CN110479332A - Porous flake phosphating sludge/carbon composite material and preparation method - Google Patents

Porous flake phosphating sludge/carbon composite material and preparation method Download PDF

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Publication number
CN110479332A
CN110479332A CN201910597759.5A CN201910597759A CN110479332A CN 110479332 A CN110479332 A CN 110479332A CN 201910597759 A CN201910597759 A CN 201910597759A CN 110479332 A CN110479332 A CN 110479332A
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carbon
source
preparation
phosphating sludge
composite material
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冯其
张震
尧克光
李辉
王海江
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Southwest University of Science and Technology
Southern University of Science and Technology
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Southwest 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
    • B01J27/14Phosphorus; Compounds thereof
    • B01J27/186Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J27/188Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium with chromium, molybdenum, tungsten or polonium
    • B01J27/19Molybdenum
    • B01J35/33
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/32Freeze drying, i.e. lyophilisation
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00Electrolytic production of inorganic compounds or non-metals
    • C25B1/01Products
    • C25B1/02Hydrogen or oxygen
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B11/00Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/04Electrodes; Manufacture thereof not otherwise provided for characterised by the material
    • C25B11/051Electrodes formed of electrocatalysts on a substrate or carrier
    • C25B11/073Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material
    • C25B11/091Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material consisting of at least one catalytic element and at least one catalytic compound; consisting of two or more catalytic elements or catalytic compounds

Abstract

The invention belongs to materials processing technology fields, and in particular to a kind of composite material and preparation method of porous flake phosphating sludge/carbon, the preparation method include the following steps: to provide molybdenum source, phosphorus source, carbon source and sodium chloride;The molybdenum source, phosphorus source, carbon source and sodium chloride are dissolved in aqueous solvent, mixed solution is obtained;The mixed solution is dried, precursor powder is obtained;The precursor powder is subjected to calcination processing, then cleaning treatment, obtains porous flake phosphating sludge/carbon composite material.Preparation method of the invention can obtain phosphating sludge/carbon composite of high-purity, two-dimensional sheet, and whole preparation process is safe and reliable, and process conditions are simple and easy to control, production cost is low, be suitable for industrialization large-scale production;Obtained porous flake phosphating sludge/carbon composite has the characteristics that phosphating sludge partial size is small, with high purity, effective ratio area is big, and shows the good catalytic activity of similar platinum, can be widely applied to catalytic field.

Description

Porous flake phosphating sludge/carbon composite material and preparation method
Technical field
The invention belongs to materials processing technology fields, and in particular to a kind of composite material of porous flake phosphating sludge/carbon and Preparation method.
Background technique
The noble metals such as platinum are due to being therefore widely used in petrochemical industry, organic synthesis, fuel electricity with catalytic effect In the catalytic process in the fields such as pond, automobile and electronics industry, still, on the one hand reserves are few on earth for such noble metal, And constantly reducing, on the other hand the price is very expensive, and application cost is high.Just because of this, people always search for alternative The new catalytic material of the noble metal catalysts such as platinum.
In numerous new catalytic materials, phosphating sludge (MoP) is due to its good chemically and thermally mechanical stability, outstanding Corrosion resistance and good conductivity, attract the extensive interest of people.Especially phosphating sludge is being shown with platinum class seemingly Electronic structure and after having a significant catalysis characteristics (Energy Environ.Sci., 2014,7,2624-2629), phosphating sludge Just it is considered as partially or completely substituting the potential material of noble metal platinum, therefore has broad application prospects.
Currently, the conventional preparation techniques of phosphating sludge are by molybdenum oxide and hydrogen phosphide (PH3) or phosphate thermal decomposition production Raw hydrogen phosphide reacts synthesis under the high temperature conditions.But the phosphating sludge particle size that this method is prepared is big, and specific surface area is small, purity It is low, limit the catalytic activity of phosphating sludge.For the specific surface area for improving phosphating sludge, scientific research personnel develops some preparation Gao Bibiao The method of area phosphating sludge, such as the gas phase reaction of volatile metal compounds, vapor-phase reactant such as PH3Equal to solid phase metal oxide The reaction of object, but these methods, the technological parameter for needing to control is more, and reaction process is complex.For another example, Publication No. The Chinese invention patent of CN108654659A provides a kind of phosphating sludge/graphene composite nano material and preparation method thereof, the system Preparation Method needs to use nitrogen protection gas and is reacted in micro-wave oven, is easy to be mixed into air impact product in the synthesis process Quality.For another example the Chinese invention patent of Publication No. CN108588713A discloses a kind of CVD and prepares two-dimentional phosphatization molybdenum film Metal molybdenum foil substrate is placed in vacuum reaction furnace by preparation method, this method, and metal molybdenum foil base is made under certain reaction temperature Bottom is reacted with carrier gas, obtains two-dimentional phosphatization molybdenum film, and it is inconvenient that the phosphatization molybdenum film that this method obtains is removed from substrate, can apply Field is limited.
