CN117165791B - P/C electrode material, preparation method thereof and application thereof in rare earth recovery - Google Patents
P/C electrode material, preparation method thereof and application thereof in rare earth recovery Download PDFInfo
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- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 85
- 238000011084 recovery Methods 0.000 title claims abstract description 47
- 239000007772 electrode material Substances 0.000 title claims abstract description 43
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title abstract description 13
- -1 rare earth ions Chemical class 0.000 claims abstract description 52
- 229910052693 Europium Inorganic materials 0.000 claims abstract description 27
- 239000000243 solution Substances 0.000 claims abstract description 25
- IMQLKJBTEOYOSI-GPIVLXJGSA-N Inositol-hexakisphosphate Chemical compound OP(O)(=O)O[C@H]1[C@H](OP(O)(O)=O)[C@@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@@H]1OP(O)(O)=O IMQLKJBTEOYOSI-GPIVLXJGSA-N 0.000 claims abstract description 17
- 239000002243 precursor Substances 0.000 claims abstract description 15
- 239000011259 mixed solution Substances 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 10
- CTENFNNZBMHDDG-UHFFFAOYSA-N Dopamine hydrochloride Chemical compound Cl.NCCC1=CC=C(O)C(O)=C1 CTENFNNZBMHDDG-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229960001149 dopamine hydrochloride Drugs 0.000 claims abstract description 9
- WGYFACNYUJGZQO-UHFFFAOYSA-N aminomethanetriol Chemical compound NC(O)(O)O WGYFACNYUJGZQO-UHFFFAOYSA-N 0.000 claims abstract description 8
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- 238000003756 stirring Methods 0.000 claims abstract description 7
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- 238000010000 carbonizing Methods 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims abstract description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 39
- 229910052698 phosphorus Inorganic materials 0.000 claims description 38
- 239000011574 phosphorus Substances 0.000 claims description 38
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 28
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- IMQLKJBTEOYOSI-UHFFFAOYSA-N Phytic acid Natural products OP(O)(=O)OC1C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C1OP(O)(O)=O IMQLKJBTEOYOSI-UHFFFAOYSA-N 0.000 claims description 7
- 229940068041 phytic acid Drugs 0.000 claims description 7
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- 239000007864 aqueous solution Substances 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
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- 229920001690 polydopamine Polymers 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000004966 Carbon aerogel Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
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- RVPVRDXYQKGNMQ-UHFFFAOYSA-N lead(2+) Chemical compound [Pb+2] RVPVRDXYQKGNMQ-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention belongs to the technical field of electrode materials and rare earth recovery, and discloses a P/C electrode material, a preparation method thereof and application thereof in rare earth recovery. The preparation method comprises the following steps: dispersing the phytic acid solution in the trihydroxy aminomethane solution, and uniformly mixing by ultrasonic to obtain a mixed solution; dispersing dopamine hydrochloride into the mixed solution, stirring and reacting, and washing and drying the product to obtain a precursor; and carbonizing the precursor in inert atmosphere at 600-900 deg.c to obtain P/C electrode material. The selective recovery efficiency of the electrode material obtained by the invention to the rare earth ions such as Eu, dy, tb, lu can reach more than 96%, and the electrode material has wide application prospect in the rare earth recovery field.
Description
Technical Field
The invention belongs to the technical field of electrode materials and rare earth recovery, and particularly relates to a P/C electrode material, a preparation method thereof and application thereof in rare earth recovery.
Background
Rare earths belong to non-renewable resources. Rare earth elements have special light, heat, sound, electricity and magnetism, can greatly enhance the functions and structure of products, improve the technology of the scientific industry, and are widely applied to the fields of petrochemical industry, metallurgical industry, glass ceramic industry, crop industry and the like. However, with the exploitation of rare earth elements, the reserve of rare earth resources is kept and the guarantee period is continuously reduced, and the environmental problems caused by the continuous decline of the reserve and the guarantee period are increasingly prominent. The rare earth wastewater has low rare earth concentration and complex components, is difficult to recycle as raw materials for production, and the emission of the rare earth wastewater not only causes environmental pollution but also causes loss of rare earth precious resources. Therefore, the method for enriching, extracting and recycling the rare earth elements in the wastewater has important significance for sustainable healthy development and environmental protection of the rare earth industry.
