CN106552674A - Aerogel carried nickel-phosphorus alloy catalysis material of a kind of nanofiber and preparation method thereof - Google Patents

Aerogel carried nickel-phosphorus alloy catalysis material of a kind of nanofiber and preparation method thereof Download PDF

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CN106552674A
CN106552674A CN201610861020.7A CN201610861020A CN106552674A CN 106552674 A CN106552674 A CN 106552674A CN 201610861020 A CN201610861020 A CN 201610861020A CN 106552674 A CN106552674 A CN 106552674A
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nanofiber
nickel
solution
phosphorus alloy
catalysis material
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CN106552674B (en
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刘轲
王栋
汪元
刘琼珍
李沐芳
王跃丹
王雯雯
鲁振坦
蒋海青
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Yangzhou Clouds New Mstar Technology Ltd
Wuhan Textile University
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Yangzhou Clouds New Mstar Technology Ltd
Wuhan Textile University
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    • B01J35/23
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/02Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
    • B01J31/06Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing polymers
    • B01J31/063Polymers comprising a characteristic microstructure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/26Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24
    • B01J31/28Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24 of the platinum group metals, iron group metals or copper
    • B01J35/396

Abstract

The invention discloses aerogel carried nickel-phosphorus alloy catalysis material of a kind of nanofiber and preparation method thereof, belongs to nano-functional material field.The catalysis material that the present invention is provided is made up of the nickel-phosphorus alloy nano-particle that Nanofiber Network skeleton and bag are attached to Nanofiber Network skeleton surface, and Nanofiber Network skeleton is made up of with the binding agent for being attached to nanofiber surface nanofiber.The preparation method of the present invention includes, it is separated initially with melt blending, disperses suspension modified and cryodesiccated method to prepare thermoplastic polymer nanofiber's fiber aeroge, then with thermoplastic polymer nanofiber's fiber aeroge as carrier, by the method for chemical deposition by nickel phosphorus nanoparticle deposition in the fiber surface of constitutionally stable aerogel material, the aerogel carried nickel-phosphorus alloy catalysis material of nanofiber is prepared.The preparation method process of the present invention is simple, it is easy to accomplish large-scale production, and the catalysis material for preparing has high specific surface area, porosity and preferable catalytic effect.

Description

Aerogel carried nickel-phosphorus alloy catalysis material of a kind of nanofiber and preparation method thereof
Technical field
The invention belongs to nano-functional material field, specifically belongs to a kind of aerogel carried nickel-phosphorus alloy of nanofiber and urges Change material and preparation method thereof.
Background technology
Trade effluent becomes the important factor of restriction socio-economic development at this stage.Pollutant nitrobenzene compounds Be a class be important industrial chemicals or intermediate while and be one of main organic pollution in environment, but p-nitrophenyl The Reduction Body p-aminophenol of phenol is a kind of common pharmacy, the intermediate of chemical industry, realizes turning waste into wealth, and meaning is notable.Nickel alloy It is a kind of cheap and widely used catalyst, it is obvious to the catalytic effect of the pollutant of paranitrophenol etc.Catalyst Including unsupported catalyst, another kind of is loaded catalyst, carrier mainly natural ore species used, adsorbent class, Ceramic-like and organic etc..Nanofiber is a kind of superfine fibre, with specific surface area is big, draw ratio big, is had after film forming Little aperture and big porosity, after being especially prepared into aeroge, the overall specific surface area and porosity of material will It is obviously improved, as carrier, prepared loaded catalyst will show very high catalysis activity.
Chinese invention patent application (application publication number:CN105148996A, applies for publication date:2015-12-16) disclose A kind of Membrane catalysis nickel nano fibrous membrane and preparation method thereof.The method prepares thermoplastic poly by the method for scatter coated Compound micro/nano fibrous membrane material, then deposits nickel alloy material in membrane material surfaces externally and internally by the method for chemical plating, is prepared into To the nickel micro/nano fibrous membrane material for pollutant catalytic decomposition.Advantage is that method is simply efficient, it is easy to volume production, catalysis material after The high-specific surface area feature of micro/nano fibrous membrane material is held, catalytic performance is excellent, flexible easy processing is easily isolated in application process With realization recycling.Have the disadvantage that the specific surface area and porosity of prepared thermoplastic polymer nanofiber's fibrous membrane is limited, should The catalytic performance of loading type nickel-based catalysis material need further to be lifted.
The content of the invention
To solve above-mentioned technical problem, the invention provides a kind of aerogel carried nickel-phosphorus alloy catalysis material of nanofiber And preparation method thereof.The present invention with thermoplastic polymer nanofiber's fiber aeroge as carrier, by the method for chemical deposition by nickel In the fiber surface of constitutionally stable aerogel material, carrier has high specific surface area and porosity to nanoparticle deposition, Improve the catalytic effect of catalyst.