Therefore, the prior art has much room for improvement.
Summary of the invention
The purpose of the present invention is to provide a kind of composite material and preparation methods of porous flake phosphating sludge/carbon, it is intended to Solve the low technical problem of the catalytic activity for hydrogen evolution of existing phosphating sludge.
For achieving the above object, The technical solution adopted by the invention is as follows:
One aspect of the present invention provides a kind of preparation method of the composite material of porous flake phosphating sludge/carbon, including walks as follows It is rapid:
Molybdenum source, phosphorus source, carbon source and sodium chloride are provided;
The molybdenum source, phosphorus source, carbon source and sodium chloride are dissolved in aqueous solvent, mixed solution is obtained;
The mixed solution is dried, precursor powder is obtained;
The precursor powder is subjected to calcination processing, then cleaning treatment, obtains porous flake phosphating sludge/carbon and answer Condensation material.
Another aspect of the present invention provides a kind of composite material of porous flake phosphating sludge/carbon, by of the invention above-mentioned porous The preparation method of sheet phosphating sludge/carbon composite material is made.
The preparation method of porous flake phosphating sludge provided by the invention/carbon (MoP/C) composite material, with molybdenum source, phosphorus source, Carbon source and sodium chloride are raw material, are dissolved in after obtaining mixed solution in aqueous solvent, make solvent volatilize to obtain through being dried Precursor powder will form phosphating sludge/carbon solid of sodium chloride package, then cleaned place after precursor powder calcining Reason removal sodium chloride, to obtain nanometer phosphating sludge/carbon composite of porous flake;During the preparation process, sodium chloride due to Its excellent chemically and thermally mechanical stability will not influence phosphating sludge product in high temperature sintered and cooling recrystallization process It is formed, and plays the role of pore creating material and orientation template, while removal easy to clean, therefore, preparation method energy of the invention Phosphating sludge/carbon composite of high-purity, two-dimensional sheet is obtained, whole preparation process is safe and reliable, and process conditions are simply easy Control, production cost are low, are suitable for industrialization large-scale production.Finally, porous flake phosphating sludge/carbon which obtains is compound Material has the characteristics that phosphating sludge partial size is small, with high purity, effective ratio area is big, and the good catalysis for showing similar platinum is living Property, it can be widely applied to catalytic field.
Detailed description of the invention
Phosphating sludge/carbon composite X-ray powder diffraction that Fig. 1 is 1-3 of the embodiment of the present invention and prepared by comparative example (XRD) curve graph;
Fig. 2 is phosphating sludge/carbon composite scanning electron microscope (SEM) and electronics prepared by the embodiment of the present invention 1 Scattering energy spectrum (EDS mapping) figure;
Fig. 3 is phosphating sludge/carbon composite scanning electron microscope (SEM) figure prepared by the embodiment of the present invention 2;
Fig. 4 is phosphating sludge/carbon composite scanning electron microscope (SEM) figure prepared by the embodiment of the present invention 3;
Fig. 5 is phosphating sludge/carbon composite scanning electron microscope (SEM) figure of comparative example of the present invention preparation;
Fig. 6 is phosphating sludge/carbon composite transmission electron microscope (TEM) figure prepared by the embodiment of the present invention 1;
Fig. 7 is the N of the embodiment of the present invention 1 and comparative example2Adsorption desorption curve;Wherein, a is embodiment 1, and b is comparative example;
Phosphating sludge/carbon composite that Fig. 8 is 1-3 of the embodiment of the present invention and prepared by comparative example is anti-as the liberation of hydrogen of catalyst Answer polarization curve comparison diagram.
