CN113603189A - Electro-catalytic filter membrane for removing nitrate in water and preparation method and application thereof - Google Patents
Electro-catalytic filter membrane for removing nitrate in water and preparation method and application thereof Download PDFInfo
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- CN113603189A CN113603189A CN202110749428.6A CN202110749428A CN113603189A CN 113603189 A CN113603189 A CN 113603189A CN 202110749428 A CN202110749428 A CN 202110749428A CN 113603189 A CN113603189 A CN 113603189A
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- 239000012528 membrane Substances 0.000 title claims abstract description 49
- 229910002651 NO3 Inorganic materials 0.000 title claims abstract description 43
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 title claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000010949 copper Substances 0.000 claims abstract description 12
- 239000011259 mixed solution Substances 0.000 claims abstract description 12
- 239000000243 solution Substances 0.000 claims abstract description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052802 copper Inorganic materials 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims abstract description 9
- 239000000758 substrate Substances 0.000 claims abstract description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000004140 cleaning Methods 0.000 claims abstract description 8
- FJDJVBXSSLDNJB-LNTINUHCSA-N cobalt;(z)-4-hydroxypent-3-en-2-one Chemical compound [Co].C\C(O)=C\C(C)=O.C\C(O)=C\C(C)=O.C\C(O)=C\C(C)=O FJDJVBXSSLDNJB-LNTINUHCSA-N 0.000 claims abstract description 8
- 230000009467 reduction Effects 0.000 claims abstract description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 6
- 229910052786 argon Inorganic materials 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 230000035484 reaction time Effects 0.000 claims description 7
- 229910016553 CuOx Inorganic materials 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 3
- 230000004907 flux Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 9
- 239000001301 oxygen Substances 0.000 abstract description 9
- 229910052760 oxygen Inorganic materials 0.000 abstract description 9
- 239000007772 electrode material Substances 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 229910017052 cobalt Inorganic materials 0.000 abstract description 3
- 239000010941 cobalt Substances 0.000 abstract description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 abstract description 3
- 230000005684 electric field Effects 0.000 abstract description 3
- 238000001914 filtration Methods 0.000 abstract description 3
- 238000006722 reduction reaction Methods 0.000 description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 230000027756 respiratory electron transport chain Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052723 transition metal Inorganic materials 0.000 description 2
- 150000003624 transition metals Chemical class 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4676—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electroreduction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0039—Inorganic membrane manufacture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/02—Inorganic material
- B01D71/022—Metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/02—Inorganic material
- B01D71/024—Oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/74—Iron group metals
- B01J23/75—Cobalt
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/33—Electric or magnetic properties
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46133—Electrodes characterised by the material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/163—Nitrates
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Hydrology & Water Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Inorganic Chemistry (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Catalysts (AREA)
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides an electrocatalytic filter membrane for removing nitrate in water, and a preparation method and application thereof, wherein the method comprises the following steps: cleaning and drying the copper mesh, and then adding KOH and (NH)4)2SO4In the mixed solution, after hydrothermal heating, cleaning and drying to obtain a CuO substrate filter membrane; placing the prepared CuO-based filter membraneAdding the solution into a mixed solution of dimethyl formamide and cobalt acetylacetonate, carrying out hydrothermal heating for a period of time, cleaning, drying, and then putting the product into a tubular furnace for thermal reduction under the atmosphere of argon, thus obtaining the electro-catalytic filter membrane for removing nitrate in water after heating. The invention prepares an electrocatalysis filter membrane which is rich in surface oxygen vacancies, can be used as an electrochemical electrode material and has good mechanical strength and filtering performance based on the surface reconstruction of copper and cobalt under the drive of an electric field, and solves the key technical problems of low nitrogen selectivity and poor electrochemical stability of the electrocatalysis material.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to an electrocatalytic filter membrane for removing nitrate in water, a preparation method and application thereof, which are suitable for quickly treating nitrate exceeding water and wastewater.
