Boron magnesium co-doped VO2 powder, preparation method and application thereof

A VO2 and co-doping technology, which is applied in chemical instruments and methods, nanotechnology, color-changing fluorescent materials, etc., can solve the problem of not being able to obtain VO2 materials with both low phase transition temperature and high visible light transmittance, and reach the phase transition temperature The effect of low, uniform tissue distribution and small particle size

Active Publication Date: 2019-03-22
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a boron-magnesium co-doped VO 2 The powder and its preparation method and application are aimed at solving the problem of VO with low phase transition temperature and high visible light transmittance that cannot be obtained in the prior art. 2 material problem

Method used

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  • Boron magnesium co-doped VO2 powder, preparation method and application thereof
  • Boron magnesium co-doped VO2 powder, preparation method and application thereof
  • Boron magnesium co-doped VO2 powder, preparation method and application thereof

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Effect test

Embodiment 1

[0048] Follow V 0.93 B 0.02 Mg 0.05 o 2 The composition ratio weighs the corresponding amount of 0.546gV 2 o 5 Powder, 0.0186g H 3 BO 3 Powder, 0.0121g MgCO 3 powder; at 80°C, the H 3 BO 3 Powder and MgCO 3 The powder was dissolved in 60ml of 15% H 2 o 2 , stir for 10 minutes until completely dissolved, then add VO while stirring 2 Powder, containing B after violent reaction 3+ and Mg 2+ V 5+ complex hydrogel;

[0049] Weigh 1.1345g H 2 C 2 o 2 2H 2 O, add to the complex hydrosol obtained above, stir well until the blue V is formed 4+ Precursor solution, and continue to react at 80°C for 30 minutes;

[0050] The blue precursor obtained above was transferred to a hydrothermal reaction kettle, and hydrothermally reacted at 200°C for 72 hours. After the reaction was completed, a blue-black precipitate was obtained, which was washed repeatedly by centrifugation, deionized water and absolute ethanol, and heated at 80°C. Vacuum drying to obtain a blue-black pow...

Embodiment 2

[0055] Follow V 0.91 B 0.04 Mg 0.05 o 2 The composition ratio weighs the corresponding amount of 0.546g V 2 o 5 Powder, 0.0372g H 3 BO 3 Powder, 0.0121g MgCO 3 powder; at 80°C, the H 3 BO 3 Powder and MgCO 3 The powder was dissolved in 60ml of 15% H 2 o 2 In the medium, stir for 10 minutes until completely dissolved, then add V while stirring 2 o 5 Powder, containing B after violent reaction 3+ and Mg 2+ V 5+ complex hydrogel;

[0056] Weigh 1.1345g H 2 C 2 o 2 2H 2 O, add to the complex hydrosol obtained above, stir well until the blue V is formed 4+ Precursor solution, and continue to react at 80°C for 30 minutes;

[0057] The blue precursor obtained above was transferred to a hydrothermal reaction kettle, and hydrothermally reacted at 200°C for 72 hours. After the reaction was completed, a blue-black precipitate was obtained, which was washed repeatedly by centrifugation, deionized water and absolute ethanol, and heated at 80°C. Vacuum drying to obtai...

Embodiment 3

[0062] Follow V 0.89 B 0.06 Mg 0.05 o 2 The composition ratio weighs the corresponding amount of 0.546g V 2 o 5 Powder, 0.0558g H 3 BO 3 Powder, 0.0121g MgCO 3 powder; at 80°C, the H 3 BO 3 Powder and MgCO 3 The powder was dissolved in 60ml of 15% H 2 o 2 In the medium, stir for 10 minutes until completely dissolved, then add V while stirring 2 o 5 Powder, containing B after violent reaction 3+ and Mg 2+ V 5+ complex hydrogel;

[0063] Weigh 1.1345g H 2 C 2 o 2 2H 2 O, add to the complex hydrosol obtained above, stir well until the blue V is formed 4+ Precursor solution, and continue to react at 80°C for 30 minutes;

[0064] The blue precursor obtained above was transferred to a hydrothermal reaction kettle, and hydrothermally reacted at 200°C for 72 hours. After the reaction was completed, a blue-black precipitate was obtained, which was washed repeatedly by centrifugation, deionized water and absolute ethanol, and heated at 80°C. Vacuum drying to obtai...

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Abstract

The invention discloses a boron magnesium co-doped VO2 powder, a preparation method and an application thereof. The preparation method comprises the following steps: dissolving a magnesium source anda boron source into hydrogen peroxide, and then adding a vanadium source, thereby preparing a V5+ complex hydrogel containing B3+ and Mg2+; adding a reducing agent into the V5+ complex hydrogel for performing reduction reaction, thereby acquiring a blue V4+ precursor solution; performing hydrothermal reaction on the V4+ precursor solution till generating sediment, cleaning and drying sediment, thereby acquiring an initial VO2 powder; calcining the initial VO2 powder under a protective gas atmosphere, thereby acquiring the boron magnesium co-doped VO2 powder. The invention can solve the problemof the prior art that a VO2 material with both low phase-transition temperature and high visible light transmittance cannot be acquired.

Description

technical field [0001] The invention relates to the technical field of phase change materials, in particular to a boron-magnesium co-doped VO 2 Powder and its preparation method and application. Background technique [0002] Vanadium dioxide (VO 2 ) is a reversible phase change material, which will undergo a reversible phase transition from a low-temperature monoclinic structure insulator phase (M phase) to a high-temperature tetragonal rutile structure metal phase (R phase) near 68 °C, accompanied by electrical, magnetic These characteristics make it have a wide range of application scenarios in the field of thermochromic smart windows. However, its phase transition temperature (t c =68℃) and low visible light transmittance (T lum ) makes its application subject to certain restrictions. A lot of recent research has been devoted to improving VO 2 The visible light transmittance (T lum ), however to obtain both a low phase transition temperature (t c ) and high visibl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/02B82Y40/00C09K9/00
CPCB82Y40/00C01G31/02C01P2004/16C01P2004/45C09K9/00
Inventor 吕维忠周俏婷
Owner SHENZHEN UNIV
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