Fluorine-doped titanium dioxide nano powder with transparent and near-infrared shielding functions

A technology of titanium dioxide and nano-powder, which is applied in the field of titanium dioxide nano-powder materials and fluorine-doped titanium dioxide nano-powder, which can solve the problems of high transmittance, low ion doping amount, and inability to guarantee, and achieve free electron concentration Improvement, simple preparation method, good barrier properties

Active Publication Date: 2021-07-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of human society in the 21st century, considerable progress has been made in both science and technology and humanities, but the problem of lack of contemporary resources has become increasingly prominent and has become a bottleneck restricting social development
In particular, this technology uses the sol-gel method to prepare fluorine-doped titanium dioxide, which has problems such as low ion doping amount and poor film-forming dispersion. Therefore, the concentration of free electrons in titanium dioxide is low, and high transmission in the visible light region cannot be guaranteed. rate, it is difficult to form plasmon resonance absorption in the near-infrared light region to shield near-infrared light, and it cannot reduce the indoor temperature when applied to architectural glass

Method used

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  • Fluorine-doped titanium dioxide nano powder with transparent and near-infrared shielding functions
  • Fluorine-doped titanium dioxide nano powder with transparent and near-infrared shielding functions
  • Fluorine-doped titanium dioxide nano powder with transparent and near-infrared shielding functions

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Embodiment 1

[0043] A method for preparing a fluorine-doped titanium dioxide nanopowder with both transparency and near-infrared shielding functions, comprising the following steps:

[0044] 1) Weigh 30mmol of stearyl alcohol, 3mmol of tetraethyl titanate, and 0.6mmol of ammonium fluoride into a 150ml three-necked flask, then add 1.5ml of oleylamine and oleic acid, and 24ml of octadecene to the three-necked flask;

[0045] 2) Put the three-necked flask into a heat-collecting constant temperature heating magnetic stirrer to heat and stir in an oil bath, and nitrogen gas is introduced during the heating process; on the one hand, nitrogen gas is used to create an inert atmosphere for easy doping, and on the other hand, it is used as a protective gas. Prevent organic matter from burning at high temperatures.

[0046] 3) When the temperature rises to 120°C, turn off the nitrogen gas, maintain the temperature at 120°C, and perform vacuum degassing for 20 minutes;

[0047] 4) After the degassing...

Embodiment 2

[0050] A method for preparing a fluorine-doped titanium dioxide nanopowder with both transparency and near-infrared shielding functions, comprising the following steps:

[0051] 1) Weigh 30mmol of stearyl alcohol, 3mmol of tetraethyl titanate, and 0.9mmol of ammonium fluoride into a 150ml three-necked flask, then add 1.5ml of oleylamine and oleic acid, and 24ml of octadecene to the three-necked flask;

[0052] 2) Put the three-necked flask into a heat-collecting constant temperature heating magnetic stirrer to heat and stir in an oil bath, and nitrogen gas is introduced during the heating process;

[0053] 3) When the temperature rises to 120°C, turn off the nitrogen gas, maintain the temperature at 120°C, and perform vacuum degassing treatment for 30 minutes;

[0054] 4) After the degassing is completed, continue to feed nitrogen, and raise the temperature to 280° C. for 60 minutes. After the reaction is over, cool the reactant to 60°C, first add 50ml of acetone and mix well...

Embodiment 3

[0057] A method for preparing a fluorine-doped titanium dioxide nanopowder with both transparency and near-infrared shielding functions, comprising the following steps:

[0058] 1) Weigh 30mmol of stearyl alcohol, 3mmol of tetraethyl titanate, and 1.2mmol of ammonium fluoride into a 150ml three-necked flask, then add 1.5ml of oleylamine and oleic acid, and 24ml of octadecene to the three-necked flask;

[0059] 3) Put the three-necked flask into a heat-collecting constant temperature heating magnetic stirrer to heat and stir in an oil bath, and nitrogen gas is introduced during the heating process;

[0060] 3) When the temperature rises to 120°C, turn off the nitrogen gas, maintain the temperature at 120°C, and perform vacuum degassing treatment for 30 minutes;

[0061] 4) After the degassing is completed, continue to feed nitrogen, and raise the temperature to 280° C. for 60 minutes. After the reaction is over, cool the reactant to 60°C, first add 50ml of acetone and mix well...

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Abstract

The invention discloses fluorine-doped titanium dioxide nano powder with a transparent function and a near-infrared shielding function. The preparation method comprises the following steps: mixing oleylamine, oleic acid, 1-octadecene, octadecanol, a titanium source and a fluorine source, heating and uniformly stirring in a nitrogen atmosphere, degassing, raising the temperature to 260-320 DEG C, and keeping the temperature for 0.5-2 hours; and cooling, washing and drying the reaction product. After the fluorine-doped titanium dioxide nano powder forms a film, the light transmittance is greater than 90%, and the near-infrared rejection rate is 17%-43%. According to the invention, titanium dioxide has near-infrared barrier property on the premise of ensuring high visible light transmittance, the absorbance of the product in a near-infrared light area is enhanced along with the increase of the use amount of the fluorine source, and the absorption of the titanium dioxide nano-powder to near-infrared light can be changed by adjusting the F-doping amount; the prepared transparent heat-insulating film has high transmittance in a visible light region and good barrier property in a near-infrared light region, and has good application value in the aspect of transparent heat-insulating coatings.

Description

technical field [0001] The invention relates to a titanium dioxide nanometer powder material, in particular to a fluorine-doped titanium dioxide nanometer powder with both transparency and near-infrared shielding functions, and belongs to the technical field of building energy conservation. Background technique [0002] With the rapid development of human society in the 21st century, great progress has been made in both science and technology and humanities, but the problem of scarcity of contemporary resources has become increasingly prominent and has become a bottleneck restricting social development. Especially in the southern part of our country, the summer is often hot for a long time, and people have a great demand for air conditioning and cooling, which leads to rising electricity consumption, high energy consumption, and the urban heat island effect is also intensifying. Sustainable development has become the path that contemporary society must choose. Building energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82Y30/00B82Y40/00
CPCC01G23/053B82Y30/00B82Y40/00C01P2002/72C01P2004/04C01P2004/64C01P2006/60
Inventor 高强吴笑梅王东明
Owner SOUTH CHINA UNIV OF TECH
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