For achieving the above object, the invention discloses a kind of aerogel carried nickel-phosphorus alloy catalysis material of nanofiber, urges Change material to be made up of the nickel-phosphorus alloy nano-particle that Nanofiber Network skeleton and bag are attached to Nanofiber Network skeleton surface, institute State Nanofiber Network skeleton to be made up of with the binding agent for being attached to nanofiber surface nanofiber, the nanofiber is by warm Thermoplastic polymer is constituted.
Further, the Nanofiber Network skeleton with the mass percent of nickel-phosphorus alloy nano-particle is:50~ 75%:25~50%, the nanofiber with the mass percent of binding agent is:50~80%:20~50%.
Yet further, in the nickel-phosphorus alloy nano-particle, the atom number percentage ratio of nickel and phosphorus is:50~80%:20 ~50%, and the particle diameter of nickel-phosphorus alloy nano-particle is 1~50nm.
Further, described adhesive is the one kind in polyvinyl alcohol, shitosan or poly-dopamine;The thermoplastic poly Compound is polyvinyl alcohol-ethylene copolymer, polypropylene, polyamide, polyethylene terephthalate, poly terephthalic acid the third two One kind in alcohol ester, polybutylene terephthalate (PBT) or polyurethane.
Present invention also offers a kind of preparation method of the aerogel carried nickel-phosphorus alloy catalysis material of nanofiber, including with Lower step:
1) prepare composite fibre:Thermoplastic polymer is uniformly mixed with acetylbutyrylcellulose, Jing double screw extruders Extrusion, pelletize, prepare thermoplastic polymer/acetylbutyrylcellulose composite, continue thermoplastic polymer/acetate butyrate Cellulose composite material Jing melt spinning machines carry out drawing-off, spinning, obtain composite fibre;
2) prepare nanofiber suspension:By the step 1) composite fibre for preparing is placed in acetone and flows back, extraction Normal temperature drying is carried out after taking out acetylbutyrylcellulose, thermoplastic polymer nanofiber's fiber is prepared, then by thermoplastic poly Compound nanofiber is scattered in mixed solution of the organic solvent with water by the concentration of 1~10g/L, is prepared finely dispersed Nanofiber suspension;
3) prepare binder solution:During binder solution is poly-vinyl alcohol solution, chitosan solution or dopamine solution One kind, the poly-vinyl alcohol solution are that polyvinyl alcohol is dissolved in the water to prepare;The chitosan solution is by shitosan Powder is dispersed in water and prepares;The dopamine solution is that Dopamine Hydrochloride powder is scattered in trishydroxymethylaminomethane The buffer solution of hydrochlorate is prepared;
4) prepare nanofiber aeroge:By the step 3) binder solution and the step 2 that prepare) receiving of preparing Rice fibrous suspension mix homogeneously, prepares nanofiber mixing suspension, nanofiber mixing suspension is placed in container In template, lyophilization in freezer dryer is then placed in again, nanofiber aeroge is prepared;
5) configure the bath of nickel nano fibrous membrane sensitizing solution, activating solution and nickel;
6) prepare the aerogel carried nickel-phosphorus alloy catalysis material of nanofiber:By the step 4) the nanofiber gas for preparing Gel immerses the step 5) in the nickel nano fibrous membrane sensitizing solution for preparing vibration absorption obtain the nanofiber aeroge being sensitized, Continue will the nanofiber aeroge of sensitization immerse the step 5) in the activating solution for preparing, vibration absorption obtains the nanometer for activating The nanofiber aeroge of activation is immersed oscillating reactionss in nickel bath, then deionized water and ethanol rinse by fiber aeroge, Dry again, that is, prepare the aerogel carried nickel-phosphorus alloy catalysis material of nanofiber.
Further, the step 5) in,
Configuration nickel nano fibrous membrane sensitizing solution:10g stannous chlorides are taken, mass concentration is 38% 30ml hydrochloric acid solutions, plus Enter in 1L deionized waters;
Configuration activating solution:0.25g Palladous chloride .s are taken, mass concentration is 38% 20ml hydrochloric acid solutions, is added to 1L deionizations In water;
Configuration nickel bath:In nickel bath, the molar concentration of bivalent nickel ion is 0.07~0.12mol/L, the matter of sodium hypophosphite Amount concentration is 16~40g/L, and the mass concentration of sodium acetate is 15~20g/L, and the mass concentration of triton x-100 is 5~10mg/ The mass concentration of L or Tween 80 is 5~10mg/L, and the mass concentration of sodium citrate is 8~10g/L, and the mass concentration of lactic acid is 10~12g/L, the acid-base value of the nickel bath is pH=4.5~5.0.
