CN110124722A - A kind of monatomic catalyst of nitrogen-doped carbon Base Metal and its preparation method and application - Google Patents

A kind of monatomic catalyst of nitrogen-doped carbon Base Metal and its preparation method and application Download PDF

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CN110124722A
CN110124722A CN201910501816.5A CN201910501816A CN110124722A CN 110124722 A CN110124722 A CN 110124722A CN 201910501816 A CN201910501816 A CN 201910501816A CN 110124722 A CN110124722 A CN 110124722A
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nitrogen
catalyst
preparation
metal
doped carbon
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牛建瑞
丁鹏佳
李再兴
胡广志
李卓然
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Hebei University of Science and Technology
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Hebei University of Science and Technology
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J27/00Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
    • B01J27/24Nitrogen compounds
    • B01J35/615
    • B01J35/633
    • B01J35/647
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/72Treatment of water, waste water, or sewage by oxidation
    • C02F1/722Oxidation by peroxides
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/72Treatment of water, waste water, or sewage by oxidation
    • C02F1/725Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • C02F2101/38Organic compounds containing nitrogen
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00Use of specific compounds during water treatment
    • C02F2305/02Specific form of oxidant
    • C02F2305/026Fenton's reagent

Abstract

The present invention provides a kind of monatomic catalyst of nitrogen-doped carbon Base Metal and its preparation method and application.The present invention selects hard template method to prepare the monatomic catalyst of metal, using amino-contained organism and organism containing chlorine as polymerized monomer, using transition metal salt as source metal, pass through the proportionate relationship and reaction condition between control accurate template, organic monomer, metallic salt, organic monomer can be achieved in the in-situ polymerization of template surface and synchronous chelate transitional metal ion, prepare the monoatomic metal catalyst of high exposure.This method for preparing catalyst can guarantee the load capacity of monoatomic metal to the full extent, and can avoid the appearance that nitrogen-doped carbon material wraps up metal oxide situation by Reasonable Regulation And Control preparation condition.Furthermore the also active advantage high, metal loss rate is low and power of regeneration is strong of the fenton catalyst of this method preparation.

Description

A kind of monatomic catalyst of nitrogen-doped carbon Base Metal and its preparation method and application
Technical field
The present invention relates to material preparation technical field more particularly to a kind of monatomic catalyst of nitrogen-doped carbon Base Metal and Preparation method and application.
Background technique
Fenton oxidation technology is with ferrous ion (Fe2+) it is catalyst, with hydrogen peroxide (H2O2) carry out chemical oxidation Wastewater treatment method.Fenton reagent is also referred to as by the system that ferrous ion and hydrogen peroxide form, it can generate the hydroxyl of strong oxidizing property Base free radical generates organic free radical with hardly degraded organic substance in aqueous solution and is allowed to structure destruction, final oxygenolysis.Fenton Oxidation technology is due to easy to operate, and the advantages that oxidability is strong is widely used, however there are iron ions to be easy to run off for Fenton's reaction, The problems such as scum yield is big, and regeneration efficiency is low, and catalyst service life is short limits its further scale application.
Porous carbon materials are due to excellent with conductivity height, resistance to acid and alkali, large specific surface area and adjustable pore structure etc. Point has been obtained in catalysis oxidation field and is quite widely applied, and iron ion, which is supported on porous carbon materials, to be passed through The strong suction-operated of carbon material avoids the loss of iron ion to a certain extent, solves what iron ion in Fenton reagent was easy to run off Problem.But when the carbon-supported catalysts being commonly used are used for catalytic oxidation treatment polluted water body, still remain reaction rate Slowly, catalyst activity is poor, and required throwing amount is larger and catalyst stability is poor, the problem of can not reusing.In order into One step improves the activity and stability of catalyst, researches and develops a kind of novel carbon-supported catalysts, to solve the problems, such as that Fenton reagent is intrinsic, It has a very important significance.