In recent years, various methods for recovering rare earth ions in water have been developed, such as adsorption, chemical precipitation, ion exchange and membrane separation. However, these methods require a large number of pretreatment steps and chemical additives, and the adsorbents are very unstable in solution, making it difficult to efficiently and selectively recover rare earth ions. The capacitive deionization method is an environment-friendly, pollution-free and low-energy-consumption electrochemical water treatment method, and is attracting more and more attention from researchers in recent years. The electrochemical method is used for recovering metal ions in the solution, so that a more effective ion recovery mode is realized. In a conventional capacitive deionization process, an electric field is established by applying a certain voltage between two electrodes. The anions and cations in the solution move to two corresponding electrodes under the action of electric field force and are finally adsorbed on the surfaces of electrode materials, so that the concentration of ions in the solution is reduced. When ions moving to the surface of the electrode material reach saturation, the two electrodes are connected in opposite directions, ions on the surface of the electrodes are released again, so that ions in the solution are enriched again, and the electrodes are regenerated. The electrodes play a key role in capacitive deionization systems. The most commonly used electrodes are carbon-based electrodes, which capture charged ions mainly through coulombic force of an electric double layer interface, and the carbon-based electrodes have reached the bottleneck due to weak capacitance adsorption capacity and low selectivity, so that development of new electrode materials is a development requirement. As disclosed in patent CN 112981147A, a device and a method for recovering rare earth ions by capacitor deionization based on nitrogen-doped active carbon electrode material are disclosed, so that the rare earth solution performs deionization reaction on the capacitor with the nitrogen-doped active carbon electrode material to complete the adsorption of the rare earth ions. The nitrogen-doped active carbon electrode material is obtained by in-situ polymerization of pyrrole monomers and active carbon and calcination of a polymerization product generated by the in-situ polymerization. Patent CN 112661142A discloses a nanometer TiN/N-rGO three-dimensional porous carbon aerogel electrode material for synchronously removing organic matters and heavy metal ions in water body, which mainly verifies Cu 2+ And the capacitance removal effect of diesel, which is to Cu at 1.2V voltage 2+ The removal rate of (2) was 73.2%. Patent CN 111302445A discloses a capacitive deionization lead-removing GO/MoS 2 Electrode material, moS is improved by adding graphene 2 The surface area in contact with lead ions improves the lead ion removal effect. Patent CN 115465924A discloses a PPy/GO/MnO for capacitive deionization 2 Nanometer composite electrode material capable of realizing Cd in waste water 2+ 、Cu 2+ And Pb 2+ And (5) removing the metal ions by adsorption.
In recent years, organic and inorganic materials are subjected to phosphorylation modification by utilizing different phosphorus-containing ligands, and the method has well advanced in treating heavy metal pollution or rare earth element pollution in aqueous solutions. This is because the phosphorus-containing ligand has an ultra-strong binding capacity for rare earth elements, and can improve the recovery performance for rare earth ions. However, the metal ions are adsorbed by the adsorbent after phosphorylation modification, which is easy to cause secondary migration, and the adsorbent is difficult to regenerate, so that the application of the adsorbent is limited.
At present, no report of applying the phosphorus site interface electrode material P/C to capacitance adsorption to recycle rare earth ions is disclosed.
Disclosure of Invention
In view of the above drawbacks and shortcomings of the prior art, a primary object of the present invention is to provide a method for preparing a P/C electrode material.
Another object of the present invention is to provide a P/C electrode material prepared by the above method.
It is still another object of the present invention to provide the use of the above P/C electrode material in rare earth recovery.
