Preparation method of g-C3N4/MXene composite material

A composite material, g-c3n4 technology, applied in the field of nano functional material preparation, to achieve the effects of easy control of process parameters, good photocatalytic performance, and improved separation efficiency

Inactive Publication Date: 2018-09-07
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, regarding g-C 3 N 4 Compounding with MXene has not been reported

Method used

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  • Preparation method of g-C3N4/MXene composite material
  • Preparation method of g-C3N4/MXene composite material
  • Preparation method of g-C3N4/MXene composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Ti with a purity greater than 98% 3 AlC 2 The ceramic powder was added to 40% HF solution at a ratio of 0.06g / ml, stirred at 60°C for 24 hours; then washed with deionized water until the pH was 6-7, and the obtained solid sample was vacuum-dried at 60°C ; The dried powder is placed in 0.05g / ml urea aqueous solution (Ti 3 AlC 2 The mass ratio of urea to urea is 1:1), stirred at 60°C for 24h; then washed with deionized water for 2 to 3 times, and the obtained solid sample was vacuum-dried at 60°C to obtain a two-dimensional layered structure Ti 3 C 2 (MXene material).

[0029](2) Add 2g of thiourea to 20ml of water, stir at 60°C for 2h, then add 0.1g of the MXene material in step (1), and continue stirring for 10h; then dry it by freeze-drying to obtain MXene and g-C 3 N 4 The mixture of precursor substances is placed in a tube furnace for calcination treatment under an argon atmosphere. The calcination temperature is 600°C, the calcination time is 1h, and the ...

Embodiment 2

[0034] (1) Ti with a purity greater than 98% 2 AlC ceramic powder is added to 40% HF solution at a proportioning concentration of 0.01g / ml, stirred at 20°C for 30h; then washed with deionized water until the pH is 6-7, and the obtained solid sample is vacuumed at 20°C Drying; place the dried powder in 0.05g / ml aqueous urea (Ti 2 The mass ratio of AlC to urea is 1:1), stirred at 20°C for 24h; then washed with deionized water for 2 to 3 times, and the obtained solid sample was vacuum-dried at 20°C to obtain a two-dimensional layered structure Ti 2 C (MXene material).

[0035] (2) Add 2 g of melamine to 20 ml of water, stir at 20°C for 2 h, then add 20 mg of the MXene material in step (1), and continue stirring for 24 h; then dry it by freeze-drying to obtain MXene and g-C 3 N 4 The mixture of precursor substances is placed in a tube furnace for calcination under an argon atmosphere. The calcination temperature is 500°C, the calcination time is 10h, and the heating rate is 10...

Embodiment 3

[0038] (1) Ti with a purity greater than 98% 2 AlC ceramic powder is added to 40% HF solution at a proportioning concentration of 0.01g / ml, stirred at 20°C for 30h; then washed with deionized water until the pH is 6-7, and the obtained solid sample is vacuumed at 20°C Drying; place the dried powder in 0.05g / ml aqueous urea (Ti 2 The mass ratio of AlC to urea is 1:1), stirred at 20°C for 24h; then washed with deionized water for 2 to 3 times, and the obtained solid sample was vacuum-dried at 20°C to obtain a two-dimensional layered structure Ti 2 C (MXene material).

[0039] (2) Add 10g of melamine into 20ml of water, stir at 50°C for 1.5h, then add 3g of the MXene material in step (1), and continue stirring for 10h; then dry it by freeze-drying to obtain MXene and g-C 3 N 4 The mixture of precursor substances is placed in a tube furnace for calcination in an air atmosphere. The calcination temperature is 550°C, the calcination time is 2h, and the heating rate is 10°C / min, ...

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Abstract

The invention relates to a preparation method of a g-C3N4 / MXene composite material. The preparation method comprises the following steps of preparing an MXene material, preparing a mixture of MXene and g-C3N4 precursor matters, and preparing the g-C3N4 / MXene composite material. The preparation method has the advantages that the preparation method is simple, the technology parameters are easy to control, the cost is low, and the large-scale industrialized production is easy to implement; the prepared g-C3N4 / MXene composite material has good crystallizing property, fine particles, uniform distribution, large specific surface area, good conductivity, good photocatalysis property, good biophile property, and application value in the fields of photocatalysis, wastewater treatment, biological sensors and the like.

Description

technical field [0001] The invention belongs to the field of preparation of nano functional materials, in particular to a g-C 3 N 4 / MXene composites preparation method. Background technique [0002] Semiconductor photocatalysis has shown great potential in solving energy shortage and environmental pollution, and has been highly valued by governments of all countries. Therefore, the development of new and efficient photocatalysts has become an inevitable demand for the development of photocatalytic technology. [0003] In recent years, a new type of non-metallic material g-C 3 N 4 , has received extensive attention due to its narrow band gap (about 2.7eV), good chemical stability, and simple preparation method. So far, no naturally occurring g-C has been found in nature 3 N 4 Crystal, g-C 3 N 4 Mainly rely on experimental synthesis, synthetic g-C 3 N 4 Precursors generally use nitrogen-rich compounds such as urea, thiourea, cyanamide, melamine, etc. But the synth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/00B01J35/02B01J37/08
CPCB01J27/22B01J27/24B01J35/0006B01J35/0033B01J35/004B01J35/023B01J37/08B01J37/082
Inventor 张青红韩鑫王宏志李耀刚侯成义
Owner DONGHUA UNIV
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