Summary of the invention
For the carbon-supported catalysts being commonly used in the prior art for when handling polluted water body, there is reaction speed Rate is slow, and catalyst activity is poor, and required throwing amount is larger and catalyst stability is poor, the problem of can not reusing, this hair It is bright that a kind of monatomic catalyst of nitrogen-doped carbon Base Metal and its preparation method and application is provided.
In order to solve the above technical problems, present invention provide the technical scheme that
A kind of preparation method of the monatomic catalyst of nitrogen-doped carbon Base Metal, the preparation method include the following steps:
Step 1: soluble transition metal salt and template are added to the water, impregnate, it is dry, obtain presoma;
Step 2: the presoma, the amine-containing organic matter of liquid and liquid chlorinated organics are mixed, it is uniformly dispersed, flows back Reaction, it is dry, obtain preliminary catalytic agent;
Step 3: the preliminary catalytic agent is carried out high temperature cabonization under inert atmosphere protection, secondary catalysts are obtained;
The secondary catalysts are immersed in acid solution or aqueous slkali and remove template agent removing by step 4, are washed, dry, obtain institute State the monatomic catalyst of nitrogen-doped carbon Base Metal.
Compared with the existing technology, the preparation of the preparation method of the monatomic catalyst of nitrogen-doped carbon Base Metal provided by the invention Method has the advantages that
In the preparation method of existing polymer chelated mineral salt catalyst, due to metal salt and containing existing between carbon polymer Stronger physisorption causes carbon containing polymer surfaces to be adsorbed with a large amount of metal salt, so that being carbonized subsequent Metal salt is oxidized so that the catalyst surface finally prepared limits catalyst activity there are a large amount of metal oxide in journey Further increase.The present invention uses template dispersed metal ion, is conducive to metal ion and is dispersed on carrier;Pass through Organic monomer synchronous chelated metal ions during template in situ Polymerization generates carbon nitrogen carriers, avoid metal from Physical absorption between son and carbon nitrogen carriers, not only increases the load capacity of metal salt, it is ensured that without metal oxygen in catalyst Compound occurs, and significantly improves the activity of catalyst.
Meanwhile using amine-containing Orqanics Monomer and chlorinated organics monomer as the polymerization for preparing carbon nitrogen carriers in the present invention The HCl that monomer can be such that polymerization process occurs rapidly, and remove in polymerization process can also build the acyclic acidic of polymer surfaces Border, to guarantee at a certain temperature, metal ion during the synchronous chelated metal ions reaction of organic monomer in-situ polymerization Will not oxidation by air generate metal oxide, for metal ion during participating in catalysis reaction, catalytic efficiency is obvious high In metal oxide, therefore, the preparation method of the monatomic catalyst of nitrogen-doped carbon Base Metal provided by the invention is remarkably improved The catalytic activity of catalyst.In addition to this, the amino in amine-containing organic matter has reduction, so as to directly utilize property more The catalyst containing bivalent metal ion is prepared in stable trivalent metal salt, avoids in preparation process metal to be oxidized as far as possible and asks The appearance of topic.
The present invention generates the synchronous chelated metal ions of carbon nitrogen carriers in template in situ Polymerization by organic monomer Metal ion activity component and carbon nitrogen catalysis material are organically combined, significantly improve rate of catalysis reaction, greatly reinforce by method To the degradation effect of organic pollutant;Meanwhile catalyst prepared by the present invention can by the chelation between metal-N The reunion of metal ion in preparation process is avoided, the loss of metal ion in catalytic reaction process can be also significantly reduced, improve The power of regeneration of catalyst;And preparation method is simple, has broad application prospects.
Heretofore described inert gas is the inert gas of this field routine, such as nitrogen, helium.
Preferably, the soluble transition metal salt is iron chloride, frerrous chloride, cobalt chloride, nickel chloride, ferric nitrate, nitre At least one of sour cobalt, ferrous nitrate or nickel nitrate.
It is furthermore preferred that the soluble transition metal salt is iron chloride.
Preferred transition metal salt is conducive to metal element chelate on carbon nitrogen carriers, improve metal ion and carrier it Between binding force, reduce catalyst in active component loss, improve the activity and service life of catalyst.
