CN116474747B - Lanthanum-loaded iron carbon nanotube composite molecular sieve film and preparation method and application thereof - Google Patents
Lanthanum-loaded iron carbon nanotube composite molecular sieve film and preparation method and application thereof Download PDFInfo
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- 239000002808 molecular sieve Substances 0.000 title claims abstract description 71
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 239000002041 carbon nanotube Substances 0.000 title claims abstract description 62
- 229910021393 carbon nanotube Inorganic materials 0.000 title claims abstract description 62
- 239000002131 composite material Substances 0.000 title claims abstract description 50
- 229910052746 lanthanum Inorganic materials 0.000 title claims abstract description 41
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 title claims abstract description 41
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000001179 sorption measurement Methods 0.000 claims abstract description 34
- 239000002238 carbon nanotube film Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 20
- NNLJGFCRHBKPPJ-UHFFFAOYSA-N iron lanthanum Chemical compound [Fe].[La] NNLJGFCRHBKPPJ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000002791 soaking Methods 0.000 claims abstract description 7
- 238000000967 suction filtration Methods 0.000 claims abstract description 5
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 3
- 238000011065 in-situ storage Methods 0.000 claims abstract description 3
- 239000000243 solution Substances 0.000 claims description 57
- 238000006243 chemical reaction Methods 0.000 claims description 46
- 239000012528 membrane Substances 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 238000001035 drying Methods 0.000 claims description 22
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 16
- 238000005406 washing Methods 0.000 claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 239000011259 mixed solution Substances 0.000 claims description 14
- 229910019142 PO4 Inorganic materials 0.000 claims description 13
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 13
- 239000010452 phosphate Substances 0.000 claims description 13
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 claims description 12
- 230000010355 oscillation Effects 0.000 claims description 12
- 239000003513 alkali Substances 0.000 claims description 8
- 239000008367 deionised water Substances 0.000 claims description 8
- 229910021641 deionized water Inorganic materials 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 6
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 6
- 239000012295 chemical reaction liquid Substances 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 239000000020 Nitrocellulose Substances 0.000 claims description 5
- 239000002048 multi walled nanotube Substances 0.000 claims description 5
- 229920001220 nitrocellulos Polymers 0.000 claims description 5
- 238000009210 therapy by ultrasound Methods 0.000 claims description 5
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- FYDKNKUEBJQCCN-UHFFFAOYSA-N lanthanum(3+);trinitrate Chemical compound [La+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O FYDKNKUEBJQCCN-UHFFFAOYSA-N 0.000 claims description 3
- ZPIRTVJRHUMMOI-UHFFFAOYSA-N octoxybenzene Chemical compound CCCCCCCCOC1=CC=CC=C1 ZPIRTVJRHUMMOI-UHFFFAOYSA-N 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 239000006185 dispersion Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 238000012986 modification Methods 0.000 claims description 2
- 230000004048 modification Effects 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 239000002109 single walled nanotube Substances 0.000 claims description 2
- 238000009827 uniform distribution Methods 0.000 claims description 2
- 238000000746 purification Methods 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 abstract description 3
- 239000011148 porous material Substances 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 3
- 230000008929 regeneration Effects 0.000 abstract description 3
- 238000011069 regeneration method Methods 0.000 abstract description 3
- 239000003463 adsorbent Substances 0.000 description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 9
- 239000011574 phosphorus Substances 0.000 description 9
- 229910052698 phosphorus Inorganic materials 0.000 description 9
- 239000007787 solid Substances 0.000 description 9
- 238000003756 stirring Methods 0.000 description 6
- 238000005303 weighing Methods 0.000 description 6
- 238000012851 eutrophication Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000011734 sodium Substances 0.000 description 5
- 239000002351 wastewater Substances 0.000 description 5
- 150000002505 iron Chemical class 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000002378 acidificating effect Effects 0.000 description 3
- -1 and today Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- GJKFIJKSBFYMQK-UHFFFAOYSA-N lanthanum(3+);trinitrate;hexahydrate Chemical compound O.O.O.O.O.O.[La+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O GJKFIJKSBFYMQK-UHFFFAOYSA-N 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 150000002601 lanthanoid compounds Chemical class 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical group [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 229920004890 Triton X-100 Polymers 0.000 description 1
