CN115414958A - Melamine-doped biochar material and application thereof - Google Patents
Melamine-doped biochar material and application thereof Download PDFInfo
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- CN115414958A CN115414958A CN202211174307.4A CN202211174307A CN115414958A CN 115414958 A CN115414958 A CN 115414958A CN 202211174307 A CN202211174307 A CN 202211174307A CN 115414958 A CN115414958 A CN 115414958A
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- 239000000463 material Substances 0.000 title claims abstract description 54
- 239000012265 solid product Substances 0.000 claims abstract description 28
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- 238000000197 pyrolysis Methods 0.000 claims abstract description 19
- 229920000877 Melamine resin Polymers 0.000 claims abstract description 17
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims abstract description 17
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 10
- 239000010902 straw Substances 0.000 claims abstract description 10
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 9
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 claims abstract description 9
- 231100000719 pollutant Toxicity 0.000 claims abstract description 9
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 7
- 239000003610 charcoal Substances 0.000 claims abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 16
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- 238000005303 weighing Methods 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 12
- HFZWRUODUSTPEG-UHFFFAOYSA-N 2,4-dichlorophenol Chemical compound OC1=CC=C(Cl)C=C1Cl HFZWRUODUSTPEG-UHFFFAOYSA-N 0.000 claims description 11
- FHHJDRFHHWUPDG-UHFFFAOYSA-L peroxysulfate(2-) Chemical compound [O-]OS([O-])(=O)=O FHHJDRFHHWUPDG-UHFFFAOYSA-L 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 8
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- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 235000005822 corn Nutrition 0.000 claims description 7
- 239000012153 distilled water Substances 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- 238000007873 sieving Methods 0.000 claims description 6
- VGVRPFIJEJYOFN-UHFFFAOYSA-N 2,3,4,6-tetrachlorophenol Chemical class OC1=C(Cl)C=C(Cl)C(Cl)=C1Cl VGVRPFIJEJYOFN-UHFFFAOYSA-N 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 3
- 230000002378 acidificating effect Effects 0.000 claims description 2
- 238000000498 ball milling Methods 0.000 claims description 2
- 239000000356 contaminant Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 230000007935 neutral effect Effects 0.000 claims description 2
- 238000004321 preservation Methods 0.000 claims description 2
- 230000015556 catabolic process Effects 0.000 abstract description 10
- 238000006731 degradation reaction Methods 0.000 abstract description 10
- 230000003213 activating effect Effects 0.000 abstract description 3
- 239000003575 carbonaceous material Substances 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- ISPYQTSUDJAMAB-UHFFFAOYSA-N 2-chlorophenol Chemical compound OC1=CC=CC=C1Cl ISPYQTSUDJAMAB-UHFFFAOYSA-N 0.000 abstract 2
- 230000000052 comparative effect Effects 0.000 description 6
- 230000007547 defect Effects 0.000 description 5
- 230000004913 activation Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000004098 Tetracycline Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
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- 230000000593 degrading effect Effects 0.000 description 2
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- 229960002180 tetracycline Drugs 0.000 description 2
- 229930101283 tetracycline Natural products 0.000 description 2
- 235000019364 tetracycline Nutrition 0.000 description 2
- 150000003522 tetracyclines Chemical class 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 238000001237 Raman spectrum Methods 0.000 description 1
- 240000000111 Saccharum officinarum Species 0.000 description 1
- 235000007201 Saccharum officinarum Nutrition 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 229940088710 antibiotic agent Drugs 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- YMGGAHMANIOXGP-UHFFFAOYSA-L disodium;oxido sulfate Chemical compound [Na+].[Na+].[O-]OS([O-])(=O)=O YMGGAHMANIOXGP-UHFFFAOYSA-L 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- OGJPXUAPXNRGGI-UHFFFAOYSA-N norfloxacin Chemical compound C1=C2N(CC)C=C(C(O)=O)C(=O)C2=CC(F)=C1N1CCNCC1 OGJPXUAPXNRGGI-UHFFFAOYSA-N 0.000 description 1
- 229960001180 norfloxacin Drugs 0.000 description 1
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- 239000002243 precursor Substances 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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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
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/24—Nitrogen compounds
-
- 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/08—Heat treatment
- B01J37/082—Decomposition and pyrolysis
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- 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
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
- C02F2101/345—Phenols
-
- 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
- C02F2101/30—Organic compounds
- C02F2101/36—Organic compounds containing halogen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical
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- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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Abstract
The invention discloses a melamine-doped biochar material and application thereof, and relates to the technical field of carbon material processing. According to the invention, straw powder, melamine and sodium carbonate are mixed and ball-milled, then high-temperature pyrolysis is carried out at 900 ℃, and then solid products after pyrolysis are sequentially ground, washed, dried and screened to obtain the biochar material doped with melamine. The melamine-doped charcoal material is used for activating persulfate, so that the activated persulfate has high oxidability, water containing chlorophenol pollutants is rapidly treated, and the degradation rate of the chlorophenol pollutants in the water is up to more than 98%.