Preferably, the template is SBA-16, calcium carbonate, γ-Al2O3, silica, MCM-41 or MCM-48.
It is furthermore preferred that the template is calcium carbonate.
Material structure and pattern directly affect catalytic performance, and the preparation method in the present invention has universality, using not The monatomic catalyst of metal of various structure and pattern is prepared in isostructural template.
Currently preferred template can make the cellular structure of catalyst more excellent, and pore distribution is more uniform, make Catalyst obtained has high-specific surface area and hierarchical porous structure, to provide more active sites for catalysis reaction, improves The reactivity of catalyst, and preferred template is removed more easily by pickling or alkali cleaning in the follow-up process.
Preferably, the amine-containing organic matter of the liquid is amino-containing C3Aliphatic hydrocarbon.
Preferably, the amine-containing organic matter of the liquid is 1,2- propane diamine or 1,3- propane diamine.
It is furthermore preferred that the amine-containing organic matter is 1,2- propane diamine.
Preferably, the liquid chlorinated organics are the 1- chlorinated aliphatic hydrocarbon containing 1-4 carbon atom.
Preferably, the chlorinated organics be carbon trichloride, carbon tetrachloride, dichloroethanes, n-propyl chloride, dichloropropane or 1,4- dichloroetane.
It is furthermore preferred that the chlorinated organics are carbon tetrachloride.
By dehydrogenation and dechlorination polymerization occurs for preferred amine-containing organic matter and chlorinated organics, and polymerization reaction is rapid, Carbon nitrogen skeleton can be quickly formed, good coordination environment is built, chelates metal ion and carbon nitrogen skeleton, and utilize nitrogen Supplied for electronic acts on the power of regeneration that catalyst can be improved.
Preferably, in step 1, the molar ratio of the template, soluble metallic salt and water is 1:0.01-0.05:15- 35。
It is furthermore preferred that the molar ratio of the template, soluble metallic salt and water is 1:0.0179:16.7 in step 1.
Preferably, in step 2, the mass ratio of the amine-containing organic matter of the presoma, liquid and liquid chlorinated organics is 1: 1-5:5-10。
It is furthermore preferred that in step 2, the mass ratio of the amine-containing organic matter of the presoma, liquid and liquid chlorinated organics is 1:2.7:6.0。
The ratio of preferred each substance, is conducive to metal ion and is equably doped in carbon nitrogen skeleton, and in carbon nitrogen skeleton N chelate, avoid metal ion more, cause metal ion mixing uneven, form more metal oxide, in turn Cause digestion of metallic ion more in Fenton oxidation reaction;Or metal ion is less, the appearance of the bad problem of activity.
Optionally, in step 1, dip time 15-30min.
Preferably, in step 1, drying temperature is 100-120 DEG C, drying time 8-10h.
Preferably, in step 2, reflux temperature is 40-120 DEG C, reflux time 6-8h.
It is furthermore preferred that reflux temperature is 70 DEG C, reflux time 8h in step 2.
Optionally, in step 2, drying temperature is 110-130 DEG C, drying time 8-10h.
Preferably, in step 3, the heating rate of high temperature cabonization is 3-10 DEG C/min, and stopping temperature is 400-800 DEG C, is stopped Staying the time is 4-6h.
It is furthermore preferred that in step 3, the heating rate of high temperature cabonization is 5 DEG C/min, and stopping temperature is 600 DEG C, when stop Between be 5h.
Preferred reaction temperature, reaction time, drying temperature, drying time and high temperature cabonization mode, are conducive to construct Specific surface area is high, structure and inoxidizability is stable, active site the is highly exposed monatomic catalyst of metal.
Preferably, the acid solution is hydrochloric acid solution or hydrofluoric acid solution, and the aqueous slkali is sodium hydroxide solution;It is described The concentration of acid solution/or the aqueous slkali is 1-3mol/L.
The present invention also provides a kind of monatomic catalyst of nitrogen-doped carbon Base Metal, and the material is by above-mentioned preparation method system It is standby.