- 239000013504 Triton X-100 Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000005791 algae growth Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000020774 essential nutrients Nutrition 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 150000002506 iron compounds Chemical class 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3078—Thermal treatment, e.g. calcining or pyrolizing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/0207—Compounds of Sc, Y or Lanthanides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/0225—Compounds of Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt
- B01J20/0229—Compounds of Fe
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
- B01J20/205—Carbon nanostructures, e.g. nanotubes, nanohorns, nanocones, nanoballs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28011—Other properties, e.g. density, crush strength
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
- B01J20/28057—Surface area, e.g. B.E.T specific surface area
- B01J20/28061—Surface area, e.g. B.E.T specific surface area being in the range 100-500 m2/g
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
Abstract
The invention provides a lanthanum-loaded iron carbon nanotube composite molecular sieve film and a preparation method and application thereof, belonging to the technical field of composite materials. According to the preparation method provided by the invention, the carbon nano tube is modified by a wet soaking method and then subjected to suction filtration to obtain a carbon nano tube film, the molecular sieve film is obtained by an in-situ hydrothermal synthesis method, and then the lanthanum-iron compound is loaded on the molecular sieve film to obtain the lanthanum-iron-carrying carbon nano tube composite molecular sieve film. The preparation method provided by the invention has strong operability, the prepared film has larger specific surface area, uniform pore structure, good thermal stability and mechanical stability, and meanwhile, the film has excellent adsorption performance, strong adsorption selectivity and high recovery and regeneration efficiency, and is an environment restoration agent with great potential.
Description
Technical Field
The invention relates to the technical field of composite materials, in particular to a lanthanum-loaded iron carbon nanotube composite molecular sieve film and a preparation method and application thereof.
Background
With the continuous development of modern society, the phosphorus-containing wastewater discharged by industry and families is increased, and the pollution of the phosphorus-containing wastewater becomes one of the key environmental problems to be solved urgently. Phosphate is a key factor in the eutrophication of water as an essential nutrient for algae growth. However, eutrophication of water mainly occurs in fresh water, and today, fresh water resources are scarce, and water quality deterioration caused by eutrophication aggravates water supply shortage of residents, and even affects social production and human health. Therefore, how to efficiently and economically repair the phosphorus polluted water body, avoid the eutrophication phenomenon, and protect the ecological environment is a problem that people are not helped at present.
Among the various techniques for removing phosphate from wastewater, adsorption is a cost effective method. Wherein the choice of both adsorbent and support is a critical factor. The lanthanide compound has good combination with phosphate, high adsorption capacity, high adsorption rate, high adsorption selectivity, no toxicity and environmental friendliness, and is an important environmental remediation agent for remediating phosphorus polluted water and avoiding eutrophication. However, most lanthanum-based materials are in a powder state, have too small particle size, are easy to agglomerate, are difficult to recycle after the adsorption dephosphorization process, and obviously improve the treatment cost of the phosphorus-containing wastewater, so that the phosphorus-containing wastewater is difficult to apply in large scale. Ferric salt as an adsorbent has been widely used in modern wastewater treatment, and has higher cost performance as an adsorbent with efficient adsorption performance on phosphate, and the cost is far lower than that of lanthanide compounds. However, the iron salt is difficult to recover after adsorption, and if the iron salt is directly discharged into the environment, the water quality is polluted, and the iron salt is easy to corrode drainage facilities, instruments and meters and the like, so that the iron salt is limited to be practically used to a certain extent. Lanthanum and iron are mixed for use, lanthanum can be used for reducing iron leaching, the cost of the adsorbent can be reduced, and the excellent performance of the lanthanum and the iron in adsorption can be fully exerted, however, lanthanum and iron compounds have the problems of easy agglomeration and difficult recovery, which greatly limits the practical application of the two adsorbents with excellent performance.