Background
The problems of over-standard nitrate in underground water, high nitrate in tail water caused by insufficient carbon source in urban sewage plants and the like become the challenges of water and sewage treatment. Among the nitrate removal technologies, electrochemical reduction is a water treatment technology with simple operation, low energy consumption and high treatment efficiency. The prior electrode material mainly depends on indirect electron transfer for nitrate electroreduction, namely active hydrogen is released from the surface of the electrode to reduce the nitrate. However, the problems of secondary pollution, low faraday efficiency and the like caused by reduction of nitrate to ammonia nitrogen may occur in the process, direct electron transfer is sought, and realization of high-efficiency nitrogen reduction selectivity is a hot point concerned and researched in the field of nitrate electroreduction at present.
The nitrate can be stably adsorbed in oxygen vacancies on the surface of the transition metal, and can be reduced and removed under the direct electron transfer action. However, the low-coordination atom in the oxygen vacancy neighborhood may undergo valence state change after direct electron transfer with nitrate, so that the number of oxygen vacancies on the surface of the electrode is reduced, and the electrochemical stability and the catalytic selectivity of the electrode are reduced. Therefore, the development of an electrocatalytic material with the functions of regenerating oxygen vacancies and efficiently removing nitrates is a breakthrough point for realizing the water treatment technology by the electrocatalytic reduction method at present.
Disclosure of Invention
Aiming at the defects, the invention provides the electrocatalysis filter membrane which is used for removing nitrate in water, is rich in surface oxygen vacancy and can be used as an electrochemical electrode material, and the preparation method and the application thereof, thereby solving the key technical problems of low nitrogen selectivity and poor electrochemical stability of the electrocatalysis material.
The invention provides the following technical scheme: a preparation method of an electrocatalytic filter membrane for removing nitrate in water comprises the following steps:
1) preparing a CuO substrate filter membrane: cleaning and drying the copper mesh, and then adding KOH and (NH)4)2SO4In the mixed solution, after hydrothermal heating, cleaning and drying to obtain a CuO substrate filter membrane;
2)Co-CuOxpreparing an electrocatalytic filter membrane: putting the CuO substrate filter membrane prepared in the step 1) into a mixed solution of dimethyl formamide and cobalt acetylacetonate, and washing and drying after hydrothermal heating for a period of time; putting the obtained filter membrane into a tubular furnace for thermal reduction, wherein the gas atmosphere is argon, and heating to obtain Co-CuOxAnd the filter membrane is the electro-catalytic filter membrane for removing the nitrate in the water.
Further, the mesh number of the copper mesh adopted in the step 1) is 200-500 meshes.
Further, KOH and (NH) used in the step 1)4)2SO4The concentration of KOH in the mixed solution is 1-2 mol/L, (NH)4)2SO4The concentration of (b) is 0.5 to 1 mol/L.
Further, the temperature of the hydrothermal heating in the step 1) is 80-130 ℃, and the reaction time is 4-8 hours.
Further, the volume of the dimethylformamide in the mixed solution of the dimethylformamide and the cobalt acetylacetonate adopted in the step 2) is 100-300 ml, and the mass of the cobalt acetylacetonate is 100-500 mg.
Further, the hydrothermal heating temperature of the step 2) is 150-190 ℃, and the reaction time is 2-6 h.
The invention also provides the electrocatalytic filter membrane for removing the nitrate in the water, which is prepared by the preparation method.
The invention also provides an application of the electro-catalytic filter membrane in removing nitrate in water, which comprises the following steps:
a. directly connecting the electrocatalytic filter membrane with a negative electrode, and adopting carbon cloth as an anode;
b. and applying voltage, and carrying out an electroreduction reaction when the nitrate solution is filtered by the electrocatalytic filter membrane to remove the nitrate.
Further, the reaction in the step b is carried out at the temperature of 600-900 ℃ and the heating rate of 2-6 ℃/min, and the reaction time is 1-5 h.
Furthermore, the concentration range of the nitrate solution is 5-50 mg/L (calculated by N) calculated by nitrogen element, and the filtered water flux is 60-180L/(m)2H), the working voltage of the electro-catalytic filter membrane for reducing the nitrate is-0.8 to-1.2V.