Yet further, the step 6) in, by the step 4) the nanofiber aeroge for preparing immerses the step 5) in the nano fibrous membrane sensitizing solution for preparing, it is ensured that bath raio is 30:1, the taking-up after vibration 1~5min of absorption at 15~25 DEG C, Obtain the nanofiber aeroge being sensitized, continue will the nanofiber aeroge of sensitization immerse the step 5) activating solution for preparing In, it is ensured that bath raio is 30:1, then deionized water cleaning is being taken out after vibration 1~5min of absorption at 15~25 DEG C, is being lived The nanofiber aeroge of change;To react in the nanofiber aeroge immersion nickel bath of activation, it is ensured that bath raio is 10:1, Ran Hou Take out after 10~20min of oscillating reactionss under constant temperature, respectively deionized water and ethanol rinse 3 times, finally dry at 50 DEG C, i.e., Prepare the aerogel carried nickel-phosphorus alloy catalysis material of nanofiber.
Further, the step 4) in, by the step 3) binder solution and the step 2 that prepare) prepare Nanofiber suspension according to volume ratio be 2~5:10 mix homogeneously, prepare nanometer in the presence of emulsification pretreatment machine Fiber mixing suspension, nanofiber mixing suspension is placed in container template, and in being subsequently placed in freezer dryer, freezing is dry Dry, cryogenic temperature is 20 DEG C of 80 DEG C~﹣ of ﹣, and cooling time is 4~6h, and drying time is 24~72h, prepares nanofiber Aeroge.
Further, the step 3) in,
The preparation process of the poly-vinyl alcohol solution is:Polyvinyl alcohol is dissolved in the water, is sufficiently stirred for, obtain quality dense Spend the poly (vinyl alcohol) binder solution for 1.0~2.0%;
The preparation process of the chitosan solution is:It is 50% by mass percent:50% Chitosan powder and acetic acid Mixing, is then added in 25~50 times that quality is Chitosan powder quality of water, is uniformly dispersed, prepares mass concentration For 1.0~2.0% chitosan solution;
The preparation process of the dopamine solution is:Dopamine Hydrochloride powder is dispersed in into the trihydroxy methyl ammonia of pH=8.5 In the buffer solution of methylmethane hydrochlorate, it is sufficiently stirred for, prepares the dopamine solution that mass concentration is 0.2~2.0%.
Further, the step 1) in, the mass percent of thermoplastic polymer and acetylbutyrylcellulose is 5~ 40%:60~95%;The step 2) in, a diameter of 50~350nm of thermoplastic polymer nanofiber's fiber, the organic solvent For the one kind in the tert-butyl alcohol, tert-pentyl alcohol or sec-amyl alcohol, and the volume ratio of organic solvent and water is 1~3:1.
Beneficial effects of the present invention:
1. the thermoplastic polymer nanofiber's fiber aeroge in the present invention is separated, is disperseed suspension modified using melt blending And cryodesiccated method, process is simple, energy-conserving and environment-protective, it is easy to accomplish large-scale production;On the other hand, resulting aeroge Stability Analysis of Structures after thermoplastic nanofibers' fiber solvent resistant and binding agent are crosslinked in material, so that this method is compared obtained by other methods Aerogel material has excellent physics and steady chemical structure, is more widely applied.
2. the load-type nickel phosphorus catalyst of the present invention is with thermoplastic polymer nanofiber's fiber aeroge as carrier, by chemistry By nickel phosphorus nanoparticle deposition in the fiber surface of constitutionally stable aerogel material, carrier has high ratio to the method for deposition Surface area and porosity, make the catalyst have very high catalytic effect, so as to not only solve the made non-loading type of traditional method Catalyst and reactant, the separation problem of product that nickel phosphorus catalyst brings, it is to avoid that what is brought in sewage disposal is secondary Pollute, and greatly improve the catalytic efficiency of the made load-type nickel phosphorus catalyst (film catalyst) of existing method and be difficult to be lifted Problem.
3. the method that the nickel nano fibrous membrane of the present invention adopts whole liquid phase synthesis, it is easy to control the growth of nickel dam, changes The consistency of the thickness, the size of coating granule and coating of nanometer nickel coating;It is easy to by changing reducing agent in nickel bath simultaneously Phosphorus element content in concentration optimization coating, optimizes the electronic structure of nickel alloy, further lifts the catalytic of nickel nano fibrous membrane Energy.
Specific embodiment
In order to preferably explain the present invention, the main contents of the present invention are further elucidated below in conjunction with specific embodiment, but Present disclosure is not limited solely to following examples.