Description
Technical Field
The invention belongs to the technical field of carbon material processing, and particularly relates to a melamine-doped biochar material and application thereof.
Background
The biochar is formed by pyrolyzing biomass under anaerobic conditions, and has the excellent characteristics of low production cost, large specific surface area, rich oxygen-containing functional groups on the surface and the like, so that the activation of persulfate by using the biochar as an activating agent of a high-grade oxidation system becomes a research hotspot at present, and the biochar is widely applied to the fields of pollutant adsorption, catalytic degradation and the like.
At present, the traditional biochar has relatively poor persulfate activation performance, for example, zhang and the like use wood chips for pyrolysis to prepare biochar activated Peroxymonosulfate (PMS) for degrading antibiotics, and when the adding amount of the biochar is 0.8g/L, the degradation rate of norfloxacin is 0.0095min -1 And the final degradation rate after 300min is 94.21%. Zhang et al use sugarcane biochar to activate PMS for degrading tetracycline, and when the adding amount of the biochar is 0.5g/L, the degradation rate of tetracycline is 0.0016min -1 And the final degradation rate after 120min is 90.2%. As can be seen, the traditional biochar has few activated sites, so that the consumption of the biochar is relatively large, and the catalytic rate cannot reach an ideal level.
Therefore, the modification of the biochar to improve the active sites of the biochar and the activation performance of the biochar on persulfate is a current research hotspot.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a melamine-doped biochar material and application thereof. The specific surface area of the biochar material prepared by the invention is 1238-1357m 2 /g。
The invention is realized by adopting the following technical scheme:
the melamine-doped biochar material provided by the invention is prepared by the following steps:
(1) Weighing the following raw materials: weighing corn straw powder, melamine and sodium carbonate according to a preparation ratio of 3-6.5, and mixing and ball-milling to obtain a mixed material;
(2) High-temperature pyrolysis: placing the mixed material in a tubular furnace for roasting, introducing nitrogen before roasting to exhaust oxygen in the tubular furnace, then heating to 900 ℃, and preserving heat for 2 hours; naturally cooling to room temperature after the heat preservation is finished to obtain a pyrolysis solid product;
(3) And (3) post-treatment: grinding the pyrolysis solid product, and then washing the pyrolysis solid product by using distilled water and ethanol until the pH value is constant; and finally, drying and sieving to obtain the melamine-doped charcoal material.
Preferably, the temperature rise rate of the tube furnace in the step (2) is 10 ℃/min.
Preferably, the drying temperature in the step (3) is 60 ℃, and the drying time is 6h.
Preferably, step (4) is to pass the dried solid product through a 100 mesh sieve.
The invention also provides an application of the melamine-doped biochar material, which specifically comprises the following steps:
s1, adding persulfate into a water body with the chlorophenols pollutant content of 100mg/L to enable the concentration of peroxymonosulfate in the water body to be 1mM;
s2, adjusting the pH value of the water body to be neutral or weakly acidic;
and S3, adding the melamine-doped biochar material, wherein the adding amount of the melamine-doped biochar material in the water body is 0.05-0.2g/L, fully stirring for 30-60min, and filtering.
Preferably, the chlorophenol-type contaminants include, but are not limited to, 2, 4-dichlorophenol.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, straw powder, melamine and sodium carbonate are mixed and ball-milled, then high-temperature pyrolysis is carried out at 900 ℃, and then solid products after pyrolysis are sequentially ground, washed, dried and screened to obtain the biochar material doped with melamine. The melamine-doped biochar material disclosed by the invention is used for activating persulfate, so that the activated persulfate has higher oxidability, a water body containing chlorophenols pollutants is rapidly treated, and the degradation rate of the chlorophenols pollutants in the water body is up to more than 98%.
Drawings
FIG. 1 is an SEM image of an unmodified biochar material of comparative example 1;
FIG. 2 is an SEM image of a melamine doped biochar material prepared in example 1;
FIG. 3 is a graph showing the degradation profile of 2, 4-dichlorophenol in a water body by the biochar materials prepared in examples 1-4 and comparative example 1.