Carbon nanotubes are a commonly used adsorbent carrier, which is a material with hollow interior, numerous pores and large specific surface area. The problem group of Yang found that there was a strong correlation between transition metal and carbon atoms on the surface of metal-supported carbon nanotubes, and that this correlation could well improve the adsorption properties of the catalyst. Therefore, carbon nanotubes can have strong interactions with contaminant molecules during the adsorption process, and are therefore widely used as an adsorbent material for removing various impurities in gaseous contaminants and aqueous solutions, and are a carrier material with excellent performance. Gu et al prepared zirconium-modified carbon nanotubes and applied to phosphate adsorption. Although the zirconium modified carbon nano-tube has good adsorption performance, the problem that the powdery adsorbent is easy to agglomerate and difficult to recycle limits the application of the zirconium modified carbon nano-tube.
Therefore, there is a need for an adsorbent which is easy to recycle and has high adsorption efficiency for efficiently and economically repairing phosphorus-polluted water bodies.
Disclosure of Invention
In view of the above, the invention aims to provide a lanthanum-iron-carrying carbon nanotube composite molecular sieve film, and a preparation method and application thereof.
In order to achieve the above object, the present invention provides the following technical solutions: the preparation method of the lanthanum-iron-carrying carbon nanotube composite molecular sieve film comprises the steps of modifying carbon nanotubes by a wet soaking method, performing suction filtration to obtain the carbon nanotube film, obtaining the molecular sieve film by an in-situ hydrothermal synthesis method, and finally loading lanthanum-iron compound on the molecular sieve film to obtain the lanthanum-iron-carrying carbon nanotube composite molecular sieve film.
Preferably, the preparation method specifically comprises the following steps:
1) Adding carbon nano tubes into an organic solution, and performing ultrasonic treatment to obtain carbon nano tube dispersion liquid with uniform distribution concentration of 0.01 g/L-0.05 g/L as a first reaction liquid;
2) Carrying out suction filtration on the first reaction liquid to obtain a carbon nanotube film adhered on filter paper, transferring the film into acetone for soaking until the filter paper is dissolved, and washing and drying to obtain the carbon nanotube film;
3) Preparing FAU molecular sieve membrane synthetic solution, transferring the FAU molecular sieve membrane synthetic solution into a reaction kettle, adding the carbon nanotube film for reaction, cooling the reaction kettle after the reaction is finished, taking out the film, washing and drying to obtain the carbon nanotube composite FAU molecular sieve film;
4) Immersing the carbon nano tube composite FAU type molecular sieve film into lanthanum-iron mixed solution, and carrying out constant-temperature oscillation reaction to obtain a second reaction solution;
5) And adding alkali liquor into the second reaction solution, carrying out constant-temperature oscillation reaction, taking out the film after the reaction is finished, washing, and drying to obtain the lanthanum-iron-loaded carbon nano tube composite molecular sieve film material.
Further preferably, in step 1), the carbon nanotubes are single-walled carbon nanotubes or multi-walled carbon nanotubes; the organic solution is polyethylene glycol octyl phenyl ether (TritonX-100) solution; the concentration of the TritonX-100 is 0.5wt percent to 5wt percent; the ultrasonic time is 20-60 min.
Further preferably, the filter paper in step 2) is a nitrocellulose membrane; the soaking time is 20-40 min; the drying temperature is 80-100 ℃ and the drying time is 10-20 h.
Further preferably, step 3) the FAU molecular sieve membrane synthesis solution is prepared according to Na 2 O:Al 2 O 3 :SiO 2 :H 2 The molar ratio of O is (60-80): 1 (10-30): 1000-3000.
