Preparation method and application of 3D printing monolithic catalyst applied to Fenton-like/persulfate system

A monolithic catalyst, 3D printing technology, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problem of reducing metal ions Problems such as activation performance, difficulty in recycling metal ions, and increased demand for metal ions, etc., to achieve the effects of easy recycling and reuse, high structural controllability, and controllable structure

Active Publication Date: 2021-08-24
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, homogeneous catalytic systems have obvious limitations
First, metal ions are difficult to recycle in the reaction system
Second, when the high-concentration antibiotic wastewater is effectively removed, the demand for metal ions increases significantly, which leads to a large amount of metal ions remaining in the reaction system, causing secondary pollution
Third, the existence form of metal ions in water is greatly affected by pH and other coexisting substances. Metal ions may precipitate under alkaline conditions, while hydrated species will form under acidic conditions, reducing the activation performance of metal ions.
However, these nanoparticulate catalysts have a limited number of cycles and are difficult to separate from the system. They must be separated and recovered by post-treatment methods such as filtration, centrifugation, and flocculation, which limits their application.

Method used

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  • Preparation method and application of 3D printing monolithic catalyst applied to Fenton-like/persulfate system
  • Preparation method and application of 3D printing monolithic catalyst applied to Fenton-like/persulfate system
  • Preparation method and application of 3D printing monolithic catalyst applied to Fenton-like/persulfate system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Put 0.1g of anhydrous copper acetate into 50mL of pure water to obtain a transparent and clear solution. Drop into 8.0mL0.15mol / L N 2 h 4 ·H 2 O solution and stirred. Then the precipitate was separated by centrifugation, washed several times with pure water and absolute ethanol, and dried in an oven for several hours to obtain metal nanomaterials.

[0035] (2) 80wt% of UV curable resin, 18wt% of polyoxyethylene ether and 2wt% of metal nanomaterials were mixed and uniformly stirred, and the loading amount of metal nanomaterials was controlled to be 0.2%. Pour the mixture into the resin tank of the SLA 3D printer, and load the STL file of the ordered mesh porous cylinder structure into the slicing software, and print according to the set model. Immediately clean the uncured resin on the surface of the finished printed matter with ethanol and pure water, and after drying naturally, use N 2 As a protective gas, after calcination at 200 °C for 2 h, in N 2 Cooled to r...

Embodiment 2

[0038] (1) Put 0.1g of anhydrous ferric chloride into 50mL of pure water to obtain a transparent and clear solution. Add 8.0 mL of 0.15 mol / L sodium borohydride solution dropwise and stir. Then the precipitate was separated by centrifugation, washed several times with pure water and absolute ethanol, and dried in an oven for several hours to obtain metal nanomaterials.

[0039] (2) 80wt% of UV curable resin, 18wt% of isopropanol and 2wt% of metal nanomaterials were mixed and uniformly stirred, and the loading amount of metal nanomaterials was controlled to be 0.2%. Pour the mixture into the resin tank of the SLA 3D printer, and load the STL file of the ordered mesh porous cylinder structure into the slicing software, and print according to the set model. Immediately clean the uncured resin on the surface of the finished printed matter with ethanol and pure water, and after drying naturally, use N 2 As a protective gas, after calcination at 200 °C for 2 h, in N 2 Cooled to r...

Embodiment 3

[0042] (1) Put 0.1 g of anhydrous cobalt chloride into 40 mL of pure water to obtain a transparent and clear solution. Add 8.0 mL of 0.1 mol / L sodium citrate solution dropwise and stir. Then the precipitate was separated by centrifugation, washed several times with pure water and absolute ethanol, and dried in an oven for several hours to obtain metal nanomaterials.

[0043] (2) 80wt% of UV curable resin, 18wt% of isopropanol and 2wt% of metal nanomaterials were mixed and uniformly stirred, and the loading amount of metal nanomaterials was controlled to be 0.2%. Pour the mixture into the resin tank of the SLA 3D printer, and load the STL file of the ordered mesh porous cylinder structure into the slicing software, and print according to the set model. Immediately clean the uncured resin on the surface of the finished printed matter with ethanol and pure water, and after drying naturally, use N 2 As a protective gas, after calcination at 200 °C for 2 h, in N 2 Cooled to room...

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Abstract

The invention discloses a preparation method and application of a 3D printing monolithic catalyst applied to a Fenton-like/persulfate system. The preparation method comprises the steps that a chemical reduction method is adopted, metal salt serves as a precursor, a transition metal nano material is prepared through reduction, then the transition metal nano material is loaded on a 3D printing carrier, and the monolithic catalyst applicable to the Fenton-like/persulfate system is obtained. The active metal oxide nano material is in an irregular polyhedron shape, a large number of gully-shaped cracks are formed in the surface, the roughness and the specific surface area of the active metal oxide nano material are effectively increased due to surface defects, and more active components are provided. The catalyst provided by the invention can quickly and efficiently remove refractory organics in wastewater. The prepared monolithic catalyst has the advantages of being high in catalytic activity, good in stability, controllable in structure, beneficial to recovery and the like in a Fenton-like/persulfate system, and can be applied to the fields of sewage treatment and the like.

Description

technical field [0001] The invention relates to a preparation method and application of a catalyst, in particular to a preparation method and application of a 3D printed monolithic catalyst applied to a Fenton-like / persulfate system. Background technique [0002] In recent years, with the rapid development of the medical industry, the widespread use of antibiotics has caused a large amount of antibiotic residues to be discharged into water bodies around the world, causing water environmental pollution. The presence of antibiotics in the environment may lead to the generation of antibiotic resistance genes (ARGs) and the acquisition of resistance by microbial pathogens, resulting in the emergence of antibiotic-resistant bacteria or multi-antibiotic-resistant bacteria, posing a significant threat to human health and ecosystems. Generally, antibiotics are refractory organic substances that are difficult to be metabolized by humans and animals, so it is extremely important to se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J23/75B01J23/72B01J23/10B01J31/06B33Y70/10B33Y80/00C02F1/72C02F1/74C02F101/30C02F101/38
CPCB01J23/72B01J23/745B01J23/75B01J23/10B33Y70/10B33Y80/00B01J31/069C02F1/725C02F1/74C02F1/722C02F2101/38C02F2101/30C02F2305/026Y02W10/37
Inventor 于杨谢宇星黄菲孙一斐何志琴
Owner NANJING NORMAL UNIVERSITY
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