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Preparation method for rare earth oxide nanosheet sol with positive charge

A technology of rare earth oxides with positive charges, which is applied in the fields of rare earth metal compounds, chemical instruments and methods, and nanotechnology, and can solve problems such as poor thermal stability, reduced luminescent performance, and easy destruction of hydroxide nanosheets, and achieves time-saving effect

Active Publication Date: 2014-02-12
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The rare earth compound nanosheets reported in the past are basically hydroxides, and this material has certain disadvantages, such as: poor thermal stability, when the temperature is too high, the hydroxide nanosheets are easily destroyed
In addition, there are a large number of hydroxyl groups in the rare earth hydroxide nanosheets, and the vibration of the hydroxyl groups will absorb the fluorescence of some rare earth materials (such as: Eu 3+ ), eventually leading to a great reduction in the luminescent properties of these rare earth hydroxide luminescent materials

Method used

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  • Preparation method for rare earth oxide nanosheet sol with positive charge
  • Preparation method for rare earth oxide nanosheet sol with positive charge
  • Preparation method for rare earth oxide nanosheet sol with positive charge

Examples

Experimental program
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Effect test

Embodiment 1

[0021] a. Take 2.0146g yttrium oxide, add 3.4938gNH 4 Br, ground into powder; of which: NH 4 The ratio of the added amount of Br to the amount of the rare earth oxide is about 4:1.

[0022] b. Transfer the powder into an alumina crucible, shake it tightly, and keep it in a muffle furnace at 420°C for 2 hours, then raise the temperature to 700°C for 2 hours, cool it, and use acetic acid solution (concentration of about 0.0001mol / L) washing, suction filtration and drying to obtain a pure YOBr sample.

[0023] c. Take the above-mentioned product according to the ratio of 1g / 100ml and place it in sodium benzoate solution, wherein the molar ratio of sodium benzoate to LnOBr is 2:1, take it out and cool it in the microwave field for 2 minutes at high heat, and put it in after cooling down to room temperature Microwave for 2 minutes at high heat in the microwave field, then take it out and cool it down, repeat this 5 times, wash with water, filter with suction, and dry at 50°C to ...

Embodiment 2

[0026] a, take 2.5642g yttrium oxide, add 2.2235gNH 4 Br, ground into powder; of which: NH 4 The ratio of the amount of Br added to the amount of rare earth oxide is about 2:1.

[0027] b. Transfer the powder into an alumina crucible, shake it tightly, and keep it in a muffle furnace at 420°C for 2 hours, then raise the temperature to 700°C for 2 hours, cool it, and use acetic acid solution (concentration of about 0.0001mol / L) washing, suction filtration and drying to obtain a pure YOBr sample.

[0028] c. Take the above-mentioned product according to the ratio of 1g / 100ml and place it in sodium benzoate solution, wherein the molar ratio of sodium benzoate to LnOBr is 2:1, take it out and cool it in the microwave field for 2 minutes at high heat, and put it in after cooling down to room temperature Microwave for 2 minutes at high heat in the microwave field, then take it out and cool it down, repeat this 5 times, wash with water, filter with suction, and dry at 50°C to obta...

Embodiment 3

[0031] a. Take 2.9633g europium oxide and add 8.9843g NH 4 Br, ground into powder; of which: NH 4 The ratio of the amount of Br added to the amount of rare earth oxide is about 7:1.

[0032] b. Transfer the powder into an alumina crucible, shake it tightly, and keep it in a muffle furnace at 420°C for 2 hours, then raise the temperature to 700°C for 2 hours, cool it, filter it with suction, and use acetic acid solution (concentration about 0.0001 mol / L) to obtain pure EuOBr samples.

[0033] c. Take the above-mentioned product according to the ratio of 1g / 100ml and place it in sodium benzoate solution, wherein the molar ratio of sodium benzoate to LnOBr is 2:1, take it out and cool it in the microwave field for 2 minutes at high heat, and put it in after cooling down to room temperature Microwave for 2 minutes at high heat in the microwave field, then take it out and cool it down, repeat this 5 times, wash with water, filter with suction, and dry at 50°C to obtain the sample...

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Abstract

The invention discloses a preparation method for rare earth oxide (LnO) nanosheet sol with positive charge. The method comprises the steps of: calcining raw materials including yttrium oxide, europium oxide, ammonium bromide, sodium benzoate and the like at a high temperature, to obtain an LnOBr stratified material; under the microwave condition, intercalating the stratified compound by utilizing the sodium benzoate to obtain the intercalated material; and performing ultrasonic treatment on the intercalated material for a certain time in n-butyl alcohol, to obtain nanosheet sol stripped into sheets. The preparation method is simple and environment-friendly and the rare earth oxide (LnO) nanosheet sol can be used as optical glass, ceramic material additives, high-brightness fluorescent powder and other teletron coating for large-screen televisions, and the like.

Description

technical field [0001] The invention relates to the technical field of chemical synthesis materials, in particular to a preparation method of a novel positively charged rare earth oxide nanosheet LnO (Ln=Y / Eu) sol. Background technique [0002] Layered compound is a spatial network structure formed by the accumulation of basic units of a certain structure by sharing corners, edges or faces. It is an important solid functional material. Due to its unique layered structure and interlayer chemical reactivity , so that it has broad application prospects in the fields of heat, mechanics, optics, electricity and magnetism, adsorption, conduction, separation and catalysis. Therefore, the study of layered compounds not only has very important academic value in basic theory, but also has broad practical prospects. As a solid material, layered compounds have many modification methods: physical, chemical, mechanical, chemical, etc. There are different research methods in differen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F17/00B82Y30/00
Inventor 李强张琳史武超涂越崔景慧
Owner EAST CHINA NORMAL UNIV