Further preferably, the preparation method of the FAU molecular sieve membrane synthetic solution comprises the following steps: according to Na 2 O:Al 2 O 3 :SiO 2 :H 2 The mol ratio of O is (60-80) 1 (10-30) that (1000-3000) the raw materials are prepared, and the magnetic stirrer is used for stirring at constant temperature until the solution is clear and transparent; the stirring temperature is 20-30 ℃, and the stirring time is 1-3 h.
Further preferably, the reaction temperature in the step 3) is 60-90 ℃ and the reaction time is 12-48 hours; the washing is to wash with deionized water to ph=7; the drying temperature is 100-120 ℃, and the drying time is 8-16 h.
Further preferably, the lanthanum-iron mixed solution in the step 4) is a mixed solution of lanthanum nitrate and ferric nitrate; the mole ratio of lanthanum to iron in the mixed solution is (1-2): 1; the mass ratio of the total mass of lanthanum and iron elements to the carbon nano tube is (0.3-1): 1, a step of; the temperature of the constant-temperature oscillation reaction is 20-30 ℃, and the oscillation time is 2-8 h.
Further preferably, the lanthanum nitrate concentration is 0.005mol/L to 0.01mol/L; the concentration of the ferric nitrate is 0.005 mol/L-0.01 mol/L.
Further preferably, the concentration of the alkali liquor in the step 5) is 0.5-2 mol/L; the addition amount of the alkali liquor is that the concentration of the alkali in the second reaction liquid is 0.1mol/L; the oscillation speed is 150 rpm-250 rpm, and the oscillation time is 20 min-40 min; the drying temperature is 100-120 ℃ and the drying time is 8-16 h.
Further preferably, the alkali liquor is potassium hydroxide solution, sodium hydroxide solution or calcium hydroxide solution.
The invention also provides the lanthanum-loaded iron carbon nanotube composite molecular sieve film prepared by the preparation method.
The invention also provides a method for removing phosphate in water, which comprises the steps of placing the lanthanum-loaded iron carbon nano tube composite molecular sieve film into a polluted water body, purifying the water body in a multi-gradient pool, and recovering and recycling the lanthanum-loaded iron carbon nano tube composite molecular sieve film after adsorbing for a period of time.
The beneficial technical effects are as follows:
1. the lanthanum-iron-carrying carbon nanotube composite molecular sieve film provided by the invention can exert the excellent adsorption efficiency of the lanthanum-iron double adsorbent, has higher adsorption capacity than that of a single adsorbent, and improves the repair efficiency of the environment repair agent. Meanwhile, the film shape can reduce the difficulty of the separation process after use, is beneficial to reducing the operation cost, improves the recovery efficiency while increasing the adsorption performance, and reduces the loss of lanthanum-iron compounds.
2. According to the invention, the molecular sieve film is synthesized on the carbon nanotube film, and the carbon nanotube is used as a substrate to synthesize the compact molecular sieve film, so that the problem of lower mechanical strength of the carbon nanotube film can be avoided, the stability of the adsorbent is enhanced, and the adsorption efficiency can be further improved by utilizing the advantages of abundant pores and large specific surface area of the molecular sieve film.
3. The specific surface area of the lanthanum-loaded iron carbon nano tube composite molecular sieve film provided by the invention is 300-500m 2 The large specific surface area indicates a rich porosity.
4. The molecular sieve film provided by the invention can be kept stable under the air atmosphere of below 350 ℃.
5. The lanthanum-loaded iron carbon nanotube composite molecular sieve film provided by the invention is used as a renewable material, the adsorption efficiency after regeneration is high, the regeneration flow is easy to operate, the time cost is greatly saved, the service life of the adsorbent is prolonged, and the economic benefit is improved.
Drawings
FIG. 1 is a diagram of a lanthanum-loaded iron carbon nanotube composite molecular sieve film;
FIG. 2 is a graph showing the thin cycle performance of the lanthanum loaded iron carbon nanotube composite molecular sieve.
