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A kind of titanium dioxide-iron-carbon nitride composite photocatalyst and preparation method thereof

A technology of titanium dioxide and carbon nitride, which is applied in the field of photocatalytic materials to achieve excellent visible light effects

Active Publication Date: 2021-08-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, there is no report on the ternary photocatalyst obtained by combining titanium dioxide with iron and carbon nitride.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Take 5g of melamine and place it in a muffle furnace, heat up to 550°C for 4 hours at a heating rate of 1°C / min and calcinate for 4 hours, grind the resulting solid into fine powder, then heat up to 500°C at a heating rate of 5°C / min ℃ for 2 hours to obtain carbon nitride nanosheets, which were dispersed in deionized water to obtain a carbon nitride dispersion.

[0026] (2) Take 4mL of tetrabutyl titanate, 60mL of absolute ethanol, 0.26ml of 98% mass fraction of concentrated sulfuric acid and 0.24mL of deionized water and stir evenly, then transfer to the lining of the hydrothermal reaction kettle, seal the reaction kettle, place The hydrothermal reaction was carried out in an oven at 180° C. for 4 hours. After the reaction, the obtained product was repeatedly washed with ethanol and deionized water, filtered and then dried to obtain titanium dioxide microspheres.

[0027] (3) Take 0.3g of titanium dioxide microspheres and ultrasonically disperse them in 30mL of de...

Embodiment 2

[0031] (1) Take 5g of melamine and place it in a muffle furnace, heat up to 550°C for 4 hours at a heating rate of 1°C / min and calcinate for 4 hours, grind the resulting solid into fine powder, then heat up to 500°C at a heating rate of 5°C / min ℃ for 2 hours to obtain carbon nitride nanosheets, which were dispersed in deionized water to obtain a carbon nitride dispersion.

[0032] (2) Take 4mL of tetrabutyl titanate, 60mL of absolute ethanol, 0.26ml of 98% mass fraction of concentrated sulfuric acid and 0.24mL of deionized water and stir evenly, then transfer to the lining of the hydrothermal reaction kettle, seal the reaction kettle, place The hydrothermal reaction was carried out in an oven at 180° C. for 4 hours. After the reaction, the obtained product was repeatedly washed with ethanol and deionized water, filtered and then dried to obtain titanium dioxide microspheres.

[0033] (3) Ultrasonically disperse 0.3g of titanium dioxide microspheres in 30mL of deionized water,...

Embodiment 3

[0036] (1) Take 5g of melamine and place it in a muffle furnace, heat up to 600°C for 3 hours at a heating rate of 2°C / min and calcinate for 3 hours, grind the resulting solid into a fine powder, then raise the temperature to 450°C at a heating rate of 10°C / min ℃ for 3 hours to obtain carbon nitride nanosheets, which were dispersed in deionized water to obtain a carbon nitride dispersion.

[0037] (2) Take 4mL of tetrabutyl titanate, 60mL of absolute ethanol, 0.26ml of 98% mass fraction of concentrated sulfuric acid and 0.24mL of deionized water and stir evenly, then transfer to the lining of the hydrothermal reaction kettle, seal the reaction kettle, place The hydrothermal reaction was carried out in an oven at 180° C. for 4 hours. After the reaction, the obtained product was repeatedly washed with ethanol and deionized water, filtered and dried to obtain titanium dioxide microspheres;

[0038] (3) Take 0.3g of titanium dioxide microspheres and ultrasonically disperse them i...

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PUM

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Abstract

The invention belongs to the field of photocatalytic materials, and discloses a titanium dioxide-iron-carbon nitride composite photocatalyst and a preparation method thereof. Ultrasonically disperse titanium dioxide in water, then add ferric chloride solution and heat to 60-90°C for reaction, then add carbon nitride aqueous dispersion to continue the reaction, the solid product is separated, washed and dried to obtain titanium dioxide-iron-carbon nitride composite light catalyst. In the present invention, iron ions are deposited on the surface of titanium dioxide microspheres by a surface deposition method, and then compounded with carbon nitride to obtain TiO 2 -Fe-C 3 N 4 The ternary photocatalyst has excellent visible light effect, realizes the effective separation of photogenerated electron-hole pairs, and makes full use of the strong oxidizing holes on the valence band of titanium dioxide, which has great significance in the field of photocatalytic degradation.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials, and in particular relates to a titanium dioxide-iron-carbon nitride composite photocatalyst and a preparation method thereof. Background technique [0002] In recent decades, global environmental issues have received more and more attention along with the theme of sustainable development. Among many methods to solve environmental pollution, the method of using photocatalyst to degrade pollutants is considered to be one of the ideal solutions because it can utilize sunlight and will not produce secondary pollution during the purification process. For this reason, people have been devoting themselves to researching and exploring various semiconductors as photocatalysts. Among many photocatalysts, titanium dioxide plays an important role in environmental purification due to its non-toxic, non-polluting, hygienic and safe, and good photochemical stability. However, titanium dioxide has a lar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24
CPCB01J27/24B01J35/39
Inventor 黄洪董志勇徐佳杰司徒粤
Owner SOUTH CHINA UNIV OF TECH
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