CN108940187A - Magnetic mesoporous nanosphere and preparation method thereof for dephosphorization load lanthanum hydroxide - Google Patents
Magnetic mesoporous nanosphere and preparation method thereof for dephosphorization load lanthanum hydroxide Download PDFInfo
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- CN108940187A CN108940187A CN201810698172.9A CN201810698172A CN108940187A CN 108940187 A CN108940187 A CN 108940187A CN 201810698172 A CN201810698172 A CN 201810698172A CN 108940187 A CN108940187 A CN 108940187A
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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
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
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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
- B01J20/02—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
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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
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
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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
- B01J20/28009—Magnetic properties
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- 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
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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- 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
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Abstract
The invention discloses a kind of magnetic mesoporous nanospheres and preparation method thereof for dephosphorization load lanthanum hydroxide.This method is by Fe3O4@SiO2@mSiO2It is mixed with lanthanide series compound according to 30%~200% ratio, second alcohol and water is added, lye is added dropwise while stirring at room temperature after ultrasonic treatment makes to react completely, then takes out and carries out Magneto separate and drying, La (OH)3Load is completed.Preparation method of the invention is simple and convenient, and synthesis cost is low, has innovation, and the specific grain surface product prepared is big, and adsorption capacity and rate of adsorption performance are excellent, while having magnetism, are easily isolated and recycle, reusable.
Description
Technical field
The present invention relates to a kind of magnetic mesoporous nanospheres and preparation method thereof for dephosphorization load lanthanum hydroxide, belong to water
Contamination control field.
Background technique
Since water eutrophication phenomenon caused by phosphorus content is excessively high in water body is got worse, water body dephosphorized technology is drawn
Extensive concern is played.Currently, having chemical precipitation method, bioanalysis and suction for removing phosphatic method in water body mainly both at home and abroad
Attached method.Chemical method is although easy to operate, and phosphor-removing effect is significant, will not discharge phosphorus again, but operating cost is high, remaining metal
Ion is easy to generate murder by poisoning to aqueous bio.Bioanalysis phosphor-removing effect is unstable, is easy by water temperature, dissolved oxygen, nitric acid
The influence of the factors such as salt content, system operating load.There are respective advantage and disadvantage for both the above method, and not can be carried out phosphorus
Recycling.
Absorption method dephosphorization is the parent using certain porous or large specific surface area solid material to phosphate anion in water
And adsorption capacity, to realize the purpose removed to it.In comparison, this method economical and efficient, absorption are stablized, technique letter
It is single, it is reliable for operation, and may be implemented to separate phosphorus from water body, recycling phosphor resource is to re-use.It can be used as
The supplement of biological phosphate-eliminating can also be used as individual phosphorus removing method.
The selection criteria of dephosphorization adsorbent mainly has: adsorption capacity is high, selectivity is strong, the rate of adsorption is fast, resists other ions
Interference performance is strong, unharmful substance dissolution, performance is stable, renewable is strong etc..Currently, utilizing the material of absorption method dephosphorization
Active charcoal, biomass, metal oxide, silicon-based mesoporous molecular sieve, clay mineral etc..Mesoporous nano-grain is because it is with surface
With interfacial effect, high specific surface area, rule cellular structure and nanometer range can modulation aperture, by the shadow of these factors
It rings, the characteristic that this kind of particle has conventional material no.However existing mesoporous nano-grain has a defect that the suction for phosphorus
It is attached indifferent, it is influenced, is adsorbed unstable by other ions.
Summary of the invention
The purpose of the present invention is to provide a kind of magnetic mesoporous nanosphere for dephosphorization load lanthanum hydroxide and its preparations
Method.
Realize that the solution of the object of the invention is as follows:
A kind of preparation method of the magnetic mesoporous nanosphere for dephosphorization load lanthanum hydroxide, includes the following steps: step
1,
By FeCl3As source of iron, trisodium citrate is as stabilizer, in ethylene glycol simultaneously by using the reaction of hot solvent method
Magneto separate generates Fe3O4Nano particle；
Step 2, by Fe3O4Nano particle is added in aqueous isopropanol, is ultrasonically treated, and ammonium hydroxide and tetrem base is added dropwise
Silicate (TEOS), mechanical stirring and Magneto separate obtain Fe3O4@SiO2；
Step 3, by Fe3O4@SiO2It is added in alkali system, using surfactant templates and catalyst, mechanical stirring is led
Water-oil phase layering is caused, to have mesoporous dendroid SiO2It is wrapped in Fe3O4@SiO2The surface of nanosphere；
Step 4, by Fe3O4@SiO2@mSiO2It is mixed with lanthanide series compound, solvent is added, makes Fe3O4@SiO2@mSiO2And lanthanum
Based compound is evenly dispersed in a solvent, and lye, which is added dropwise, in ultrasonic treatment back mechanical stirring side makes to react completely, magnetic point after taking-up
From and it is dry, complete load.