The present invention also provides the above-mentioned monatomic catalyst of nitrogen-doped carbon Base Metal in catalyzing oxidizing degrading organic pollutant In application.
The monatomic catalyst of the metal that the present invention is prepared has excellent catalytic activity, and metal ion is (such as ferrous iron Ion) exist with the N in carbon nitrogen skeleton in the form chelated, metal ion is equably entrained in carbon nitrogen skeleton, realizes gold The immobilization for belonging to ion, compared with traditional Fenton reagent, catalytic activity and degradation of the catalyst provided by the invention to organic matter Efficiency significantly improves, moreover, avoiding metal ion readily soluble appearance gone wrong during Fenton oxidation, significantly improves and urges The service life of agent can effectively solve the intrinsic of current fenton catalyst as the fenton catalyst of degradation of organic substances Problem.
Detailed description of the invention
Fig. 1 is transmission electron microscope (TEM) photo for the monatomic catalyst of nitrogen-doped carbon Base Metal that embodiment 1 is prepared;
Fig. 2 is the X-ray diffraction (XRD) that Fig. 1 is the monatomic catalyst of nitrogen-doped carbon Base Metal that embodiment 1 is prepared Map;
Fig. 3 is transmission electron microscope (TEM) photo for the monatomic catalyst of nitrogen-doped carbon Base Metal that embodiment 2 is prepared;
Fig. 4 is transmission electron microscope (TEM) photo for the monatomic catalyst of nitrogen-doped carbon Base Metal that embodiment 3 is prepared;
Fig. 5 is transmission electron microscope (TEM) photo for the monatomic catalyst of nitrogen-doped carbon Base Metal that embodiment 4 is prepared.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to Limit the present invention.
In order to better illustrate the present invention, it is illustrated below by embodiment is further.
Embodiment 1
Step 1: the Iron trichloride hexahydrate of 1.0g (0.01mol) calcium carbonate and 0.0483g (0.000179mol) is dissolved in In the deionized water of 3ml, 25min is stood, 110 DEG C of dry 9h obtain FeCl3@CaCO3Presoma;
Step 2: taking 1.0g FeCl3@CaCO3Presoma, 2.7g 1,2- propane diamine and 6.0g carbon tetrachloride in flask, Ultrasonic disperse 5~10 minutes, in 70 DEG C of reflux 8h, 120 DEG C of dry 10h;
Step 3: solid after drying is placed in tube furnace, vacuumize, lead to nitrogen, be carbonized 5h at 600 DEG C, heating speed Degree is 5 DEG C/min, obtains carbonized product;
Step 4: washing carbonized product with the HCl solution of 1mol/L, repeatedly washed with deionized water, it is dry at 110 DEG C 8h obtains to obtain the monatomic catalyst of nitrogen-doped carbon Base Metal (Fe-N-C catalyst).
The catalytic performance of catalyst is evaluated using the method for Fenton oxidation degrading malachite green, prepares 50mg/L malachite Clear water solution, takes 100mL in conical flask, weighs M-N-C catalyst 0.03g, is added in conical flask, adds the dioxygen of 15 μ L Conical flask is put into shaking table by water, and shaking table temperature is 25 DEG C, revolving speed 120rpm, is reacted 5 hours, and malachite green removal rate is 96.8%.After repeating five times according to above-mentioned experiment condition, the removal rate of malachite green is 89.5%.
Transmission electron microscope (TEM) photo for the Fe-N-C catalyst being prepared is as shown in Figure 1.
The XRD spectrum for the Fe-N-C catalyst being prepared is as shown in Fig. 2, it can be seen from the figure that inside in catalyst There is no a presence of metallic crystal, it was demonstrated that metal is existing in the form of an ion.
The BET test result of calcium carbonate template in catalyst and embodiment 1 prepared by embodiment 1 is as shown in table 1.
