CN114229969A - Electronic control ionic membrane material for separating phosphate ions in water and preparation method thereof - Google Patents
Electronic control ionic membrane material for separating phosphate ions in water and preparation method thereof Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 74
- 239000012528 membrane Substances 0.000 title claims abstract description 69
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 title claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 claims description 25
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 24
- 239000000243 solution Substances 0.000 claims description 24
- 229910021389 graphene Inorganic materials 0.000 claims description 23
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 239000011259 mixed solution Substances 0.000 claims description 8
- 230000009467 reduction Effects 0.000 claims description 8
- -1 standing overnight Substances 0.000 claims description 8
- 239000002033 PVDF binder Substances 0.000 claims description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 7
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 7
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 5
- 239000004202 carbamide Substances 0.000 claims description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 claims description 3
- 229910000000 metal hydroxide Inorganic materials 0.000 claims description 3
- 238000009210 therapy by ultrasound Methods 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 2
- 238000001179 sorption measurement Methods 0.000 abstract description 22
- 230000008929 regeneration Effects 0.000 abstract description 10
- 238000011069 regeneration method Methods 0.000 abstract description 10
- 238000007254 oxidation reaction Methods 0.000 abstract description 8
- 230000003647 oxidation Effects 0.000 abstract description 7
- 239000002994 raw material Substances 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract description 4
- 239000007772 electrode material Substances 0.000 abstract description 3
- 239000010842 industrial wastewater Substances 0.000 abstract description 3
- 230000001351 cycling effect Effects 0.000 abstract description 2
- 229910019142 PO4 Inorganic materials 0.000 description 16
- 150000002500 ions Chemical class 0.000 description 13
- 230000008569 process Effects 0.000 description 13
- 239000010452 phosphate Substances 0.000 description 8
- 238000006722 reduction reaction Methods 0.000 description 8
- 238000000926 separation method Methods 0.000 description 8
- 238000003795 desorption Methods 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 7
- 150000001450 anions Chemical class 0.000 description 5
- 239000002131 composite material Substances 0.000 description 5
- 238000005342 ion exchange Methods 0.000 description 5
- 229910052759 nickel Inorganic materials 0.000 description 4
- 230000033116 oxidation-reduction process Effects 0.000 description 4
- 230000002441 reversible effect Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 239000003463 adsorbent Substances 0.000 description 2
- 150000001449 anionic compounds Chemical class 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011263 electroactive material Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 229910001412 inorganic anion Inorganic materials 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- 229910000162 sodium phosphate Inorganic materials 0.000 description 2
- 239000001488 sodium phosphate Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 2
- 241000446313 Lamella Species 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000005349 anion exchange Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000010841 municipal wastewater Substances 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002686 phosphate fertilizer Substances 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 239000002351 wastewater Substances 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
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
-
- 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
- C02F2101/105—Phosphorus compounds
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Electrochemistry (AREA)
- Analytical Chemistry (AREA)
- Molecular Biology (AREA)
- Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses an electronic control ionic membrane material for separating phosphate ions in water and a preparation method thereof, belonging to the technical field of ionic membrane electrode materials. According to the invention, the NiFe-LDH/rGO functional membrane material with specific selective adsorption performance is placed in industrial wastewater and other raw material liquids containing phosphate ions, when corresponding oxidation potential is applied to the membrane material, the phosphate ions in the water phase are adsorbed into the membrane material to realize enrichment of the phosphate ions, and then the phosphate ions adsorbed in the membrane are desorbed into the corresponding solution to be received by applying opposite potential, so that regeneration of the membrane material is realized. Meanwhile, the NiFe-LDH/rGO functional membrane material has good reproducibility and cycling stability, and the adsorption capacity can still reach more than 85% of the initial value after 10 cycles.
Description
Technical Field
The invention belongs to the technical field of ionic membrane electrode materials, and particularly relates to an electronic control ionic membrane material for separating phosphate ions in water and a preparation method thereof.
