH 4 ) 6 Mo 7 o 24 ?4H 2 O: 3.53 grams. After grinding and mixing uniformly in an agate mortar, select the air atmosphere for the first pre-sintering, the pre-sintering temperature is 250 ° C, and the sintering time is 5 hours, then cool to room temperature, and take out the sample. After the pre-sintering, the mixture is fully ground again, placed in the air atmosphere, and the second calcination is carried out at 450°C for 12 hours, then naturally cooled to room temperature, the sample is taken out, and the third calcination is carried out after fully grinding , the calcination temperature is 950°C, the calcination time is...

Embodiment 2

[0044] Preparation of ZnLa 0.8 Er 1.2 Yb 2 Mo 3 o 16

[0045] According to the chemical formula ZnLa 0.8 Er 1.2 Yb 2 Mo 3 o 16 The stoichiometric ratio of each element in is weighed as ytterbium oxide Yb 2 o 3 : 2.627 g, erbium oxide Er 2 o 3 : 1.53 g, zinc oxide ZnO: 0.543 g, lanthanum oxide La 2 o 3 : 0.869 g, ammonium molybdate (NH 4 ) 6 Mo 7 o 24 ?4H 2 O: 3.53 grams. After grinding and mixing uniformly in an agate mortar, select the air atmosphere for the first pre-sintering, the pre-sintering temperature is 300°C, and the sintering time is 7 hours, then cool to room temperature, and take out the sample. After pre-sintering, grind the mixture fully and evenly again, put it in the air atmosphere, and carry out the second calcination. Three times of calcination, the calcination temperature is 1000°C, and the calcination time is 5 hours. After natural cooling, the powder is evenly ground to obtain a new type of molybdate up-conversion luminescent material...

Embodiment 3

[0048] Preparation of ZnTm 3 Er 0.2 Yb 0.8 Mo 3 o 16

[0049] According to the chemical formula ZnTm 3 Er 0.2 Yb 0.8 Mo 3 o 16 The stoichiometric ratio of each element in the ytterbium nitrate Yb (NO 3 ) 3 ?5H 2 O: 2.395 grams, erbium nitrate Er (NO 3 ) 3 ?5H 2 O: 0.426 grams, zinc oxide ZnO: 0.543 grams, thulium nitrate Tm (NO 3 ) 3 ?6H 2 O: 9.26 g, ammonium molybdate (NH 4 ) 6 Mo 7 o 24 ?4H 2 O: 3.53 grams, then take by weighing citric acid by 0.5wt% of each above-mentioned drug quality respectively. First, dissolve the above-mentioned raw materials weighed in an appropriate amount of nitric acid solution, stir at 50°C until completely dissolved, and dilute with 5 times its volume of deionized, and then add the weighed citric acid to each solution, and stirred under magnetic stirring for 0.5 hours. Finally, mix the obtained solutions, continue heating and stirring at 50°C for 2 hours, let stand, and dry to obtain a fluffy precursor; place the precurso...

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Abstract

The invention discloses a molybdate up-conversion luminescent material, a preparation method and application thereof. The structural formula of the molybdate up-conversion luminescent material is ZnR(4-4(x+y))Mo3O16:4xEr<3+>,4yYb<3+>, wherein x and y are the mole percent of doped Er<3+> and Yb<3+> respectively, xis more than or equal to 0.0001, y is more than or equal to 0.1, and x+y is larger than 0.1 and smaller than 1.0. According to the molybdate up-conversion luminescent material, the Yb<3+> is taken as a sensitized ion, so that the up-conversion luminescence of the Er<3+> is achieved; the excitation wavelength is 970 nanometers; a luminescent peak is formed through the energy level transition <2>H(11 / 2)-<4>I(15 / 2), <4>S(3 / 2)-<4>I(15 / 2), <4>F(9 / 2)-<4>I(15 / 2) of the Er<3+> within the wavelength range of 500-700 nanometers. The molybdate up-conversion luminescent material prepared by adopting a high-temperature solid phase method or a chemical synthesis method is high in color purity and stable in property and can be applied to the fields of counterfeiting prevention, biological molecule fluorescence labeling, three-dimensional display and the like.

Description

technical field [0001] The invention relates to a luminescent material, a preparation method and its application, in particular to a novel molybdate up-conversion luminescent material, a preparation method and its application, and belongs to the technical field of luminescent materials. Background technique [0002] Up-conversion luminescent materials based on rare earth material systems mainly use the metastable energy level characteristics of rare earth elements, which can absorb multiple low-energy long-wave radiations, so that infrared light invisible to the human eye can be turned into visible light, and has up-conversion properties. It has the advantages of high luminous efficiency, can effectively reduce photoionization, tunable output wavelength, and narrow emission spectrum. It is widely used in three-dimensional display, infrared detection, laser and many other fields. [0003] Due to the rare earth erbium ion Er 3+ With abundant energy levels, it has important bl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78
Inventor 黄彦林关莹陶正旭秦琳
Owner SUZHOU UNIV
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