Specific embodiment
In order to which technical problems, technical solutions and advantageous effects to be solved by the present invention are more clearly understood, below in conjunction with Embodiment, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used to explain The present invention is not intended to limit the present invention.
On the one hand, the embodiment of the invention provides a kind of preparation method of the composite material of porous flake phosphating sludge/carbon, packets Include following steps:
S01: molybdenum source, phosphorus source, carbon source and sodium chloride are provided;
S02: the molybdenum source, phosphorus source, carbon source and sodium chloride are dissolved in aqueous solvent, mixed solution is obtained;
S03: the mixed solution is dried, precursor powder is obtained;
S04: the precursor powder is subjected to calcination processing, then cleaning treatment, obtains porous flake phosphating sludge/carbon Composite material.
The preparation method of the composite material of porous flake phosphating sludge/carbon provided in an embodiment of the present invention, with molybdenum source, phosphorus source, Carbon source and sodium chloride are raw material, are dissolved in after obtaining mixed solution in aqueous solvent, make solvent volatilize to obtain through being dried Precursor powder will form phosphating sludge/carbon solid of sodium chloride package, then cleaned place after precursor powder calcining Reason removal sodium chloride, to obtain nanometer phosphating sludge/carbon composite of porous flake;During the preparation process, sodium chloride due to Its excellent chemically and thermally mechanical stability will not influence phosphating sludge product in high temperature sintered and cooling recrystallization process It is formed, and plays the role of pore creating material and orientation template, while removal easy to clean, therefore, the preparation of the embodiment of the present invention Method can obtain phosphating sludge/carbon composite of high-purity, two-dimensional sheet, and whole preparation process is safe and reliable, process conditions It is simple and easy to control, production cost is low, be suitable for industrialization large-scale production.
In one embodiment, the molybdenum source in above-mentioned steps S01 is the molybdenum source of water-soluble solvent, and the molybdenum source selected is answered It can be dissolved in simultaneously in identical solvent when with carbon source and phosphorus source.Specifically, the molybdenum source be Ammonium Molybdate Tetrahydrate, sodium molybdate, At least one of potassium molybdate, zinc molybdate and molybdic acid;Phosphorus source is ammonium dihydrogen phosphate, sodium dihydrogen phosphate, dibastic sodium phosphate and phosphorus At least one of acid dihydride potassium;The carbon source is at least one of dicyan diamino and melamine;The aqueous solvent is simultaneously Molybdenum source, phosphorus source and carbon source can be dissolved, such as deionized water or distilled water.And sodium chloride is porous flake phosphatization in preparation process Molybdenum/carbon composite material is formed by template.
In one embodiment, the molybdenum source, phosphorus source, carbon source and sodium chloride are dissolved in the mistake of aqueous solvent in above-mentioned steps S02 Cheng Zhong, the molybdenum source, phosphorus source, carbon source and sodium chloride mass ratio be 1:1:10:(10~100);In the proportional region, not only Sodium chloride can be allowed to play good template action, and porous flake phosphating sludge/carbon composite can be formed well.In In specific embodiment, the molybdenum source, phosphorus source, carbon source and sodium chloride mass ratio be 1:1:10:10 or the molybdenum source, phosphorus source, The mass ratio of carbon source and sodium chloride is 1:1:10:30 or the molybdenum source, phosphorus source, carbon source and sodium chloride mass ratio be 1:1: 10:80 or the molybdenum source, phosphorus source, carbon source and sodium chloride mass ratio be 1:1:10:100.
More specifically, the abundant dissolution in order to realize molybdenum source, it can be using stirring, ultrasonic treatment.In one embodiment, will It includes: that water first is added in the molybdenum source, phosphorus source and carbon source that the molybdenum source, phosphorus source, carbon source and sodium chloride, which are dissolved in the step in solvent, In solvent, it is stirred by ultrasonic 10~30min (molybdenum source, phosphorus source and carbon source are substantially completely dissolved in aqueous solvent at this time), adds chlorine Change sodium and continue 2~10h of stirring, to form the mixed solution sufficiently dissolved.
In one embodiment, the drying process in above-mentioned steps S03 is freeze-drying process.Specifically, described cold Freezing the step of being dried includes: that the mixed solution is first freezed to 20~28h under conditions of -20~-50 DEG C, then will Product vacuum after frost is freeze-dried 64~80h.It can preferably recrystallize to form porous two-dimensional sheet structure under this condition. Precursor powder can be obtained in grinding after freeze-drying process.