Background
Phosphate in water is mainly from the natural elution of rock minerals and the like, phosphate compounds introduced into fertilizer soil such as phosphate fertilizer and the like, phosphate pollutants in municipal and industrial wastewater and the like. In fact, on the one hand, phosphorus is one of the important nutrients for the growth of organisms and is not classified as an element harmful to humans at low concentrations. On the other hand, however, excessive phosphate in water bodies causes "eutrophication" of the water bodies, resulting in a large amount of growth of aquatic vegetation and strong activity of plankton, thereby consuming a large amount of dissolved oxygen in the water and causing death of aerobic organisms in the water. The net result of these processes is that the balance of the water ecosystem is disturbed.
At present, the method for removing phosphate in water mainly comprises the following steps: an adsorption method [ Chemical Engineering Journal,2017,316:33-40 ], a flocculation method [ Water Research,2018,138: 129-. Among them, the adsorption method is considered to be the most attractive method because it has advantages of high efficiency, no toxicity, simple operation, availability of various types of adsorbents, and availability in a wide concentration range. However, most of the adsorption materials have the disadvantages of slow adsorption rate, easy generation of secondary pollution in the regeneration process and the like, and the industrial application of the adsorption materials is greatly limited.
Electronically controlled ion Exchange (ESIX) technology [ Journal of Materials Chemistry A,2016,4(17): 6236-. The reversible insertion/release of ions can be controlled by adjusting the oxidation/reduction potential of the EXIMs, and the method can be used for quickly separating target ions with extremely low concentration in a solution; and the releasing process of the ions is also the regeneration process of the separation matrix, so that the secondary pollution can be eliminated to the maximum extent.
LDHs, as an effective anion adsorbent, is widely applied to the treatment of anion polluted wastewater. Particularly, the LDHs material has a unique two-dimensional layered structure, a large specific surface area, exchangeable interlayer anions and adsorbability of positive charges of laminates to anions, so the LDHs material generally has high anion exchange capacity. Furthermore, LDHs having laminates composed of transition metals such as Ni, Co, Mn, etc. generally have conductivity.
Disclosure of Invention
Aiming at the problems of low adsorption rate and low regeneration cycle rate of the existing electronic control ionic membrane material, the invention provides an electronic control ionic membrane material for separating phosphate ions in water and a preparation method thereof.
Aims to provide a method for extracting phosphate ions with environmental protection, cleanness and high efficiency, in particular to a method for preparing an electronic control ionic membrane capable of removing phosphate ions in water with high efficiency
In order to achieve the purpose, the invention adopts the following technical scheme:
the NiFe-LDH/rGO functional membrane material with specific selective adsorption performance is placed in industrial wastewater and other raw material liquids containing phosphate ions, when corresponding oxidation potential is applied to the membrane material, the phosphate ions in a water phase can be adsorbed into the membrane material, enrichment of the phosphate ions is realized, then through application of opposite potential, the phosphate ions adsorbed in the membrane are desorbed into the corresponding solution to be received, and regeneration of the membrane material is realized.
The mechanism of the electric control ion membrane electrode is as follows: NiFe-LDH/rGO functional type membrane material pair PO4 3–The ESIX process of (1) comprises two reversible processes, namely a reversible redox process of a lamella metal ion and PO4 3–Reversible ligand exchange process with O-H group.
A preparation method of an electronic control ionic membrane material for separating phosphate ions in water comprises the following steps:
and 6, mixing the NiFe-LDH/rGO hybrid material prepared in the step 5, PVDF and conductive carbon black, uniformly grinding, stirring in an NMP solvent, standing overnight, and coating on a conductive titanium mesh to obtain the electroactive nickel-iron double-metal hydroxide functional membrane material doped with reduced graphene oxide, namely an electronic control ion membrane material (NiFe-LDH/rGO functional membrane material). PVDF is used as a binder, NMP is used as a solvent, and a titanium mesh is used as a conductive substrate. The conductive matrix is reduced graphene oxide which just provides a channel for the transfer of electrons, and the NiFe-LDH is PO4 3-Provides a binding site.
Further, the concentration of nickel nitrate in the coexisting solution in the step 2 was 0.07mol/L, and the concentration of ferric nitrate was 0.03 mol/L.
Further, the coexistence solution and the graphene oxide solution in the step 3 are mixed in a ratio of 1: 1.
