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Silver-modified carbon nitride composite photocatalytic material and preparation method thereof

A technology of composite photocatalysis and carbon nitride, which is applied in the direction of chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of high cost and poor purification effect, and achieve the purpose of inhibiting recombination and improving photocatalysis efficiency effect

Inactive Publication Date: 2015-04-01
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a preparation method and application of a silver / carbon nitride composite photocatalytic material with low cost, simple preparation and environmental protection, and overcome the current It has the defects of high cost of functional materials and poor purification effect, laying a technical foundation for the development and application of low-cost, high-performance environmental purification materials

Method used

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  • Silver-modified carbon nitride composite photocatalytic material and preparation method thereof
  • Silver-modified carbon nitride composite photocatalytic material and preparation method thereof
  • Silver-modified carbon nitride composite photocatalytic material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0027] Dissolve 10mmol (0.84 g) of dicyandiamide in 40 ml of deionized water and sonicate for 30 minutes to obtain a dispersion of dicyandiamide; weigh 10 mmol (1.69 g) of silver nitrate and dissolve it in 40 ml of deionized water, stir for 10 minutes, Obtaining a silver nitrate solution; adding the above-mentioned silver nitrate solution dropwise to the dicyandiamide dispersion under the condition of magnetic stirring to form a mixed solution, and slowly stirring the mixed solution for 6 hours after the dropwise addition to obtain a mixed precursor solution; The obtained mixed precursor solution was repeatedly washed with absolute ethanol and deionized water for 3 times, and then dried in vacuum at 50 degrees. Then, the product was put into a suitable crucible and covered, and then placed in a high-temperature atmosphere furnace. Under the condition of nitrogen protection, the sample In the high-temperature atmosphere furnace, the temperature was raised from room temperature t...

Embodiment 2

[0029] Dissolve 10 mmol (0.84 g) of dicyandiamide in 40 ml of deionized water and sonicate for 30 minutes to obtain a dispersion of dicyandiamide; weigh 20 mmol (3.38 g) of silver nitrate and dissolve it in 40 ml of deionized water, stir for 10 minutes, Obtaining a silver nitrate solution; adding the above-mentioned silver nitrate solution dropwise to the dicyandiamide dispersion under the condition of magnetic stirring to form a mixed solution, and slowly stirring the mixed solution for 6 hours after the dropwise addition to obtain a mixed precursor solution; The obtained mixed precursor solution was repeatedly washed with absolute ethanol and deionized water for 3 times, and then dried in vacuum at 50 degrees; then the product was put into a suitable crucible and covered, and then placed in a high-temperature atmosphere furnace. Under the condition of nitrogen protection, the sample In the high-temperature atmosphere furnace, the temperature was raised from room temperature t...

Embodiment 3

[0031] Dissolve 10mmol (0.84 g) of dicyandiamide in 40 ml of DMSO and sonicate for 30 minutes to obtain a dispersion of dicyandiamide; weigh 10 mmol (1.69 g) of silver nitrate and dissolve it in 40 ml of deionized water, stir for 10 minutes to obtain Silver nitrate solution; the above-mentioned silver nitrate solution is added dropwise to the dicyandiamide dispersion liquid under the condition of magnetic stirring to form a mixed solution, and after the dropwise addition, the mixed solution is slowly stirred for 6 hours to obtain a mixed precursor solution; the obtained The mixed precursor solution was repeatedly washed with absolute ethanol and deionized water for 3 times, and then dried in vacuum at 50 degrees; then the product was put into a suitable crucible and covered, and then placed in a high-temperature atmosphere furnace. The high-temperature atmosphere furnace rises from room temperature to 550 degrees at a constant speed for 4 hours, heat-preserves and sinters for 4...

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Abstract

The invention relates to a silver-modified carbon nitride composite photocatalytic material and a preparation method thereof. The preparation method comprises: dissolving dicyanodiamide or melamine in deionized water or dimethyl sulfoxide and performing ultrasonic dispersing, so as to obtain a dicyanodiamide or melamine dispersion liquid; dissolving silver nitrate in deionized water and stirring uniformly, so as to obtain a silver nitrate solution; slowly dropwise adding the silver nitrate solution into the above dicyanodiamide or melamine dispersion liquid under the condition of magnetic stirring, and continuing stirring the solution, so as to obtain a mixed precursor solution; using anhydrous ethanol and deionized water repeatedly wash the obtained mixed precursor solution for multiple times, and performing vacuum drying; and putting the obtained product in a proper crucible and covering, putting in a high-temperature furnace, and sintering for a period under the condition of nitrogen protection, so as to obtain a powdery sample. The advantages comprise that the raw material source is wide, the preparation technology is simple and practicable, and the cost is relatively low; and the prepared composite photocatalytic material has relatively good photocatalytic degradation effect on organic dye rhodamine B under irradiation of visible light.

Description

technical field [0001] The invention relates to a silver-modified carbon nitride composite photocatalytic material and a preparation method thereof, in particular to a method for preparing a silver / carbon nitride composite photocatalytic material by an ion exchange method in an aqueous solution, belonging to composite materials, photocatalytic Technology and the field of water pollution control. Background technique [0002] With the development of industry, the limited water resources of human beings are increasingly polluted, and the removal of toxic and harmful chemicals such as pesticides and organic dyes in water has become an important task in the field of environmental protection; however, most of the current water pollution treatment methods are aimed at Pollutants with large emissions and high concentrations are still powerless to purify the priority pollutants in water bodies with low concentrations and difficult to transform. However, the photocatalytic degradat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30
Inventor 秦洁玲杨小飞李荣唐华
Owner JIANGSU UNIV
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