Novel photocatalyst K-g-C3N4 as well as preparation and application thereof

A photocatalyst, k-g-c3n4 technology, applied in the field of photocatalysis, can solve the problem that the catalytic performance of photocatalyst has not been reported

Inactive Publication Date: 2018-03-09
FUYANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, potassium ions have a negative effect on g-C 3 N 4 Research on the influence of photocatalyst on catalytic performance has not been reported

Method used

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  • Novel photocatalyst K-g-C3N4 as well as preparation and application thereof
  • Novel photocatalyst K-g-C3N4 as well as preparation and application thereof
  • Novel photocatalyst K-g-C3N4 as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Accurately weigh 2.0000g of dicyandiamide into a 50mL beaker, add about 10mL of deionized water to dissolve. Under vigorous stirring, after dicyandiamine is completely dissolved, accurately measure 10 mL of potassium hydroxide solution (concentration is 0.02 mol / L) with a graduated cylinder and add it to the reaction system to obtain a suspension;

[0048] Heat the obtained suspension to 100°C, remove a large amount of water in the reaction system, and dry the solid in an oven at 80°C;

[0049] Put the evaporated solids in a crucible and place them together in a muffle furnace for calcination at 550°C for 2 hours, with a heating rate of 5°C min -1 After the calcination is completed, the product is cooled to room temperature, ground into powder with an agate mortar, placed in a sample bag, sealed and protected from light, stored in a dry place, and labeled. The obtained product was named K(0.02)-CN.

Embodiment 2

[0051] Use an electronic balance to accurately weigh 2.0000g of dicyandiamide and place it in a 50mL beaker, add about 10mL of deionized water to dissolve, stir vigorously, and after the dicyandiamine is completely dissolved, use a graduated cylinder to accurately measure 10mL of hydrogen Potassium oxide solution (concentration is 0.05mol / L) is added in the reaction system, obtains suspension;

[0052] Heat the obtained suspension to 100°C, remove a large amount of water in the reaction system, and dry the solid in an oven at 80°C;

[0053] Then calcined in a muffle furnace at 550°C for 2h, the heating rate is 5°Cmin -1 , when the product is cooled to room temperature, grind it into powder with an agate mortar, put it in a sample bag, seal it away from light, store it in a dry place, and stick a label. The obtained product was named K(0.05)-CN.

Embodiment 3

[0055] Accurately weigh 2.0000g of dicyandiamide and place it in a 50mL beaker, add about 10mL of deionized water to dissolve, stir vigorously, after the dicyandiamide is completely dissolved, accurately measure 10mL of potassium hydroxide solution with a graduated cylinder (Concentration is 0.07mol / L) is added in the reaction system, obtains suspension;

[0056] Heat the obtained suspension to 100°C, remove a large amount of water in the reaction system, and dry the solid in an oven at 80°C;

[0057] Put the evaporated solid in a crucible, and then calcinate it in a muffle furnace at 550°C for 2h, and the heating rate is 5°Cmin -1 After calcination, the product is cooled to room temperature, ground into powder with an agate mortar, placed in a sample bag, sealed and protected from light, stored in a dry place, and labeled. The obtained product was named K(0.07)-CN.

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Abstract

The invention relates to a photocatalyst K-g-C3N4 as well as preparation and application thereof. The preparation method of the photocatalyst comprises the following steps: with nitrogen-containing organic matters and potassium hydroxide as precursors, performing aftertreatment, and performing calcining and grinding, thereby obtaining the photocatalyst K-g-C3N4. The photocatalyst K-g-C3N4 is represented through X-ray diffraction (XRD), infrared ray (IR) spectrums, ultraviolet visible diffuse reflection (UV-Vis DRS), laser particle size distribution diagrams, and the like. The invention furtherrelates to application of the photocatalyst. Methyl orange is adopted as a mold compound of a photocatalysis reaction, and the ultraviolet catalytic activity of the photocatalyst and the influence ofdifferent detergents to the catalytic activity of the photocatalyst are evaluated.

Description

technical field [0001] The invention relates to a novel composite photocatalyst for treating dye wastewater pollution and a preparation method thereof, belonging to the field of photocatalysis. Background technique [0002] g-C 3 N 4 With its outstanding advantages of high photocatalytic activity, good stability, cheap raw materials, especially the absence of metals, it has become a new type of photocatalytic material. However, single-phase catalysts usually have low quantum efficiency. The photocatalytic performance is not ideal. [0003] Ing-C 3 N 4 The high photogenerated electron-hole recombination rate of the material leads to its low catalytic efficiency, which limits its application in photocatalysis. To improve g-C 3 N 4 In recent years, many modification methods have been studied. Metal element doping is to change the g-C 3 N 4 An important means of electronic band structure. Thanks to g-C 3 N 4 The negatively charged N atoms in the middle can interact ...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J37/08C02F1/30C02F101/30
CPCC02F1/30B01J27/24B01J37/08C02F2101/308C02F2305/10B01J35/39
Inventor 李慧泉崔玉民苗慧师瑞娟
Owner FUYANG NORMAL UNIVERSITY
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