CN114558617B - Application of Fe-PANI serving as heterogeneous Fenton catalyst - Google Patents
Application of Fe-PANI serving as heterogeneous Fenton catalyst Download PDFInfo
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- 229920000767 polyaniline Polymers 0.000 title claims abstract description 122
- 239000003054 catalyst Substances 0.000 title claims abstract description 65
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 63
- 238000005406 washing Methods 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000008367 deionised water Substances 0.000 claims abstract description 20
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 20
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims abstract description 16
- 239000012266 salt solution Substances 0.000 claims abstract description 16
- 230000003647 oxidation Effects 0.000 claims abstract description 13
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 13
- 239000003513 alkali Substances 0.000 claims abstract description 11
- 125000004429 atom Chemical group 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 8
- 239000011259 mixed solution Substances 0.000 claims abstract description 8
- 150000002505 iron Chemical class 0.000 claims abstract description 6
- 239000002253 acid Substances 0.000 claims abstract description 5
- 238000002360 preparation method Methods 0.000 claims abstract description 3
- 239000000243 solution Substances 0.000 claims description 22
- 239000012670 alkaline solution Substances 0.000 claims description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- 150000003839 salts Chemical class 0.000 claims description 5
- 150000002500 ions Chemical class 0.000 claims description 4
- 238000005470 impregnation Methods 0.000 claims description 3
- 238000003760 magnetic stirring Methods 0.000 claims description 3
- 238000010907 mechanical stirring Methods 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 2
- 238000013019 agitation Methods 0.000 claims 2
- 238000002604 ultrasonography Methods 0.000 claims 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims 1
- 230000007935 neutral effect Effects 0.000 description 9
- 238000003756 stirring Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 230000003197 catalytic effect Effects 0.000 description 6
- 238000001000 micrograph Methods 0.000 description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 3
- 230000004075 alteration Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- TUJKJAMUKRIRHC-UHFFFAOYSA-N hydroxyl Chemical compound [OH] TUJKJAMUKRIRHC-UHFFFAOYSA-N 0.000 description 3
- 238000011068 loading method Methods 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 238000007259 addition reaction Methods 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 229910001448 ferrous ion Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- LGZQSRCLLIPAEE-UHFFFAOYSA-M sodium 1-[(4-sulfonaphthalen-1-yl)diazenyl]naphthalen-2-olate Chemical compound [Na+].C1=CC=C2C(N=NC3=C4C=CC=CC4=CC=C3O)=CC=C(S([O-])(=O)=O)C2=C1 LGZQSRCLLIPAEE-UHFFFAOYSA-M 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/06—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing polymers
- B01J31/069—Hybrid organic-inorganic polymers, e.g. silica derivatized with organic groups
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- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/16—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
- B01J31/18—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes containing nitrogen, phosphorus, arsenic or antimony as complexing atoms, e.g. in pyridine ligands, or in resonance therewith, e.g. in isocyanide ligands C=N-R or as complexed central atoms
- B01J31/1805—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes containing nitrogen, phosphorus, arsenic or antimony as complexing atoms, e.g. in pyridine ligands, or in resonance therewith, e.g. in isocyanide ligands C=N-R or as complexed central atoms the ligands containing nitrogen
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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Abstract
The invention discloses an application of Fe single-atom catalyst Fe-PANI as heterogeneous Fenton catalyst, the catalyst preparation method comprises the following steps: 1) Pretreatment of polyaniline carrier; polyaniline in a complete oxidation state or an intermediate oxidation state is directly used as a carrier; the polyaniline in the acid doped state is used as a carrier after alkali washing; 2) Impregnating a polyaniline carrier in an iron salt solution or a ferrous salt solution or a mixed solution of iron salt and ferrous salt, so that Fe atoms are coordinated with imine nitrogen atoms in polyaniline to be loaded on the surface of polyaniline; 3) And (3) separating the polyaniline carrier loaded with the Fe atoms, washing the polyaniline carrier with deionized water, and drying to obtain the Fe monoatomic catalyst Fe-PANI. The invention also relates to the Fe monoatomic catalyst Fe-PANI prepared by the method, wherein the Fe monoatomic catalyst Fe-PANI takes polyaniline as a carrier, and Fe monoatoms are stably and highly dispersed and loaded on the surface of the polyaniline carrier through coordination.