Embodiment 1
This enforcement discloses a kind of preparation method of the aerogel carried nickel-phosphorus alloy catalysis material of nanofiber, including following Step:
1) prepare composite fibre:Will be the polyvinyl alcohol-ethylene copolymer (PVA-co-PE) of 1kg fine with the acetate butyrate of 4kg Dimension plain (CAB) is uniformly mixed, and carries out extruding, pelletize in the double screw extruder that processing temperature is 170 DEG C, obtains PVA- Co-PE/CAB composites;
2) prepare nanofiber suspension:PVA-co-PE/CAB composite Jing melt spinning machines are carried out into drawing-off, is spun Silk, obtains composite fibre;Composite fibre is flowed back in 60 DEG C of acetone 72h extraction acetylbutyrylcelluloses, will extract acetic acid Composite fibre after cellulose butyrate carries out normal temperature drying, prepares the PVA-co-PE Nanowires that average diameter is 200nm Dimension;0.5gPVA-co-PE nanofiber dispersions are taken in the mixed solution of the tert-butyl alcohol of the water and 30ml of 20ml, is sufficiently stirred for point Dissipate and obtain nanofiber suspension;
3) prepare binder solution:0.1g polyvinyl alcohol is taken, is stirred at 80 DEG C and is completely dissolved in the water of 10ml, prepared Obtain the poly (vinyl alcohol) binder solution that mass concentration is 1%;
4) prepare nanofiber aeroge:By the step 3) the poly (vinyl alcohol) binder solution for preparing is added to the step In the rapid nanofiber suspension for 2) preparing, mix homogeneously is placed in container template, freezes 6h at -30 DEG C, is dried 36h, i.e., PVA-co-PE nanofiber aeroges are obtained;
5) configure sensitizing solution:Take 10g stannous chloride (SnCl2), mass concentration is 38% 30ml hydrochloric acid solutions, is added to In 1L deionized waters;
Configuration activating solution:Take 0.25g Palladous chloride. (PdCl2), mass concentration is 38% 20ml hydrochloric acid solutions, is added to 1L In deionized water;
Configuration nickel bath:Bivalent nickel ion (Ni in the nickel bath2+) concentration be 0.07mol/L, sodium hypophosphite (NaH2PO2) Concentration be 16g/L, sodium acetate (CH3COONa concentration) is 18g/L, and the concentration of triton x-100 is 10mg/L, citric acid The concentration of sodium is 8g/L, and the concentration of lactic acid is 10g/L, and the acid-base value of the nickel bath is pH=4.6;
6) prepare the aerogel carried nickel-phosphorus alloy catalysis material of nanofiber:By the step 4) PVA-co-PE for preparing Nanofiber aeroge immerses the step 5) in the sensitizing solution that configures, it is ensured that bath raio is 30:1,3 points of the vibration absorption at 20 DEG C Take out after clock, obtain the nanofiber aeroge being sensitized, then the nanofiber aeroge of sensitization is immersed into the step 5) configuration Activating solution in, it is ensured that bath raio is 30:1, then deionized water cleaning is taken out after absorption being vibrated at 20 DEG C 2 minutes, is obtained The nanofiber aeroge of activation;The nanofiber aeroge of activation is finally immersed in 50 DEG C of the step 5) nickel bath in Reaction, it is ensured that bath raio is 10:1, then oscillating reactionss were taken out after 15 minutes at a constant temperature, respectively deionized water and ethanol rinse 3 times, finally dry at 50 DEG C, obtain the aerogel carried Ni of PVA-co-PE nanofibers2P catalysis materials.
The aerogel carried Ni of PVA-co-PE nanofibers in the present embodiment2The performance parameter of P catalysis materials is shown in Table 1.