In one embodiment, the temperature of the calcination processing in above-mentioned steps S04 is 700~1000 DEG C;The calcination processing Time be 1~5h;Preferably, during calcination processing, temperature is heated up with the heating rate of 1~10 DEG C/min.And institute It states calcination processing to carry out in an inert atmosphere, inert atmosphere is generally nitrogen or argon gas.
It in one embodiment, include: to use the product after the calcination processing the step of cleaning treatment in above-mentioned steps S04 Water filters 1~5 time.Phosphating sludge/carbon surface of solids package sodium chloride can be cleaned well so specifically to be filtered with water The method that can be suction filtration or centrifugal filtration or ultrasound filtration, (using silver nitrate to washing until sodium chloride is cleaned completely Chloride ion is detected in water afterwards).
It preferably, further include vacuum drying after the cleaning treatment the step of.Specifically, described vacuum drying Temperature is 40~80 DEG C;The vacuum drying time be 6~for 24 hours.It in this way can be by phosphating sludge/carbon composite after cleaning Middle moisture is sufficiently dry.
The preparation method of the composite material of above-mentioned porous flake phosphating sludge/carbon provided in an embodiment of the present invention, using it is low at Originally, sodium chloride that is environmental-friendly and facilitating removal is template, PH of the whole process without severe toxicity3Equal gases generate, and can get super Thin sheet phosphating sludge/carbon composite, entire production process is safe and reliable, and process conditions are simple and easy to control, production cost is low, fits In industrialization large-scale production.Corresponding performance detection is carried out to the final product of acquisition, specifically includes XRD, SEM, EDS, BET There is phosphating sludge partial size small (average diameter 10nm), purity with TEM characterization and the test of electrochemistry Hydrogen Evolution Performance, the composite material High, the features such as effective ratio area is big, and the catalytic activity of similar platinum is shown, therefore can be widely applied to liberation of hydrogen plus hydrogen, hydrogen The catalytic fields such as solution, hydrogen reduction, carrier.
On the other hand, the embodiment of the present invention also provides a kind of composite material of porous flake phosphating sludge/carbon, the composite material It is made by the preparation method of the composite material of above-mentioned porous flake phosphating sludge/carbon of the embodiment of the present invention.
The porous flake phosphatization that the preparation method of porous flake phosphating sludge/carbon composite material of the embodiment of the present invention obtains Molybdenum/carbon composite has the characteristics that phosphating sludge partial size is small, with high purity, effective ratio area is big, and shows the good of similar platinum Good catalytic activity, can be widely applied to catalytic field.
Specifically, the composite material of the porous flake phosphating sludge/carbon is used for liberation of hydrogen catalyst.In one embodiment, should Phosphating sludge average diameter of particles in composite material is 10nm.
The present invention successively carried out test of many times, and it is further detailed as reference pair invention progress now to lift A partial experiment result Thin description, is described in detail combined with specific embodiments below.
Embodiment 1
A kind of preparation method of porous flake phosphating sludge/carbon composite, comprising the following steps:
(1) 100mg Ammonium Molybdate Tetrahydrate, 100mg ammonium dihydrogen phosphate, 1000mg dicyan diamino are dissolved in 50mL deionization by In water, stirring, ultrasound continue stir about 30 minutes to being completely dissolved, obtain the first mixed solution;
(2) sodium chloride of 3000mg is added in the solution that is obtained to step (1), stirs to being completely dissolved, continues stirring 3 Hour, obtain the second mixed solution;
(3) the second mixed solution is put into -30 DEG C of refrigerator cabinet freezer and freezes 24 hours by, then by the production after frost Object is placed in vacuum freeze drier, is freeze-dried 72 hours, and dry solid powder is obtained, and is ground 10 minutes;
(4) precursor after drying is placed in nitrogen atmosphere and carries out calcination processing by, and the heating rate of calcining is 5 DEG C/ Min is warming up to 900 DEG C, and the calcining at constant temperature 3h at 900 DEG C, subsequent natural cooling.
(5) takes out solid after cooling, is washed 4 times with the method for suction filtration, ultrasound to product.Product is collected, and true 70 DEG C drying 12 hours in empty drying box.
