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Carbon nanotube loaded CdSe-g-C3N4 photocatalytic material and preparation method thereof

A cdse-g-c3n4, photocatalytic material technology, applied in the field of photocatalytic degradation of organic pollutants, can solve the problems of narrow absorption band, low degree of electron separation, small specific surface area, etc., to enhance light absorption intensity and broaden light absorption Band, the effect of improving the degradation efficiency

Inactive Publication Date: 2020-02-14
王世扬
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a carbon nanotube loaded CdSe-g-C 3 N 4 The photocatalytic material and its preparation method solve the problems of the existing metal photocatalytic materials, ZnO and CdS, which are easy to agglomerate in water to form large particles, resulting in high recombination rates of photogenerated electrons and holes, and prone to photocorrosion. Solved g-C 3 N inorganic polymer semiconductor materials, the specific surface area is small, the degree of separation of electron pairs is low, and the visible light absorption band is narrow.

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  • Carbon nanotube loaded CdSe-g-C3N4 photocatalytic material and preparation method thereof
  • Carbon nanotube loaded CdSe-g-C3N4 photocatalytic material and preparation method thereof

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preparation example Construction

[0024] In order to achieve the above object, the present invention provides the following technical solutions: a carbon nanotube loaded CdSe-g-C 3 N 4 The photocatalytic material and its preparation method include the following formula raw materials in parts by weight: 8-10 parts of cadmium chloride, 10-12 parts of sodium selenosulfate, 30-34 parts of urea, 28-32 parts of melamine, 12- 24 parts of carbon nanotubes, the preparation method includes and the following experimental drugs: distilled water, dilute hydrochloric acid, absolute ethanol, CdCl in cadmium chloride 2 Its mass fraction is ≥92.2%, Na in sodium selenosulfate 2 SeSO 3 Its mass fraction is ≥94.5%, and the structural formula of urea is , its mass fraction is ≥96.5%, and the structural formula of melamine is , its mass fraction ≥ 97.8%, carbon nanotubes are multi-walled carbon nanotubes, size specifications: length 30-50 um diameter 8-15nm, substance concentration of dilute hydrochloric acid 3.3-3.6 mol / L, m...

Embodiment 1

[0029] (1) Preparation of high-purity micron CdSe: Add 500 mL of distilled water to a 1000 mL beaker, then weigh 8 parts of cadmium chloride and 10 parts of sodium selenosulfate into the beaker, stir well, and transfer the materials in the beaker to into the high-pressure hydrothermal reactor, and the reactor was placed in the reactor heating box, heated to 130 ° C for 12 h, after the reaction was completed, the high-pressure hydrothermal reactor was cooled to room temperature, and then the materials in the reactor were filtered to remove the solvent. To obtain solid particles, use 300 mL of dilute hydrochloric acid with a substance concentration of 3.3 mol / L and 3000 mL of distilled water to wash the solid particles to remove reactants and side reaction products, and then place the washed CdSe solid particles in a high-energy planetary ball mill, Add 300 mL of ethanol, rotate at 200 rpm, and mill for 6 hours until all the CdSe materials pass through an 800-mesh sieve. Finally,...

Embodiment 2

[0033] (1) Preparation of high-purity micron CdSe: Add 500 mL of distilled water to a 1000 mL beaker, then weigh 8.5 parts of cadmium chloride and 10.5 parts of sodium selenosulfate into the beaker, stir well, and transfer the materials in the beaker to Put the reaction kettle into the high-pressure hydrothermal reaction kettle, place the reaction kettle in the heating box of the reaction kettle, heat it to 130 ° C for 18 h, and cool the high-pressure hydrothermal reaction kettle to room temperature after the reaction is complete, then filter the materials in the reaction kettle to remove the solvent, To obtain solid particles, use 300 mL of dilute hydrochloric acid with a concentration of 3.3 mol / L and 4000 mL of distilled water to wash the solid particles to remove reactants and side reaction products, and then place the washed CdSe solid particles in a high-energy planetary ball mill, Add 300 mL of ethanol, rotate at 200 rpm, and mill for 8 h until the CdSe material passes t...

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Abstract

The invention relates to the technical field of photocatalytic degradation of organic pollutants, and discloses a carbon nanotube loaded CdSe-g-C3N4 photocatalytic material and a preparation method thereof. The photocatalytic material comprises the following formula raw materials: cadmium chloride, sodium selenosulfate, urea, melamine and carbon nanotubes. According to the material and the preparation method thereof, the formation interface of CdSe and g-C3N4 has an overlapped energy band heterostructure with good matching performance; the heterostructure can effectively separate photo-generated carriers and transmit photo-generated charges, and the effective separation of photo-induced electrons and holes is enhanced, and therefore, a large number of freely moving photo-induced electronse<-> and holes h<+> are generated; the holes h<+> have very strong oxidability, the photo-induced electrons e<-> and dissolved oxygen in water can generate superoxide free radical O<2->., holes h<+> and superoxide free radical O<2->. have very high oxidation-reduction potentials and can be subjected to an oxidation-reduction reaction with various organic pollutants, so that the degradation efficiency of the photocatalytic material on organic dye pollutants is greatly improved.

Description

technical field [0001] The invention relates to the technical field of photocatalytic degradation of organic pollutants, specifically a carbon nanotube loaded CdSe-g-C 3 N 4 Photocatalytic materials and their preparation methods. Background technique [0002] Photochemical degradation refers to the reaction in which organic compounds are degraded into homologues with fewer carbon atoms under the action of light. Photocatalytic degradation technology is a new, efficient and energy-saving modern anhydrous treatment technology. Semiconductor photocatalytic reactions can be carried out at room temperature. The use of light energy to decompose organic matter is an important method for the treatment of various organic pollutants. It is divided into direct photolysis and indirect photolysis. Photoreactions such as fracture or structural rearrangement, and indirect photolysis are photoreactions in which certain substances in the environment first absorb light energy and become exc...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J27/057B01J21/18C02F1/30C02F1/70C02F1/72
CPCB01J27/24B01J27/0573B01J21/185C02F1/30C02F1/70C02F1/725C02F2305/10C02F2305/023C02F2101/308B01J35/39
Inventor 王世扬
Owner 王世扬
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