CN113908816A - Preparation method and application of carbon-based polypyrrole composite material - Google Patents

Preparation method and application of carbon-based polypyrrole composite material Download PDF

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CN113908816A
CN113908816A CN202111366106.XA CN202111366106A CN113908816A CN 113908816 A CN113908816 A CN 113908816A CN 202111366106 A CN202111366106 A CN 202111366106A CN 113908816 A CN113908816 A CN 113908816A
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carbon
composite material
polypyrrole
polypyrrole composite
ferroferric oxide
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孙红文
喻豪
张鹏
陈浩
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Nankai University
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    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/26—Synthetic macromolecular compounds
    • B01J20/262—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon to carbon unsaturated bonds, e.g. obtained by polycondensation
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
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    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
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    • 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
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/3085—Chemical treatments not covered by groups B01J20/3007 - B01J20/3078
    • 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
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
    • 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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Abstract

The invention discloses a preparation method and application of a carbon-based polypyrrole composite material, wherein the preparation method indirectly generates Fe3+Pyrrole monomer as oxidant, ferroferric oxide as reaction inducing point, and slow generation of Fe by corrosion of ferroferric oxide3+The polypyrrole granules used as the oxidant polymerize the pyrrole, and because the polymerization rate of the pyrrole monomer is slowed down, the prepared polypyrrole granules have larger diameters which can reach several micrometers, exist independently from each other, have better dispersibility, overcome the defect of polypyrrole agglomeration, and can expose more favorable adsorption sites. In addition prepared by the present inventionThe polypyrrole is in a micron level, so that the polypyrrole is stable and is not easy to run off, and the potential safety risk of nano toxicity generated by the nano particles can be reduced. The carbon-based polypyrrole composite material prepared by the method has high adsorption capacity on anionic PFOA and PFOS in the environment, can realize high-efficiency removal of PFOA and PFOS in water, and has great industrial prospect.

Description

Preparation method and application of carbon-based polypyrrole composite material
Technical Field
The invention belongs to the technical field of environment new functional materials, and particularly relates to a preparation method and application of a carbon-based polypyrrole composite material.
Background
Perfluoro compounds (PFASs) are a new type of artificially synthesized compounds in which all hydrogen atoms on a carbon skeleton are replaced by fluorine atoms, have high detection frequency in various environmental media and consumer products, and are widely concerned all over the world. Because of strong environmental persistence, biological enrichment, endocrine interference, growth, development and reproductive toxicity, two compounds with high frequency, namely perfluorooctanesulfonic acid (PFOS), perfluorooctanoic acid (PFOA) and salts thereof, are listed as persistent organic pollutants under global control of Stockholm convention in 2009 and 2019 respectively. Aiming at the problem of PFASs pollution in water, the development of an effective PFASs removal technology is very important. Because of the stable characteristics of pfas, traditional chemical oxidation and biological treatment processes are difficult to remove pfas in water and are easy to generate secondary pollution, so how to remove pfas in water efficiently and rapidly is the main objective of current research.
Since PFOS and PFOA have low pKa values and are usually present as anionic compounds in water, it is a common and effective method to prepare an adsorbent having a positive charge on the surface to enhance the adsorption of PFOS and PFOA by electrostatic attraction. The polypyrrole is generated by oxidative polymerization of a pyrrole monomer, has the characteristics of no toxicity, direct polymerization, environmental friendliness, low price and the like, and in addition, part of nitrogen atoms in the polypyrrole have positive charges, so that the polypyrrole belongs to a cationic polymer and is beneficial to adsorption of an anionic compound. The traditional method generally adopts direct addition of oxidant to directly polymerize pyrrole monomers to prepare pure polypyrrole. But polypyrrole granules can cause serious agglomeration due to pi-pi accumulation, the dispersibility of polypyrrole on a substrate is poor, fewer adsorption sites are exposed, and the adsorption capacity of the polypyrrole as an adsorbent is poor. In view of the above problems, it is one of the common approaches to prepare a composite material by using a carbonaceous material, such as biochar, graphene, activated carbon, etc., as a substrate and loading polypyrrole on the substrate. However, in these methods, the substrate material is mixed with the pyrrole monomer, and then the oxidant is added into the mixed solution to chemically polymerize the pyrrole in situ on the substrate, because the oxidant is added at one time, the pyrrole monomer will rapidly polymerize, so the formed polypyrrole pellets have a small diameter, mostly hundreds of nanometers, are closely adjacent to each other, the dispersibility of the polypyrrole pellets is poor, and even the polypyrrole pellets are agglomerated and stacked on the substrate, which will cause the composite material to expose fewer adsorption sites, and the adsorption performance is greatly reduced. In addition, polypyrrole is easy to run off and unstable, so that potential safety risk problems can be caused.