Embodiment 2
A kind of preparation method of porous flake phosphating sludge/carbon composite, comprising the following steps:
(1) 100mg Ammonium Molybdate Tetrahydrate, 100mg ammonium dihydrogen phosphate, 1000mg dicyan diamino are dissolved in 50mL deionization by In water, stirring, ultrasound continue stir about 30 minutes to being completely dissolved, obtain the first mixed solution;
(2) sodium chloride of 1000mg is added in the solution that is obtained to step (1), stirs to being completely dissolved, continues stirring 3 Hour, obtain the second mixed solution;
(3) the second mixed solution is put into -30 DEG C of refrigerator cabinet freezer and freezes 24 hours by, then by the production after frost Object is placed in vacuum freeze drier, is freeze-dried 72 hours, and dry solid powder is obtained, and is ground 10 minutes;
(4) precursor after drying is placed in nitrogen atmosphere and carries out calcination processing by, and the heating rate of calcining is 5 DEG C/ Min is warming up to 900 DEG C, and the calcining at constant temperature 3h at 900 DEG C, subsequent natural cooling.
(5) takes out solid after cooling, is washed 4 times with the method for suction filtration, ultrasound to product.Product is collected, and true 70 DEG C drying 12 hours in empty drying box.
Embodiment 3
A kind of preparation method of porous flake phosphating sludge/carbon composite, comprising the following steps:
(1) 100mg Ammonium Molybdate Tetrahydrate, 100mg ammonium dihydrogen phosphate, 1000mg dicyan diamino are dissolved in 50mL deionization by In water, stirring, ultrasound continue stir about 30 minutes to being completely dissolved, obtain the first mixed solution;
(2) sodium chloride of 8000mg is added in the solution that is obtained to step (1), stirs to being completely dissolved, continues stirring 3 Hour, obtain the second mixed solution;
(3) the second mixed solution is put into -30 DEG C of refrigerator cabinet freezer and freezes 24 hours by, then by the production after frost Object is placed in vacuum freeze drier, is freeze-dried 72 hours, and dry solid powder is obtained, and is ground 10 minutes;
(4) precursor after drying is placed in nitrogen atmosphere and carries out calcination processing by, and the heating rate of calcining is 5 DEG C/ Min is warming up to 900 DEG C, and the calcining at constant temperature 3h at 900 DEG C, subsequent natural cooling.
(5) takes out solid after cooling, is washed 4 times with the method for suction filtration, ultrasound to product.Product is collected, and true 70 DEG C drying 12 hours in empty drying box.
Comparative example
A kind of preparation method of phosphating sludge/carbon composite (sodium chloride template is not added), comprising the following steps:
(1) 100mg Ammonium Molybdate Tetrahydrate, 100mg ammonium dihydrogen phosphate, 1000mg dicyan diamino are dissolved in 50mL deionization by In water, stirring, ultrasound continue stir about 30 minutes to being completely dissolved, obtain mixed solution;
(2) mixed solution is put into -30 DEG C of refrigerator cabinet freezer and freezes 24 hours by, then puts the product after frost It sets in vacuum freeze drier, is freeze-dried 72 hours, obtain dry solid powder, grind 10 minutes;
(3) precursor after drying is placed in nitrogen atmosphere and carries out calcination processing by, and the heating rate of calcining is 5 DEG C/ Min, is warming up to 900 DEG C, and the calcining at constant temperature 3h at 900 DEG C, and subsequent natural cooling obtains target product.
Performance test
Corresponding performance detection is carried out to the final product that embodiment 1-3 and comparative example obtain, specifically include XRD, SEM, EDS and TEM characterization and the test of electrochemistry Hydrogen Evolution Performance.
(1) XRD is tested
The final product of acquisition is tested according to the standard that conventional XRD is tested, test result is as shown in Fig. 1.
As can be known from Fig. 1, compared with phosphating sludge standard diffraction peak map PDF#24-0771 it is found that the embodiment of the present invention 1, 2,3 and comparative example synthesis phosphating sludge XRD diffraction maximum can be corresponding with standard spectrum, on the one hand prove the embodiment of the present invention 1 obtain The final product obtained is the phosphatization molybdenum material of high-purity, on the other hand also illustrates that sodium chloride will not influence phosphating sludge in synthesis process Object phase.