Detailed Description
In order to make the objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Example 1
A melamine-doped biochar material is specifically prepared by the following steps:
(1) Weighing the following raw materials: weighing corn straw powder (with the average particle size of 1 mm) with the preparation ratio of 3;
(2) Introducing nitrogen into the tubular furnace to evacuate oxygen, then placing the mixed material into the tubular furnace, heating the tubular furnace to 900 ℃ for pyrolysis (the heating rate is 10 ℃/min), preserving heat for 2h, and naturally cooling to room temperature;
(3) Grinding the pyrolyzed solid product, and then washing the solid product by using distilled water and ethanol until the pH value is constant;
(4) And (3) drying the washed solid product in a constant-temperature drying oven at 60 ℃ for 6 hours, and screening the dried solid product through a 100-mesh screen to obtain the melamine-doped biochar material (NBC-5 for short) as shown in figure 2.
Example 2
A melamine-doped biochar material is specifically prepared by the following steps:
(1) Weighing the following raw materials: weighing corn straw powder, melamine and sodium carbonate in a preparation ratio of 3;
(2) Introducing nitrogen into the tubular furnace to evacuate oxygen, then placing the mixed material into the tubular furnace, heating the tubular furnace to 900 ℃ for pyrolysis (the heating rate is 10 ℃/min), preserving heat for 2 hours, and naturally cooling to room temperature;
(3) Grinding the pyrolyzed solid product, and then washing the solid product by using distilled water and ethanol until the pH value is constant;
(4) And (3) drying the washed solid product in a constant-temperature drying oven at 60 ℃ for 6h, and sieving the dried solid product through a 100-mesh sieve to obtain the melamine-doped biochar material (NBC-3 for short).
Example 3
A melamine-doped biochar material is specifically prepared by the following steps:
(1) Weighing the following raw materials: weighing corn straw powder, melamine and sodium carbonate according to a preparation ratio of 3;
(2) Introducing nitrogen into the tubular furnace to evacuate oxygen, then placing the mixed material into the tubular furnace, heating the tubular furnace to 900 ℃ for pyrolysis (the heating rate is 10 ℃/min), preserving heat for 2h, and naturally cooling to room temperature;
(3) Grinding the pyrolyzed solid product, and then washing the solid product by using distilled water and ethanol until the pH value is constant;
(4) And (3) drying the washed solid product in a constant-temperature drying oven at 60 ℃ for 6h, and sieving the dried solid product through a 100-mesh sieve to obtain the melamine-doped biochar material (NBC-4 for short).
Example 4
A melamine-doped biochar material is specifically prepared by the following steps:
(1) Weighing the following raw materials: weighing corn straw powder, melamine and sodium carbonate according to a preparation ratio of 3;
(2) Introducing nitrogen into the tubular furnace to evacuate oxygen, then placing the mixed material into the tubular furnace, heating the tubular furnace to 900 ℃ for pyrolysis (the heating rate is 10 ℃/min), preserving heat for 2h, and naturally cooling to room temperature;
(3) Grinding the pyrolyzed solid product, and then washing the solid product by using distilled water and ethanol until the pH value is constant;
(4) And (3) drying the washed solid product in a constant-temperature drying oven at 60 ℃ for 6 hours, and sieving the dried product through a 100-mesh sieve to obtain the melamine-doped biochar material (NBC-6 for short).
Comparative example 1
A preparation method of a biochar material comprises the following steps:
(1) Weighing the following raw materials: weighing corn straw powder with a preparation ratio of 3;
(2) Introducing nitrogen into the tubular furnace to evacuate oxygen, then placing the mixed material into the tubular furnace, heating the tubular furnace to 900 ℃ for pyrolysis (the heating rate is 10 ℃/min), preserving heat for 2 hours, and naturally cooling to room temperature;
(3) Grinding the pyrolyzed solid product, and then washing the solid product by using distilled water and ethanol until the pH value is constant;
(4) And (3) drying the washed solid product in a constant-temperature drying oven at 60 ℃ for 6 hours, and sieving the dried product by a 100-mesh sieve to obtain the non-nitrogenated modified biochar material (BC for short) as shown in figure 1.
As can be seen from fig. 1 and 2, the non-nitrided modified biochar and the nitrogen-doped modified biochar materials exhibit different apparent structures. The surface of the biochar material (BC) of comparative example 1 had an irregularly pleated hollow tubular structure, which was formed by carbonizing a plant cell structure. In contrast to the dense morphology and smooth surface of BC, nitrogen modified biochar (NBC-5) forms a fluffy and porous structure in the presence of melamine, since melamine decomposes during pyrolysis releasing gases. Compared with BC, the increase of the porosity caused by the appearance of the inner pores and the escape of volatile components of the NBC-5 provides a larger surface area for the NBC-5, and increases the active sites of the NBC surface related to adsorption and degradation.
The biochar materials prepared in examples 1-4 and comparative example 1 were subjected to performance testing, as shown in table 1.