Further, the urea content in the mixed solution in the step 3 is excessive, and an alkaline environment is mainly provided.
Further, the temperature of the reaction kettle in the step 4 is 95 ℃, and the reaction time is 24 hours.
Further, the NiFe-LDH/rGO hybrid material, PVDF and conductive carbon black are mixed according to the volume ratio of 8:1: 1.
An electronic control ionic membrane material prepared by a preparation method of the electronic control ionic membrane material for separating phosphate ions in water.
The principle is as follows: when the membrane electrode is applied with a proper positive potential, the composite membrane electrode is in an oxidation state, electrons are transmitted to the surface of rGO from an active material LDH and then transmitted to a power supply through a titanium mesh, at the moment, the electrons in the composite membrane electrode are in the oxidation state, the corresponding electroactive substances are activated, and bivalent nickel and iron ions are changed into trivalent (Ni and Fe ions)2+/Fe2+→Ni3+Fe3+) Conversely, when the negative potential is applied to the membrane electrode, the composite membrane electrode is in a reduction state, electrons are transmitted to a titanium net from a power supply and then are transmitted to the corresponding active substance through the surface of the reduced graphene oxide, the electrons in the composite membrane electrode are in the reduction state, and trivalent nickel and iron ions are changed into divalent (Ni) ions3+/Fe3+→Ni2++Fe2+) The LDH interlayer has excess anions and phosphate anions in the substrate will be released into the solution to balance the interlayer charge excess. Therefore, in the process of electrically controlling the ions, the reversible implantation and release of phosphate ions can be realized by changing the oxidation-reduction potential on the hybrid membrane.
Compared with the prior art, the invention has the following advantages:
(1) the invention mainly uses electrode potential oxidation-reduction as the main driving force, realizes the cyclic regeneration of the membrane material, and eliminates the secondary pollution caused by chemical regenerants to a certain extent;
(2) the adsorption and desorption efficiency of ions is greatly improved by taking electrode potential oxidation reduction as a driving force, and phosphate ions in the low-concentration raw material liquid containing the phosphate ions can be extracted;
(3) the electroactive ion exchange functional membrane material can be repeatedly utilized;
(4) target ion (PO) to be removed4 3–) The extraction rate is high, and energy-saving and efficient extraction of phosphate radical ion products is realized;
(5) the LDHs is applied to the ESIX process for the first time to realize the high-efficiency separation of inorganic anion pollutants, and the application range of the LDHs is expanded;
(6) removal of PO by systematically researching NiFe-LDH/rGO functional membrane material4 3-The ESIX performance and mechanism of (A) to (B) reveal4 3-Nature of high selectivity and high efficiency PO separation and recovery in ESIX process4 3-Objective law of (1). The LDHs is applied to the electric control ion exchange process, so that the high-efficiency separation of inorganic anion pollutants is realized, and the application range of the LDHs is expanded. It is composed ofSecondly, remove PO by systematically researching NiFe-LDH/rGO functional membrane material4 3-The ESIX performance and mechanism of (A) to (B) reveal4 3-Nature of high selectivity and high efficiency PO separation and recovery in ESIX process4 3-Objective law of (1). Realizing the selective separation of target ions (phosphate ions).
(7) After the adsorption and desorption experiment is carried out on the material in an electrochemical oxidation-reduction mode, the desorption efficiency is approximately maintained to be more than 85%, any acid or alkali substance is not required to be added in the desorption process, the generation of secondary pollution is avoided, the advantage that the chemical adsorption does not have is provided, the adsorption and desorption stability of the material is further enhanced, and the effective utilization rate of the material is further improved.
Drawings
FIG. 1 is a schematic diagram of the process of putting in and putting out a NiFe-LDH/rGO functional membrane material and an electrolyte solution containing phosphate ions in an electric control ion exchange device;
FIG. 2 is a schematic diagram of desorption regeneration of a NiFe-LDH/rGO functional membrane material with saturated adsorption.
In the figure: 1-raw material chamber (sodium phosphate electrolyte), 2-NiFe-LDH/rGO functional membrane material, 3-counter electrode, 4-reference electrode, 5-pulse power supply, 6-receiving chamber (low-concentration sodium nitrate electrolyte).