The invention aims at realizing the following technical scheme:
a preparation method of a P/C electrode material comprises the following preparation steps:
(1) Dispersing the phytic acid solution in the trihydroxy aminomethane solution, and uniformly mixing by ultrasonic to obtain a mixed solution;
(2) Dispersing dopamine hydrochloride into the mixed solution in the step (1), stirring and reacting, and washing and drying a product to obtain a precursor;
(3) Carbonizing the precursor obtained in the step (2) in an inert atmosphere at 600-900 ℃ to obtain the P/C electrode material.
Further, the phytic acid solution in the step (1) is a phytic acid aqueous solution with the mass fraction of 0.5% -20%.
Further, the mass concentration of the trihydroxy aminomethane solution in the step (1) is 0.2-5 mg/mL.
Further, the addition amount of the dopamine hydrochloride in the step (2) is 5% -20% of the mass of the phytic acid contained in the phytic acid solution in the step (1). More preferably, the addition amount of the dopamine hydrochloride is 10% of the mass of the phytic acid.
Further, the stirring reaction in the step (2) means stirring reaction for 6-24 hours under normal temperature.
Further, in the step (2), washing means washing with deionized water, and drying means drying at a temperature of 100-140 ℃.
Further, the inert atmosphere in the step (3) refers to a nitrogen atmosphere or an argon atmosphere.
Further, the carbonization treatment in the step (3) is performed for 5 to 500 minutes.
The P/C electrode material is prepared by the method.
Preferably, the P/C electrode material is formed by irregular blocks, wherein the mass ratio of oxygen to phosphorus to carbon is 1-20:1-10:1-95.
The P/C electrode material is applied to rare earth recovery.
Further, the application method comprises the following steps: the P/C electrode material is used as the negative electrode of the capacitive deionization device, the active carbon material is used as the positive electrode, and then rare earth ions are recovered through capacitive adsorption.
Preferably, the voltage of the capacitive adsorption is 0.1-5V.
Preferably, the rare earth ions comprise at least one of Eu, dy, tb, lu rare earth ions.
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the invention, the phosphorus site interface material P/C containing the phosphorus active site is obtained through carbonization treatment of the composite precursor of the phytic acid molecule and the polydopamine, and the composite precursor has binding sites with affinity to rare earth ions, so that the selective adsorption effect of the electrode material on the rare earth ions can be remarkably improved. The selective recovery efficiency of the obtained P/C electrode material to the rare earth ions such as Eu, dy, tb, lu and the like under the voltage of 1.2V can reach more than 96 percent.
(2) Compared with the conventional adsorption method, chemical precipitation method, ion exchange method and membrane separation method, the application method in rare earth recovery has the advantages of high energy efficiency, environmental friendliness, low cost and the like, and has better cycle stability.
Drawings
FIG. 1 is a scanning electron microscope image of the phosphorus site interface material P/C prepared in example 1.
FIG. 2 is a transmission electron microscope image of the phosphor site interface material P/C prepared in example 1.
FIG. 3 is XPS and element content profiles of the phosphorus site interface material P/C prepared in example 1.
FIG. 4 is a graph showing the comparison of the recovery efficiency of rare earth ions from the phosphorus site interface material P/C prepared in example 1 and conventional activated carbon material (AC).
FIG. 5 is a graph showing the recovery efficiency of the phosphorus site interface material P/C prepared in example 1 on rare earth ions at different cycle times.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but embodiments of the present invention are not limited thereto.
Example 1
The preparation method of the phosphorus site interface material P/C comprises the following preparation steps:
(1) 100mL of phytic acid solution with the mass fraction of 10% is weighed and dispersed in 200mL of 1mg/mL of trihydroxy aminomethane solution, and the solution is evenly mixed by ultrasonic treatment for 10 minutes, so as to obtain a mixed solution.
(2) 1g of dopamine hydrochloride is weighed and dispersed into the mixed solution, the mixture is magnetically stirred at room temperature for reaction for 12 hours, the reacted product is washed and filtered by deionized water, and the precursor sample is obtained by drying at 120 ℃.
(3) And (3) placing the obtained precursor sample into a tubular furnace, and performing heating carbonization treatment under Ar inert atmosphere, wherein the temperature of the heating carbonization treatment is 750 ℃ and the time is 120min, so as to obtain the phosphorus site interface material (P/C) of the embodiment.
