Copper oxide nano catalytic membrane for catalyzing persulfate to degrade organic wastewater and preparation method thereof

A nano-catalysis, persulfate technology, applied in chemical instruments and methods, energy and wastewater treatment, chemical/physical processes, etc., can solve the problems of slow mass transfer efficiency, reduced catalytic activity of catalytic reactions, and low number of metal sites, etc. Achieve the effect of preventing aggregation, uniform and sufficient mass transfer, and uniform pore size distribution

Active Publication Date: 2020-07-28
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the natural aggregation tendency of metal catalysts, the number of metal sites exposed by supported metal catalysts is small, and the mass transfer efficiency is slow, which reduces the catalytic activity in catalytic reactions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation of copper oxide nanocatalytic membrane: Dissolve 1.28g of copper acetate and 0.87g of hexadecyltrimethylammonium bromide in 20mL of n-methylpyrrolidone solvent, and ultrasonically treat at 65°C until a clear and uniform sol is obtained. , transfer the reaction solution to a polytetrafluoroethylene autoclave, then immerse the AAO (20-30nm) film into the sol, react at 180°C for 4 hours, wait for the reaction kettle to cool down to room temperature naturally, and take out the AAO film after reaction , rinsed with deionized water, dried, and then calcined at 400°C for 2h to obtain a copper oxide nanocatalytic membrane.

[0027] Sodium persulfate is added to the wastewater solution with a rhodamine B concentration of 30mg / L to make the concentration in the mixed solution 1.0mmol / L. In the terminal filtration mode, use a peristaltic pump to pump the mixed solution into the Nano-catalyzed membrane filter with a flow rate of 0.5mL / min. After one filtration, the res...

Embodiment 2

[0029] The preparation method of the nano-catalyzed film of copper oxide is the same as that in Example 1. The difference is that 1.6g of copper acetate and 1.09g of cetyltrimethylammonium bromide are added.

[0030] Potassium hydrogen persulfate is added to the wastewater solution with a methyl orange concentration of 30mg / L to make the concentration in the mixed solution 5.0mmol / L. In the terminal filtration mode, use a peristaltic pump to pump the mixed solution into the The filter of the copper nano-catalyzed membrane has a flow rate of 0.8mL / min, and after one filtration, the residence time is 1s, and the removal rate of the pollutant reaches more than 92%.

Embodiment 3

[0032] The preparation method of the copper oxide nano-catalytic membrane is the same as in Example 1, except that the pore diameter of the AAO membrane is 50-60 nm.

[0033] Sodium persulfate was added to the wastewater solution with a Rhodamine B concentration of 20mg / L to make the concentration in the mixed solution 1.0mmol / L. The filter with nano-catalyzed membrane has a flow rate of 0.5mL / min, and after one filtration, the residence time is 1.2s, and the removal rate of this pollutant reaches more than 93%.

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PUM

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Abstract

The invention discloses a copper oxide nano catalytic membrane for catalyzing persulfate to degrade organic wastewater and a preparation method of the copper oxide nano catalytic membrane, and belongsto the technical field of wastewater treatment. An anodic aluminum oxide membrane (AAO) serves as a template, copper oxide is loaded on the inner wall of a nanopore channel of the AAO membrane through a sol-gel method, copper oxide circular nanotubes arranged in order are formed, and therefore the copper oxide nanotube array catalytic membrane is obtained. Persulfate is used as an oxidizing agent, and can be activated into a strong oxidizing substance when passing through a copper oxide film, so that degradation and removal of organic pollutants in water are realized. Compared with a liquid-phase catalytic reaction, the nano catalytic membrane catalytic system strengthens the mass transfer diffusion of pollutants and persulfate to the surface of the copper oxide catalyst due to the nano confinement effect, improves the production of oxidizing substances, and shows higher catalytic efficiency.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a copper oxide nano-catalytic membrane for catalyzing persulfate to degrade organic waste water and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of my country's economy, the discharge of industrial wastewater has gradually increased. It mainly includes pharmaceutical industry wastewater, refining and chemical wastewater, printing and dyeing wastewater, electroplating wastewater, etc. For industrial wastewater, according to the difficulty of biodegradation, it is generally divided into easy biodegradable, biodegradable and difficult biodegradable wastewater. Most of the refractory biodegradable wastewater contains macromolecular organic substances such as polycyclic aromatic hydrocarbons, halogenated hydrocarbons, and heterocyclic compounds. These organic pollutants and their metabolites are not ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72B01J35/00B01J35/02B01J35/10C02F1/72C02F101/30
CPCB01J23/72B01J35/006B01J35/0073B01J35/02B01J35/10B01J35/1014C02F1/722C02F1/725C02F2101/30Y02W10/37
Inventor 江波苏晴宁亚男李朝牛庆赫孟宪哲刘奕捷齐元峰
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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