Electrocatalysis coupled advanced oxidation system and application thereof

An advanced oxidation and electrocatalysis technology, applied in chemical instruments and methods, contaminated groundwater/leachate treatment, water pollutants, etc., can solve the problems that chloride ions are not deeply affected, and chloride ions are not mentioned and studied , to achieve the effects of good catalytic effect, easy recycling and cheap materials

Active Publication Date: 2019-12-03
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the research on the influence of chloride ions is not in-depth. In some cases, whether the chloride ions themselves are activated by PMS has not been mentioned and studied.

Method used

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  • Electrocatalysis coupled advanced oxidation system and application thereof
  • Electrocatalysis coupled advanced oxidation system and application thereof
  • Electrocatalysis coupled advanced oxidation system and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Study on the Effect of Different Concentrations of NaCl in Anolyte on the Degradation Rate of p-Nitrophenol

[0078] As a three-dimensional hexagonal star Co 3 o 4 As the anode material, the three-dimensional hexagonal star-shaped Co 3 o 4 Attached to the conductive glass as the anode, the platinum sheet as the cathode, and Ag / AgCl as the reference electrode; add 70mL of anolyte to the series of anode cells, and the concentration of sodium chloride in the anolyte is 10, 20, 30, 50 and 100mmol / L, the concentration of potassium persulfate is 0.01mmol / L, and the concentration of p-nitrophenol is 10mg / L; 70mL of sodium chloride solution with a concentration of 50mmol / L is added to the cathode cell, and the Degradation; Applied bias voltage is 2.5V vs Ag / AgCl;

[0079] The anode is attached with a three-dimensional six-pointed star-shaped Co 3 o 4 The conductive glass is prepared by the following steps:

[0080] Dissolve 2mmol of cobalt nitrate hexahydrate in 40mL of ...

Embodiment 2

[0083] The effect of different concentrations of potassium hydrogen persulfate in the anolyte on the degradation rate of p-nitrophenol was studied using three-dimensional hexagonal star-shaped Co 3 o 4 As the anode material, the three-dimensional hexagonal star-shaped Co 3 o 4 Attached to the conductive glass as the anode, the platinum sheet as the cathode, and Ag / AgCl as the reference electrode; add 70mL of anolyte to the series of anode cells, and the concentration of sodium chloride in the anolyte is 50mmol / L. The concentration of potassium bisulfate is 0.01, 0.32, 1, 4, 8 and 16mmol / L respectively, and the concentration of p-nitrophenol is 10mg / L; add 70mL of sodium chloride solution with a concentration of 50mmol / L in the cathode pool as the cathode Electrolyte, energized for degradation; applied bias voltage is 2.5V vs Ag / AgCl;

[0084] The preparation method of the anode is the same as that of Example 1.

[0085] figure 2 It is the degradation diagram of p-nitroph...

Embodiment 3

[0088] As a three-dimensional hexagonal star Co 3 o 4 As the anode material, the three-dimensional hexagonal star-shaped Co 3 o 4 Attached to the conductive glass as the anode, the platinum sheet as the cathode, and Ag / AgCl as the reference electrode; add 70mL of anolyte to the anode cell, the concentration of sodium chloride in the anolyte is 50mmol / L, persulfuric acid The concentration of potassium hydrogen is 0.01mmol / L, and the concentration of p-nitrophenol is 10mg / L; 70mL of sodium chloride solution with a concentration of 50mmol / L is added to the cathode cell, and power is applied for degradation for 1h; the applied bias voltage is 2.5V vs Ag / AgCl;

[0089] The preparation method of the anode is the same as that of Example 1.

[0090] image 3 The ultraviolet-visible full-band diagram of the electrocatalytic coupled advanced oxidation system degrading p-nitrophenol for 1 h is provided for this example. From image 3 It can be seen that when the applied bias volta...

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Abstract

The invention provides an electrocatalysis coupled advanced oxidation system and an application thereof, and belongs to the technical field of sewage treatment. According to the electrocatalysis coupled advanced oxidation system, advanced oxidation and electrocatalysis are coupled on an anode, and a three-dimensional hexagonal star-shaped Co3O4 anode material can activate potassium persulfate to generate sulfate free radicals, can also electrocatalytically oxidize chloride ions to generate hypochlorous acid active substances, and can electrocatalytically catalyze an oxidation reaction of chloride ions and potassium persulfate to generate hypochlorous acid at the same time, so that organic pollutants can be efficiently and rapidly mineralized into CO2 and H2O.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to an electrocatalytic coupled advanced oxidation system and its application. Background technique [0002] Advanced oxidation processes (AOPs) generally include the following categories: photochemical oxidation, catalytic wet oxidation, sonochemical oxidation, ozone oxidation, electrochemical oxidation, and Fenton oxidation. Recently, many studies have focused on the advanced oxidation process of variable valence metal activated persulfates. Among the numerous variable valence metals, metal Co has the best activation effect. Therefore, many researchers currently choose the most efficient variable valence metal Co as the catalyst material. In order to avoid the secondary pollution of cobalt ions, the activation of persulfate to degrade organic pollutants by a large number of heterogeneous cobalt oxides has become a current research hotspot. For example, Fan e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/467C02F101/30C02F101/38C02F103/06
CPCC02F1/46109C02F1/4674C02F2001/46133C02F2101/30C02F2101/38C02F2103/06
Inventor 邹建平朱蒙刘闪闪罗胜联胡志威陈伊男傅震杨锐杰戢元星周兴望
Owner NANCHANG HANGKONG UNIVERSITY
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