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Electro-fenton cathode with active hydrogen introduced and preparation method and application thereof

A technology of active hydrogen and cathode, applied in the field of electric Fenton cathode introducing active hydrogen and its preparation, achieving the effect of simple preparation method, stable structure, and increased existence time

Active Publication Date: 2019-03-26
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, cathodes for efficiently mineralizing organic wastewater under neutral conditions using active hydrogen generated in situ from the system have rarely been reported.

Method used

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  • Electro-fenton cathode with active hydrogen introduced and preparation method and application thereof
  • Electro-fenton cathode with active hydrogen introduced and preparation method and application thereof
  • Electro-fenton cathode with active hydrogen introduced and preparation method and application thereof

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preparation example Construction

[0051] The present invention also provides a method for preparing an electric Fenton cathode introducing active hydrogen described in the above technical solution, comprising the following steps:

[0052] a) immersing the base electrode in a nickel-containing solution for electroplating to obtain a nickel-plated base electrode;

[0053] b) oxidizing the nickel-plated base electrode obtained in step a) to obtain an electric Fenton cathode with active hydrogen introduced.

[0054] In the invention, firstly, the base electrode is dipped into the solution containing nickel for electroplating to obtain the nickel-plated base electrode. In the present invention, the base electrode is the same as that described in the above technical solution, and will not be repeated here.

[0055] In the present invention, the nickel-containing solution is the electroplating solution, preferably made of NiSO with a mass ratio of (0.8-1.5): (0.02-0.05): (0.03-0.06): (2-3) 4 、NiCl 2 , boric acid a...

Embodiment 1

[0082] (1) Immerse the graphite felt in concentrated nitric acid with a mass concentration of 50%, stir it in a water bath at 60°C to 65°C for 4h, then wash it with distilled water until neutral, then put it into an oven and dry it for 3h at 60°C. Distilled water-acetone-distilled water were ultrasonically cleaned for 15 minutes, excess acetone was washed away with distilled water, and dried overnight in an oven at 60°C to obtain activated graphite felt.

[0083] (2) NiSO with a mass ratio of 1:0.0333:0.0417:2.258 4 、NiCl2 , boric acid, and distilled water were mixed, and stirred at 60°C for 0.5h to completely dissolve to obtain an electroplating solution; the activated graphite felt obtained in step (1) was immersed in the above electroplating solution as a working electrode, and a high-purity nickel plate was used as a counter electrode. At a current density of 80mA / cm 2 Under the conditions of electroplating for 13 minutes; after electroplating, wash with distilled water t...

Embodiment 2

[0089] The electric Fenton cathode that introduces active hydrogen that embodiment 1 provides is connected with anode (the ruthenium iridium coating electrode of titanium substrate) and forms loop; Get the ciprofloxacin of 25mg and be dissolved in 500mL water (do not add acid-base adjustment pH), Add ferrous sulfate to it so that its concentration is 0.2mmol / L, and add sodium sulfate to it to make its concentration 50mmol / L. Before the reaction, feed compressed air into the reactor at a rate of 0.5L / min for 30min. Mineralize the antibiotic solution at 200mA.

[0090] At the same time, the same experiment was carried out with the graphite felt cathode as the control group.

[0091] The system solution of embodiment 2 is carried out total organic carbon detection, and the result sees Figure 4 shown. Depend on Figure 4 It can be seen that the efficiency of graphite felt to mineralize antibiotics under neutral conditions after 8 hours is only 42%, while the efficiency of the ...

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Abstract

The invention provides an electro-fenton cathode with active hydrogen introduced and a preparation method and application thereof. The electro-fenton cathode with the active hydrogen introduced comprises a substrate electrode, and a Ni / NiO heterojunction loaded on the surface of the substrate electrode, and the Ni / NiO heterojunction is composed of metal nickel formed in an electroplating mode andan oxidation layer formed by the metal nickel. Compared with the prior art, the structure Ni / NiO heterojunction with the active hydrogen introduced is loaded on the surface of the substrate electrode,the existence time of the active hydrogen on the electro-fenton cathode is prolonged, accordingly, Fe<3+> can be reduced under neutral conditions, reduction of iron ions in homogeneous fenton reaction is improved, and antibiotics and other organic matter can be mineralized more thoroughly; and in addition, the Ni / NiO heterojunction hardly reacts with a solution and does not participate in reaction under neutral conditions, and accordingly, the electro-fenton cathode with the active hydrogen introduced is stable in structure, good in circulation stability and capable of operating for a long time.

Description

technical field [0001] The invention relates to the technical field of water treatment, and more specifically relates to an electric Fenton cathode introducing active hydrogen and a preparation method thereof. Background technique [0002] With the development of chemical industry, agriculture, medicine and other fields in recent years, emerging organic pollutants have gradually become a hot spot in the environmental field. The incomplete degradation of emerging organic pollutants will produce intermediate products that are difficult to fully predict, and some intermediate products are much more toxic than bulk pollutants, further increasing the harm of such organic compounds. At present, Advanced Oxidation Process (AOP) is commonly used in the treatment of antibiotic wastewater, among which the electro-Fenton method is considered to be one of the most effective methods for the complete mineralization of antibiotics in water. Its most notable feature is the in-situ generati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/12C25D5/48C25D7/00C02F1/461C02F1/72C02F101/30C02F101/34C02F101/36C02F101/38
CPCC02F1/46109C02F1/4672C02F2001/46133C02F2101/30C02F2101/34C02F2101/36C02F2101/38C02F2305/026C25D3/12C25D5/48C25D7/00
Inventor 穆杨刘晓成何传书王艺碹
Owner UNIV OF SCI & TECH OF CHINA
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