Description
Technical Field
The invention relates to a catalyst and a water treatment technology, in particular to an application of Fe monoatomic catalyst Fe-PANI as a heterogeneous Fenton catalyst.
Background
Homogeneous Fenton oxidation technology is often used in the treatment of organic wastewater that is difficult to biodegrade or difficult to treat by general chemical oxidation technology, the mechanism of which is ferrous ions (Fe 2+ ) Catalytic hydrogen peroxide decomposition generates hydroxyl radicals (oxidation potential up to 2.80V, next to fluorine) with strong oxidizing properties. The hydroxyl radical has very high electronegativity or electrophilicity, and the electron affinity of the hydroxyl radical is as high as 569.3 kJ, so that the hydroxyl radical has very strong addition reaction characteristic, and can effectively degrade organic pollutants in water. However, the homogeneous Fenton reaction has the defects of narrow pH application range (about 3), difficult recovery of the catalyst, iron-containing sludge generation and the like.
The Fe-based heterogeneous Fenton catalyst is prepared by loading active Fe on the surface of a carrier material, so that the problems of generation of iron-containing sludge and recovery and utilization of the catalyst can be effectively solved. However, the activity of heterogeneous Fenton catalysts is susceptible to the number of active sites exposed and the circulation rate between Fe (III)/Fe (II), resulting in a decrease in activity under neutral conditions. The supported monoatomic catalyst can expose Fe active sites to the greatest extent by highly dispersing Fe atoms on the surface of a carrier, thereby improving the reactivity.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide an application of Fe single-atom catalyst Fe-PANI as heterogeneous Fenton catalyst to solve the problems of narrow application range of homogeneous Fenton pH and catalyst Fe 2+ And cannot be recycled.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
an application of Fe monoatomic catalyst Fe-PANI as heterogeneous Fenton catalyst, comprising the following steps:
1) Pretreatment of polyaniline carrier; polyaniline in a complete oxidation state or an intermediate oxidation state is directly used as a carrier; the polyaniline in the acid doped state is used as a carrier after alkali washing;
2) Impregnating a polyaniline carrier in an iron salt solution or a ferrous salt solution or a mixed solution of iron salt and ferrous salt, so that Fe atoms are coordinated with imine nitrogen atoms in polyaniline to be loaded on the surface of polyaniline;
3) And (3) separating the polyaniline carrier loaded with the Fe atoms, washing the polyaniline carrier with deionized water, and drying to obtain the Fe monoatomic catalyst Fe-PANI.
Further, the specific operation of alkali washing the polyaniline in the acid doped state in the step 1) is as follows: the polyaniline is uniformly dispersed and soaked in alkali solution, and then the polyaniline is separated out and washed by deionized water until the pH value of the washing solution is 6-9.
Further, the step 2) Fe in the ferric salt solution or ferrous salt solution or the mixed solution of ferric salt and ferrous salt 3+ With Fe 2+ The total ion concentration was 1.0X10 -6 -1.0×10 1 mol·L -1 。
Further, each 1 g polyaniline carrier in the step 2) is immersed in 1-1000 mL of ferric salt solution or ferrous salt solution or mixed solution of ferric salt and ferrous salt.
Further, the impregnation in the step 2) is performed under ultrasonic, mechanical stirring, magnetic stirring or vibration, and the impregnation time is 0.01-72 h.
Further, in the step 3), when the polyaniline carrier loaded with Fe atoms is washed, the polyaniline carrier should be washed until no Fe exists in the washing liquid 3+ Or Fe (Fe) 2+ Ions are present.