Table 1
Material Specific surface area (m2/g) Kong Rong (cm3/g) Aperture (nm)
Calcium carbonate 35.691 30.512 0.208
Fe-N-C catalyst 306.871 0.073 3.811
Embodiment 2
A kind of preparation method of the monatomic catalyst of nitrogen-doped carbon Base Metal:
Step 1: the Iron trichloride hexahydrate of 0.5g (0.005mol) calcium carbonate and 0.049g (0.00018mol) is dissolved in In the deionized water of 3ml, 20min is stood, 110 DEG C of dry 9h obtain FeCl3@CaCO3Presoma;
Step 2: taking 0.5g FeCl3@CaCO3Presoma, 2.5g 1,2- propane diamine and 5.0g carbon tetrachloride in flask, Ultrasonic disperse 5~10 minutes, in 70 DEG C of reflux 8h, 120 DEG C of dry 9h;
Step 3: the solid after drying is placed in tube furnace, vacuumize, lead to nitrogen, be carbonized 6h at 400 DEG C, heating Speed is 3 DEG C/min, obtains carbonized product;
Step 4: washing carbonized product with the HCl solution of 2mol/L, repeatedly washed with deionized water, it is dry at 110 DEG C 9h obtains the monatomic catalyst of nitrogen-doped carbon Base Metal (Fe-N-C catalyst).
Transmission electron microscope (TEM) photo of the monatomic catalyst of nitrogen-doped carbon Base Metal is as shown in Figure 3.
The catalytic performance of catalyst is evaluated using the method for Fenton oxidation degrading malachite green, prepares 50mg/L malachite Clear water solution, takes 100mL in conical flask, weighs Fe-N-C catalyst 0.03g, is added in conical flask, adds the dioxygen of 15 μ L Conical flask is put into shaking table by water, and shaking table temperature is 25 DEG C, revolving speed 120rpm, is reacted 5 hours, and malachite green removal rate is 90.5%.After repeating five times according to above-mentioned experiment condition, the removal rate of malachite green is 80.3%.
Embodiment 3
A kind of preparation method of the monatomic catalyst of nitrogen-doped carbon Base Metal:
Step 1: the Iron trichloride hexahydrate of 1.0g (0.01mol) calcium carbonate and 0.049g (0.000103mol) is dissolved in In the deionized water of 3ml, 30min is stood, 100 DEG C of dry 10h obtain FeCl3@CaCO3Presoma;
Step 2: taking 1.0g FeCl3@CaCO3Presoma, 1.7g 1,2- propane diamine and 5.2g carbon tetrachloride in flask, Ultrasonic disperse 5~10 minutes, in 70 DEG C of reflux 8h, 120 DEG C of dry 8h;
Step 3: the solid after drying is placed in tube furnace, vacuumize, lead to nitrogen, be carbonized 4h at 800 DEG C, heating Speed is 10 DEG C/min, obtains carbonized product;
Step 4: washing carbonized product with the HCl solution of 3mol/L, repeatedly washed with deionized water, it is dry at 110 DEG C 8h obtains the monatomic catalyst of nitrogen-doped carbon Base Metal (Fe-N-C catalyst).
Transmission electron microscope (TEM) photo of the monatomic catalyst of nitrogen-doped carbon Base Metal is as shown in Figure 4.
The catalytic performance of catalyst is evaluated using the method for Fenton oxidation degrading malachite green, prepares 50mg/L malachite Clear water solution, takes 100mL in conical flask, weighs Fe-N-C catalyst 0.03g, is added in conical flask, adds the dioxygen of 15 μ L Conical flask is put into shaking table by water, and shaking table temperature is 25 DEG C, revolving speed 120rpm, is reacted 5 hours, and malachite green removal rate is 85.7%.After repeating five times according to above-mentioned experiment condition, the removal rate of malachite green is 73.6%.