The invention has the beneficial effects that:
in the transition metal, copper and cobalt can realize dynamic surface reconstruction under the drive of an electric field. In the process, the dynamic conversion of Cu (I) and Cu (II), and the dynamic conversion of Co (II) and Co (III) can be realized, and further the cyclic regeneration of oxygen vacancies can be realized. The invention prepares an electrocatalysis filter membrane which is rich in surface oxygen vacancies and can be used as an electrochemical electrode material based on the surface reconstruction of copper and cobalt under the drive of an electric field, and solves the key technical problems of low nitrogen selectivity and poor electrochemical stability of the electrocatalysis material. Meanwhile, the electro-catalytic filter membrane has good mechanical strength and filtering performance, has obvious electro-catalytic reduction effect on nitrate, and is suitable for rapid treatment of nitrate exceeding water and wastewater.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:
FIG. 1 is a diagram of a substance of an electrocatalytic filter membrane prepared by the preparation method provided in example 1 of the present invention;
FIG. 2 is a micro-topography prepared by the preparation method provided in example 1 of the present invention.
Detailed description of the preferred embodiments
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The preparation method of the electrocatalytic filter membrane for removing nitrate in underground water in the embodiment is carried out according to the following steps:
1. preparing a CuO substrate filter membrane: after the copper mesh (300 meshes) is cleaned and dried, the copper mesh is put into 1.33mol L-1KOH and 0.665mol L-1(NH)4)2SO4Heating the mixed solution at 100 deg.C for 6 hr, cleaning, and oven drying.
2、Co-CuOxPreparation of a filter membrane: the prepared CuO substrate filter membrane is put into a mixed solution of 200ml of dimethylformamide and 300mg of cobalt acetylacetonate, and is washed and dried after hydrothermal heating for 4 hours at 170 ℃. Placing the obtained sample into a tube furnace for thermal reduction, wherein the gas atmosphere is argon, the reaction temperature is 800 ℃, and the heating rate is 5 ℃ for min-1After heating for 2h, Co-CuO can be obtainedxAnd (5) filtering the membrane. The substance is shown in FIG. 1, and the microscopic morphology of the filter is shown in FIG. 2.
Example 2
20mg L of the electrocatalytic filter membrane prepared in example 1 was filtered at a voltage ranging from-0.8V to-0.9V using the cathode and the carbon cloth as the anode-1And (calculated by N) nitrate solution, wherein the removal rate of the nitrate can reach 55% after the reaction time is 1 h.
Example 3
20mg L of the electrocatalytic filter membrane prepared in example 1 was filtered at a voltage ranging from-1.0V to-1.2V using a platinum sheet as a cathode and a platinum sheet as an anode-1The nitrate solution (counted by N) has better stability of oxygen vacancy on the surface of the filter membrane. The flux is 60-120 Lm-2h-1The removal rate of nitrate can reach 95% at most, and the nitrogen selectivity can reach 96%.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Furthermore, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims above, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Claims (10)
1. The preparation method of the electrocatalytic filter membrane for removing the nitrate in water is characterized by comprising the following steps of:
1) preparing a CuO substrate filter membrane: cleaning and drying the copper mesh, and then adding KOH and (NH)4)2SO4In the mixed solution, after hydrothermal heating, cleaning and drying to obtain a CuO substrate filter membrane;
2)Co-CuOxpreparing an electrocatalytic filter membrane: putting the CuO substrate filter membrane prepared in the step 1) into a mixed solution of dimethyl formamide and cobalt acetylacetonate, and washing and drying after hydrothermal heating for a period of time; putting the obtained filter membrane into a tubular furnace for thermal reduction, wherein the gas atmosphere is argon, and heating to obtain Co-CuOxAnd the filter membrane is the electro-catalytic filter membrane for removing the nitrate in the water.
2. The preparation method of the electrocatalytic filter membrane for removing the nitrate in the water as set forth in claim 1, wherein the mesh number of the copper mesh used in the step 1) is 200-500 mesh.
3. The method as claimed in claim 1, wherein KOH and (NH) are used in the step 1)4)2SO4The concentration of KOH in the mixed solution is 1-2 mol/L, (NH)4)2SO4The concentration of (b) is 0.5 to 1 mol/L.