Further, the alkali solution is a strong alkali solution or a weak alkali solution, the soaking is carried out under ultrasonic, mechanical stirring, magnetic stirring or vibration, and the soaking time is 0.01-72 h.
Further, the alkali solution has a concentration of 1.0X10 -6 -1.0×10 1 mol·L -1 。
Further, the strong alkaline solution is NaOH solution or KOH solution, and the weak alkaline solution is ammonia water.
The invention also provides the Fe-PANI of the Fe monoatomic catalyst prepared by the method, wherein the Fe-PANI of the Fe monoatomic catalyst takes polyaniline as a carrier, and the Fe monoatoms are stably and highly dispersed and loaded on the surface of the polyaniline carrier through coordination.
Compared with the prior art, the invention has the following technical effects:
the invention uses polyaniline as a carrier, and realizes stable loading of Fe monoatoms by utilizing the coordination effect of imine nitrogen atoms and Fe in polyaniline. Firstly, the polyaniline in a complete oxidation state or an intermediate oxidation state is directly used as a carrier, or the polyaniline in an acid doped state is used as a carrier after alkali washing. Then, the carrier is immersed in ferric salt solution or ferrous salt solution or mixed solution of ferric salt and ferrous salt, and Fe monoatomic catalyst Fe-PANI can be prepared. The whole process is carried out spontaneously in the aqueous solution, is simple and efficient, and does not need to provide additional energy or carry out other reaction processes. The solution after the reaction is an aqueous solution, has little harm to the environment, is very easy to treat or is recycled for the second time, so the whole preparation process is an environment-friendly chemical synthesis process.
The invention stably loads Fe atoms on the surface of the PANI carrier, realizes high loading of single-atom Fe, does not cause change of the structure and the property of the PANI, and realizes the organic combination of Fe and PANI. The prepared Fe-PANI catalyst not only has the capability of decomposing hydrogen peroxide to generate OH, but also can effectively improve the electron transmission efficiency and the reduction rate of Fe (III) in the catalytic process by the conductivity of the polyaniline carrier and the reducing group (mainly amino group) thereof, thereby improving the catalytic activity. The Fe-PANI catalyst prepared by the method can show high heterogeneous Fenton catalytic activity and stability within the pH range of 3-8. In addition, the catalyst has strong response characteristic to visible light, so that the catalyst can generate photo-generated electrons under the illumination condition to promote the reduction of Fe (III), and therefore, the catalyst has more excellent heterogeneous Fenton catalytic activity and stability under the illumination condition. The method is simple to operate, and the prepared catalyst has good catalytic activity and high performance of treating refractory organic wastewater, is a heterogeneous Fenton catalyst with high activity, and has good application prospect.
Drawings
FIG. 1 is a high resolution transmission electron microscope image of Fe monoatomic catalyst Fe-PANI prepared in example 1 of the present invention;
FIG. 2 is a spherical aberration correcting transmission electron microscope image of Fe monoatomic catalyst Fe-PANI prepared in example 1 of the present invention.
Detailed Description
The following examples illustrate the invention in further detail.
Example 1
Into a beaker were added 0.2g of acid-doped polyaniline and 20mL of 0.2 mol L, respectively -1 After the polyaniline is dedoped by ultrasonic oscillation of 0.5. 0.5 h, the polyaniline is separated and washed by deionized water until the washing solution is neutral, and then the polyaniline carrier is transferred to 20mL of 0.12 mol.L -1 Magnetically stirring at room temperature for 2 h, separating polyaniline carrier, washing with deionized water, draining, and drying in oven at 60deg.C to obtain Fe-PANI catalyst.
Fig. 1 and 2 are a high resolution transmission electron microscope image and a spherical aberration correction transmission electron microscope image of Fe monoatomic catalyst Fe-PANI prepared in this example, respectively. As can be seen from FIG. 1, fe atoms are uniformly distributed on the surface of the polyaniline carrier, and no agglomeration phenomenon occurs. And the spherical aberration correction transmission electron microscope image in fig. 2 can obviously observe uniformly distributed iron atoms (white bright spots are iron atoms) on the surface of the polyaniline carrier, and the prepared Fe-PANI is proved to be a monoatomic catalyst.
