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Photocatalytic material, and preparation method and application thereof

A photocatalytic material, g-c3n4 technology, applied in chemical instruments and methods, applications, soil conditioning materials, etc., can solve the problem of high photo-generated electron-hole pair recombination rate, unsatisfactory visible light photocatalytic activity, and low solar energy utilization. and other problems, to achieve the effect of increasing the photoresponse range, improving the photocatalytic degradation reaction activity, and having a good application prospect.

Active Publication Date: 2016-05-25
YONKER ENVIRONMENTAL PROTECTION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its bandgap width is large, and it can only absorb less than 5% of the ultraviolet light in the solar energy, making its utilization rate of solar energy low. Therefore, exploring how to efficiently use sunlight is currently a research hotspot for scientific researchers. Including metal or non-metal ion doping of photocatalytic materials or semiconductor compounding with semiconductor photocatalytic materials that respond to visible light, etc.
Despite strong absorption in the visible region, the pure phase g-C 3 N 4 Due to the disadvantages of poor electrical conductivity, small specific surface area, and high photogenerated electron-hole pair recombination rate, its visible light photocatalytic activity is not ideal. Therefore, researchers have modified it to improve its photocatalytic performance.

Method used

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  • Photocatalytic material, and preparation method and application thereof
  • Photocatalytic material, and preparation method and application thereof
  • Photocatalytic material, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] g-C with visible light response 3 N 4 / Ti 3+ -TiO 2 The preparation method of / montmorillonite composite photocatalytic material, it comprises the steps:

[0044] 1) Weigh 20g of urea powder into an alumina crucible, cover it with a lid, and place it in a muffle furnace. Then it was heated to 520° C. at a heating rate of 5° C. / min for 4 hours. When the temperature dropped to room temperature, it was taken out to obtain light yellow g-C 3 N 4 powder;

[0045] 2) Add 25ml TiCl to a reaction kettle with a volume of 100ml 3 solution (commercially available, mass fraction 16-18%, the same below) and 15ml of deionized water, then add 3.5ml of HF solution (40wt%) dropwise, after stirring at room temperature for 15min, seal the reaction kettle and transfer it to a constant temperature blasting In a drying oven, keep it at 200°C for 12 hours. After it cools down naturally, take out the precipitate in the reaction kettle and centrifuge it. After washing with deionized wate...

Embodiment 2

[0052] g-C with visible light response 3 N 4 / Ti 3+ -TiO 2 The preparation method of / montmorillonite composite photocatalytic material, it comprises the steps:

[0053] 1) Weigh 20g of urea powder into an alumina crucible, cover it with a lid, and place it in a muffle furnace. Then it was heated to 520° C. at a heating rate of 5° C. / min for 4 hours. When the temperature dropped to room temperature, it was taken out to obtain light yellow g-C 3 N 4 powder;

[0054] 2) Add 25ml TiCl to a reaction kettle with a volume of 100ml 3 solution and 15ml of deionized water, and then add 3.5ml of HF solution (40wt%) dropwise, after stirring at room temperature for 15min, seal the reaction kettle and transfer it to a constant temperature blast drying oven, keep it at 200°C for 12h, and wait for After natural cooling, take out the precipitate in the reaction kettle and centrifuge, wash with deionized water for 3 times, dissolve in 10ml absolute ethanol solution, and add it dropwise ...

Embodiment 3

[0058] g-C with visible light photocatalytic activity 3 N 4 / Ti 3+ -TiO 2 The preparation method of / montmorillonite composite photocatalytic material, it comprises the steps:

[0059] 1) Weigh 20g of urea powder into an alumina crucible, cover it with a lid, and place it in a muffle furnace. Then it was heated to 520° C. at a heating rate of 5° C. / min for 4 hours. When the temperature dropped to room temperature, it was taken out to obtain light yellow g-C 3 N 4 powder;

[0060] 2) Add 25ml of TiCl3 solution and 15ml of deionized water to a reaction kettle with a volume of 100ml, then add 3.5ml of HF solution (40wt%) dropwise, stir at room temperature for 15min, seal the reaction kettle and transfer it to a constant temperature blast drying oven Keep it at 200°C for 12 hours, take out the precipitate in the reactor after it cools naturally, and centrifuge it, wash it with deionized water for 3 times, dissolve it in 10ml of absolute ethanol solution, and add it dropwise ...

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Abstract

The present invention discloses a photocatalytic material, and a preparation method and application thereof. The preparation method is as below: adding a g-C3N4 powder and a Ti<3+>-TiO2 / montmorillonite powder to anhydrous ethanol, treating by ultrasonic for 4-8h to load the g-C3N4 onto Ti<3+>-TiO2 / montmorillonite, then centrifuging to a precipitate, and drying the precipitate to obtain a g-C3N4 / Ti<3+>-TiO2 / montmorillonite photocatalytic material. The g-C3N4 powder accounts for 2-10 wt.% of the Ti<3+>-TiO2 / montmorillonite powder. The method can degrade organic pollutants in soil in visible light, and effectively overcome the shortcomings of low utilization of sunlight of a traditional photocatalyst TiO2; g-C3N4 and Ti3<+>-TiO2 with visible light response range and sodium montmorillonite with high absorption properties are compounded to increase the response range and light absorption properties of the catalyst, thus effectively improving the photocatalytic degradation reactivity. The invention provides a broad prospect for treating poisonous, harmful and degradation-resistant organic pollutants in soil.

Description

technical field [0001] The invention relates to a photocatalytic material, a preparation method and its application, in particular to a g-C with good photocatalytic activity for remediation of organic polluted soil 3 N 4 / Ti 3+ -TiO 2 / montmorillonite composite photocatalytic material. Background technique [0002] Photocatalytic technology is an environmentally friendly technology, traditional photocatalytic materials such as TiO 2 、 Bi 2 o 3 Due to its good photocatalytic activity and photocatalytic stability, it has attracted widespread attention. However, its bandgap width is large, and it can only absorb less than 5% of the ultraviolet light in the solar energy, making its utilization rate of solar energy low. Therefore, exploring how to efficiently use sunlight is currently a research hotspot for scientific researchers. Including doping photocatalytic materials with metal or non-metal ions or semiconductor recombination with visible light-responsive semiconducto...

Claims

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Application Information

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IPC IPC(8): B01J27/24C09K17/08
CPCC09K17/08B01J27/24B01J35/39
Inventor 贺前锋卢丹刘代欢李学钊刘晨李鹏祥
Owner YONKER ENVIRONMENTAL PROTECTION
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