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WO3/SiO2 composite film prepared based on sol-gel method as well as preparation method and application thereof

A technology of sol-gel method and composite thin film, which is applied in the direction of coating, etc., can solve the problem of few fields of electrochromism, and achieve the effects of short response time, large light modulation range, and simple preparation method

Inactive Publication Date: 2021-08-20
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the combination of different materials can often make up for the shortcomings of a single material, amplify the advantages of the material, and make the performance of the sample better. Common composite materials include TiO 2 , PANI, MoO 3 etc., SiO 2 It has the characteristics of high temperature resistance, chemical corrosion resistance, and environmental friendliness. More studies have shown that doping silicon dioxide in an appropriate amount can improve light transmission and cycle stability. It has a wide range of applications in aerochromism, catalysis and other fields, but It is less in the field of electrochromism

Method used

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  • WO3/SiO2 composite film prepared based on sol-gel method as well as preparation method and application thereof
  • WO3/SiO2 composite film prepared based on sol-gel method as well as preparation method and application thereof
  • WO3/SiO2 composite film prepared based on sol-gel method as well as preparation method and application thereof

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Experimental program
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preparation example Construction

[0025] Further, a kind of WO prepared based on sol-gel method 3 / SiO 2 The preparation method of composite film, concrete operation steps are as follows:

[0026] (2.1), add an appropriate amount of tungsten powder into a three-necked flask, take an appropriate amount of hydrogen peroxide and add it into the three-necked flask through a burette, stir with a magnetic stirrer until the tungsten powder is completely dissolved, and then filter to obtain clarified WO 3 Precursor solution;

[0027] (2.2), the WO to be obtained 3 Put the precursor solution into a three-necked flask, add an appropriate amount of ethyl orthosilicate, stir for a period of time, then add an appropriate amount of ethanol, reflux at 45°C for a period of time, raise the temperature to 80°C, and then add an appropriate amount of pore forming agent, After stirring for a while to get WO 3 sol, will result in WO 3 The sol was cooled to room temperature for use;

[0028] (2.3), the WO to be obtained 3 The...

Embodiment 1

[0038] 1) Weigh 2.5g of tungsten powder at room temperature and place it in a three-necked flask equipped with a constant burette, place the three-necked flask in a water bath filled with ice cubes, use a graduated cylinder to measure 10ml of hydrogen peroxide and place it in a constant burette , add dropwise at a rate of 4 seconds, and stir magnetically for 6 hours. After the tungsten powder completely reacts with hydrogen peroxide, a milky white solution is obtained. Transfer the solution to a vacuum filter funnel, and filter to obtain a clear solution;

[0039] 2), transfer the obtained clear solution to another 150ml three-necked flask equipped with a stirrer, a condenser and a thermometer, weigh 0.5664g ethyl orthosilicate with a measuring cylinder, pour it into a three-necked flask, and stir magnetically for 1h to obtain Precursor solution of the composite film; use a graduated cylinder to measure 15ml of ethanol solution and pour it into a three-necked flask, heat to ref...

Embodiment 2

[0042] 1) Weigh 2.5g of tungsten powder at room temperature and place it in a three-necked flask equipped with a constant burette, place the three-necked flask in a water bath filled with ice cubes, use a graduated cylinder to measure 15ml of hydrogen peroxide and place it in a constant burette , add dropwise at a rate of 4 seconds, and stir magnetically for 6 hours. After the tungsten powder completely reacts with hydrogen peroxide, a milky white solution is obtained. Transfer the solution to a vacuum filter funnel, and filter to obtain a clear solution;

[0043] 2), transfer the obtained clear solution to another 150ml three-necked flask equipped with a stirrer, a condenser and a thermometer, weigh 0.8496g tetraethyl orthosilicate with a measuring cylinder, pour it into a three-necked flask, and stir magnetically for 1h to obtain Precursor solution of the composite film; use a measuring cylinder to measure 15ml of ethanol solution into a three-necked flask, heat to reflux, th...

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Abstract

The invention discloses a WO3 / SiO2 composite film prepared based on a sol-gel method as well as a preparation method and application thereof and belongs to the field of functional composite materials. Tungsten powder and hydrogen peroxide are selected for preparing a WO3 precursor solution; tetraethoxysilane is used as a silicon source, ethyl alcohol is used as a solvent, PEG600 is used as a pore forming agent, a WO3 / SiO2 composite film with a nanopore structure is prepared through the sol-gel method, and the composite film is obtained through high-temperature roasting in the air atmosphere. The composite film has a large light modulation range and transparency; the preparation method is simple, and the price of thecomposite film is low; and the composite film has a good application prospect in the fields of electrochromic intelligent windows and the like.

Description

technical field [0001] The invention belongs to the field of functional composite materials, and relates to a WO prepared based on a sol-gel method 3 / SiO 2 Composite film, its preparation method and application. Background technique [0002] Electrochromic (EC) smart windows are a new type of smart windows that are an attractive alternative to traditional windows, with enormous environmental benefits. The light and shade of the glass can be controlled with very little power, without obstructing visibility like blinds and curtains, smart and energy-saving. At the same time, it can also control the transmittance of sunlight, monitor indoor temperature and lighting, and reduce the operating costs of air conditioners and other electrical appliances. Under constant conditions, its energy consumption is almost zero. This kind of electrochromic device can be used in conjunction with smart home systems and controlled by sensors, so that they can be automatically controlled even ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/34
CPCC03C17/3417C03C2217/23C03C2217/231C03C2218/116C03C2218/32
Inventor 林保平朱思艳孙莹张雪勤杨洪
Owner SOUTHEAST UNIV
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