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Carbonized polydopamine coated cobalt nanoparticle material and preparation and application methods thereof

A technology of carbonized polydopamine and granular materials, applied in chemical instruments and methods, chemical/physical processes, oxidized water/sewage treatment, etc., can solve problems such as limiting the development process of high-efficiency catalysts, weakening or even ignoring contributions, and solve difficult separation Poor recovery and recycling, good economic and social benefits, and simple and easy-to-operate process

Pending Publication Date: 2022-03-01
PEARL RIVER FISHERY RES INST CHINESE ACAD OF FISHERY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, current research focuses on increasing the number of active sites for catalytic reactions to develop new persulfate-activated catalysts, and the contribution of adsorption to the catalytic process is often weakened or even ignored, which limits the development of highly efficient catalysts to a certain extent.

Method used

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  • Carbonized polydopamine coated cobalt nanoparticle material and preparation and application methods thereof
  • Carbonized polydopamine coated cobalt nanoparticle material and preparation and application methods thereof
  • Carbonized polydopamine coated cobalt nanoparticle material and preparation and application methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] With 100mL Tris-HCl buffer solution (pH=8.5) with a substance concentration of 10mmol / L as the dispersion medium, add 28.6mg of CoCl under stirring 2 ·6H 2 O, after the dissolution is complete, add 0.2g dopamine hydrochloride. After reacting for 6 hours, wash it centrifugally with distilled water (centrifugal speed 10000r / min, centrifugation time 10min), then vacuum dry the product at 80°C for 12 hours. Grind, place in a vacuum tube furnace and heat up to 800°C in a nitrogen atmosphere, the heating rate is 5°C / min, and keep warm for 2h to obtain the target product of the present invention, that is, a novel carbonized polydopamine-coated cobalt nanoparticle material (bifunctional polydopamine Derivative nitrogen-doped carbon-coated cobalt nanoparticle material).

[0035] Depend on figure 1It can be seen from the XRD figure that the diffraction peaks presented by the materials prepared in this embodiment correspond to graphite carbon (PDF#00-023-0064), cubic cobalt crys...

Embodiment 2

[0040] With 100mL Tris-HCl buffer solution (pH=8.5) with a substance concentration of 10mmol / L as the dispersion medium, add 28.6mg of CoCl under stirring 2 ·6H 2 O, after the dissolution is complete, add 0.2g dopamine hydrochloride. After reacting for 6 hours, after centrifugation and washing with distilled water (centrifugal speed 15000r / min, centrifugation time 5min), the product is vacuum-dried at 60°C for 24 hours. After drying, pass through an agate mortar Grind, place in a vacuum tube furnace and heat up to 1000°C in a helium atmosphere, the heating rate is 1°C / min, and keep warm for 1h to obtain the target product of the present invention, that is, a novel carbonized polydopamine-coated cobalt nanoparticle material (bifunctional polydopamine Dopamine-derived nitrogen-doped carbon-coated cobalt nanoparticle material).

[0041] Novel carbonized polydopamine-coated cobalt nanoparticles for catalytic activation of persulfate to degrade bisphenol A in wastewater: 15 mg of ...

Embodiment 3

[0043] With 100mL Tris-HCl buffer solution (pH=8.5) with a substance concentration of 10mmol / L as the dispersion medium, add 42.9mg of CoCl under stirring 2 ·6H 2 O, after the dissolution is complete, add 0.2g dopamine hydrochloride. After reacting for 4 hours, after centrifugation and washing with distilled water (centrifugation speed 12000r / min, centrifugation time 8min), the product is vacuum-dried at 100°C for 12 hours. Grind, place in a vacuum tube furnace and heat up to 700°C in an argon atmosphere with a heating rate of 3°C / min, and keep warm for 3h to obtain the target product, which is a new carbonized polydopamine-coated cobalt nanoparticle material (bifunctional polydopamine-derived nitrogen doped carbon-coated cobalt nanoparticle material).

[0044] The new carbonized polydopamine-coated cobalt nanoparticle material prepared in this example is used to catalyze the activation of persulfate to degrade diclofenac in wastewater: 15 mg of bifunctional polydopamine-deri...

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Abstract

The invention relates to a carbonized polydopamine coated cobalt nanoparticle material and a preparation and application method thereof, and the preparation method comprises the following steps: S1, adjusting the pH value of a Tris-HCl buffer solution to 8.5 (solution A), then adding cobalt chloride hexahydrate, and stirring until the cobalt chloride hexahydrate is completely dissolved (solution B); s2, adding dopamine, stirring and reacting, centrifugally washing, drying in vacuum, and grinding to obtain a substance C; and S3, putting the substance C into a vacuum tube furnace, and sintering under the protection of inert gas. The material prepared by the invention has double functions of adsorption and persulfate catalytic oxidation, the catalytic action of the material enables strongly adsorbed pollutants to be quickly decomposed in situ, and released adsorption sites adsorb residual organic matters again, so that more organic matters participate in the transfer process, and the removal efficiency is improved; the adsorption-degradation-adsorption circulation mode provides a new removal strategy for removing sulfamethoxazole, diclofenac, bisphenol A and enrofloxacin in the water environment, and has remarkable environmental benefits.

Description

technical field [0001] The invention relates to the technical field of catalytic activation materials, in particular to a bifunctional polydopamine-derived nitrogen-doped carbon-coated cobalt nanoparticle material and its preparation method and application method. Background technique [0002] Compared with OH·, SO 4 -· have a higher oxidation potential (SO 4 -· =2.5~3.1V, OH =1.9~2.7V), wider working pH range (2-9) and longer half-life (30-40μs), therefore, based on SO 4 -· The persulfate advanced oxidation technology has received more and more attention in the application of removing pollutants in the water environment. The persulfate activation methods include external energy activation such as light and ultrasonic waves, activation of transition metal ions, elemental substances and oxides, and activation of carbon materials. [0003] It has been proved by many scholars that cobalt-based materials are the best among many transition metal-based nanocatalysts due to t...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/02C02F1/72C02F101/30C02F101/34C02F101/38
CPCB01J27/24C02F1/722C02F1/725C02F2101/30C02F2101/345C02F2101/40C02F2101/38B01J35/396B01J35/23B01J35/33B01J35/40B01J35/50Y02W10/37
Inventor 林嘉薇尹怡郑光明李丽春马丽莎黎嘉惠
Owner PEARL RIVER FISHERY RES INST CHINESE ACAD OF FISHERY SCI
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