Embodiment 2
This enforcement discloses a kind of preparation method of the aerogel carried nickel-phosphorus alloy catalysis material of nanofiber, including following Step:
1) prepare composite fibre:The acetylbutyrylcellulose (CAB) of the polyamide (PA) and 3kg that take 2kg is uniformly mixed Close, carry out extruding in the double screw extruder that processing temperature is 170 DEG C, pelletize, obtain PA/CAB composites;
2) prepare nanofiber suspension:PA/CAB composite Jing melt spinning machines are carried out into drawing-off, spinning is answered Condensating fiber;Composite fibre is flowed back 72 hours in 60 DEG C of acetone and extracts acetylbutyrylcellulose, will be extraction acetate butyrate fine Composite fibre after dimension element carries out normal temperature drying, prepares the PA nanofibers that average diameter is 200nm;Take 0.5gPA nanometers In the mixed solution of the tert-pentyl alcohol of the water and 25ml that are scattered in 25ml of fiber, it is sufficiently stirred for dispersion and obtains nanofiber suspension Liquid;
3) prepare binder solution:0.4g Chitosan powders are taken, stirring under 0.4g acetic acid room temperature is completely dissolved in 20ml's In water, the shitosan binder solution that mass concentration is 2% is prepared;
4) prepare nanofiber aeroge:By the step 3) the shitosan binder solution for preparing is added to the step 2) in the nanofiber suspension for preparing, mix homogeneously is placed in container template, is freezed 4 hours at -50 DEG C, is dried 24 little When, you can obtain PA nanofiber aeroges;
5) configure sensitizing solution:Take 10g stannous chloride (SnCl2), mass concentration is 38% 30ml hydrochloric acid solutions, is added to In 1L deionized waters;
Configuration activating solution:Take 0.25g Palladous chloride. (PdCl2), mass concentration is 38% 20ml hydrochloric acid solutions, is added to 1L In deionized water;
Configuration nickel bath:Bivalent nickel ion (Ni in the nickel bath2+) concentration be 0.12mol/L, sodium hypophosphite (NaH2PO2) Concentration be 40g/L, sodium acetate (CH3COONa concentration) is 20g/L, and the concentration of Tween 80 is 8mg/L, sodium citrate it is dense Spend for 8g/L, the concentration of lactic acid is 12g/L, the acid-base value of the nickel bath is pH=4.5;
6) prepare the aerogel carried nickel-phosphorus alloy catalysis material of nanofiber:By the step 4) the PA nanofibers that prepare Aeroge immerses the step 5) in the sensitizing solution that configures, it is ensured that bath raio is 30:1, take after vibrating absorption 3 minutes at 20 DEG C Go out, obtain the nanofiber aeroge being sensitized, then the nanofiber aeroge of sensitization is immersed into the step 5) activation that configures In liquid, it is ensured that bath raio is 30:1, then deionized water cleaning is taken out after absorption being vibrated at 20 DEG C 2 minutes, obtains what is activated Nanofiber aeroge;The nanofiber aeroge of activation is finally immersed in 50 DEG C of the step 5) nickel bath in react, Ensure that bath raio is 10:1, then take out after oscillating reactionss 15 minutes at a constant temperature, respectively deionized water and ethanol rinse 3 times, It is last to dry at 50 DEG C, obtain the aerogel carried Ni of PA nanofibers3P catalysis materials.
The aerogel carried Ni of PA nanofibers in the present embodiment3The performance parameter of P catalysis materials is shown in Table 1.
Embodiment 3
This enforcement discloses a kind of preparation method of the aerogel carried nickel-phosphorus alloy catalysis material of nanofiber, including following Step:
1) prepare composite fibre:Take the polyethylene terephthalate (PET) of 1kg and the acetylbutyrylcellulose of 5kg (CAB) uniformly mixed, carry out extruding in the double screw extruder that processing temperature is 170 DEG C, pelletize, obtained PA/CAB multiple Condensation material;
2) prepare nanofiber suspension:PA/CAB composite Jing melt spinning machines are carried out into drawing-off, spinning is answered Condensating fiber;Composite fibre is flowed back 72 hours in 60 DEG C of acetone and extracts acetylbutyrylcellulose, will be extraction acetate butyrate fine Composite fibre after dimension element carries out normal temperature drying, prepares the PET nanofibers that average diameter is 100nm;Take 0.5gPET to receive In the mixed solution of the sec-amyl alcohol of the water and 35ml that are scattered in 15ml of rice fiber, it is sufficiently stirred for dispersion and obtains nanofiber suspension Liquid;
3) prepare binder solution:Take the three hydroxyl first that stirring under 0.1g Dopamine Hydrochloride powder room temperature is completely dissolved in 10ml In base aminomethane hydrochloride, the dopamine binder solution that mass concentration is 1% is prepared;
4) prepare nanofiber aeroge:By the step 3) the dopamine binder solution for preparing is added to the step 2) in the nanofiber suspension for preparing, mix homogeneously is placed in container template, is freezed 6 hours at -20 DEG C, is dried 72 little When, you can obtain PET nanofiber aeroges;
5) configure sensitizing solution:Take 10g stannous chloride (SnCl2), mass concentration is 38% 30ml hydrochloric acid solutions, is added to In 1L deionized waters;
Configuration activating solution:Take 0.25g Palladous chloride. (PdCl2), mass concentration is 38% 20ml hydrochloric acid solutions, is added to 1L In deionized water;
Configuration nickel bath:Bivalent nickel ion (Ni in the nickel bath2+) concentration be 0.10mol/L, sodium hypophosphite (NaH2PO2) Concentration be 30g/L, sodium acetate (CH3COONa concentration) is 18g/L, and the concentration of Tween 80 is 7mg/L, sodium citrate it is dense Spend for 8g/L, the concentration of lactic acid is 11g/L, the acid-base value of the nickel bath is pH=4.7;
6) prepare the aerogel carried nickel-phosphorus alloy catalysis material of nanofiber:By the step 4) the PA nanofibers that prepare Aeroge immerses the step 5) in the sensitizing solution that configures, it is ensured that bath raio is 30:1, take after vibrating absorption 3 minutes at 20 DEG C Go out, obtain the nanofiber aeroge being sensitized, then the nanofiber aeroge of sensitization is immersed into the step 5) activation that configures In liquid, it is ensured that bath raio is 30:1, then deionized water cleaning is taken out after absorption being vibrated at 20 DEG C 2 minutes, obtains what is activated Nanofiber aeroge;The nanofiber aeroge of activation is finally immersed in 50 DEG C of the step 5) nickel bath in react, Ensure that bath raio is 10:1, then take out after oscillating reactionss 15 minutes at a constant temperature, respectively deionized water and ethanol rinse 3 times, It is last to dry at 50 DEG C, obtain the aerogel carried Ni of PA nanofibers2P5Catalysis material.