The scanning electron microscope and transmission electron microscope of the phosphorus site interface material P/C obtained in this example are shown in FIG. 1 and FIG. 2, respectively, and the elemental distribution diagram of the phosphorus site interface material P/C is shown in FIG. 3. The phosphorus site interface material P/C obtained by the invention is formed by irregular blocks, wherein the mass ratio of oxygen to phosphorus to carbon is 8:1:90.
The application of the phosphorus locus interface material P/C obtained in the embodiment in rare earth recovery is as follows:
the obtained P/C interface material of the phosphorus site is used as a negative electrode of a capacitance deionization device, active carbon is used as a positive electrode of the capacitance deionization device, and rare earth ions in rare earth solutions (containing Eu, dy, tb or Lu rare earth ions respectively) with different concentrations (10 ppm, 30ppm and 50 ppm) are capacitively adsorbed under the action of 1.2V voltage. The solution of the capacitance adsorption was subjected to ICP-OES test, the recovery rate of rare earth ions was calculated, and the conventional activated carbon material (AC) was used as a comparison to replace the phosphorus site interface material P/C of the present example, and the test results are shown in FIG. 4. As can be seen from the results of FIG. 4, the recovery efficiencies of the phosphorus site interface electrode material obtained in this example for Eu, dy, tb, lu rare earth ions having a solubility of 10ppm were 96.18%, 96.10%, 96.68% and 96.93%, for Eu, dy, tb, lu rare earth ions having a solubility of 30ppm were 94.75%, 94.97%, 95.72% and 95.69%, and for Eu, dy, tb, lu rare earth ions having a solubility of 50ppm were 93.69%, 93.06%, 94.02% and 93.25%, respectively. The recovery efficiency of the conventional activated carbon material (AC) to Eu, dy, tb, lu rare earth ions with the solubility of 10ppm is 67.19%, 66.96%, 69.68% and 67.93%, the recovery efficiency of Eu, dy, tb, lu rare earth ions with the solubility of 30ppm is 66.71%, 66.95%, 66.68% and 64.74%, and the recovery efficiency of Eu, dy, tb, lu rare earth ions with the solubility of 50ppm is 65.86%, 65.06%, 64.02% and 56.84%, respectively.
Meanwhile, the obtained phosphorus site interface material P/C is used as a negative electrode of a capacitance deionization device, active carbon is used as a positive electrode of the capacitance deionization device, and the capacitance adsorption concentration is 10ppm of rare earth ions in different rare earth solutions (respectively containing Eu, dy, tb or Lu rare earth ions) under the action of 1.2V voltage. The solution subjected to capacitive adsorption under different circulation times is subjected to ICP-OES test, and the recovery rate of rare earth ions is calculated, and the test result is shown in figure 5. As can be seen from the results of FIG. 5, the phosphorus site interface material P/C obtained in this example has a stable recovery efficiency for Eu, dy, tb, lu rare earth ions having a solubility of 10 ppm.
From the results, the phosphorus site interface material P/C containing the phosphorus active site obtained by carbonizing the composite precursor of the phytic acid molecule and the polydopamine can remarkably improve the recovery rate of rare earth ions and has good circulation stability compared with the conventional active carbon material.
Example 2
The preparation method of the phosphorus site interface material P/C comprises the following preparation steps:
(1) 50mL of phytic acid solution with the mass fraction of 10% is weighed and dispersed in 200mL of 1mg/mL of trihydroxy aminomethane solution, and the solution is evenly mixed by ultrasonic treatment for 10 minutes, so as to obtain a mixed solution.
(2) 1g of dopamine hydrochloride is weighed and dispersed into the mixed solution, the mixture is magnetically stirred at room temperature for reaction for 6 hours, the reacted product is washed and filtered by deionized water, and the precursor sample is obtained by drying at 100 ℃.
