Preparation method of montmorillonite/graphite phase carbon nitride composite photocatalysis material

A graphite phase carbon nitride, montmorillonite technology, applied in physical/chemical process catalysts, chemical instruments and methods, special compound water treatment, etc., can solve the problems of high raw material cost, complex synthesis process, etc., and achieve low raw material cost. , The preparation method is simple and easy, and the effect is suitable for large-scale application.

Inactive Publication Date: 2019-08-06
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most methods have complex synthesis processes and high raw material costs.

Method used

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  • Preparation method of montmorillonite/graphite phase carbon nitride composite photocatalysis material
  • Preparation method of montmorillonite/graphite phase carbon nitride composite photocatalysis material
  • Preparation method of montmorillonite/graphite phase carbon nitride composite photocatalysis material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Graphite phase carbon nitride photocatalyst, it is prepared by following steps:

[0026] (1) Take by weighing 10g urea and add in the crucible, add a cover and put into the muffle furnace;

[0027] (2) Raise the temperature to 550° C. at a rate of 5° C. / min, keep the temperature constant for 2 hours, and grind the product to obtain a graphite-phase carbon nitride photocatalyst.

Embodiment 2

[0029] A kind of montmorillonite / graphite phase carbon nitride composite photocatalyst, it is prepared by following steps:

[0030] (1) Add 2 mg of montmorillonite into 30 mL of ultrapure water, stir evenly and then ultrasonically for 30 minutes to obtain a montmorillonite suspension;

[0031] (2) Add 10 g of urea to the above-mentioned montmorillonite suspension, and stir overnight in a water bath at 50° C.;

[0032] (3) The mixture in step (2) is freeze-dried, and the resulting solid mixture is ground and transferred to a covered crucible for

[0033] Raise the temperature at a rate of 5°C / min to 550°C, keep the temperature constant for 2 hours, and grind the product to obtain 1.0% Mt / g-C 3 N 4 composite photocatalyst.

[0034] refer to figure 1 and 2 as shown, figure 1 It is the field emission scanning electron microscope topography figure of the original graphite phase carbon nitride sheet structure and porous structure of the gained example 1; figure 2 It is the m...

Embodiment 3

[0036] Repeat Example 2, with the following differences, the addition of montmorillonite is 0.5mg, 1.0mg, 5mg. Composite materials obtained with different ratios of Mt are recorded as 0.25% Mt / g-C 3 N 4 , 0.5%Mt / g-C 3 N 4 , 2.5% Mt / g-C 3 N 4 .

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Abstract

The invention belongs to the technical field of environmental protection, relates to a preparation method of a photocatalysis material, and especially relates to a method for preparing a montmorillonite / graphite phase carbon nitride composite photocatalyst from urea and montmorillonite by using wet blending and co-calcining. The method can increase the specific surface area of the composite material, inhibit the compounding of photogenerated electrons and holes, promote the mass transfer of active species and enhance the visible light utilization efficiency of the composite material by optimizing the ratio of urea to montmorillonite during wet blending and regulating the calcination atmosphere and the heating rate, so the photocatalytic rate is increased to achieve the purpose of efficiently decomposing mineralized organic pollutants. The preparation method has the advantages of low prices and wide sources of the raw materials, simple and easily operated synthetic process, green andpollution-free process, realization of no toxicity and no pollution of the synthesized montmorillonite / graphite phase carbon nitride composite photocatalyst, and suitableness for large-scale application.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a preparation method of a montmorillonite / graphite-phase carbon nitride composite photocatalytic material. [0002] technical background [0003] The photocatalytic degradation technology driven by solar energy has the characteristics of making full use of clean and renewable energy, and has unique advantages and good application prospects in the field of environmental pollution prevention and control. Graphite carbon nitride (g-C 3 N 4 ) as a non-metallic organic polymer semiconductor material with a bandgap of about 2.7eV and a suitable energy band position to absorb visible light. In addition, g-C 3 N 4 It has good physical and chemical stability and has potential application prospects in photocatalytic degradation of pollutants. g-C 3 N 4 It can be formed by some nitrogen-rich organic substances such as dicyandiamide and melamine through thermal condensat...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30C02F101/30C02F101/34C02F101/36C02F101/38
CPCB01J27/24C02F1/30C02F2101/30C02F2101/34C02F2101/345C02F2101/36C02F2101/38C02F2305/10B01J35/39
Inventor 周琴许骐郭见龙潘纲
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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