Embodiment 4
This enforcement discloses a kind of preparation method of the aerogel carried nickel-phosphorus alloy catalysis material of nanofiber, including following Step:
1) prepare composite fibre:Take the polyvinyl alcohol-ethylene copolymer (PVA-co-PE) of 1kg and the acetate butyrate of 4.5kg Cellulose (CAB) is uniformly mixed, and carries out extruding, pelletize in the double screw extruder that processing temperature is 170 DEG C, is obtained PVA-co-PE/CAB composites;
2) prepare nanofiber suspension:PA/CAB composite Jing melt spinning machines are carried out into drawing-off, spinning is answered Condensating fiber;Composite fibre is flowed back 72 hours in 60 DEG C of acetone and extracts acetylbutyrylcellulose, will be extraction acetate butyrate fine Composite fibre after dimension element carries out normal temperature drying, prepares the PVA-co-PE nanofibers that average diameter is 100nm;Take In the mixed solution of the tert-butyl alcohol of the water and 30ml that are scattered in 20ml of 0.5g PVA-co-PE nanofibers, dispersion is sufficiently stirred for Obtain nanofiber suspension;
3) prepare binder solution:0.2g polyvinyl alcohol is taken, is stirred at 80 DEG C and is completely dissolved in the water of 10ml, prepared Obtain the poly (vinyl alcohol) binder solution that mass concentration is 2%;
4) prepare nanofiber aeroge:By the step 3) the poly (vinyl alcohol) binder solution for preparing is added to the step In the rapid nanofiber suspension for 2) preparing, mix homogeneously is placed in container template, is freezed 7 hours at -80 DEG C, is dried 36 Hour, you can obtain PVA-co-PE nanofiber aeroges;
5) configure sensitizing solution:Take 10g stannous chloride (SnCl2), mass concentration is 38% 30ml hydrochloric acid solutions, is added to In 1L deionized waters;
Configuration activating solution:Take 0.25g Palladous chloride. (PdCl2), mass concentration is 38% 20ml hydrochloric acid solutions, is added to 1L In deionized water;
Configuration nickel bath:Bivalent nickel ion (Ni in the nickel bath2+) concentration be 0.12mol/L, sodium hypophosphite (NaH2PO2) Concentration be 30g/L, sodium acetate (CH3COONa concentration) is 19g/L, and the concentration of TritonX X is 100 8mg/L, sodium citrate Concentration be 10g/L, the concentration of lactic acid is 11g/L, and the acid-base value of the nickel bath is pH=5.0;
6) prepare the aerogel carried nickel-phosphorus alloy catalysis material of nanofiber:By the step 4) the PA nanofibers that prepare Aeroge immerses the step 5) in the sensitizing solution that configures, it is ensured that bath raio is 30:1, take after vibrating absorption 3 minutes at 20 DEG C Go out, obtain the nanofiber aeroge being sensitized, then the nanofiber aeroge of sensitization is immersed into the step 5) activation that configures In liquid, it is ensured that bath raio is 30:1, then deionized water cleaning is taken out after absorption being vibrated at 20 DEG C 2 minutes, obtains what is activated Nanofiber aeroge;The nanofiber aeroge of activation is finally immersed in 50 DEG C of the step 5) nickel bath in react, Ensure that bath raio is 10:1, then take out after oscillating reactionss 15 minutes at a constant temperature, respectively deionized water and ethanol rinse 3 times, It is last to dry at 50 DEG C, obtain the aerogel carried Ni of PVA-co-PE nanofibers3P catalysis materials.
The aerogel carried Ni of PVA-co-PE nanofibers in the present embodiment3The performance parameter of P catalysis materials is shown in Table 1.
In order to the aerogel carried nickel-phosphorus alloy catalysis material of nanofiber for illustrating present invention preparation has preferable performance, It is further explained with reference to relevant comparative's example.
