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Monatomic cobalt-loaded tubular carbon nitride catalyst as well as preparation method and application thereof

A carbon nitride and catalyst technology, which is applied in the field of monoatomic cobalt-supported tubular carbon nitride catalyst and its preparation, can solve the problems of low catalytic activity, few activation sites, and low catalytic efficiency, and achieve the effect of increasing the specific surface area

Active Publication Date: 2022-05-27
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Nevertheless, the following problems still exist in the preparation of cobalt single atom-supported carbon nitride: (1) the existing preparation method is more complicated and costly; The amount is low, the metal is easy to agglomerate, and the catalytic activity of activated persulfate is not high under the condition of no light, and the cycle stability is poor; (3) the material specific surface area of ​​the existing cobalt single atom supported carbon nitride is low, the activation site is few, The catalytic efficiency is low, and the existence of the above-mentioned problems limits the wide application of cobalt single atom supported carbon nitride

Method used

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  • Monatomic cobalt-loaded tubular carbon nitride catalyst as well as preparation method and application thereof
  • Monatomic cobalt-loaded tubular carbon nitride catalyst as well as preparation method and application thereof
  • Monatomic cobalt-loaded tubular carbon nitride catalyst as well as preparation method and application thereof

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Embodiment 1

[0042] A preparation method of a single-atom cobalt-loaded tubular carbon nitride catalyst is prepared by using melamine and cobalt acetate as raw materials through hydrothermal re-calcination, comprising the following steps:

[0043] Take 5g of melamine and grind it, dissolve it in 80mL of deionized water, and stir at a constant speed for 2 hours at 80°C to obtain a uniform mixed solution (a clear and transparent melamine solution); transfer the mixed solution to a 500mL autoclave, and heat it at 180°C Incubate for 12h, rinse with water for 5 times after natural cooling, filter, and dry at 60°C for 6h to obtain cyanuric acid-melamine supramolecular precursor; take 1.26g of cyanuric acid-melamine supramolecular precursor and put it in a beaker , mixed with 50 mL, 2.5 mmol / L of cobalt acetate ethanol solution (the solution was prepared by dissolving cobalt acetate into ethanol solution), stirred at a uniform speed for 12 h to obtain a uniform mixed solution, and then the mixed s...

Embodiment 2

[0073] The application of a single-atom cobalt-loaded tubular carbon nitride catalyst in treating antibiotic wastewater, specifically utilizing the single-atom cobalt-loaded tubular carbon nitride catalyst to activate persulfate to degrade antibiotics in water, comprising the following steps:

[0074] Weigh the single-atom cobalt-supported tubular carbon nitride catalyst (Co-N 3 O 1 -1. Co-N 3 O 1 -2. Co-N 3 O 1 -3), the tubular carbon nitride (TCN) prepared in Comparative Example 1, the layered carbon nitride (CN) prepared in Comparative Example 2, and the monoatomic cobalt-supported layered nitride prepared in Comparative Example 3 Carbon catalyst (Co-N 4 ), monoatomic iron prepared in Comparative Example 4, supported tubular carbon nitride (Fe-C 3 N 4 ) and monoatomic copper-supported tubular carbon nitride (Cu-C 3 N 4 ), the single-atom cobalt-supported layered carbon nitride (Co-C 3 N 4 -2), the single-atom cobalt-supported tubular carbon nitride catalyst prepa...

Embodiment 3

[0087] The stability of single-atom cobalt-supported tubular carbon nitride was investigated, and the specific steps were as follows: Recycling the single-atom cobalt-supported tubular carbon nitride catalyst to activate persulfate to degrade organic pollutants in water for many times. The specific steps are as follows:

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Abstract

The invention discloses a monatomic cobalt-loaded tubular carbon nitride catalyst and a preparation method and application thereof, and the preparation method comprises the following steps: mixing melamine and / or dicyandiamide with water to prepare a mixed solution; carrying out hydrothermal reaction on the mixed solution to obtain a supramolecular precursor; and mixing the supramolecular precursor with an ethanol solution of cobalt acetate to prepare a cobalt acetate-loaded supramolecular precursor, and calcining to obtain the monatomic cobalt-loaded tubular carbon nitride catalyst. The atomic cobalt-loaded tubular carbon nitride catalyst prepared by the method has the advantages of high specific surface area, multiple reaction active sites, good catalytic performance, high metal atom utilization rate and the like, can be widely used for activating persulfate to degrade organic pollutants, has a good degradation effect, and has good application value and application prospect; meanwhile, the preparation method disclosed by the invention also has the advantages of simple process, convenience in operation, easiness in obtaining raw materials, low cost and easiness in realizing industrial production, and has a relatively great application prospect in the field of environmental catalysis.

Description

technical field [0001] The invention belongs to the technical field of material preparation and environmental catalysis, and relates to a single-atom cobalt-supported tubular carbon nitride catalyst and a preparation method and application thereof. Background technique [0002] Antibiotics are widely used in various pharmaceuticals and personal care products. Due to the extremely low metabolism rate of antibiotics in humans and animals, some antibiotics will be directly excreted without change, and surface water, groundwater and sewage treatment plants are located all over the world. Excessive antibiotics were detected in all cases. At present, the technologies for treating antibiotic wastewater mainly include biotechnology, physicochemical technology and advanced oxidation technology. The traditional "coagulation-precipitation-filtration-disinfection" water treatment process cannot effectively remove antibiotics. Therefore, it is imperative to develop an efficient technolo...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J23/75B01J35/10C02F1/72C02F101/34C02F101/36C02F101/38
CPCB01J27/24B01J23/75C02F1/725C02F2101/34C02F2101/36C02F2101/38B01J35/23B01J35/613Y02W10/37
Inventor 王紫薇尹焯曾光明许飘王晗汪文军何阳卓罗崧豪李玲杨海澜
Owner HUNAN UNIV
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