(3) And (3) placing the obtained precursor sample into a tube furnace, and performing heating carbonization treatment under Ar inert atmosphere, wherein the temperature of the heating carbonization treatment is 650 ℃, and the time is 240min, so as to obtain the phosphorus site interface material (P/C) of the embodiment.
The obtained P/C interface material of the phosphorus site is used as a negative electrode of a capacitance deionization device, active carbon is used as a positive electrode of the capacitance deionization device, and rare earth ions in rare earth solutions (containing Eu, dy, tb or Lu rare earth ions respectively) with different concentrations (10 ppm, 30ppm and 50 ppm) are capacitively adsorbed under the action of 1.2V voltage. The solution of the capacitance adsorption is subjected to ICP-OES test, the recovery rate of rare earth ions is calculated, and conventional activated carbon material (AC) is used for replacing phosphorus site interface material P/C in the embodiment for comparison, the recovery efficiencies of Eu, dy, tb, lu rare earth ions with the solubility of 10ppm, namely 93.12%, 93.32%, 94.26% and 93.21% respectively, and the recovery efficiencies of Eu, dy, tb, lu rare earth ions with the solubility of 30ppm, namely 92.53%, 92.32%, 91.84% and 92.32% respectively, and the recovery efficiencies of Eu, dy, tb, lu rare earth ions with the solubility of 50ppm, namely 90.33%, 90.73%, 90.74% and 93.25% respectively. The recovery efficiency of the conventional activated carbon material (AC) to Eu, dy, tb, lu rare earth ions with the solubility of 10ppm is 67.19%, 66.96%, 69.68% and 67.93%, the recovery efficiency of Eu, dy, tb, lu rare earth ions with the solubility of 30ppm is 66.71%, 66.95%, 66.68% and 64.74%, and the recovery efficiency of Eu, dy, tb, lu rare earth ions with the solubility of 50ppm is 65.86%, 65.06%, 64.02% and 56.84%, respectively.
From the results, the phosphorus site interface material P/C containing the phosphorus active site can obviously improve the recovery rate of rare earth ions compared with the conventional active carbon material.
Example 3
The preparation method of the phosphorus site interface material P/C comprises the following preparation steps:
(1) 200mL of phytic acid solution with the mass fraction of 10% is weighed and dispersed in 200mL of 1mg/mL of trihydroxy aminomethane solution, and the solution is evenly mixed by ultrasonic treatment for 10 minutes, so as to obtain a mixed solution.
(2) 1g of dopamine hydrochloride is weighed and dispersed into the mixed solution, the mixture is magnetically stirred at room temperature for reaction for 24 hours, the reacted product is washed and filtered by deionized water, and the precursor sample is obtained by drying at 140 ℃.
(3) And (3) placing the obtained precursor sample into a tube furnace, and performing heating carbonization treatment under Ar inert atmosphere, wherein the temperature of the heating carbonization treatment is 850 ℃ and the time is 90min, so as to obtain the phosphorus site interface material (P/C) of the embodiment.
The obtained P/C interface material of the phosphorus site is used as a negative electrode of a capacitance deionization device, active carbon is used as a positive electrode of the capacitance deionization device, and rare earth ions in rare earth solutions (containing Eu, dy, tb or Lu rare earth ions respectively) with different concentrations (10 ppm, 30ppm and 50 ppm) are capacitively adsorbed under the action of 1.2V voltage. The solution of the capacitance adsorption is subjected to ICP-OES test, rare earth ion recovery rate is calculated, and conventional activated carbon material (AC) is used for replacing phosphorus site interface material P/C in the embodiment for comparison, the recovery efficiency of the obtained phosphorus site interface electrode material in the embodiment for Eu, dy, tb, lu rare earth ions with the solubility of 10ppm is respectively 94.94%, 94.79%, 93.99% and 94.03%, the recovery efficiency of Eu, dy, tb, lu rare earth ions with the solubility of 30ppm is respectively 93.69%, 93.75%, 93.88% and 92.99%, and the recovery efficiency of Eu, dy, tb, lu rare earth ions with the solubility of 50ppm is respectively 92.58%, 92.94%, 92.52% and 91.93%. The recovery efficiency of the conventional activated carbon material (AC) to Eu, dy, tb, lu rare earth ions with the solubility of 10ppm is 67.19%, 66.96%, 69.68% and 67.93%, the recovery efficiency of Eu, dy, tb, lu rare earth ions with the solubility of 30ppm is 66.71%, 66.95%, 66.68% and 64.74%, and the recovery efficiency of Eu, dy, tb, lu rare earth ions with the solubility of 50ppm is 65.86%, 65.06%, 64.02% and 56.84%, respectively.