With reference to table 1, comparative example 1 and the respectively Chinese invention patent application of comparative example 2:Embodiment in CN105148996A 1 and embodiment 4.In embodiments of the invention 1-4 and comparative example, the catalytic performance test process of catalysis material is as follows:By 3mg's Catalysis material is placed in containing 3mL, adsorbs 20min, then in the quartz colorimetric utensil of paranitrophenol (PNP) aqueous solution of 0.5mM 0.3ml, the sodium borohydride aqueous solution of 1M are injected in this cuvette, test mixing solution is to the absorption intensity of ultraviolet light with the time Variation tendency, catalysis material is calculated to the catalysis of paranitrophenol reduction reaction speed by the light intensity for contrasting different time Rate.The experimental result of embodiments of the invention and comparative example such as table 1.
The porosity and catalytic performance of 1 embodiment of table and comparative example
Understand that with reference to table 1 the aerogel carried nickel-phosphorus alloy catalysis material of nanofiber prepared by the present invention is received due to having Rice network of fibers framing structure, porosity are higher, and nickel catalyst carried with Nanofiber Network skeleton as carrier, are deposited on The fiber surface of constitutionally stable aerogel material, makes the catalyst have very high catalytic effect.

Claims (10)

1. the aerogel carried nickel-phosphorus alloy catalysis material of a kind of nanofiber, it is characterised in that:Catalysis material is by nanometer fiber net Network skeleton and bag are attached to the nickel-phosphorus alloy nano-particle composition on Nanofiber Network skeleton surface, the Nanofiber Network skeleton It is made up of nanofiber and the binding agent for being attached to nanofiber surface, the nanofiber is made up of thermoplastic polymer.
2. the aerogel carried nickel-phosphorus alloy catalysis material of nanofiber according to claim 1, it is characterised in that:It is described to receive Rice network of fibers skeleton with the mass percent of nickel-phosphorus alloy nano-particle be:50~75%:25~50%, the nanofiber Mass percent with binding agent is:50~80%:20~50%.
3. the aerogel carried nickel-phosphorus alloy catalysis material of nanofiber according to claim 1 and 2, it is characterised in that:Institute The atom number percentage ratio for stating nickel and phosphorus in nickel-phosphorus alloy nano-particle is:50~80%:20~50%, and nickel-phosphorus alloy nanometer The particle diameter of granule is 1~50nm.
4. the aerogel carried nickel-phosphorus alloy catalysis material of nanofiber according to claim 1 and 2, it is characterised in that:Institute Binding agent is stated for the one kind in polyvinyl alcohol, shitosan or poly-dopamine;The thermoplastic polymer is common for polyvinyl alcohol-ethylene Polymers, polypropylene, polyamide, polyethylene terephthalate, PTT, poly terephthalic acid fourth two One kind in alcohol ester or polyurethane.
5. the preparation method of the aerogel carried nickel-phosphorus alloy catalysis material of a kind of nanofiber, it is characterised in that:Including following step Suddenly:
1) prepare composite fibre:Thermoplastic polymer is uniformly mixed with acetylbutyrylcellulose, Jing double screw extruders extrusion, Pelletize, prepares thermoplastic polymer/acetylbutyrylcellulose composite, continues thermoplastic polymer/acetate butyrate fiber Plain composite Jing melt spinning machines carry out drawing-off, spinning, obtain composite fibre;
2) prepare nanofiber suspension:By the step 1) composite fibre for preparing is placed in acetone and flows back, extract Normal temperature drying is carried out after acetylbutyrylcellulose, thermoplastic polymer nanofiber's fiber is prepared, then by thermoplastic polymer Nanofiber is scattered in mixed solution of the organic solvent with water by the concentration of 1~10g/L, prepares finely dispersed nanometer Fibrous suspension;
3) prepare binder solution:Binder solution is the one kind in poly-vinyl alcohol solution, chitosan solution or dopamine solution, The poly-vinyl alcohol solution is that polyvinyl alcohol is dissolved in the water to prepare;The chitosan solution is by Chitosan powder point Dissipate and prepare in water;The dopamine solution is that Dopamine Hydrochloride powder is scattered in Tri(Hydroxymethyl) Amino Methane Hydrochloride Buffer solution prepare;
4) prepare nanofiber aeroge:By the step 3) binder solution and the step 2 that prepare) Nanowire for preparing Dimension suspension mix homogeneously, prepares nanofiber mixing suspension, nanofiber mixing suspension is placed in container template In, lyophilization in freezer dryer is then placed in again, prepares nanofiber aeroge;
5) configure the bath of nickel nano fibrous membrane sensitizing solution, activating solution and nickel;
6) prepare the aerogel carried nickel-phosphorus alloy catalysis material of nanofiber:By the step 4) the nanofiber aeroge for preparing Immerse the step 5) in the nickel nano fibrous membrane sensitizing solution for preparing vibration absorption obtain the nanofiber aeroge being sensitized, continue The nanofiber aeroge of sensitization is immersed into the step 5) in the activating solution for preparing, vibration absorption obtains the nanofiber for activating The nanofiber aeroge of activation is immersed oscillating reactionss in nickel bath, then deionized water and ethanol rinse, then is dried by aeroge It is dry, that is, prepare the aerogel carried nickel-phosphorus alloy catalysis material of nanofiber.