4. The preparation method of the electrocatalytic filter membrane for removing the nitrate in the water as claimed in claim 1, wherein the temperature of hydrothermal heating in the step 1) is 80-130 ℃, and the reaction time is 4-8 h.
5. The preparation method of the electrocatalytic filter membrane for removing the nitrate in the water as claimed in claim 1, wherein the volume of the dimethylformamide in the mixed solution of the dimethylformamide and the cobalt acetylacetonate adopted in the step 2) is 100-300 ml, and the mass of the cobalt acetylacetonate is 100-500 mg.
6. The preparation method of the electrocatalytic filter membrane for removing the nitrate in the water as claimed in claim 1, wherein the hydrothermal heating temperature of step 2) is 150-190 ℃ and the reaction time is 2-6 h.
7. An electrocatalytic filter membrane for nitrate removal from water prepared by the method of any one of claims 1-6.
8. Use of an electrocatalytic filter membrane for nitrate removal in water according to claim 7, comprising the steps of:
a. directly connecting the electrocatalytic filter membrane with a negative electrode, and adopting carbon cloth as an anode;
b. and applying voltage, and carrying out an electroreduction reaction when the nitrate solution is filtered by the electrocatalytic filter membrane to remove the nitrate.
9. The use of claim 8, wherein the reaction of step b is carried out at a temperature of 600-900 ℃ and a temperature rise rate of 2-6 ℃/min for a reaction time of 1-5 h.
10. The use according to claim 8, wherein the nitrate solution has a concentration ranging from 5 to 50mg/L (in N) as elemental nitrogen and a filtered water flux of 60 to 180L/(m)2H), the working voltage of the electro-catalytic filter membrane for reducing the nitrate is-0.8 to-1.2V.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114011251A (en) * | 2021-12-22 | 2022-02-08 | 南京水滴智能环保装备研究院有限公司 | Conductive film for efficiently removing nitrate in water and preparation method thereof |
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| US20020136950A1 (en) * | 2001-03-21 | 2002-09-26 | Hong Gan | Electrochemical cell having an electrode with a nitrate additive in the electrode active mixture |
| JP2005000824A (en) * | 2003-06-12 | 2005-01-06 | Sanyo Electric Co Ltd | Nitrogen treatment method |
| CN106944091A (en) * | 2017-03-29 | 2017-07-14 | 平顶山学院 | A kind of photochemical catalyst Cu CuO MnO2And its preparation method and application |
| CN108671923A (en) * | 2018-05-10 | 2018-10-19 | 宁波大学 | Cu oxide/cobalt/cobalt oxide catalyst with core-casing structure and preparation method thereof for electrolysis water |
| CN110818031A (en) * | 2019-10-31 | 2020-02-21 | 燕山大学 | Preparation method of composite metal oxide functional electrode |
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|---|---|---|---|---|
| US20020136950A1 (en) * | 2001-03-21 | 2002-09-26 | Hong Gan | Electrochemical cell having an electrode with a nitrate additive in the electrode active mixture |
| JP2005000824A (en) * | 2003-06-12 | 2005-01-06 | Sanyo Electric Co Ltd | Nitrogen treatment method |
| CN106944091A (en) * | 2017-03-29 | 2017-07-14 | 平顶山学院 | A kind of photochemical catalyst Cu CuO MnO2And its preparation method and application |
| CN108671923A (en) * | 2018-05-10 | 2018-10-19 | 宁波大学 | Cu oxide/cobalt/cobalt oxide catalyst with core-casing structure and preparation method thereof for electrolysis water |
| CN110818031A (en) * | 2019-10-31 | 2020-02-21 | 燕山大学 | Preparation method of composite metal oxide functional electrode |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114011251A (en) * | 2021-12-22 | 2022-02-08 | 南京水滴智能环保装备研究院有限公司 | Conductive film for efficiently removing nitrate in water and preparation method thereof |
| CN114011251B (en) * | 2021-12-22 | 2024-01-23 | 南京水滴智能环保装备研究院有限公司 | Conductive film for efficiently removing nitrate in water and preparation method thereof |
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