TABLE 1
As can be seen from Table 1, the C = O/C-O atomic ratios (atomic ratios, A (C = O/C-O)) of BC and NBC-3 to NBC-6 are 0.25, 1.18, 1.25, 1.50 and 1.40 respectively, which indicates that the doping ratio of the straw powder to the melamine in the precursor has an important influence on the content of oxygen-containing groups in the biochar material.
The structural characteristics of the biochar sample are researched by utilizing Raman spectrum, wherein BC and NBC samples are 1320 and 1580cm -1 Two prominent peaks are shown, namely a D peak and a G peak. The D peak originates from defects and disorder in the carbon layer, while the G peak is closely related to the crystalline and graphitic structure. Therefore, the height ratio (I) of the D peak to the G peak is utilized D /I G ) To reflect the defect degree of the biochar sample. In BC I D /I G Only 0.68, with a significant increase in ID/IG after nitrogen doping, NBC-5 was the highest, reaching 1.14, indicating that more defect sites were formed by integration of nitrogen atoms into the sp2 carbon network.
The biochar materials prepared in examples 1-4 and comparative example 1 are used for respectively treating water containing 2,4-DCP, and the specific treatment method is as follows:
s1, preparing a 2,4-DCP pollutant solution with the concentration of 100mg/L by taking 2, 4-dichlorophenol (2, 4-DCP) as a model pollutant, and measuring 100mL into a 100mL conical flask;
s2, adding 30.8mg of sodium Peroxymonosulfate (PMS) and adjusting the pH value of the solution to 7;
s3, adding 10mg of the prepared biochar material, fully stirring for 40min, and filtering (filtering by a 0.22-micron filter membrane).
The degradation curve of 2, 4-dichlorophenol in the water body was examined as shown in FIG. 3. If the biochar material is not added, only PMS is added, and the removal rate of 2,4-DCP in the water body within 40min is only 5.7%, which shows that PMS has weak oxidation performance at room temperature and needs to be activated. Compared with the prior art, the reaction rate is remarkably improved after the modified biochar is added, and the 2,4-DCP can be completely removed within 30min under a NBC-5/PMS/2,4-DCP solution system, which shows that the NBC can effectively activate PMS to degrade the 2,4-DCP. And the TOC removal rate reaches 65.9% within 90min, which shows that the NBC-5/PMS system has moderate mineralization efficiency. The characterization data of the biochar combined with table 1 can be preliminarily judged, and the NBC has the advantages of high specific surface area, abundant defect structures, high N content and high C = O/C-O ratio, possibly exposes more active sites and is favorable for catalytic reaction.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.
Claims (6)
1. The melamine-doped biochar material is characterized in that the specific surface area of the biochar material is 1238-1357m 2 The biochar material is prepared by the following steps:
(1) Weighing the following raw materials: weighing corn straw powder, melamine and sodium carbonate in a preparation ratio of 3-6.5, and mixing and ball-milling to obtain a mixed material;
(2) High-temperature pyrolysis: placing the mixed material in a tubular furnace for roasting, introducing nitrogen before roasting to exhaust oxygen in the tubular furnace, then heating to 900 ℃, and preserving heat for 2 hours; naturally cooling to room temperature after the heat preservation is finished to obtain a pyrolysis solid product;
(3) And (3) post-treatment: grinding the pyrolysis solid product, and then washing the pyrolysis solid product by using distilled water and ethanol until the pH value is constant; and finally, drying and sieving to obtain the melamine-doped charcoal material.
2. The melamine doped biochar material of claim 1, wherein the temperature rise rate of the tube furnace of step (2) is 10 ℃/min.
3. The melamine doped biochar material of claim 1, wherein the drying temperature in step (3) is 60 ℃ and the drying time is 6 hours.
4. The melamine doped biochar material of claim 1, wherein step (4) passes the dried solid product through a 100 mesh screen.
5. The use of the melamine doped biochar material according to any one of claims 1 to 4, characterized by comprising the steps of:
s1, adding persulfate into a water body with the chlorophenols pollutant content of 100mg/L to enable the concentration of peroxymonosulfate in the water body to be 1mM;
s2, adjusting the pH value of the water body to be neutral or weakly acidic;
and S3, adding the melamine-doped biochar material, wherein the adding amount of the melamine-doped biochar material in the water body is 0.05-0.2g/L, fully stirring for 30-60min, and filtering.
6. The use according to claim 5, wherein the chlorophenol-type contaminant includes, but is not limited to, 2, 4-dichlorophenol.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115990502A (en) * | 2023-01-10 | 2023-04-21 | 吉林大学 | Nitrogen-sulfur co-doped modified biochar material and application thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106582765A (en) * | 2016-12-23 | 2017-04-26 | 中南大学 | Sodium doped graphite phase carbon nitride prepared by one-step synthesis and application thereof |
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