Embodiment 4
A kind of preparation method of the monatomic catalyst of nitrogen-doped carbon Base Metal:
Step 1: the Iron trichloride hexahydrate of 1.0g (0.01mol) calcium carbonate and 1.28g (0.00049mol) is dissolved in 6ml Deionized water in, stand 150min, 120 DEG C of dry 8h obtain FeCl3@CaCO3Presoma;
Step 2: taking 1.0g FeCl3@CaCO3Presoma, 3.5g 1,2- propane diamine and 7.6g carbon tetrachloride in flask, Ultrasonic disperse 5~10 minutes, in 70 DEG C of reflux 8h, 120 DEG C of dry 9h;
Step 3: the solid after drying is placed in tube furnace, vacuumize, lead to nitrogen, be carbonized 5h at 600 DEG C, heating Speed is 5 DEG C/min, obtains carbonized product;
Step 4: washing carbonized product with the HCl solution of 1mol/L, repeatedly washed with deionized water, it is dry at 110 DEG C 8h obtains the monatomic catalyst of nitrogen-doped carbon Base Metal (Fe-N-C catalyst).
Transmission electron microscope (TEM) photo of the monatomic catalyst of nitrogen-doped carbon Base Metal is as shown in Figure 5.
The catalytic performance of catalyst is evaluated using the method for Fenton oxidation degrading malachite green, prepares 50mg/L malachite Clear water solution, takes 100mL in conical flask, weighs Fe-N-C catalyst 0.03g, is added in conical flask, adds the dioxygen of 15 μ L Conical flask is put into shaking table by water, and shaking table temperature is 25 DEG C, revolving speed 120rpm, is reacted 5 hours, and malachite green removal rate is 88.3%.After repeating five times according to above-mentioned experiment condition, the removal rate of malachite green is 80.3%.
Embodiment 5-9
The preparation method of the monatomic catalyst of nitrogen-doped carbon Base Metal of embodiment 5-9 is same as Example 1, specific anti- Answer condition referring to table 1.
1 embodiment 5-9 reaction condition of table
In embodiment 5-9, when template is silica, washed in step 4 using the sodium hydroxide solution of 1-3mol/L Carbide is washed, template is removed;When template is SBA-16, MCM-41, MCM-48, the hydrogen of 1-3mol/L is used in step 4 Fluorspar acid solution washs carbide, removes template;Template is γ-Al2O3When, carbon is washed using the hydrochloric acid solution of 1-3mol/L Compound removes template.
Comparative example 1
This comparative example provides a kind of preparation method of monatomic catalyst of metal:
Step 1: 2.7g melamine is dissolved in methanol, 0.0483g (0.000179mol) ferric chloride (FeCl36H2O) is molten Yu Shuizhong after mixing above two solution, 1.0g (0.01mol) calcium carbonate is added under agitation, is uniformly dispersed, stands 30min obtains presoma in 110 DEG C of dry 8h;
Step 2: the presoma in step 1 is warming up to 600 DEG C under nitrogen atmosphere protection, heating rate is 5 DEG C/ Min, be carbonized 5h, obtains catalyst intermediate;
Step 3: the catalyst intermediate prepared in step 2 is cleaned with the hydrochloric acid solution of 1-3mol/L, it is dry, it obtains Catalyst.
The catalytic performance of catalyst is evaluated using the method for Fenton oxidation degrading malachite green, prepares 50mg/L malachite Clear water solution, takes 100mL in conical flask, weighs catalyst 0.03g, is added in conical flask, adds the hydrogen peroxide of 15 μ L, will bore Shape bottle is put into shaking table, and shaking table temperature is 25 DEG C, revolving speed 120rpm, and after reaction 5 hours, malachite green removal rate is 75.3%.After repeating five times according to above-mentioned experiment condition, the removal rate of malachite green is 59.7%.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention Made any modification, equivalent replacement or improvement etc., should all be included in the protection scope of the present invention within mind and principle.

Claims (10)

1. a kind of preparation method of the monatomic catalyst of nitrogen-doped carbon Base Metal, which comprises the steps of:
Step 1: soluble transition metal salt and template are added to the water, impregnate, it is dry, obtain presoma;
Step 2: the presoma, the amine-containing organic matter of liquid and liquid chlorinated organics are mixed, it is uniformly dispersed, back flow reaction, It is dry, obtain preliminary catalytic agent;
Step 3: the preliminary catalytic agent is carried out high temperature cabonization under inert atmosphere protection, secondary catalysts are obtained;
The secondary catalysts are immersed in acid solution or aqueous slkali and remove template agent removing by step 4, are washed, dry, obtain the nitrogen Adulterate the monatomic catalyst of carbon based metal.