Detailed Description
For a better understanding of the present invention, the following examples are further illustrated, but are not limited to the following examples. All the starting materials and solvents used in the examples are commercially available products.
Preparation of 1wt% TritonX-100 solution: 10g TritonX-100 was weighed out and dissolved in 1000mL of water. The 1wt% Triton X-100 solution was used in the examples below.
Example 1
A preparation method of a lanthanum-loaded iron carbon nanotube composite molecular sieve film comprises the following steps:
(1) Weighing 0.02g of multi-wall carbon nano tube, adding 1L of TritonX-100 solution, and performing ultrasonic treatment for 30min to obtain a first reaction solution;
(2) Filtering the first reaction solution through a nitrocellulose membrane to form a membrane, putting the obtained membrane into a surface dish, dripping acetone, slightly oscillating to remove the acetone, and repeating the process until the surface of the membrane is not attached in white during drying to obtain a carbon nanotube film;
(3) Preparation of FAU molecular sieve membrane synthetic solution: according to Na 2 O:Al 2 O 3 :SiO 2 :H 2 The molar ratio of O is 70:1:20:2000 to prepare 200mL solution, and the solution is stirred for 2h at 25 ℃ by using a magnetic stirrer to be clear and transparent;
(4) Preparing a carbon nano tube composite FAU type molecular sieve film: transferring 200mL of FAU molecular sieve membrane synthetic solution to a reaction kettle, adding 0.02g of carbon nanotube film, reacting at 75 ℃ for 24 hours, washing with deionized water to pH=7 after the reaction is finished, and drying at 100 ℃ for 12 hours;
(5) Weighing 0.866g (0.002 mol) of lanthanum nitrate hexahydrate solid and 0.242g (0.001 mol) of ferric nitrate solid, dissolving in 200mL of deionized water, stirring with a glass rod until the solid is completely dissolved to obtain a lanthanum-iron mixed solution, immersing a carbon nanotube composite FAU type molecular sieve film in the lanthanum-iron mixed solution, and oscillating for 4 hours in a constant-temperature oscillator at 25 ℃ and 200rpm to obtain a second reaction solution;
(6) 50mL of 0.5mol/L NaOH solution is added into the second reaction solution, the reaction is carried out for 30min by shaking in a constant-temperature oscillator at 25 ℃ and 200rpm, the film is taken out for washing after the reaction is finished, and the film is dried for 12h at 80 ℃ to obtain the lanthanum-loaded iron carbon nanotube composite molecular sieve film.
Example 2
A preparation method of a lanthanum-loaded iron carbon nanotube composite molecular sieve film comprises the following steps:
(1) Weighing 0.02g of multi-wall carbon nano tube, adding 1L of TritonX-100 solution, and performing ultrasonic treatment for 30min to obtain a first reaction solution;
(2) Filtering the first reaction solution through a nitrocellulose membrane to form a membrane, putting the obtained membrane into a surface dish, dripping acetone, slightly oscillating to remove the acetone, and repeating the process until the surface of the membrane is not attached in white during drying to obtain a carbon nanotube film;
(3) Preparation of FAU molecular sieve membrane synthetic solution: according to Na 2 O:Al 2 O 3 :SiO 2 :H 2 The molar ratio of O is 60:1:30:2000, 200mL of solution is prepared, and the solution is stirred for 2 hours at 25 ℃ by using a magnetic stirrer until the solution is clear and transparent;
(4) Preparing a carbon nano tube composite FAU type molecular sieve film: transferring 200ml of FAU molecular sieve membrane synthetic solution to a reaction kettle, adding 0.02g of carbon nanotube film, reacting at 75 ℃ for 24 hours, washing with deionized water to pH=7 after the reaction is finished, and drying at 100 ℃ for 12 hours;
(5) Weighing 0.866g (0.002 mol) of lanthanum nitrate hexahydrate solid and 0.242g (0.001 mol) of ferric nitrate solid, dissolving in 200mL of deionized water, stirring with a glass rod until the solid is completely dissolved to obtain a lanthanum-iron mixed solution, immersing a carbon nanotube composite FAU type molecular sieve film in the lanthanum-iron mixed solution, and oscillating for 4 hours in a constant-temperature oscillator at 25 ℃ and 200rpm to obtain a second reaction solution;
(6) 50mL of 0.5mol/L NaOH solution is added into the second reaction solution, the reaction is carried out for 30min by shaking in a constant-temperature oscillator at 25 ℃ and 200rpm, the film is taken out for washing after the reaction is finished, and the film is dried for 12h at 80 ℃ to obtain the lanthanum-loaded iron carbon nanotube composite molecular sieve film.
