Preparation for high-efficiency ultrafine TiO2 nanoparticle/graphite phase carbon nitride nanosheet composite photocatalyst

A graphite-phase carbon nitride and composite catalyst technology, which is applied in the field of photocatalytic materials, can solve the problems of not being able to fully utilize sunlight and achieve high-efficiency photocatalytic performance

Inactive Publication Date: 2018-08-03
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore TiO 2 Can't take full advantage of sunlight

Method used

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  • Preparation for high-efficiency ultrafine TiO2 nanoparticle/graphite phase carbon nitride nanosheet composite photocatalyst
  • Preparation for high-efficiency ultrafine TiO2 nanoparticle/graphite phase carbon nitride nanosheet composite photocatalyst
  • Preparation for high-efficiency ultrafine TiO2 nanoparticle/graphite phase carbon nitride nanosheet composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] TiO 2 The preparation method of nanorod / graphitic carbon nitride nanosheet composite catalyst:

[0027] 1. Dissolve 2 ml of 15-20% TiCl 3 aqueous solution and 1 mL of 0.5M SnCl 4 The aqueous solution was added to 60 ml of ethanol, and 90 mg of carbon nitride nanosheets were added to the above solution, ultrasonically dispersed for 30 minutes, then the above solution was transferred to a 100 ml hydrothermal reaction kettle, and placed in a blast oven The temperature was raised to 100° C. and maintained at 100° C. for 4 hours, and then cooled naturally.

[0028] 2. Put the dispersion obtained in step 1 in a centrifuge tube, and remove the supernatant by centrifugation to obtain a solid.

[0029] 3. Add 10 ml of ethanol solution to the solid obtained in step 2, sonicate until completely dispersed, and unreacted TiCl 3 Removal, followed by centrifugation, yielded a solid.

[0030] 4. Dry the solid obtained in step 3 in an oven at 70°C, and dry in the oven to obtain TiO...

Embodiment 2

[0032] Example 2TiO 2 Preparation method of nanoparticle / graphite phase carbon nitride nanosheet composite catalyst:

[0033] 1. Add 2 ml of 15-20wt% TiCl 3 The aqueous solution was added to 60 mL of ethanol and stirred at room temperature for 30 minutes. Then the above solution was transferred to a 100 ml hydrothermal reaction kettle, which was placed in a blast oven and heated to 100° C. and kept at 100° C. for 6 hours, and cooled naturally.

[0034] 2. Put the dispersion obtained in step 1 in a centrifuge tube, and remove the supernatant by centrifugation to obtain a solid.

[0035] 3. Add 10 ml of ethanol solution to the solid obtained in step 2, sonicate until completely dispersed, and unreacted TiCl 3 Removal, followed by centrifugation, yielded a solid.

[0036] 4. Dry the solid obtained in step 3 in an oven at 70°C to obtain TiO 2 The nanoparticle / graphite phase carbon nitride nanosheet composite catalyst powder is about 200 mg.

[0037] image 3 Line 1 in is to...

Embodiment 3

[0039] TiO 2 Preparation method of nanorod / graphite phase carbon nitride nanosheet composite catalyst

[0040] 1. Add 4 ml of 15-20% TiCl 3 aqueous solution and 2 ml of 0.5M SnCl 4 The aqueous solution was added to 60 ml of ethanol, and 120 mg of carbon nitride nanosheets were added to the above solution, ultrasonically dispersed for 30 minutes, then the above solution was transferred to a 100 ml hydrothermal reaction kettle, and placed in a blast oven The temperature was raised to 100° C. and maintained at 100° C. for 4 hours, and then cooled naturally. .

[0041] 2. Put the dispersion obtained in step 1 in a centrifuge tube, and remove the supernatant by centrifugation to obtain a solid.

[0042] 3. Add 10 ml of ethanol solution to the solid obtained in step 2, sonicate until completely dispersed, and unreacted TiCl 3 Removal, followed by centrifugation, yielded a solid.

[0043] 4. Dry the solid obtained in step 3 in an oven at 70°C, and dry in the oven to obtain TiO ...

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Abstract

The invention provides preparation for a high-efficiency ultrafine TiO2 nanoparticle / graphite phase carbon nitride nanosheet composite photocatalyst, and belongs to the technical field of photocatalytic materials. The preparation uses TiCl3 as a titanium source, a graphite phase carbon nitride nanosheet as a carrier and an alcohol as a solvent, a hydrothermal reaction is performed for 1-12 h in ahydrothermal kettle at the temperature of 70-180 DEG C, the obtained ultrafine TiO2 nanoparticles are uniformly supported at the surface of the graphite phase carbon nitride nanosheet, and therefore the composite photocatalyst is formed. The composite photocatalyst provided by the invention has a higher specific surface area and higher photocatalytic activity; and when the photocatalyst is dispersed in sewage or coats a substrate, pollutants in water and air are effectively removed under sunlight, so that the photocatalyst can be used for buildings, indoor walls, vehicle surfaces, glass windows and other carrier surfaces to be used as a self-cleaning coating layer, has better effects on pollutant elimination, indoor air purification and outdoor air purification, and has better antibacterial and sterilized effects.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and in particular relates to a method for preparing a composite photocatalyst of ultrafine titanium dioxide nanoparticles / graphite-phase carbon nitride nanosheets. Background technique [0002] As a semiconductor material, photocatalyst can absorb sunlight and generate photogenerated electrons and holes. Photogenerated electrons have reduction characteristics and react with oxygen molecules to generate superoxide radicals. Photogenerated holes react with water molecules to generate hydroxyl radicals. , and photogenerated holes all have very strong oxidizing ability, collectively referred to as active oxygen radicals. These free radicals have a very strong oxidizing ability, which can oxidize sulfur oxides (SOx), nitrogen oxides (NOx), and volatile organic compounds (VOC) in the air, so that these pollutants can be further oxidized to achieve the purpose of air purification . In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/00B01J35/02
CPCB01J27/24B01J35/004B01J35/023
Inventor 孙再成栾世梁
Owner BEIJING UNIV OF TECH
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