2. the preparation method of the monatomic catalyst of nitrogen-doped carbon Base Metal as described in claim 1, which is characterized in that it is described can Dissolubility transition metal salt is iron chloride, frerrous chloride, cobalt chloride, nickel chloride, ferric nitrate, cobalt nitrate, ferrous nitrate or nickel nitrate At least one of;And/or
The template is SBA-16, calcium carbonate, γ-Al2O3, silica, MCM-41 or MCM-48.
3. the preparation method of the monatomic catalyst of nitrogen-doped carbon Base Metal as claimed in claim 1 or 2, which is characterized in that institute Stating the amine-containing organic matter of liquid is amino-containing C3Aliphatic hydrocarbon;And/or
The liquid chlorinated organics are the 1- chlorinated aliphatic hydrocarbon containing 1-4 carbon atom.
4. the preparation method of the monatomic catalyst of nitrogen-doped carbon Base Metal as claimed in claim 3, which is characterized in that the liquid The amine-containing organic matter of state is 1,2- propane diamine or 1,3- propane diamine;And/or
The liquid chlorinated organics are carbon trichloride, carbon tetrachloride, dichloroethanes, n-propyl chloride, dichloropropane or 1,4- bis- Chlorobutane.
5. the preparation method of the monatomic catalyst of nitrogen-doped carbon Base Metal as described in claim 1, which is characterized in that step 1 In, the molar ratio of the template, soluble metallic salt and water is 1:0.01-0.05:15-35;And/or
In step 2, the mass ratio of the amine-containing organic matter of the presoma, liquid and liquid chlorinated organics is 1:1-5:5-10.
6. the preparation method of the monatomic catalyst of nitrogen-doped carbon Base Metal as described in claim 1, which is characterized in that step 1 In, drying temperature is 100-120 DEG C, drying time 8-10h;And/or
In step 2, reflux temperature is 40-120 DEG C, reflux time 6-8h.
7. the preparation method of the monatomic catalyst of nitrogen-doped carbon Base Metal as described in claim 1, which is characterized in that step 3 In, the heating rate of high temperature cabonization is 3-10 DEG C/min, and stopping temperature is 400-800 DEG C, residence time 4-6h.
8. the preparation method of the monatomic catalyst of nitrogen-doped carbon Base Metal as described in claim 1, which is characterized in that the acid Solution is hydrochloric acid solution or hydrofluoric acid solution, and the aqueous slkali is sodium hydroxide solution;The acid solution and/or the aqueous slkali Concentration be 1-3mol/L.
9. a kind of monatomic catalyst of nitrogen-doped carbon Base Metal, which is characterized in that mixed by the described in any item nitrogen of claim 1-8 The preparation method of the miscellaneous monatomic catalyst of carbon based metal is prepared.
10. the monatomic catalyst of nitrogen-doped carbon Base Metal as claimed in claim 9 is in catalysis Fenton oxidation degradable organic pollutant In application.
CN201910501816.5A 2019-06-11 2019-06-11 A kind of monatomic catalyst of nitrogen-doped carbon Base Metal and its preparation method and application Pending CN110124722A (en)

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CN114367295B (en) * 2020-10-15 2023-04-18 中国科学院大连化学物理研究所 Application of monodisperse carbon-supported non-noble metal material as ethylbenzene anaerobic dehydrogenation catalyst
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CN113410479A (en) * 2021-06-17 2021-09-17 济南大学 Preparation method and application of transition metal monoatomic and nitrogen-phosphorus-doped carbon sphere
CN113318767A (en) * 2021-06-22 2021-08-31 邯郸市赵都精细化工有限公司 Catalyst for preparing amino acid by ammoniating carbonyl acid and preparation method and application thereof

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