Example 3
A preparation method of a lanthanum-loaded iron carbon nanotube composite molecular sieve film comprises the following steps:
(1) Weighing 0.02g of multi-wall carbon nano tube, adding 1L of TritonX-100 solution, and performing ultrasonic treatment for 30min to obtain a first reaction solution;
(2) Filtering the first reaction solution through a nitrocellulose membrane to form a membrane, putting the obtained membrane into a surface dish, dripping acetone, slightly oscillating to remove the acetone, and repeating the process until the surface of the membrane is not attached in white during drying to obtain a carbon nanotube film;
(3) Preparation of FAU molecular sieve membrane synthetic solution: according to Na 2 O:Al 2 O 3 :SiO 2 :H 2 The molar ratio of O is 70:1:25:2000 to prepare 200mL solution, and the solution is stirred for 2h at 25 ℃ by using a magnetic stirrer to be clear and transparent;
(4) Preparing a carbon nano tube composite FAU type molecular sieve film: transferring 200mL of FAU molecular sieve membrane synthetic solution to a reaction kettle, adding 0.02g of carbon nanotube film, reacting at 75 ℃ for 24 hours, washing with deionized water to pH=7 after the reaction is finished, and drying at 100 ℃ for 12 hours;
(5) Weighing 0.866g (0.002 mol) of lanthanum nitrate hexahydrate solid and 0.242g (0.001 mol) of ferric nitrate solid, dissolving in 200mL of deionized water, stirring with a glass rod until the solid is completely dissolved to obtain a lanthanum-iron mixed solution, immersing a carbon nanotube composite FAU type molecular sieve film in the lanthanum-iron mixed solution, and oscillating for 4 hours in a constant-temperature oscillator at 25 ℃ and 200rpm to obtain a second reaction solution;
(6) Preparing a lanthanum-loaded iron carbon nano tube composite molecular sieve film: 50mL of 0.5mol/L NaOH solution is added into the second reaction solution, the reaction is carried out for 30min by shaking in a constant-temperature oscillator at 25 ℃ and 200rpm, the film is taken out for washing after the reaction is finished, and the film is dried for 12h at 80 ℃ to obtain the lanthanum-loaded iron carbon nanotube composite molecular sieve film.
Test example 1
Performance test of lanthanum-loaded iron carbon nanotube composite molecular sieve film obtained in example 1:
1.1 the lanthanum-loaded iron carbon nanotube composite molecular sieve film prepared in example 1 was placed in 100mL of phosphate solution at a concentration of 0.2g/L, and the initial pH was adjusted to perform a phosphate adsorption experiment, followed by adsorption for 6 hours. The result shows that the lanthanum-loaded iron carbon nanotube film has good adsorption performance under the acidic condition, and the adsorption capacity of the adsorbent is 50mg/g under the condition that the phosphorus concentration of a substrate is 150 mg-P/L.
1.2 the lanthanum-loaded iron carbon nanotube composite molecular sieve film prepared in example 1 is subjected to cycle number test, and as can be seen from fig. 2, the composite molecular sieve film prepared in the invention has higher adsorption capacity after multiple cycles and can be recycled.