Therefore, a new preparation method is found, the composite material with better polypyrrole sphere dispersibility is prepared, the adsorption performance of the composite material is improved, the composite material exists more stably in the environment, and the method has important value and significance in the aspects of preparation of environment functional materials and wastewater treatment.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a preparation method of a carbon-based polypyrrole composite material, which takes ferroferric oxide as a reaction induction point and slowly generates Fe by corroding the ferroferric oxide3+The polypyrrole granules used as the oxidant polymerize the pyrrole, and because the polymerization rate of pyrrole monomers is slowed down, the prepared polypyrrole granules have larger diameters which can reach several micrometers, exist independently, have better dispersibility, overcome the defect of polypyrrole agglomeration, and can expose more favorable adsorption sites.
The invention also aims to provide application of the carbon-based polypyrrole composite material prepared by the invention, and the carbon-based polypyrrole composite material has higher adsorption capacity to anionic PFOA and PFOS in the environment, so that PFOA and PFOS in water can be efficiently removed.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of a carbon-based polypyrrole composite material comprises the following steps:
preparation of S1 ferroferric oxide/carbon-based material
Loading ferroferric oxide on a carbon-based material by adopting a coprecipitation method to prepare the ferroferric oxide/carbon-based material;
preparation of S2 carbon-based polypyrrole composite material
Dispersing the ferroferric oxide/carbon-based material in ultrapure water, and carrying out ultrasonic treatment for 10-30 min. Then adding pyrrole monomer into the mixture, and continuing to perform ultrasonic treatment for 10-30 min. After the reaction is finished, dropwise adding hydrochloric acid into the mixture, performing ultrasonic treatment for 60-240min, filtering to obtain a product, sequentially washing the product with water and methanol for several times, and then placing the product in a vacuum drying oven for vacuum drying at the temperature of 60-80 ℃ for 10-20h to prepare the carbon-based polypyrrole composite material.
Further, in the step S1, biochar is selected as the carbon-based material, and the carbon-based material is dispersed in Fe2+Salt and Fe3+In the mixed solution of salt, adjusting the pH of the mixed solution to 10 by using NaOH solution, oscillating for 1-3h at room temperature, filtering the product, and then drying in a vacuum drying oven at 60-80 ℃ for 20-40h in vacuum to obtain the ferroferric oxide/carbon-based material, wherein the Fe is2+And Fe3+In a molar ratio range of 1: 2.
Further, the carbon-based material in step S1 includes, but is not limited to, one or more of biochar, activated carbon, graphene, and graphene oxide.
Further, the preparation method of the iron oxide/carbon-based material in step S1 is not limited to the coprecipitation method, and may further include one or more of a dipping-calcining method, a hydrothermal synthesis method, and a chemical reduction method.
Further, the ratio of the mass (g) of the ferroferric oxide/carbon-based material to the ultrapure water (mL) in the step S2 ranges from 1:150 to 1: 500.
Further, in the step S2, a ratio of the mass (g) of the ferroferric oxide/carbon-based material to the volume (mL) of the pyrrole monomer is in a range from 3:1 to 1: 50.
Further, the ratio of the volume (mL) of the pyrrole monomer to the volume (mL) of the hydrochloric acid in the step S2 ranges from 1:3 to 1: 150.
Further, the hydrochloric acid used in step S2 is concentrated hydrochloric acid, and dilute hydrochloric acid cannot be used.
Further, the number of water and methanol washes in step S2 is at least 3 each.
Further, the present invention provides a method for removing PFASs from water, the method comprising the steps of: the carbon-based polypyrrole composite material prepared by the invention is added into water body polluted by PFOA or PFOS.
Further, the removing method comprises the following specific steps: adding 20mg of the carbon-based polypyrrole composite material prepared by the invention into 50mL of PFOA or PFOS polluted water containing 200mg/L, placing the mixture in a constant temperature oscillator, and oscillating for 40h under the condition of 180 r/min at room temperature. After the reaction is finished, measuring the content of PFOS or PFOA in the solution, and calculating the removal rate.