In order to verify the treatment effect of the Fe-PANI catalyst prepared by the method on the organic wastewater difficult to degrade, the Fe-PANI catalyst prepared by the embodiment is used as a catalyst, the prepared acid red G dye wastewater is used as a treatment object, heterogeneous Fenton degradation researches are respectively carried out under the conditions of pH=3 and 6, the dye solution is changed from red to colorless after degradation, no precipitation is generated after the pH value is adjusted to be neutral, and the catalyst prepared by the method has good activity under the neutral condition and can effectively avoid the generation of iron-containing sludge.
Example 2
Into a beaker were added 0.2g of acid-doped polyaniline and 20mL of 0.02 mol L, respectively -1 After shaking ultrasonically 0.5. 0.5 h, the polyaniline is separated and washed with deionized water until the washing solution is neutral, and then the polyaniline carrier is transferred to 20mL of 0.12 mol.L -1 Magnetically stirring at room temperature for 2 h, separating polyaniline carrier, washing with deionized water, draining, and drying in oven at 60deg.C to obtain Fe-PANI catalyst.
Example 3
Into a beaker were added 0.2g of acid-doped polyaniline and 20mL of 0.2 mol L, respectively -1 After shaking ultrasonically 0.5. 0.5 h, the polyaniline is separated and washed with deionized water until the washing solution is neutral, and then the polyaniline carrier is transferred to 20mL of 1.0 mol.L -1 Magnetically stirring at room temperature for 2 h, separating polyaniline carrier, washing with deionized water, draining, and drying in oven at 60deg.C to obtain Fe-PANI catalyst.
Example 4
Into a beaker were added 0.2g of acid-doped polyaniline and 10mL of 1.0X10, respectively 1 molL -1 After magnetically stirring 72 and h, the mixture is separatedThe polyaniline was isolated and washed with deionized water until the wash solution was neutral, and then the polyaniline carrier was transferred to 200 mL of 1.0x10 -6 mol·L -1 After magnetically stirring 72 h at room temperature, the polyaniline carrier was separated and washed thoroughly with deionized water, and dried in an oven at 50 ℃ after draining to obtain the Fe-PANI catalyst.
Example 5
Into a beaker were added 0.2g of acid-doped polyaniline and 50mL of 1.0X10, respectively -6 molL -1 After shaking ultrasonically 0.01. 0.01 h, the polyaniline is separated and washed with deionized water until the washing solution is neutral, and then the polyaniline carrier is transferred to 0.2 mL1.0×10 1 mol·L -1 Magnetically stirring at room temperature for 0.01. 0.01 h, separating polyaniline carrier, washing with deionized water, draining, and drying in oven at 60deg.C to obtain Fe-PANI catalyst.
Example 6
Into a beaker were added 0.2g of acid-doped polyaniline and 10mL of 1.0X10, respectively -3 molL -1 After ultrasonic shaking of 10 h, the polyaniline is separated and washed with deionized water until the washing solution is neutral, and then the polyaniline carrier is transferred to 10mL of 2.0 mol.L -1 After magnetically stirring 10 h at room temperature, the polyaniline carrier is separated and washed thoroughly with deionized water, and dried in an oven at 70 ℃ after draining to obtain the Fe-PANI catalyst.
Example 7
Into a beaker were added 0.2g of polyaniline in a completely oxidized state and 50ml of 1.0X10, respectively -2 mol·L -1 After magnetically stirring 20 h at room temperature, the polyaniline carrier is separated and washed thoroughly with deionized water, and after draining, the solution is dried in an oven at 65 ℃ to obtain the Fe-PANI catalyst.