Detailed Description
Example 1
A preparation method of an electronic control ionic membrane material for separating phosphate ions in water comprises the following steps:
and 6, uniformly grinding the NiFe-LDH/rGO hybrid material prepared in the step 5, PVDF and conductive carbon black according to the volume ratio of 8:1:1, placing the mixture in an NMP solvent, stirring the mixture overnight, and coating the mixture on a conductive titanium mesh to obtain the electroactive nickel-iron double-metal hydroxide functional membrane material doped with reduced graphene oxide, namely an electronic control ion membrane material (NiFe-LDH/rGO functional membrane material). PVDF is used as a binder, NMP is used as a solvent, and a titanium mesh is used as a conductive substrate. The conductive matrix is reduced graphene oxide which just provides a channel for the transfer of electrons, and the NiFe-LDH is PO4 3-Provides a binding site.
The method of the invention is realized in an electric control ion membrane separation device, as shown in figure 1, a 1-raw material chamber is used for containing electrolyte liquid containing phosphate radical ions, when an oxidation potential is applied to a pulse power supply, an electroactive material on a membrane electrode generates oxidation reaction, and in order to keep the electric neutrality of the membrane, target ions (PO) are generated4 3–) Will be selectively adsorbed into the membrane material.
As shown in figure 2, after the adsorption is saturated, a reduction potential is applied to the pulse electrode, the electroactive material on the membrane electrode undergoes a reduction reaction, and phosphate ions (PO) are added to maintain the electrical neutrality of the membrane4 3–) The desorption is released into the corresponding solution in the 6-to-be-received chamber, thereby realizing the regeneration of the membrane material.
By the above mode, the potential applied on the pulse electrode is continuously switched, and the phosphate radical ion (PO) is realized4 3–) The cyclic recycling of the electrochemical reduction regeneration of the membrane material is realized.
In the specific implementation process, the counter potential electrode is an inert electrode formed by graphite paper, and the reference electrode is an electrode material formed by Ag/AgCl.
When the electric control ionic membrane material is used for efficiently removing phosphate ions in water, the application of an oxidation potential (0.8V) can obviously improve the PO pair of the NiFe-LDH/rGO functional membrane material4 3–The adsorption efficiency of the composite is that in 300ppm sodium phosphate solution, the functional type membrane material pair PO of NiFe-LDH/rGO in the electric control ion exchange process4 3–The saturated adsorption amount of (b) was 200 mg/g.
NiFe-LDH/rGO functional type membrane material pair PO4 3–Has high selectivity, PO4 3–/SO4 2-、PO4 3–/NO3 -And PO4 3–/Cl-The separation factors reached 3.16, 4.67 and 5.55, respectively. Meanwhile, the NiFe-LDH/rGO functional membrane material has good reproducibility and cycling stability, and the adsorption capacity can still reach more than 85% of the initial value after 10 cycles.
Comparative Table 1
| The material | Prior Art | |
| Adsorption concentration | Adsorption 200mg/g at 300ppm | Adsorption 200mg/g at 2000ppm |
| Regeneration efficiency | ≥85％ | ≥59.2％ |
| Number of cycles | 10 | 6 |
Compared with the prior art, the adsorption rate is improved while the cycle number is increased, which cannot be achieved by the prior art.
Those skilled in the art will appreciate that the invention may be practiced without these specific details. Although illustrative embodiments of the present invention have been described above to facilitate the understanding of the present invention by those skilled in the art, it should be understood that the present invention is not limited to the scope of the embodiments, and various changes may be made apparent to those skilled in the art as long as they are within the spirit and scope of the present invention as defined and defined by the appended claims, and all matters of the invention which utilize the inventive concepts are protected.
