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Catalyst for degrading phenol by adsorption-catalytic oxidation synergy and preparation method and application thereof

A technology of synergistic degradation and catalytic oxidation, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve the problems of poor timeliness, high reaction temperature and high treatment cost of wastewater treatment, It achieves the effects of remarkable catalytic degradation effect, simple preparation method and cost reduction

Inactive Publication Date: 2017-10-20
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: First, when hydrogen peroxide is added, air must be blown in, and the energy consumption is high, which will increase the cost of wastewater treatment
Secondly, during the oxidation treatment, the temperature of the mixed system is preferably 50-60°C, the reaction temperature is high, and the energy consumption is high; finally, the oxidation reaction speed of phenol is slow, the reaction time is long, and the timeliness of wastewater treatment is poor
[0005] To sum up, the catalytic oxidation process in the treatment of phenol-containing wastewater in the prior art requires the introduction of air, which leads to high treatment costs, and the low treatment efficiency caused by the slow oxidation reaction speed of phenol, and there is still a lack of effective solutions.

Method used

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  • Catalyst for degrading phenol by adsorption-catalytic oxidation synergy and preparation method and application thereof
  • Catalyst for degrading phenol by adsorption-catalytic oxidation synergy and preparation method and application thereof
  • Catalyst for degrading phenol by adsorption-catalytic oxidation synergy and preparation method and application thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0051] A preparation method of a catalyst for adsorption-catalytic oxidation synergistically degrading phenol, comprising the following steps:

[0052](1) Using expanded graphite as a carbon source to prepare graphene oxide; the specific preparation method is: slowly add 18g of potassium permanganate and 3g of sodium nitrate to 138ml of concentrated sulfuric acid at 0°C in an ice bath, and simultaneously use 500rpm Mechanical stirring at a high speed, after the potassium permanganate and sodium nitrate are completely dissolved, slowly add 3g of expanded graphite, after the expanded graphite is completely stirred evenly, seal it and place it in the refrigerator, and keep it warm at 0°C for 24h; then transfer the reaction system to Stir and react in a constant temperature oil bath at 35°C for 30 minutes, then slowly add deionized water dropwise while raising the temperature, and add a total of 300ml of deionized water dropwise, at this time the temperature just rises to 98°C, kee...

Embodiment 2

[0073] A preparation method of a catalyst for adsorption-catalytic oxidation synergistically degrading phenol, comprising the following steps:

[0074] (1) Using expanded graphite as a carbon source to prepare graphene oxide; the specific preparation method is: slowly add 18g of potassium permanganate and 3g of sodium nitrate to 138ml of concentrated sulfuric acid at 0°C in an ice bath, and simultaneously use 200rpm Mechanical stirring at a high speed, after the potassium permanganate and sodium nitrate are completely dissolved, slowly add 3g of expanded graphite, after the expanded graphite is completely stirred evenly, seal it and place it in the refrigerator, and keep it warm at 0°C for 24h; then transfer the reaction system to Stir and react in a constant temperature oil bath at 35°C for 30 minutes, then slowly add deionized water dropwise while raising the temperature, and add a total of 300ml of deionized water dropwise, at this time the temperature just rises to 98°C, ke...

Embodiment 3

[0082] A preparation method of a catalyst for adsorption-catalytic oxidation synergistically degrading phenol, comprising the following steps:

[0083] (1) Using expanded graphite as a carbon source to prepare graphene oxide; the specific preparation method is: slowly add 18g of potassium permanganate and 3g of sodium nitrate to 138ml of concentrated sulfuric acid at 0°C in an ice bath, and simultaneously use 300rpm Mechanical stirring at a high speed, after the potassium permanganate and sodium nitrate are completely dissolved, slowly add 3g of expanded graphite, after the expanded graphite is completely stirred evenly, seal it and place it in the refrigerator, and keep it warm at 0°C for 24h; then transfer the reaction system to Stir and react in a constant temperature oil bath at 35°C for 30 minutes, then slowly add deionized water dropwise while raising the temperature, and add a total of 300ml of deionized water dropwise, at this time the temperature just rises to 98°C, ke...

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Abstract

The invention discloses a catalyst for degrading phenol by adsorption-catalytic oxidation synergy and a preparation method and application thereof. Nitrogen-doped graphene aerogel is used for processing phenolic waste water; gel is taken as the catalyst, persulfate is added to carry out catalytic oxidation treatment on phenol aqueous solution for 20-60min, and the degradation rate of phenol is 100%; after the catalyst is subjected to centrifugation, washing and drying, the catalyst can be reused. The preparation method for the catalyst is simple in preparation method and high in catalytic efficiency, only oxidizing agent needs to be added into a catalytic oxidation process, and air does not need to be blasted. In addition, at a normal temperature, the catalytic effect of the catalyst is obvious, the temperature of a system does not need to be improved, and energy consumption can be lowered. Finally, the system carries out catalytic oxidation treatment for 30min, and a phenol degradation rate is 100%.

Description

technical field [0001] The invention belongs to the technical field of material synthesis and water treatment, and in particular relates to a catalyst for synergistic degradation of phenol by adsorption-catalytic oxidation and its preparation method and application. Background technique [0002] At present, the discharge of organic wastewater is one of the important problems faced by my country's industrial production process. As the main wastewater produced in the petrochemical industry, phenol-containing wastewater is listed as a key solution in my country's water pollution control because of its high toxicity and high pollution. One of the harmful wastewater. Phenol pollutants are the main pollutants of phenol-containing wastewater. They are protoplasmic poisons and have toxic effects on all living organisms. Even at low concentrations, they can be harmful to human liver, kidney, Hazardous to the lungs and vascular system, it is listed as a priority pollutant by many coun...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30B01J27/24C02F1/28C02F1/72C02F101/34
CPCB01J20/20C02F1/283C02F1/725B01J20/28047B01J27/24C02F2101/345B01J35/23
Inventor 慈立杰任小花
Owner SHANDONG UNIV
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