Test example 2
Performance test of lanthanum-loaded iron carbon nanotube composite molecular sieve film obtained in example 2:
the lanthanum-loaded iron carbon nanotube composite molecular sieve film prepared in example 2 is placed in 100mL of phosphate solution at a concentration of 0.2g/L, and the initial pH is adjusted to perform a phosphate adsorption experiment, and the adsorption is performed for 6 hours. The result shows that the lanthanum-loaded iron carbon nanotube film has good adsorption performance under the acidic condition, and the adsorption capacity of the adsorbent is 44mg/g under the condition that the phosphorus concentration of a substrate is 150 mg-P/L.
Test example 3
Performance test of lanthanum-loaded iron carbon nanotube composite molecular sieve film obtained in example 3:
the lanthanum-loaded iron carbon nanotube composite molecular sieve film prepared in example 3 is placed in 100mL of phosphate solution at a concentration of 0.2g/L, and the initial pH is adjusted to perform a phosphate adsorption experiment, and the adsorption is performed for 6 hours. The result shows that the lanthanum-loaded iron carbon nanotube film has good adsorption performance under the acidic condition, and the adsorption capacity of the adsorbent is 47mg/g under the condition that the phosphorus concentration of a substrate is 150 mg-P/L.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (8)
1. The preparation method of the lanthanum-iron-carrying carbon nanotube composite molecular sieve film is characterized in that a carbon nanotube film is obtained through suction filtration after modification of a carbon nanotube by a wet soaking method, then a molecular sieve film is obtained through an in-situ hydrothermal synthesis method, and finally a lanthanum-iron compound is loaded on the molecular sieve film to obtain the lanthanum-iron-carrying carbon nanotube composite molecular sieve film;
the preparation method specifically comprises the following steps:
1) Adding carbon nano tubes into an organic solution, and performing ultrasonic treatment to obtain carbon nano tube dispersion liquid with uniform distribution concentration of 0.01 g/L-0.05 g/L as a first reaction liquid; the organic solution is polyethylene glycol octyl phenyl ether solution; the concentration of the polyethylene glycol octyl phenyl ether solution is 0.5-5 wt%;
2) Carrying out suction filtration on the first reaction liquid to obtain a carbon nanotube film adhered on filter paper, transferring the film into acetone for soaking until the filter paper is dissolved, and washing and drying to obtain the carbon nanotube film;
3) Preparing FAU molecular sieve membrane synthetic solution, transferring the FAU molecular sieve membrane synthetic solution into a reaction kettle, adding the carbon nanotube film for reaction, cooling the reaction kettle after the reaction is finished, taking out the film, washing and drying to obtain the carbon nanotube composite FAU molecular sieve film;
4) Immersing the carbon nano tube composite FAU type molecular sieve film into a lanthanum-iron mixed solution, and carrying out constant-temperature oscillation reaction to obtain a second reaction solution;
5) Adding alkali liquor into the second reaction solution, carrying out constant-temperature oscillation reaction, taking out the film after the reaction is finished, washing, and drying to obtain the lanthanum-loaded iron-carbon nanotube composite molecular sieve film;
step 3) the FAU molecular sieve membrane synthetic solution is prepared according to Na 2 O:Al 2 O 3 :SiO 2 :H 2 The mol ratio of O is (60-80) 1 (10-30) and (1000-3000);
the reaction temperature in the step 3) is 60-90 ℃ and the reaction time is 12-48 h.
2. The method of claim 1, wherein the carbon nanotubes in step 1) are single-walled carbon nanotubes or multi-walled carbon nanotubes; the ultrasonic time is 20-60 min.
3. The method of claim 1, wherein the filter paper of step 2) is a nitrocellulose membrane; the soaking time is 20-40 min.
4. The method of claim 1, wherein the washing of step 3) is washing with deionized water to pH = 7; the drying temperature is 100-120 ℃, and the drying time is 8-16 h.