Example 8
Into a beaker were added 0.2g of the intermediate oxidation state polyaniline and 2 ml of 1.0X10, respectively -3 mol·L -1 Is magnetically stirred at room temperature for 50 h, after which the polyaniline carrier is separated and deionized water is usedWashing thoroughly, draining off water, and drying in a 55 ℃ oven to obtain the Fe-PANI catalyst.
Example 9
Adding 0.2g of intermediate oxidation state polyaniline, 60 ml of 0.1 mol.L into a beaker -1 And 60 mL of 0.1 mol.L -1 After which the polyaniline carrier is separated and washed thoroughly with deionized water, and dried in an oven at 60 ℃ after draining to obtain the Fe-PANI catalyst.
Claims (7)
1. An application of Fe monoatomic catalyst Fe-PANI as heterogeneous Fenton catalyst, which is characterized in that: the Fe monoatomic catalyst Fe-PANI takes polyaniline as a carrier, and Fe monoatoms are stably and highly dispersed and loaded on the surface of the polyaniline carrier through coordination;
the preparation method of the Fe monoatomic catalyst Fe-PANI comprises the following steps:
1) Pretreatment of polyaniline carrier; polyaniline in a complete oxidation state or an intermediate oxidation state is directly used as a carrier; the polyaniline in the acid doped state is used as a carrier after alkali washing;
2) Impregnating a polyaniline carrier in an iron salt solution or a ferrous salt solution or a mixed solution of iron salt and ferrous salt, so that Fe atoms are coordinated with imine nitrogen atoms in polyaniline to be loaded on the surface of polyaniline; fe in ferric salt solution or ferrous salt solution or mixed solution of ferric salt and ferrous salt 3+ With Fe 2+ The total ion concentration was 1.0X10 -6 -1.0×10 1 mol·L -1 The method comprises the steps of carrying out a first treatment on the surface of the Every 1-1000 mL of ferric salt solution or ferrous salt solution or mixed solution of ferric salt and ferrous salt is immersed in the polyaniline carrier of g;
3) And (3) separating the polyaniline carrier loaded with the Fe atoms, washing the polyaniline carrier with deionized water, and drying to obtain the Fe monoatomic catalyst Fe-PANI.
2. The use of Fe monoatomic catalyst Fe-PANI as heterogeneous Fenton catalyst according to claim 1, wherein the specific operation of alkaline washing of the polyaniline in acid-doped form in step 1) is: the polyaniline is uniformly dispersed and soaked in alkali solution, and then the polyaniline is separated out and washed by deionized water until the pH value of the washing solution is 6-9.
3. The use of Fe monoatomic catalyst Fe-PANI as claimed in claim 1 as heterogeneous fenton catalyst, wherein the impregnation in step 2) is performed under ultrasound, mechanical agitation, magnetic agitation or shaking for a period of time ranging from 0.01 to 72 h.
4. The use of Fe-PANI as heterogeneous Fenton catalyst according to claim 1, wherein the step 3) of washing the polyaniline carrier loaded with Fe atoms is performed until no Fe is present in the washing solution 3+ Or Fe (Fe) 2+ Ions are present.
5. The use of Fe monoatomic catalyst Fe-PANI as a heterogeneous fenton catalyst according to claim 2, wherein the alkaline solution is a strong alkaline solution or a weak alkaline solution, and the soaking is performed under ultrasound, mechanical stirring, magnetic stirring or shaking for a period of time of 0.01-72 h.
6. The use of Fe monoatomic Fe-PANI catalyst according to claim 5 as heterogeneous Fenton catalyst, wherein the alkaline solution has a concentration of 1.0X10 -6 -1.0×10 1 mol·L -1 。
7. The use of Fe monoatomic catalyst Fe-PANI as claimed in claim 5 as a heterogeneous Fenton catalyst, wherein the strongly alkaline solution is NaOH solution or KOH solution and the weakly alkaline solution is aqueous ammonia.
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| CN202210207243.7A CN114558617B (en) | 2022-03-03 | 2022-03-03 | Application of Fe-PANI serving as heterogeneous Fenton catalyst |
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