(2) SEM is tested
According to the mode of operation that conventional SEM is scanned, SEM sweep test carried out to the final product of embodiment 1, and to its into Row EDS test, specific test result such as Fig. 2.SEM sweep test, specific test result are carried out to the final product of embodiment 2 Such as Fig. 3.SEM sweep test, specific test result such as Fig. 4 are carried out to the final product of embodiment 3.Meanwhile most to comparative example Final product carries out SEM sweep test, test result Fig. 5.
From the SEM of Fig. 2 figure it is found that the final product that the preparation method of the embodiment of the present invention 1 obtains is the phosphorus of porous flake Change molybdenum/carbon composite, can be seen that molybdenum, phosphorus, carbon are uniformly distributed from EDS result, illustrate that phosphating sludge particle uniform load exists In carbon substrate.From Fig. 3 and Fig. 4 it is found that the NaCl of different quality is added, to 3 phosphating sludges of embodiment 2 and example/carbon material pattern It is affected with structure, finally influences its catalytic performance.As can be seen from Figure 5, comparative example is added without sodium chloride mould in the synthesis process Plate, obtained product reunite sintering seriously, have very with the product morphology of sodium chloride template and structure are added in embodiment 1,2 and 3 Big difference illustrates that sodium chloride template plays key effect during synthesizing phosphating sludge/carbon composite of porous flake.
(3) TEM is tested
Fig. 6 is phosphating sludge/carbon TEM figure prepared by embodiment 1, be can be seen that from TEM figure, phosphating sludge average diameter of particles is big About 10nm, it is more uniform be covered with super-thin sheet-shaped it is carbon-based on, further demonstrate the embodiment of the present invention 1 preparation phosphatization Molybdenum/carbon composite contains a large amount of two-dimensional sheet structure.
(4) BET is tested
Fig. 7 is the N of embodiment 1 and comparative example2Adsorption desorption curve, from Fig. 7 a it is found that the specific surface area of embodiment 1 is 175.9m2 g-1, the specific surface area of Fig. 7 b display comparative example is 69.7m2 g-1.Therefore, it is added in MoP/C synthesis process NaCl can dramatically increase the specific surface area of obtained product, be conducive to the active site for increasing catalyst, and then improve catalysis and live Property.
(5) catalytic hydrogen evolution is tested
Conventionally, porous flake phosphating sludge/carbon composite that embodiment 1,2,3 and comparative example obtain is used for Acid evolving hydrogen reaction, and its polarization curve is tested, it is specific that test results are shown in figure 8.
As it can be observed in the picture that when current density is 10mA cm-2When, overpotential is only 0.126V, illustrates that the embodiment of the present invention 1 obtains Porous flake phosphating sludge/carbon composite the Hydrogen Evolution Performance obtained is more than existing base metal evolving hydrogen reaction catalyst, performance The catalytic performance similar with noble metal catalyst out.
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 modifications, equivalent replacements, and improvements 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 composite material of porous flake phosphating sludge/carbon, which comprises the steps of:
Molybdenum source, phosphorus source, carbon source and sodium chloride are provided;
The molybdenum source, phosphorus source, carbon source and sodium chloride are dissolved in aqueous solvent, mixed solution is obtained;
The mixed solution is dried, precursor powder is obtained;
The precursor powder is subjected to calcination processing, then cleaning treatment, obtains porous flake phosphating sludge/carbon composite wood Material.
2. the preparation method of the composite material of porous flake phosphating sludge/carbon as described in claim 1, which is characterized in that described Being dried is freeze-drying process.
3. the preparation method of the composite material of porous flake phosphating sludge/carbon as claimed in claim 2, which is characterized in that described The step of freeze-drying process includes: that the mixed solution is first freezed to 20~28h under conditions of -20~-50 DEG C, then will Product vacuum after frost is freeze-dried 64~80h.
4. the preparation method of the composite material of porous flake phosphating sludge/carbon as described in claim 1, which is characterized in that described The temperature of calcination processing is 700~1000 DEG C;And/or
The time of the calcination processing is 1~5h;And/or
The heating rate of the calcination processing is 1~10 DEG C/min;And/or
The calcination processing carries out in an inert atmosphere.