Furthermore, the adding amount of the carbon-based polypyrrole composite material in the removing method is 0.2-0.5 g/L. Compared with the prior art, the invention has the beneficial effects that:
(1) the method utilizes ferroferric oxide/carbon-based material to indirectly generate Fe under the action of hydrochloric acid3+By slowing down Fe3 +The release rate of the oxidant is close to slow down the polymerization of pyrrole, the control is timely, the operation is simple, and the method is economic and environment-friendly; (2) compared with the prior art, the method directly adds Fe3+The carbon-based polypyrrole composite material prepared by the method has the advantages that the polypyrrole microspheres have larger diameters which can reach several micrometers, are independent from one another and are dispersed on the carbon-based material, so that the defect of polypyrrole agglomeration is overcome, more favorable adsorption sites can be exposed, and the adsorption performance is greatly improved;
(3) the carbon-based polypyrrole composite material prepared by the invention is relatively pure polypyrrole and is in a micron level, has good dispersibility in water, is relatively stable and not easy to run off, and can reduce the potential safety risk of nano toxicity generated by nanoparticles.
Drawings
Fig. 1 shows a carbon-based material of the present invention and a carbon-based polypyrrole composite material prepared in example 1;
FIG. 2 shows stability testing of carbon-based polypyrrole composites prepared in example 1 of the present invention;
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Example 1:
the invention relates to a preparation method of a carbon-based polypyrrole composite material, which is implemented according to the following steps:
and S1, selecting biochar as the carbon-based material. 20g of the carbon-based Material was dispersed in 600mL of FeCl2(41.7mM) and FeCl3(83.4mM) in the mixed solution, adjusting the pH of the mixed solution to 10 with a 5M NaOH solution, shaking at room temperature for 1h, filtering the product, and performing vacuum drying in a vacuum drying oven at 60 ℃ for 24h to obtain the ferroferric oxide/carbon-based material.
S2, dispersing 0.3g of the ferroferric oxide/carbon-based material prepared in the step S1 in 70mL of ultrapure water, and performing ultrasonic dispersion for 10 min. Then 3mL of pyrrole monomer was added thereto and sonication was continued for 30 min. After the reaction is finished, dropwise adding 12mL of concentrated hydrochloric acid, performing ultrasonic treatment for 120min, filtering to obtain a product, washing with water and methanol for 3 times respectively, and performing vacuum drying in a vacuum drying oven at 60 ℃ for 10h to obtain the carbon-based polypyrrole composite material A.
Referring to fig. 1, fig. 1(a-b) are Scanning Electron Microscope (SEM) images of selected carbon-based biochar material for preparing carbon-based polypyrrole composite material according to the present invention, and it can be seen from the images that the carbon-based biochar material has more developed pores, and most of the pores are straight pores, and in addition, the surface has more wrinkles, which can provide good attachment sites for polypyrrole loading, and is beneficial to loading and dispersing polypyrrole. Fig. 1(c-d) are SEM images of the carbon-based polypyrrole composite material prepared in example 1, respectively, and compared with fig. 1(a-b), fig. 1(c-d) have a plurality of spherical particles, which are polypyrrole, indicating that polypyrrole is successfully loaded on biochar, and the loaded polypyrrole is a microsphere with a diameter of several micrometers, and the polypyrrole microspheres are relatively independent from each other and have relatively good dispersibility, which proves that the carbon-based polypyrrole composite material prepared by the method of the present invention overcomes the disadvantage of polypyrrole agglomeration.
Example 2:
the invention relates to a preparation method of a carbon-based polypyrrole composite material, which is implemented according to the following steps:
and S1, selecting activated carbon as the carbon-based material. Dispersing 30g of carbon-based material in 1200mL of FeCl2(83.4mM) and FeCl3(166.8mM) adjusting the pH of the mixed solution to 10 by using a 5M NaOH solution, shaking at room temperature for 2h, filtering the product, and drying in a vacuum drying oven at 75 ℃ for 30h in vacuum to obtain the ferroferric oxide/carbon-based material.
S2, dispersing 0.5g of the ferroferric oxide/carbon-based material prepared in the step S1 in 120mL of ultrapure water, and performing ultrasonic dispersion for 20 min. 5mL of pyrrole monomer was then added thereto and sonication continued for 30 min. After the reaction is finished, 15mL of concentrated hydrochloric acid is dropwise added into the reaction product, ultrasonic treatment is carried out for 180min, the product is obtained by filtration, the product is washed by water and methanol for 3 times respectively, and then vacuum drying is carried out for 15h in a vacuum drying oven at 60 ℃, so as to obtain the carbon-based polypyrrole composite material B.
Example 3:
the invention relates to a preparation method of a carbon-based polypyrrole composite material, which is implemented according to the following steps:
and S1, selecting graphene as a carbon-based material. 40g of the carbon-based Material was dispersed in 2000mL of FeCl2(125.1mM) and FeCl3(250.2mM) in the mixed solution, adjusting the pH of the mixed solution to 10 with a 5M NaOH solution, shaking at room temperature for 3h, filtering the product, and drying in a vacuum drying oven at 80 ℃ for 40h in vacuum to obtain the ferroferric oxide/carbon-based material.