From the results, the phosphorus site interface material P/C containing the phosphorus active site can obviously improve the recovery rate of rare earth ions compared with the conventional active carbon material.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (7)
1. The application of the P/C electrode material in rare earth recovery is characterized in that the application method comprises the following steps: taking a P/C electrode material as a negative electrode of a capacitive deionization device, taking an active carbon material as a positive electrode, and then recovering rare earth ions through capacitive adsorption;
the voltage absorbed by the capacitor is 0.1-5V; the rare earth ions comprise at least one of Eu, dy, tb, lu rare earth ions;
the P/C electrode material is prepared by the following method:
(1) Dispersing the phytic acid solution in the trihydroxy aminomethane solution, and uniformly mixing by ultrasonic to obtain a mixed solution;
(2) Dispersing dopamine hydrochloride into the mixed solution in the step (1), stirring and reacting, and washing and drying a product to obtain a precursor;
(3) And (3) carbonizing the precursor obtained in the step (2) in an inert atmosphere at 600-900 ℃ to obtain the P/C electrode material.
2. The application of the P/C electrode material in rare earth recovery according to claim 1, wherein the phytic acid solution in the step (1) is a phytic acid aqueous solution with a mass fraction of 0.5% -20%.
3. The application of the P/C electrode material in rare earth recovery according to claim 1, wherein the mass concentration of the trihydroxy aminomethane solution in the step (1) is 0.2-5 mg/mL.
4. The application of the P/C electrode material in rare earth recovery according to claim 1, wherein the addition amount of the dopamine hydrochloride in the step (2) is 5% -20% of the mass of the phytic acid contained in the phytic acid solution in the step (1).
5. The application of the P/C electrode material in rare earth recovery according to claim 1, wherein the stirring reaction in the step (2) is stirring reaction for 6-24 hours under normal temperature; the washing is washing with deionized water, and the drying is drying at 100-140 ℃.
6. The use of a P/C electrode material according to claim 1 for rare earth recovery, wherein the inert atmosphere in step (3) is a nitrogen atmosphere or an argon atmosphere; the carbonization treatment time is 5-500 min.
7. The use of a P/C electrode material according to claim 1, wherein the P/C electrode material is formed of an irregular block shape, in which the mass ratio of oxygen, phosphorus to carbon is 1 to 20:1 to 10:1 to 95.
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| CN117165791B true CN117165791B (en) | 2024-04-05 |
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| CN108365230A (en) * | 2018-01-04 | 2018-08-03 | 中国科学院大学 | A kind of universality preparation method and application for the air electrode that active site is combined with electrode structure |
| CN112981147A (en) * | 2021-02-08 | 2021-06-18 | 中南大学 | Capacitive deionization rare earth recovery device and method based on nitrogen-doped activated carbon electrode material |
| CN113036101A (en) * | 2021-02-26 | 2021-06-25 | 中国科学院宁波材料技术与工程研究所 | Carbon-coated pyrophosphate and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108365230A (en) * | 2018-01-04 | 2018-08-03 | 中国科学院大学 | A kind of universality preparation method and application for the air electrode that active site is combined with electrode structure |
| CN112981147A (en) * | 2021-02-08 | 2021-06-18 | 中南大学 | Capacitive deionization rare earth recovery device and method based on nitrogen-doped activated carbon electrode material |
| CN113036101A (en) * | 2021-02-26 | 2021-06-25 | 中国科学院宁波材料技术与工程研究所 | Carbon-coated pyrophosphate and preparation method and application thereof |
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