5. the preparation method of the composite material of porous flake phosphating sludge/carbon as described in claim 1, which is characterized in that by institute It states in the step of molybdenum source, phosphorus source, carbon source and sodium chloride are dissolved in aqueous solvent, the mass ratio of the molybdenum source, phosphorus source, carbon source and sodium chloride For 1:1:10:(10~100);And/or
It includes: first by the molybdenum source, phosphorus source and carbon that the molybdenum source, phosphorus source, carbon source and sodium chloride, which are dissolved in the step in aqueous solvent, Source is added in aqueous solvent, and 10~30min is stirred by ultrasonic, adds sodium chloride and continues 2~10h of stirring;And/or
The step of cleaning treatment includes: to filter the water of the product after the calcination processing 1~5 time.
6. the preparation method of the composite material of porous flake phosphating sludge/carbon as described in any one in claim 1-5, feature exist In the molybdenum source is at least one of Ammonium Molybdate Tetrahydrate, sodium molybdate, potassium molybdate, zinc molybdate and molybdic acid;And/or
Phosphorus source is at least one of ammonium dihydrogen phosphate, sodium dihydrogen phosphate, dibastic sodium phosphate and potassium dihydrogen phosphate;And/or
The carbon source is at least one of dicyan diamino and melamine.
7. the preparation method of the composite material of porous flake phosphating sludge/carbon as described in any one in claim 1-5, feature exist In, the cleaning treatment the step of after, further include vacuum drying.
8. the preparation method of the composite material of porous flake phosphating sludge/carbon as claimed in claim 7, which is characterized in that described Vacuum drying temperature is 40~80 DEG C;And/or
The vacuum drying time be 6~for 24 hours.
9. a kind of composite material of porous flake phosphating sludge/carbon, which is characterized in that described in any item more by claim 1-8 The preparation method of hole sheet phosphating sludge/carbon composite material is made.
10. the composite material of porous flake phosphating sludge/carbon as claimed in claim 9, which is characterized in that the porous flake phosphorus Change molybdenum/carbon composite material and is used for catalyst.
CN201910597759.5A 2019-07-04 2019-07-04 Porous flake phosphating sludge/carbon composite material and preparation method Pending CN110479332A (en)

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Cited By (10)

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CN113457656A (en) * 2021-06-25 2021-10-01 中北大学 Molybdenum selenide/porous carbon composite structure light-controlled nanoenzyme, preparation method and application
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CN111304783A (en) * 2020-02-19 2020-06-19 东华大学 Molybdenum phosphide/carbon nanofiber composite material and preparation method and application thereof
CN111468160A (en) * 2020-04-15 2020-07-31 电子科技大学 Preparation of nickel-molybdenum-nitrogen co-doped carbon-based catalyst based on sodium chloride template
CN112028041A (en) * 2020-09-03 2020-12-04 中国科学院地球化学研究所 Carbon thermal reduction preparation method of MoP, product and application
CN112007673A (en) * 2020-09-09 2020-12-01 安徽师范大学 N-doped porous carbon-coated MoP nano rod material and preparation method and application thereof
CN112225187A (en) * 2020-10-15 2021-01-15 广东工业大学 Preparation method and application of porous molybdenum phosphide/carbon fiber composite material
CN113438883B (en) * 2021-06-21 2021-12-07 黑龙江工程学院 Preparation method and application of binary heterostructure wave-absorbing material molybdenum oxide-molybdenum phosphide
CN113438883A (en) * 2021-06-21 2021-09-24 黑龙江工程学院 Preparation method and application of binary heterostructure wave-absorbing material molybdenum oxide-molybdenum phosphide
CN113457656A (en) * 2021-06-25 2021-10-01 中北大学 Molybdenum selenide/porous carbon composite structure light-controlled nanoenzyme, preparation method and application
CN113457656B (en) * 2021-06-25 2023-01-31 中北大学 Molybdenum selenide/porous carbon composite structure light-controlled nanoenzyme, preparation method and application
CN113584502A (en) * 2021-07-28 2021-11-02 青岛科技大学 Preparation and application of molybdenum phosphide-ruthenium phosphide bimetal phosphide
CN113584502B (en) * 2021-07-28 2022-07-01 青岛科技大学 Preparation and application of molybdenum phosphide-ruthenium phosphide bimetal phosphide
CN115874138A (en) * 2021-09-27 2023-03-31 中国科学院福建物质结构研究所 Molybdenum-based composite material and preparation and application thereof
CN114203989A (en) * 2021-11-30 2022-03-18 五邑大学 FeP/Fe2P/NC composite material and preparation method thereof

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