A kind of composite anode electrode and its preparation method and application

A composite anode and electrode technology, applied in the direction of electrodes, electrode shapes/types, chemical instruments and methods, etc., can solve the problems of non-reusable, easy inactivation, poor stability of free enzyme treatment wastewater, etc., to achieve simple operation and improve efficiency , The effect of improving the efficiency of wastewater treatment

Active Publication Date: 2017-06-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the free enzyme treatment of wastewater has disadvantages such as poor stability, easy inactivation, and non-reusability, so it needs to be immobilized.

Method used

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  • A kind of composite anode electrode and its preparation method and application
  • A kind of composite anode electrode and its preparation method and application
  • A kind of composite anode electrode and its preparation method and application

Examples

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preparation example Construction

[0025] According to the preparation method of a kind of composite anode electrode provided by the present invention, the method comprises the following steps:

[0026] (1) Pretreating the metal substrate in an acidic chemical cleaning solution, the metal substrate being one or more of titanium, zirconium and nickel;

[0027] (2) Dissolving the metal oxide mesoporous material and oxide active component precursor in an alcohol solvent to make a coating liquid, wherein the metal oxide mesoporous material is CeO 2 、Co 3 o 4 , ZrO 2 and SnO 2 One or more of them, the product of the oxide active component precursor after thermal decomposition is the oxide active component;

[0028] (3) spraying or brushing the coating solution prepared in step (2) on the metal substrate and calcining it to prepare a composite anode electrode precursor; and

[0029] (4) Immerse the composite anode electrode precursor prepared in step (3) in a laccase solution to form a composite anode electrode ...

Embodiment 1

[0060] This embodiment is to illustrate the Ti / SnO prepared by the method of the present invention 2 -Mesoporous CeO 2 - Sumac laccase composite anode electrode

[0061] 1) Metal substrate pretreatment:

[0062] Polish the titanium (porous) surface with sandpaper, then put it into 0.05mol / L oxalic acid solution, boil for 20min, wash with distilled water and set aside.

[0063] 2) Metal oxide mesoporous material CeO 2 Preparation of:

[0064] (a) Disperse 2g of SBA-15 in 20mL of absolute ethanol, stir evenly, add 5mL of mercaptan and 10g of cerium nitrate in turn, stir at room temperature for 24h, evaporate the solvent to obtain -SH modified CeO 2 / SiO 2 composite materials;

[0065] (b) Calcining the composite material at 600°C for 3h;

[0066] (c) Remove the SBA-15 template with 60 mL of 1.0 mol / L HF solution, stir at room temperature for 24 h, centrifuge, wash, and dry to obtain the -SH-modified metal oxide mesoporous material CeO 2 . mesoporous CeO 2 The specific ...

Embodiment 2

[0073] This embodiment is to illustrate the Zr / SnO prepared by the method of the present invention 2 -Mesoporous Co 3 o 4 -Mesoporous CeO 2 - Bacterial Laccase Composite Anode Electrode

[0074] 1) Metal substrate pretreatment:

[0075] Polish the surface of zirconium (metal mesh) with sandpaper, then put it into 50% (volume) mixed acid solution (phosphoric acid: hydrochloric acid = 2:1), soak for 30min, wash with distilled water and set aside.

[0076] 2) Mesoporous Co 3 o 4 -Mesoporous CeO 2 Preparation of complex:

[0077] (a) Disperse 2g of SBA-15 in 30mL of absolute ethanol and stir well; add 10g of 3-aminopropyltriethoxysilane APTES while stirring. After stirring evenly, add 10g of cobalt nitrate and 10g of cerium nitrate successively, after stirring at room temperature for 24h, evaporate the solvent to obtain -NH 2 Modified Co 3 o 4 -CeO 2 composite materials;

[0078] (b) Calcining the composite material at 600°C for 2h;

[0079] (c) Use 75mL of 1.0mol / L ...

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Abstract

The invention discloses a composite anode electrode and a preparation method thereof, wherein the composite anode electrode includes a metal substrate and a coating adhering thereto. The metal substrate comprises one or more from titanium, zirconium and nickel. The coating includes an oxide active component, a metal oxide mesoporous material and laccase and is 1-15 [mu]m in thickness, preferably 6-10 [mu]m in thickness. The metal oxide mesoporous material comprises one or more from CeO2, Co3O4, ZrO2 and SnO2. The oxide active component is a product formed through thermo-decomposition of an oxide active component precursor. According to the invention, with the composite anode electrode prepared through the preparation method as an anode and stainless steel as a cathode, refractory pollutants in industrial waste water is subjected to oxidizing degradation treatment with the voltage controlled to be 5-30 V and the electrolysis time controlled to be 1-5 h, thereby completely converting or degrading the refractory pollutants, wherein the COD removal rate is not less than 95% and the ratio of BOD5 / CODcr is not less than 0.3.

Description

technical field [0001] The present invention relates to a composite anode electrode, in particular, the present invention relates to a composite anode electrode for sewage treatment, a method for preparing the composite anode electrode, a composite anode electrode prepared by the preparation method, and the composite anode electrode and the composite anode electrode The application of the composite anode electrode prepared by the preparation method in sewage treatment. Background technique [0002] With the acceleration of industrialization and urbanization, the discharge of urban sewage is increasing. The effect of sewage treatment will directly affect the quality of people's living environment and the sustainable development of cities. The existing sewage treatment technology can be divided into three categories according to the principle of the method: physical method, chemical method and biological method. Due to the wide variety of pollutants, especially the high toxi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/03C25B11/10C02F3/00C02F1/461
Inventor 张化冰郦和生魏新谢文州杨玉商宜美
Owner CHINA PETROLEUM & CHEM CORP
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