5. The method according to claim 1, wherein the lanthanum-iron mixed solution in step 4) is a mixed solution of lanthanum nitrate and ferric nitrate; the mole ratio of lanthanum to iron in the mixed solution is (1-2): 1; the mass ratio of the total mass of lanthanum and iron elements to the carbon nano tube is (0.3-1): 1, a step of; the temperature of the constant-temperature oscillation reaction is 20-30 ℃, and the oscillation time is 2-8 h.
6. The process according to claim 1, wherein the concentration of the lye in step 5) is 0.5 to 2mol/L; the addition amount of the alkali liquor is that the concentration of the alkali in the second reaction liquid is 0.1mol/L; the oscillation speed is 150 rpm-250 rpm, and the oscillation time is 20 min-40 min; the drying temperature is 100-120 ℃ and the drying time is 8-16 h.
7. The lanthanum-loaded iron carbon nanotube composite molecular sieve film prepared by the preparation method of any one of claims 1 to 6.
8. A method for removing phosphate in water is characterized in that the lanthanum-loaded iron carbon nano tube composite molecular sieve film in claim 7 is placed into a polluted water body, multi-gradient pool purification is carried out on the water body, and after adsorption for a period of time, the lanthanum-loaded iron carbon nano tube composite molecular sieve film is recovered and recycled.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105921168A (en) * | 2016-04-28 | 2016-09-07 | 南开大学 | Preparation method of hydrodeoxidation isocatalyst, hydrodeoxidation isocatalyst and application thereof |
| CN106179473A (en) * | 2016-07-06 | 2016-12-07 | 上海应用技术学院 | The preparation method of nano zero valence iron/CNT/zeolite hybridization mesoporous molecular sieve composite material |
| CN106799206A (en) * | 2016-12-23 | 2017-06-06 | 句容亿格纳米材料厂 | A kind of carbon nanotube molecule sieves the preparation method and application of compound |
| CN113842883A (en) * | 2021-10-27 | 2021-12-28 | 北京师范大学珠海校区 | Lanthanum-loaded iron carbon nanotube film material for environmental remediation and preparation method and application thereof |
| CN114471674A (en) * | 2020-10-26 | 2022-05-13 | 中国石油化工股份有限公司 | Carbon nano tube/ZSM-5 molecular sieve compound and synthesis method and application thereof |
-
2023
- 2023-03-24 CN CN202310304382.6A patent/CN116474747B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105921168A (en) * | 2016-04-28 | 2016-09-07 | 南开大学 | Preparation method of hydrodeoxidation isocatalyst, hydrodeoxidation isocatalyst and application thereof |
| CN106179473A (en) * | 2016-07-06 | 2016-12-07 | 上海应用技术学院 | The preparation method of nano zero valence iron/CNT/zeolite hybridization mesoporous molecular sieve composite material |
| CN106799206A (en) * | 2016-12-23 | 2017-06-06 | 句容亿格纳米材料厂 | A kind of carbon nanotube molecule sieves the preparation method and application of compound |
| CN114471674A (en) * | 2020-10-26 | 2022-05-13 | 中国石油化工股份有限公司 | Carbon nano tube/ZSM-5 molecular sieve compound and synthesis method and application thereof |
| CN113842883A (en) * | 2021-10-27 | 2021-12-28 | 北京师范大学珠海校区 | Lanthanum-loaded iron carbon nanotube film material for environmental remediation and preparation method and application thereof |
Non-Patent Citations (2)
| Title |
|---|
| Adsorption of Pb(II) from Aqueous Solutions by Chemically Modified Zeolite supported Carbon Nanotubes: Equilibrium, Kinetic, and Thermodynamic Studies;D. K. Venkata Ramana等;Separation Science and Technology;第48卷;全文 * |
| EXTRACTION OF METALLIC NANOTUBES OF ZEOLITE-SUPPORTED SINGLE-WALLED CARBON NANOTUBES SYNTHESIZED FROM ALCOHOL;YUTAKA MAEDA;NANO: Brief Reports and Reviews;第2卷(第4期);全文 * |
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