S2, dispersing 0.2g of the ferroferric oxide/carbon-based material prepared in the step S1 in 50mL of ultrapure water, and performing ultrasonic dispersion for 15 min. Then 0.2mL of pyrrole monomer was added thereto and sonication was continued for 20 min. After the reaction is finished, 5mL of concentrated hydrochloric acid is dropwise added into the reaction product, ultrasonic treatment is carried out for 60min, the product is obtained by filtration, and the product is washed by water and methanol for 3 times respectively and then is dried in a vacuum drying oven for 10 hours at 65 ℃ in vacuum, so as to obtain the carbon-based polypyrrole composite material C.
Example 4:
the invention relates to a preparation method of a carbon-based polypyrrole composite material, which is implemented according to the following steps:
and S1, selecting biochar as the carbon-based material. Dispersing 15g of carbon-based material in 300mL of FeCl2(32.5mM) and FeCl3(65.0mM) in the mixed solution, adjusting the pH of the mixed solution to 10 with a 5M NaOH solution, shaking at room temperature for 1.5h, filtering the product, and drying in a vacuum drying oven at 60 ℃ for 20h to obtain the ferroferric oxide/carbon-based material.
S2, dispersing 1.0g of the ferroferric oxide/carbon-based material prepared in the step S1 in 150mL of ultrapure water, and performing ultrasonic dispersion for 15 min. Then 2mL of pyrrole monomer was added thereto and sonication was continued for 25 min. After the reaction is finished, dropwise adding 10mL of concentrated hydrochloric acid into the mixture, performing ultrasonic treatment for 240min, filtering to obtain a product, washing the product with water and methanol for 3 times respectively, and performing vacuum drying in a vacuum drying oven at 70 ℃ for 15h to obtain the carbon-based polypyrrole composite material D.
Application examples
The carbon-based polypyrrole composites of examples 1-4 tested for removal of PFASs in water, comprising the following steps:
20mg of the carbon-based polypyrrole composite material prepared in examples 1 to 4 was added to 50mL of PFOA or PFOS-contaminated aqueous solution containing 200mg/L, and the mixture was placed in a constant temperature oscillator and oscillated at room temperature at 180 rpm for 40 hours. After the reaction is finished, measuring the content of PFOS or PFOA in the solution, and calculating the removal rate.
Comparative example 1
Comparative example 1 the specific procedure was the same as in the application example, except that the carbon-based polypyrrole composite material was replaced with the carbon-based material used to prepare the carbon-based polypyrrole composite material, and the specific steps were as follows:
20mg of the carbon-based material used for preparing the carbon-based polypyrrole composite material is added into 50mL of PFOA or PFOS polluted water containing 200mg/L of the carbon-based material, and the mixture is placed in a constant temperature oscillator and oscillated for 40 hours under the condition of 180 revolutions per minute at room temperature. After the reaction is finished, measuring the content of PFOS or PFOA in the solution, and calculating the removal rate.
Comparative example 2
The removal test of PFASs in water by using pure polypyrrole comprises the following specific steps:
s1 preparation of polypyrrole
The polypyrrole is synthesized by adopting in-situ chemical oxidation polymerization. Selecting Fe3+As an oxidizing agent, 1g of the oxidizing agent was dispersed in 70mL of ultrapure water, then 3mL of pyrrole monomer was added dropwise and subjected to sonication at room temperature for 120min, and the product was obtained by filtration, washed 3 times with ultrapure water and methanol each, and then dried under vacuum at 60 ℃ for 10 hours to obtain polypyrrole.
S2 application in polluted water body
The specific steps are the same as the application examples, except that the carbon-based polypyrrole composite material is replaced by pure polypyrrole. Namely, 20mg of pure polypyrrole is added into 50mL of PFOA or PFOS polluted water containing 200mg/L, and the mixture is placed in a constant temperature oscillator and oscillated for 40 hours under the condition of 180 r/min at room temperature. After the reaction is finished, measuring the content of PFOS or PFOA in the solution, and calculating the removal rate.
The results of the tests of the application examples and comparative examples 1 and 2 are shown in table 1:
TABLE 1 PFOA and PFOS removal Rate results
Figure BDA0003360862850000081
As can be seen from table 1, the removal rate of the carbon-based polypyrrole composite material prepared in examples 1 to 4 of the present invention to 200mg/L of PFOA and PFOS is improved by more than 70% compared with the removal rate of both the carbon-based material and pure polypyrrole, which proves that the carbon-based polypyrrole composite material prepared by the synthesis method has a great advantage in removing PFASs in water, and exhibits great application potential, and this provides a technical support for removing PFASs with the carbon-based polypyrrole composite material of the present invention.
