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Preparation method and application of g-C3N4 (101)-(001)-TiO2 composite material

A composite material, g-c3n4 technology, applied in the field of preparation of g-C3N4/--TiO2 composite materials, can solve the problems of limited photocatalytic performance, poor electronic conductivity, small specific surface area, etc., and achieve a simple and easy-to-control preparation method, The effect of improving catalytic ability and improving conductivity

Active Publication Date: 2021-01-05
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, simple g-C 3 N 4 The material does not respond well to visible light, and has shortcomings such as small specific surface area, fast recombination speed of photogenerated electron-hole pairs, and poor electronic conductivity, which limit its photocatalytic performance.

Method used

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  • Preparation method and application of g-C3N4 (101)-(001)-TiO2 composite material
  • Preparation method and application of g-C3N4 (101)-(001)-TiO2 composite material
  • Preparation method and application of g-C3N4 (101)-(001)-TiO2 composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1g-C 3 N 4 Powder Preparation Method

[0035] Weigh a certain amount of urea into a porcelain crucible with a cover, place it in a blast drying oven until the urea is completely dry, then move it to a muffle furnace, and raise the temperature to 550°C at a heating rate of 5°C / min. And kept for 3h, finally got the light yellow g-C 3 N 4 powder.

Embodiment 2

[0036] Example 2(101)-(001)-TiO 2 preparation method

[0037] Under the condition of stirring, measure 2.5mL of tetrabutyl titanate solution and slowly add it into 100mL of polytetrafluoroethylene lined with 30mL of absolute ethanol. After the solution is stirred evenly (30min), measure 0.3mL A hydrofluoric acid solution with a concentration of 40% was slowly added to the above solution, and stirring was continued for 30 min. Then the autoclave was transferred to a blast drying oven, and the heating was continued at 180° C. for 12 h. After the sample was cooled to room temperature, it was centrifuged, washed with absolute ethanol and deionized water, and dried to collect the solid. The solid was then ground into a powder and put into a crucible with a cover and placed in a muffle furnace. At a heating rate of 5°C / min, it was raised to 550°C and kept for 2h for annealing to obtain the final sample (101)-(001)-TiO 2 .

Embodiment 3

[0038] Example 3g-C 3 N 4 / (101)-(001)-TiO 2 Preparation method of composite material

[0039] The g-C of the embodiment 1 gained of taking 1.15g 3 N 4 Add the powder into a 100mL polytetrafluoroethylene liner containing 30mL of absolute ethanol and continue to stir for 1h. After the solution is evenly mixed, measure 2.5mL of tetrabutyl titanate solution and slowly add it to the solution, and continue to stir for 30min. , and then measure 0.3 mL of hydrofluoric acid (40%) solution and slowly add it into the above mixed solution, and stir for 30 min until a uniform solution is formed. Then the autoclave was transferred to a blast drying oven, and the heating was continued at 180° C. for 12 h. After the sample was cooled to room temperature, it was centrifuged, washed with absolute ethanol and deionized water, and dried to collect the solid. The solid was then ground into a powder and put into a crucible with a cover and placed in a muffle furnace. At a heating rate of 5°...

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Abstract

The invention discloses a preparation method and application of a g-C3N4 / (101)-(001)-TiO2 composite material. The preparation method is simple and easy to control, a synthesized g-C3N4 / (101)-(001)-TiO2 composite photocatalytic system takes carbon nitride as a main body, and TiO2 containing surface heterojunction as an object. The conduction capability of electrons between interfaces is improved, the separation of photo-induced electron hole pairs is promoted, and the catalytic capability under visible light is improved. The composite material not only makes up the defects of g-C3N4, but also accelerates the transfer of photo-induced electron hole pairs on the interface of g-C3N4 and (101)-(001)-TiO2, and can effectively catalyze and degrade paracetamol and methylene blue under visible light.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, in particular to a g-C 3 N 4 / (101)-(001)-TiO 2 Preparation methods and applications of composite materials. Background technique [0002] Solar-driven semiconductor photocatalysis technology has attracted widespread attention because of its low cost, effective degradation of pollutants in the environment, and no re-pollution to the environment. It can well deal with environmental problems and resource shortages. Studies have shown that graphitic carbon nitride with a band gap of 2.7eV (g-C 3 N 4 ) is an ideal photocatalyst, which has the advantages of no heavy metals, good chemical and thermal stability, wide source of raw materials, easy preparation, low synthesis cost and sensitivity to visible light. 2 It has been well applied in reducing and degrading toxic organic pollutants, and has attracted widespread attention worldwide. However, simple g-C 3 N 4 The mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J21/06B01J37/08B01J37/10C02F1/30C02F101/30C02F101/34C02F101/36C02F101/38
CPCB01J27/24B01J21/063B01J37/082B01J37/10C02F1/30C02F2101/345C02F2101/38C02F2101/40C02F2101/36C02F2101/308C02F2305/10B01J35/39Y02W10/37
Inventor 孙静孙晶晶孟霞王西奎
Owner QILU UNIV OF TECH
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