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Metal monatomic catalyst as well as preparation method and application thereof

A catalyst and metal technology, which is applied to a metal single-atom catalyst and its preparation method and application field, can solve the problems of increased chromaticity of effluent, high cost, leakage of metal ions, etc., and achieves the effect of reducing the dosage and solving the leakage of metal ions.

Active Publication Date: 2021-01-29
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, activation of persulfate by low-valence transition metal ions and their compounds is the earliest reported and most widely studied activation method, but it faces high costs caused by excessive metal dosage, leakage of metal ions, increased chroma of effluent, A series of problems such as sludge disposal [4-5]

Method used

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  • Metal monatomic catalyst as well as preparation method and application thereof
  • Metal monatomic catalyst as well as preparation method and application thereof
  • Metal monatomic catalyst as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Under the atmosphere of high-purity Ar gas, Ti 3 AlC 2 Ceramic / CuCl 2 The mixed powder with a molar ratio of 1:10 was reacted at 900 °C for 48 h, washed with 3M HCl for 24 h, centrifuged, and freeze-dried to obtain the catalyst Cu@Ti loaded with single-atom Cu 3 C 2 (The loading of monoatomic Cu was determined to be 1.8% according to the EDS spectrum). Using a five-digit analytical balance, 20 mg of the catalyst loaded with single-atom Cu was weighed and added to a mixed solution (1000 mL) of 3 mM potassium persulfate (PMS) and 10 μM sulfamethoxazole (SMX) to initiate the reaction. During the reaction, the solution was stirred (500 rpm) using a magnetic stirrer to suspend the catalyst particles in the solution. Use a pipette gun to measure 1 mL of the solution at different time points, quickly filter the sample with a 0.22 μm filter membrane, add it to a liquid phase vial previously filled with 100 μL of methanol and ascorbic acid, and use high performance liquid ch...

Embodiment 2

[0045] In high purity N 2 Atmosphere, Ti 2 AlN ceramics / Co(NO 3 ) 2 The mixed powder with a molar ratio of 1:0.5 was reacted at 1000°C for 48 hours, using 5M HNO 3 The powder was washed for 10 h, centrifuged, and freeze-dried to obtain the catalyst Co@Ti loaded with single-atom Co 2 N (1.3% loading of monoatomic Co determined from EDS spectrum). Using a five-digit analytical balance, 20 mg of the catalyst loaded with monoatomic Co was weighed, and added to a mixed solution (1000 mL) of 2 mM PMS and 10 μM SMX to initiate the reaction. During the reaction, the solution was stirred (500 rpm) using a magnetic stirrer to suspend the catalyst particles in the solution. Use a pipette gun to measure 1 mL of the solution at different time points, quickly filter the sample with a 0.22 μm filter membrane, add it to a liquid phase vial previously filled with 100 μL of methanol and ascorbic acid, and use high performance liquid chromatography to determine the SMX concentration. The r...

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PUM

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Abstract

The invention relates to a metal monatomic catalyst as well as a preparation method and application thereof, and belongs to the field of environmental protection. According to the preparation method of the metal monatomic catalyst, MAX-based ceramic powder with the chemical formula of Mn + 1AXn and inorganic salt powder of metal B are taken as raw materials, and the metal monatomic catalyst is prepared by using According to the method, anchoring preparation of the monatomic catalyst is achieved through a one-step method, and complex doping treatment does not need to be conducted on the carrier. Compared with an existing method for activating persulfate through transition metal ions and compounds of the transition metal ions, the method has the advantages that the adding amount of transition metal is remarkably reduced, and the problems of metal ion leakage, effluent chromaticity increase and sludge disposal can be solved.

Description

technical field [0001] The invention relates to a metal single-atom catalyst and its preparation method and application, belonging to the field of environmental protection. Background technique [0002] Traditional water supply (coagulation-sedimentation-filtration-disinfection) and sewage (activated sludge method) treatment processes are not effective in treating refractory organic pollutants frequently detected in water bodies, such as antibiotics, personal care products, and synthetic pesticides. Good [1-2]. Frequently detected refractory organic pollutants in water bodies not only affect the recycling of water resources, but also pose a potential risk of damage to animal and plant health[1-3]. [0003] Persulfate advanced oxidation technology has been proved to be able to quickly remove refractory organic pollutants in water[3]. Among them, activation of persulfate by low-valence transition metal ions and their compounds is the earliest reported and most widely studied...

Claims

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Application Information

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IPC IPC(8): B01J27/22B01J23/72B01J27/24B01J23/75C02F1/72C02F101/38C02F101/34
CPCB01J27/22B01J23/72B01J27/24B01J23/75C02F1/725C02F2101/40C02F2101/38C02F2101/34
Inventor 李长平宋浩然王玉伟李琢祖道远
Owner DONGGUAN UNIV OF TECH
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