Claims (7)
1. A preparation method of an electronic control ionic membrane material for separating phosphate ions in water is characterized by comprising the following steps: the method comprises the following steps:
step 1, dissolving graphene oxide in deionized water, and performing ultrasonic treatment to obtain a graphene oxide solution;
step 2, preparing a nickel nitrate and ferric nitrate coexisting solution;
step 3, mixing the coexisting solution prepared in the step 2 with the graphene oxide solution prepared in the step 1, adding urea, and magnetically stirring to obtain a mixed solution;
step 4, placing the mixed solution obtained in the step 3 into a reaction kettle for reaction to obtain a NiFe-LDH/graphene oxide hybrid material;
step 5, placing the NiFe-LDH/graphene oxide hybrid material prepared in the step 4 in hydrazine steam for reduction to prepare a NiFe-LDH/rGO hybrid material;
and 6, mixing the NiFe-LDH/rGO hybrid material prepared in the step 5, PVDF and conductive carbon black, uniformly grinding, stirring in an NMP solvent, standing overnight, and coating on a conductive titanium mesh to obtain the electroactive nickel-iron double-metal hydroxide functional membrane material doped with reduced graphene oxide, namely the electronic control ionic membrane material.
2. The preparation method of the electric control ionic membrane material for separating phosphate ions in water according to claim 1, which is characterized in that: the concentration of the nickel nitrate in the coexisting solution in the step 2 is 0.07mol/L, and the concentration of the ferric nitrate is 0.03 mol/L.
3. The preparation method of the electric control ionic membrane material for separating phosphate ions in water according to claim 1, which is characterized in that: and (3) mixing the coexistence solution and the graphene oxide solution in the step 3 according to a ratio of 1: 1.
4. The preparation method of the electric control ionic membrane material for separating phosphate ions in water according to claim 1, which is characterized in that: the urea content in the mixed solution in the step 3 is excessive.
5. The preparation method of the electric control ionic membrane material for separating phosphate ions in water according to claim 1, which is characterized in that: the temperature of the reaction kettle in the step 4 is 95 ℃, and the reaction time is 24 hours.
6. The preparation method of the electric control ionic membrane material for separating phosphate ions in water according to claim 1, which is characterized in that: the NiFe-LDH/rGO hybrid material, PVDF and conductive carbon black are mixed according to the volume ratio of 8:1: 1.
7. The electronic control ionic membrane material prepared by the preparation method of the electronic control ionic membrane material for separating phosphate ions in water according to any one of claims 1 to 6.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104051729A (en) * | 2014-07-04 | 2014-09-17 | 电子科技大学 | Preparation method of NiFe2O4/graphene composite material for lithium battery cathode |
| CN105347340A (en) * | 2015-12-14 | 2016-02-24 | 太原理工大学 | Preparation method of graphene oxide |
| US20200075927A1 (en) * | 2018-09-04 | 2020-03-05 | Seoul National University R&Db Foundation | Method for manufacturing adsorption electrode and adsorption electrode manufactured using the same |
| CN111068726A (en) * | 2019-11-26 | 2020-04-28 | 浙江大学 | Preparation method of iron-doped nickel phosphide composite nitrogen-doped reduced graphene oxide electrocatalytic material |
| CN113578263A (en) * | 2021-07-26 | 2021-11-02 | 重庆工商大学 | Preparation method of adsorption material and wastewater dephosphorization process |
-
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- 2021-12-30 CN CN202111645043.1A patent/CN114229969A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104051729A (en) * | 2014-07-04 | 2014-09-17 | 电子科技大学 | Preparation method of NiFe2O4/graphene composite material for lithium battery cathode |
| CN105347340A (en) * | 2015-12-14 | 2016-02-24 | 太原理工大学 | Preparation method of graphene oxide |
| US20200075927A1 (en) * | 2018-09-04 | 2020-03-05 | Seoul National University R&Db Foundation | Method for manufacturing adsorption electrode and adsorption electrode manufactured using the same |
| CN111068726A (en) * | 2019-11-26 | 2020-04-28 | 浙江大学 | Preparation method of iron-doped nickel phosphide composite nitrogen-doped reduced graphene oxide electrocatalytic material |
| CN113578263A (en) * | 2021-07-26 | 2021-11-02 | 重庆工商大学 | Preparation method of adsorption material and wastewater dephosphorization process |
Non-Patent Citations (1)
| Title |
|---|
| 张光磊: "《气凝胶》", 30 October 2020, 中国铁道出版社有限公司, pages: 82 * |
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