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A kind of cus-cuo-cn peroxide composite catalyst for advanced oxidation technology and its preparation method and application

An advanced oxidation technology and composite catalyst technology, which is applied in the field of wastewater treatment, can solve the problems of low effective utilization rate of oxidants, obstacles to wide application, and narrow pH range, etc., and achieve good industrial promotion and application prospects, high-efficiency catalysis, and easy operation.

Active Publication Date: 2022-04-08
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the classic Fenton reaction has been widely used to degrade pollutants, problems such as its narrow pH range, iron sludge, and secondary pollution still exist, especially the low effective utilization of oxidants leads to high costs in practical applications. hinder its widespread application

Method used

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  • A kind of cus-cuo-cn peroxide composite catalyst for advanced oxidation technology and its preparation method and application
  • A kind of cus-cuo-cn peroxide composite catalyst for advanced oxidation technology and its preparation method and application
  • A kind of cus-cuo-cn peroxide composite catalyst for advanced oxidation technology and its preparation method and application

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preparation example Construction

[0034] The embodiment of the present invention provides a method for preparing CuS-CuO-CN peroxide composite catalyst of advanced oxidation technology, and the steps specifically include:

[0035] Mix the organic copper source and thiourea in a hydroxyl-containing organic solvent at 5-35°C, the mass ratio of the copper element in the organic copper source to thiourea is (0.01-0.5):1, evaporate to dryness to In a crucible with a cover, move the crucible to a box-type resistance furnace and heat it up to 400-500°C for 1-4 hours. After the product is naturally cooled, grind the resultant to obtain CuS-CuO-CN peroxidation for advanced oxidation technology. composite catalyst.

[0036] The composite catalyst includes a first phase formed by CuO, a second phase formed by CuS, and a third phase formed by CN, the interfaces of the first phase and the second phase contact each other to form a heterojunction, the first phase and the second phase The interfaces of the three phases conta...

Embodiment 1

[0040] This embodiment provides a method for preparing CuS-CuO-CN peroxide composite catalyst of advanced oxidation technology, and the steps specifically include:

[0041] Mix copper acetate and thiourea in an ethanol solvent at room temperature, the mass ratio of the copper element in the copper acetate to thiourea is 0.01:1, that is, based on the mass percentage of thiourea, the copper addition is 1% , put it in a crucible with a cover after drying, move the crucible to a box-type resistance furnace and heat it up to 450°C for 2 hours, and grind the product after it is naturally cooled to obtain CuS-CuO-CN process for advanced oxidation technology. oxide composite catalyst.

[0042] Further, this embodiment also adjusted the amount of copper added to obtain CuS-CuO-CN peroxide composite catalysts with different copper additions. Specifically, the mass ratio of copper in copper acetate to thiourea was adjusted 0:1, 0.03:1, 0.05:1, 0.1:1, 0.15:1, that is, based on the mass p...

Embodiment 2

[0046] In this example, 6 groups of CuS-CuO-CN peroxide composite catalysts prepared in Example 1 were used to catalyze the degradation of RhB by PMS, and the effects were compared. The specific catalytic process includes:

[0047] Take 50ml of 20mg / L rhodamine B aqueous solution with pH=5 as the model pollutant, the catalyst concentration is 0.5g / L, and the oxidant (PMS) concentration is 200mg / L. 0.5ml samples were taken at given time intervals, and the pollutant content was detected using UV-Vis to evaluate the catalytic performance of the composite catalyst.

[0048] The effects of six groups of CuS-CuO-CN peroxide composite catalysts on the degradation of rhodamine B by PMS are as follows: figure 2 shown. From figure 2 It can be seen that the degradation performance of the CuS-CuO-CN peroxide composite catalyst obtained when the copper addition is 3% is the best.

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Abstract

The present invention provides a kind of preparation method of CuS-CuO-CN peroxide composite catalyst used in advanced oxidation technology, the steps include: mixing organic copper source and thiourea in organic solvent containing hydroxyl group, heating up to volatilize the solvent, Then raise the temperature to 400-500° C. for 1-4 hours, cool and grind to obtain CuS-CuO-CN peroxide composite catalyst for advanced oxidation technology. A CuS-CuO-CN peroxide composite catalyst was obtained. The heterogeneous structure of the composite catalyst can effectively improve the principle defect of monomer catalysis, and can achieve a very high oxidant utilization rate under the condition of no external energy such as light. And the CuS-CuO-CN peroxide composite catalyst has good catalytic performance, good stability, excellent pH applicability, strong adaptability in the treatment of actual wastewater, and the preparation process of the present invention is simple, possesses Good prospects for industrial promotion and application.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a CuS-CuO-CN peroxide composite catalyst used in advanced oxidation technology and its preparation method and application. Background technique [0002] With the rapid development of my country's economy, more and more toxic organic pollutants are discharged into water bodies. Because of their extremely low threshold, they have strong toxicological effects and ecological hazards, which seriously threaten human health and environmental safety. In particular, the treatment of toxic organic pollutants such as antibiotics in water, such as diclofenac sodium (Diclofenac Sodium, rhodamine B) has attracted increasing attention, and has posed severe challenges to existing water treatment technologies. [0003] Advanced oxidation technology (AOPs) has obvious advantages in the removal of toxic organic pollutants due to its strong oxidation capacity, low selectivit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C02F1/72C02F101/34C02F101/36C02F101/38
CPCB01J27/24C02F1/725C02F1/722C02F2101/34C02F2101/36C02F2101/38
Inventor 李东亚夏东升左诗语徐海明孙磊
Owner WUHAN TEXTILE UNIV
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