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Visible light photocatalytic material with 3D porous structure as well as preparation method and application of visible light photocatalytic material

A technology of photocatalytic materials and porous structures, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of uneven pores and low synthesis costs, and achieve accelerated adsorption efficiency and preparation methods Simple, the effect of improving the degradation ability of visible light

Pending Publication Date: 2022-03-08
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The soft template method often uses polymers to fill carbon nitride. During the preparation process, under the influence of high temperature, the filler decomposes to form channels. This method is easy to operate and the synthesis cost is low, but the synthesized channels are not uniform.

Method used

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  • Visible light photocatalytic material with 3D porous structure as well as preparation method and application of visible light photocatalytic material
  • Visible light photocatalytic material with 3D porous structure as well as preparation method and application of visible light photocatalytic material
  • Visible light photocatalytic material with 3D porous structure as well as preparation method and application of visible light photocatalytic material

Examples

Experimental program
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preparation example Construction

[0030] The invention provides a preparation method of a 3D porous structure visible light photocatalytic material, comprising the following steps:

[0031] (1) Dissolving nitrogen and carbon sources, an appropriate amount of magnesium ions and zinc ions in deionized water, adding an appropriate amount of soft template material, then boiling and evaporating the resulting solution, and grinding the dried sample into powder;

[0032] (2) Place the obtained powder in a muffle furnace for calcination, keep it warm, and cool it down to room temperature to obtain the visible light photocatalytic material with a 3D porous structure.

[0033] Wherein, the nitrogen and carbon source is any one of urea, melamine or thiourea.

[0034] The magnesium ion can be provided by any one of magnesium chloride, magnesium sulfate, magnesium acetate or magnesium nitrate, and the zinc ion can be provided by any one of zinc chloride, zinc sulfate, zinc acetate or zinc nitrate.

[0035] The soft templa...

Embodiment 1

[0043] This example provides a method for preparing a visible light photocatalytic material with a 3D porous structure, using urea as a precursor to prepare carbon nitride by thermal polymerization. The total metal addition amount of magnesium and zinc is 3% of the mass of the nitrogen and carbon source, and the ratio of Mg:Zn is 15:1. Specifically, the preparation method of the 3D porous structure visible light photocatalytic material comprises the following steps:

[0044](1) 20g of urea, 200mg of magnesium chloride and 4.5mg of zinc chloride were dissolved in 150ml of deionized water, and 0.3g of cetyltrimethylammonium bromide (CTAB) was added thereto, then the resulting solution was boiled and evaporated to obtain Yellow crystal block, scrape out the yellow crystal block with a medicine spoon, and grind it into a non-grainy powder in a mortar;

[0045] (2) Place the obtained powder in a muffle furnace, heat it to 550°C at a heating rate of 5°C / min for calcination for 3 ho...

Embodiment 2

[0047] This example provides a method for preparing a visible light photocatalytic material with a 3D porous structure, using urea as a precursor to prepare carbon nitride by thermal polymerization. Specifically, the preparation method of the 3D porous structure visible light photocatalytic material comprises the following steps:

[0048] (1) 20g of urea, 200mg of magnesium chloride and 7mg of zinc chloride were dissolved in 150ml of deionized water, and 0.3g of cetyltrimethylammonium bromide (CTAB) was added thereto, then the resulting solution was boiled and evaporated to obtain yellow Crystal block, scrape out the yellow crystal block with a medicine spoon, and grind it into a non-grainy powder in a mortar;

[0049] (2) Place the obtained powder in a muffle furnace, heat it to 550°C at a heating rate of 5°C / min for calcination for 3 hours, keep it at 550°C for 3 hours after calcination, and then cool to room temperature to obtain a yellow solid, That is, the 3D porous stru...

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Abstract

The invention discloses a 3D porous structure visible light photocatalytic material and a preparation method and application thereof.A soft template mode is adopted, Mg and Zn are doped in carbon nitride at the same time in a one-step calcination thermal polymerization mode, and a soft template material is adopted for activation, so that a large number of holes are formed in the surface of the material; according to the present invention, with the confinement effect, the adsorption efficiency on the environmental pollutants is accelerated, the recombination efficiency of the photo-induced carrier is reduced due to the existence of the confinement effect, and the visible light degradation ability is improved while the adsorbability is improved so as to improve the degradation ability on the environmental pollutants. The preparation method is simple, the used materials are low in price, safe and environment-friendly, the performance of adsorbing and reducing tetracycline and methylene blue under the visible light condition is excellent, the visible light catalysis efficiency is high, and the potential of large-scale production and industrial application is achieved.

Description

technical field [0001] The invention relates to the technical field of visible light photocatalytic materials, in particular to a visible light photocatalytic material with a 3D porous structure and a preparation method and application thereof. Background technique [0002] Currently, carbon nitride (g-C 3 N 4 ) due to its good stability, moderate bandgap width (about 2.7eV), and easy modification, has attracted extensive attention from scholars in the field of photocatalysis, and has been applied in the fields of energy, environment, and health. However, factors such as the easy recombination of photoinduced carriers and the narrow specific surface area of ​​this material weaken its photocatalytic activity. Carbon nitride is often synthesized by thermal polymerization and belongs to two-dimensional materials. However, due to the strong interaction between layers, the two-dimensional materials accumulate significantly and are not easy to be peeled off. In recent years, th...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10C02F1/30C02F101/38
CPCB01J27/24C02F1/30C02F2305/10C02F2101/40C02F2101/38B01J35/39B01J35/60
Inventor 曾国王卫国段明慧
Owner NANHUA UNIV
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