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Trivalent titanium-titanium dioxide-porphyrin/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, can solve the problems of slow charge conduction rate and achieve effective separation and excellent visible light effect

Inactive Publication Date: 2019-03-19
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Studies have shown that ion doping and semiconductor recombination can improve the photocatalytic performance of titanium dioxide to a certain extent, but ion doping is easy to introduce photogenerated electron-hole recombination centers, and semiconductor recombination often has a slow charge conduction rate. and other shortcomings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (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.

[0028] (2) Dissolve 7g of sodium dodecylbenzenesulfonate in a mixed solution of 36mL of n-hexane, 6mL of n-pentanol and 4mL of deionized water, stir evenly until completely dissolved, then add 1mL of titanium trichloride (commercially available mass fraction 20% titanium trichloride solution) was dissolved evenly, and the resulting mixed solution was transferred to the lining of the hydrothermal reaction kettle. After the reaction kettle was sealed, it was placed in an oven at 180° C. for 4 hours for hydrothermal reaction. After the reaction, the obtained product was repeatedly washed with ethanol and deionized water, filtered and dried at 60°C for 24 hours to obtain Ti 3+ -TiO 2 Mi...

Embodiment 2

[0033] (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.

[0034] (2) Dissolve 7g of sodium dodecylbenzenesulfonate in a mixed solution of 36mL of n-hexane, 6mL of n-pentanol and 4mL of deionized water, stir evenly until completely dissolved, then add 1mL of titanium trichloride (commercially available mass fraction 20% titanium trichloride solution) was dissolved evenly, and the resulting mixed solution was transferred to the lining of the hydrothermal reaction kettle. After the reaction kettle was sealed, it was placed in an oven at 180° C. for 4 hours for hydrothermal reaction. After the reaction, the obtained product was repeatedly washed with ethanol and deionized water, filtered and dried at 60°C for 24 hours to obtain Ti 3+ -TiO 2 Mi...

Embodiment 3

[0039] (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.

[0040] (2) Dissolve 7g of sodium dodecylbenzenesulfonate in a mixed solution of 36mL of n-hexane, 6mL of n-pentanol and 4mL of deionized water, stir evenly until completely dissolved, then add 3mL of titanium trichloride (commercially available mass fraction 20% titanium trichloride solution) was dissolved evenly, and the resulting mixed solution was transferred to the lining of the hydrothermal reaction kettle. After the reaction kettle was sealed, it was placed in an oven at 180° C. for 4 hours for hydrothermal reaction. After the reaction, the obtained product was repeatedly washed with ethanol and deionized water, filtered and dried at 60°C for 24 hours to obtain ...

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Abstract

The invention belongs to the field of photocatalytic material and discloses a trivalent titanium-titanium dioxide-porphyrin / carbon nitride composite photocatalyst and a preparation method thereof. Thepreparation method comprises the following steps: dissolving a surfactant into a mixed solution of alkane, alcohol and water by mixing, and then adding titanium trichloride into the mixture to perform hydrothermal reaction at a temperature ranging from 150 to 180 DEG C, thereby obtaining trivalent titanium doped titanium dioxide microspheres; ultrasonically dispersing carbon nitride nanosheets into ethyl alcohol, adding a tetraphenylporphyrin solution to perform reaction, thereby obtaining porphyrin-sensitized carbon nitride; and ultrasonically dispersing trivalent titanium doped titanium dioxide microspheres and porphyrin-sensitized carbon nitride into water, performing reaction at a temperature ranging from 60 to 90 DEG C, thereby obtaining trivalent titanium-titanium dioxide-porphyrin / carbon nitride composite photocatalyst. The preparation method provided by the invention is simple, the cost is low, and the controllability is strong, and the prepared composite photocatalyst has anexcellent photocatalytic degradation performance.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials, in particular to a trivalent titanium-titanium dioxide-porphyrin / carbon nitride composite photocatalyst and a preparation method thereof. Background technique [0002] Economic growth and social progress are inseparable from the rapid development of industry, but the damage to the ecological environment brought about by industrial development is becoming increasingly serious. Among them, industrial wastewater contains a variety of organic pollutants, which are highly toxic and difficult to treat. If they are not properly treated and discharged into the environment, they will pollute water bodies and soil, and pose a great threat to human life and health. Therefore, how to deal with organic wastewater has received extensive attention. Compared with traditional physical and chemical degradation methods, photocatalytic degradation has broad application prospects due to its advantages of dire...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38
CPCB01J31/38B01J35/39
Inventor 黄洪董志勇徐佳杰司徒粤
Owner SOUTH CHINA UNIV OF TECH
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