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Preparation method of novel zinc monatomic catalyst loaded on carbon-based material

A technology of carbon-based materials and catalysts, which is applied in the field of nano-catalytic materials and environmental applications, can solve the problems of metal ion leaching, low catalytic performance, etc., and achieve the effect of improving loading capacity and stability, simple process and rich methods

Inactive Publication Date: 2020-09-29
NANKAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are often problems of metal ion leaching and low catalytic performance.

Method used

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  • Preparation method of novel zinc monatomic catalyst loaded on carbon-based material
  • Preparation method of novel zinc monatomic catalyst loaded on carbon-based material
  • Preparation method of novel zinc monatomic catalyst loaded on carbon-based material

Examples

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Effect test

Embodiment 1

[0025] Example 1: Preparation of a novel carbon-based material-supported zinc single-atom catalyst (Zn@NC-1100 ℃)

[0026] 1) Add 0.47 g Zn(NO 3 ) 2 ·6H 2 O was dissolved in 100 mL of methanol, and magnetically stirred for 5 min to form solution A;

[0027] 2) Dissolve 3.26 g of 2-methylimidazole (2-Methylimidazole) in 100 mL of methanol, stir magnetically for 5 min, and prepare solution B;

[0028] 3) Add solution B of 2) to solution A of 1), and keep stirring for 1 h;

[0029] 4) The suspension obtained in 3) was centrifuged at 8000 rpm, washed 3 times, and vacuum-dried at 60 °C for 6 h to obtain the precursor ZIF-8;

[0030] 5) Take 0.50 g of ZIF-8 obtained in 4) and uniformly disperse it into the crucible of an oxidation furnace, and calcinate it at 900 ℃ for 2 h in a nitrogen atmosphere to obtain NPC-900 ℃. The heating rate is 5 °C / min, and it is kept at 500 °C for 1 h;

[0031] 6) The sample in 5) was heated up to 1100 °C at a rate of 5 °C / min, and ammoniated with ...

Embodiment 2

[0034] Example 2: New Zn@NC-1100 ℃ catalyst activates persulfate to remove organic pollutants

[0035] In order to investigate the degradation efficiency of the new Zn@NC-1100 ℃ catalyst on phenolic substances, the representative phenol (Phenol) was selected as the target organic pollutant. Prepare 10 mmol / L Phenol stock solution, 50 mmol / L potassium persulfate (PMS) stock solution and 0.2 mol / L boric acid / borax buffer solution (pH 7.2) with deionized water; add 10 mL Phenol stock solution, 15 mL PMS stock solution, 25 mL buffer solution, deionized water, wherein Phenol and PMS were placed separately before starting the reaction, and the pH of the reaction system was adjusted to 7.2 respectively, and the temperature of the reaction system was controlled; Add 0.005g of the catalyst to be tested in the Phenol part of the reaction system, pour the PMS part into it quickly and mix, start timing, place the reaction device (conical flask) in a constant temperature shaker, take sampl...

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Abstract

The invention discloses a preparation method of a novel zinc monatomic catalyst loaded on a carbon-based material, and relates to the field of nano material heterogeneous catalysis. The preparation method comprises the following steps: mixing a methanol precursor solution composed of cobalt nitrate dissolved by magnetic stirring and 2-methylimidazole, carrying out a magnetic stirring reaction for1 h to obtain a precursor ZIF-8, and subjecting the dried ZIF-8 to calcining and ammoniation to synthesize the zinc monatomic catalyst Zn@NC-1100 DEG C loaded on the carbon-based material. The invention provides a concise zinc monatomic catalyst synthesis method, and a Zn-based material is successfully applied to a persulfate Fenton reaction system for the first time. Meanwhile, the novel zinc monatomic catalyst is high in atom loading capacity and can efficiently catalyze a persulfate Fenton reaction, so that organic pollutants are continuously mineralized. A good material basis and a good modification method are provided for the application of heterogeneous Fenton-like catalytic reaction in the aspect of wastewater treatment.

Description

technical field [0001] The invention relates to the field of nano-catalytic materials and environmental applications, in particular to a preparation method of a novel carbon-based material-supported zinc single-atom catalyst and application research on highly efficient degradation of organic pollutants. Background technique [0002] Water is the source of life. Countries all over the world attach great importance to the protection of water resources and the control of water pollution. Nowadays, my country's wastewater discharge standards are getting higher and higher, and the development of efficient treatment technologies for pollutants in wastewater is becoming more and more urgent. Among the treatment methods of refractory organic wastewater, the advanced oxidation process (Advanced Oxidation Process, AOPs) has an outstanding treatment effect. [0003] In recent years, Fenton-like technology based on persulfate has gradually begun to attract attention. Activation of per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/06C02F1/72C02F101/34
CPCB01J23/06C02F1/725C02F2101/345
Inventor 祝凌燕蔚晓勇
Owner NANKAI UNIV
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