Fifth, stability test
The carbon-based polypyrrole composite material prepared in example 1 is subjected to stability test, and the specific steps are as follows:
s1, adding 20mg of the carbon-based polypyrrole composite material prepared in example 1 into 50mL of PFOA or PFOS polluted water containing 200mg/L of the carbon-based polypyrrole composite material, placing the mixture in a constant temperature oscillator, and oscillating the mixture for 40 hours at the room temperature of 180 r/min.
S2, after the reaction time is over, the composite material is centrifugally separated. After drying, the composite material is placed in a methanol solution, and the content of the composite material is 0.2 g/L. After shaking at room temperature for 10h, the composite was centrifuged and step 1 of example 3 was repeated. And (3) carrying out multiple cycles, and verifying the stability of the material after multiple adsorption-regeneration-adsorption.
The test result is shown in fig. 2, and it can be seen from fig. 2 that after the carbon-based polypyrrole composite material regenerated by methanol is subjected to adsorption-regeneration-adsorption for at least 5 times, the removal rate of the material to PFOA or PFOS still reaches over 90%, which is equivalent to the initial adsorption efficiency, which indicates that the carbon-based polypyrrole composite material prepared by the method has better stability, adsorption sites are not lost after repeated use, which indicates that the prepared composite material is more stable, the loaded polypyrrole microspheres are not easy to be lost, and the potential safety risk of nano toxicity generated by the nanoparticles can be reduced.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. A preparation method of a carbon-based polypyrrole composite material is characterized by comprising the following steps:
s1 preparation of ferroferric oxide/carbon-based material
Loading ferroferric oxide on a carbon-based material by adopting a coprecipitation method to prepare the ferroferric oxide/carbon-based material;
s2: preparation of carbon-based polypyrrole composite material
Dispersing the ferroferric oxide/carbon-based material in ultrapure water, performing ultrasonic treatment for 10-30min, then adding pyrrole monomer, performing continuous ultrasonic treatment for 10-30min, after the reaction is finished, dropwise adding hydrochloric acid into the material, performing ultrasonic treatment for 60-240min, then filtering to obtain a product, sequentially cleaning the product for several times with water and methanol, and then placing the product in a vacuum drying oven for vacuum drying for 10-20h at the temperature of 60-80 ℃ to prepare the carbon-based polypyrrole composite material.
2. The method as claimed in claim 1, wherein the carbon-based material in step S1 includes but is not limited to one or more of biochar, activated carbon, graphene, and graphene oxide.
3. The method for preparing a carbon-based polypyrrole composite material according to claim 1, wherein the method for preparing the ferriferrous oxide/carbon-based material in step S1 is not limited to the coprecipitation method, and may include one or more of a dipping-calcining method, a hydrothermal synthesis method, and a chemical reduction method.
4. The method for preparing the carbon-based polypyrrole composite material according to claim 1, wherein the ratio of the mass (g) of the ferroferric oxide/carbon-based material to the ultrapure water (mL) in the step S2 is in a range of 1:150 to 1: 500.
5. The preparation method of the carbon-based polypyrrole composite material according to claim 1, wherein the ratio of the mass (g) of the ferroferric oxide/carbon-based material to the volume (mL) of the pyrrole monomer in the step S2 is in a range of 3:1 to 1: 50.
6. The method as claimed in claim 1, wherein the ratio of the volume (mL) of pyrrole monomer to the volume (mL) of hydrochloric acid in step S2 is in the range of 1:3 to 1: 150.
7. The method as claimed in claim 1, wherein the hydrochloric acid used in step S2 is concentrated hydrochloric acid, and dilute hydrochloric acid is not used.
8. Carbon-based polypyrrole composite material obtained by the method for preparing carbon-based polypyrrole composite material according to any of claims 1 to 6.
9. Use of a carbon-based polypyrrole composite material according to claim 7 for the removal of PFASs in water.
10. The method for removing PFASs in water by using the carbon-based polypyrrole composite material according to claim 7, wherein the method comprises the following steps: adding the carbon-based polypyrrole composite material into a PFOA or PFOS polluted water body.
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Publication number Priority date Publication date Assignee Title
CN115672280A (en) * 2022-11-27 2023-02-03 四川轻化工大学 Preparation method of perfluorooctanoic acid adsorbent
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