6. the preparation method of the aerogel carried nickel-phosphorus alloy catalysis material of nanofiber according to claim 5, its feature It is:The step 5) in,
Configuration nickel nano fibrous membrane sensitizing solution:10g stannous chlorides are taken, mass concentration is 38% 30ml hydrochloric acid solutions, is added to In 1L deionized waters;
Configuration activating solution:0.25g Palladous chloride .s are taken, mass concentration is 38% 20ml hydrochloric acid solutions, is added in 1L deionized waters;
Configuration nickel bath:In nickel bath, the molar concentration of bivalent nickel ion is 0.07~0.12mol/L, and the quality of sodium hypophosphite is dense Spend for 16~40g/L, the mass concentration of sodium acetate is 15~20g/L, the mass concentration of triton x-100 be 5~10mg/L or The mass concentration of Tween 80 is 5~10mg/L, and the mass concentration of sodium citrate is 8~10g/L, the mass concentration of lactic acid is 10~ 12g/L, the acid-base value of the nickel bath is pH=4.5~5.0.
7. the preparation method of the aerogel carried nickel-phosphorus alloy catalysis material of nanofiber according to claim 5 or 6, which is special Levy and be:The step 6) in, by the step 4) the nanofiber aeroge for preparing immerses the step 5) nanometer for preparing In fibrous membrane sensitizing solution, it is ensured that bath raio is 30:1, taking out after vibration 1~5min of absorption at 15~25 DEG C, obtaining receiving for sensitization Rice fiber aeroge, continue will the nanofiber aeroge of sensitization immerse the step 5) in the activating solution for preparing, it is ensured that bath raio For 30:1, then deionized water cleaning is being taken out after vibration 1~5min of absorption at 15~25 DEG C, is obtaining the Nanowire for activating Dimension aeroge;To react in the nanofiber aeroge immersion nickel bath of activation, it is ensured that bath raio is 10:1, then vibrate at a constant temperature Take out after 10~20min of reaction, respectively deionized water and ethanol rinse 3 times, finally dry at 50 DEG C, that is, prepare and receive The aerogel carried nickel-phosphorus alloy catalysis material of rice fiber.
8. the preparation method of the aerogel carried nickel-phosphorus alloy catalysis material of nanofiber according to claim 5, its feature It is:The step 4) in, by the step 3) binder solution and the step 2 that prepare) nanofiber for preparing suspends Liquid is 2~5 according to volume ratio:10 mix homogeneously, prepare nanofiber mixing suspension in the presence of emulsification pretreatment machine, Nanofiber mixing suspension is placed in container template, lyophilization in freezer dryer is subsequently placed in, cryogenic temperature is ﹣ 80 DEG C~20 DEG C of ﹣, cooling time is 4~6h, and drying time is 24~72h, prepares nanofiber aeroge.
9. the preparation method of the aerogel carried nickel-phosphorus alloy catalysis material of nanofiber according to claim 5, its feature It is:The step 3) in,
The preparation process of the poly-vinyl alcohol solution is:Polyvinyl alcohol is dissolved in the water, is sufficiently stirred for, obtaining mass concentration is 1.0~2.0% poly (vinyl alcohol) binder solution;
The preparation process of the chitosan solution is:It is 50% by mass percent:50% Chitosan powder is mixed with acetic acid, Be then added in 25~50 times that quality is Chitosan powder quality of water, be uniformly dispersed, mass concentration is prepared for 1.0 ~2.0% chitosan solution;
The preparation process of the dopamine solution is:Dopamine Hydrochloride powder is dispersed in into the trihydroxy methyl amino first of pH=8.5 In the buffer solution of heptane hydrochloride salt, it is sufficiently stirred for, prepares the dopamine solution that mass concentration is 0.2~2.0%.
10. the preparation method of the aerogel carried nickel-phosphorus alloy catalysis material of nanofiber according to claim 5, its feature It is:The step 1) in, thermoplastic polymer is 5~40% with the mass percent of acetylbutyrylcellulose:60~95%; The step 2) in, a diameter of 50~350nm of thermoplastic polymer nanofiber's fiber, the organic solvent are the tert-butyl alcohol, uncle penta One kind in alcohol or sec-amyl alcohol, and the volume ratio of organic solvent and water is 1~3:1.
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