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Carbon nitride high-load dispersed NiS photocatalytic degradation material and preparation method thereof

A degradable material and high-load technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as low efficiency and poor response to visible light, and achieve the promotion of photocatalytic degradation reactions, photocatalytic Performance improvement, effect of high specific surface area

Pending Publication Date: 2021-11-05
NINGXIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A single semiconductor photocatalyst often has defects such as poor response to visible light and easy recombination of photogenerated electron-hole pairs, and its efficiency is low when applied to photocatalytic degradation of pollutants. Therefore, the development of new composite nanomaterials is very important for photocatalytic degradation of pollutants.

Method used

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  • Carbon nitride high-load dispersed NiS photocatalytic degradation material and preparation method thereof
  • Carbon nitride high-load dispersed NiS photocatalytic degradation material and preparation method thereof
  • Carbon nitride high-load dispersed NiS photocatalytic degradation material and preparation method thereof

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preparation example Construction

[0028] The invention relates to a method for preparing a large specific surface S-doped carbon nitride high-load dispersed NiS photocatalytic degradation material. The preparation process uses mesoporous silicon dioxide as a template, and first prepares mesoporous materials by using a soft template method at 40°C. Silica template; then cyanamide aqueous solution (50%) and thiourea precursor and mesoporous silica are fully stirred evenly at a certain temperature; secondly, they are calcined in air atmosphere; Silica template to obtain the desired ordered mesoporous carbon nitride. After that, on the photocatalytic degradation performance evaluation device, by adding sodium sulfide nonahydrate and nickel chloride hexahydrate, photodeposition synthesized photocatalytic degradation materials with large specific surface S-doped carbon nitride and high load dispersion NiS.

[0029] The invention provides a large specific surface S-doped carbon nitride high-load dispersed NiS photoca...

Embodiment 1

[0041] Take 7.2g of surfactant P123, 260mL of water and 1.2mL of concentrated hydrochloric acid (37%), mix at 35°C, stir for 12h until the surfactant P123 is completely dissolved and dispersed evenly, then add 7.2g of n-butanol, and stir for 2h , add 15.48g tetraethyl orthosilicate TEOS, stir for 24 hours, then transfer to a polytetrafluoroethylene bottle after suction filtration, react with water in an oven at 40°C for 24 hours, after natural cooling, suction filtration and wash with deionized water until neutral . Dry overnight at 70°C to obtain surfactant-containing mesoporous silica; place it in a muffle furnace for calcination at 550°C for 6 hours to remove surfactant P123 to obtain white powder, which is the mesoporous silica template.

[0042] Take 2.3794g of cyanamide aqueous solution (50%) and 1.3085g of thiourea in the polytetrafluoroethylene lining, add 4g of the aforementioned mesoporous silica as a hard template, and add 40mL of absolute ethanol, and stir at 40°C ...

Embodiment 2

[0045] Take 7.2g of surfactant P123, 260mL of water and 1.2mL of concentrated hydrochloric acid (37%), mix at 35°C, stir for 12h until the surfactant is completely dissolved and dispersed evenly, then add 7.2g of n-butanol, and stir for 2h, Add 15.48g tetraethyl orthosilicate TEOS, stir for 24 hours, then transfer to a polytetrafluoroethylene bottle after suction filtration, hydrothermally react in an oven at 40°C for 24 hours, naturally cool, suction filter and wash with deionized water until neutral. Dry overnight at 70°C to obtain surfactant-containing mesoporous silica; place it in a muffle furnace for calcination at 550°C for 6 hours to remove surfactant P123 to obtain white powder, which is the mesoporous silica template.

[0046] Take 2.3794g of cyanamide aqueous solution (50%) and 1.3085g of thiourea in the polytetrafluoroethylene lining, add 4g of the aforementioned mesoporous silica as a hard template, and add 40mL of absolute ethanol, and stir at 40°C until Dry, cov...

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Abstract

The invention relates to a carbon nitride high-load dispersed NiS photocatalytic degradation material and a preparation method thereof. The photocatalytic degradation material is characterized in that the photocatalytic degradation material is obtained by taking S-doped ordered mesoporous carbon nitride as a basis and loading nickel sulfide with different mass fractions. According to the invention, the NiS cocatalyst is further loaded on the basis of the S-doped carbon nitride material, so that not only can the separation of current carriers be improved by doping, but also the high loading capacity and high dispersion loading of the NiS cocatalyst can be ensured by utilizing a relatively large specific surface area, and the photocatalytic degradation performance of the material can be further improved by virtue of an ordered three-dimensional structure.

Description

technical field [0001] The invention relates to a carbon nitride high-load dispersed NiS photocatalytic degradation material and a preparation method. Background technique [0002] The long-term use of fossil energy has caused irreparable damage to the natural environment, such as the emergence of the ozone hole and the greenhouse effect. Fossil energy is a kind of non-renewable energy, so it is urgent to develop new and clean energy forms that can replace fossil energy, reduce damage to the environment, and achieve sustainable development (Service R F. Is It Time to Shoot for the Sun? [J] . Science, 309.). Environmental pollution is not limited to air pollution, water pollution is also becoming more and more serious. The problem of the degradation of antibiotics and other pharmaceutical ingredients with excessive content in the water body needs to be solved urgently. For this reason, we propose to eliminate organic pollutants in water bodies by photocatalytic degradation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J27/043B01J35/10B01J37/10C02F1/30C02F101/30C02F101/34C02F101/36C02F101/38
CPCB01J27/24B01J27/043B01J37/10B01J37/0009C02F1/30C02F2101/30C02F2101/34C02F2101/36C02F2101/38C02F2305/10C02F2101/308B01J35/394B01J35/615B01J35/633B01J35/647B01J35/39Y02W10/37
Inventor 赖小勇陈恬洁王晓中杨庆凤孙辉
Owner NINGXIA UNIVERSITY
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