Preferably, in step 1, FeCl3Dosage is 2.5~4g, and trisodium citrate dosage is 0.8~1.6g, and ethylene glycol is used
Amount is 80~120ml.
Preferably, in step 2, sonication treatment time is 30 minutes.
Preferably, in step 3, surfactant templates use hexadecyltrimethylammonium chloride (CTAC) or cetyl
Trimethylammonium bromide (CTAB), catalyst use triethanolamine (TEA) or ammonium hydroxide, and it is triethanolamine that above-mentioned alkali system, which is catalyst,
(TEA) or ammonium hydroxide provides.
Preferably, in step 4, lanthanide series compound is La (NO3)3·6H2O or LaCl3·7H2O, La (NO3)3·6H2O or
LaCl3·7H2O and Fe3O4@SiO2@mSiO2Ratio use 30%~200%.
Preferably, in step 4, solvent is second alcohol and water.
Compared with prior art, the present invention the advantage is that:
(1) the method for the present invention is simple and convenient, and synthesis cost is low, has novelty；
(2) the specific grain surface product of the method for the present invention preparation is big, and adsorption capacity and rate of adsorption performance are excellent, while having magnetic
Property, it is easily isolated and recycles, it is reusable.
Detailed description of the invention
Fig. 1 is the scanning electron microscope (SEM) photograph for the magnetic mesoporous nano particle that load has lanthanum hydroxide.
Fig. 2 is the transmission electron microscope picture for the magnetic mesoporous nano particle that load has lanthanum hydroxide.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawings and examples.
Embodiment 1
Step 1, by 3.25gFeCl3It is added in 100ml ethylene glycol with 1.2g trisodium citrate, 6g acetic acid is then added
Sodium stirs 1h energetically and forms clarified solution, is put into the hydrothermal reaction kettle of 120ml polytetrafluoroethylene (PTFE), is placed in baking oven at 200 DEG C of heat
10h is managed, taking-up is cooled to room temperature, obtains black product.It with ethyl alcohol and is washed three times, and with being dried in vacuo, obtains Fe3O4
Nano particle.
Step 2, the Fe of step 1 is taken3O4Nano particle 0.3g is added in 300ml aqueous isopropanol, ultrasonic treatment
30min, then 40 DEG C of oil baths, while 600rpm mechanical stirring then instill ammonium hydroxide and 36ml that 20ml mass fraction is 28%
Water, after stirring 30min, the TEOS of fast injection 1ml reacts and continues 2h, then carried out Magneto separate, then with ethyl alcohol and washing
Three times, and with being dried in vacuo, one layer of SiO has been wrapped up2Fe3O4Mesoporous nano-grain.
Step 3, the particle for taking 0.1g step 2 to obtain is added in TEA the and 54ml water of the CTAC and 0.2ml of 6g, ultrasound
30min, 300rpm stirs 1h at 60 DEG C, is slowly added into the mixed solution of 4mlTEOS and 36ml hexamethylene, the oil bath at 60 DEG C
12h, then Magneto separate collects product, and three times with ethyl alcohol and washing.It is calcined into 400min at 600 DEG C, is loaded
Two layers of SiO2Fe3O4Mesoporous nano-grain.
Step 4, the La (NO of the particle 60mg and 30mg that take step 3 to obtain3)3·6H220ml ethyl alcohol, ultrasound is added in O
30min, 300rpm is stirred at room temperature, while the NaOH that 12ml pH is 13 is added dropwise, and is reacted and is continued 4h, is taken out and is carried out Magneto separate, then
Vacuum drying, La (OH)3Load is completed.
Embodiment 2
The present embodiment is identical as first three step of embodiment 1, the difference is that 60mg LaCl is added in step 43·7H2O,
Solvent uses 10ml ethyl alcohol and 10ml water, and ultrasonic 30min, 300rpm is stirred at room temperature, while it is 13 that 12ml pH, which is added dropwise,
NaOH reacts and continues 4h, takes out and carries out Magneto separate, then is dried in vacuo, La (OH)3Load is completed.
Embodiment 3
The present embodiment is identical as first three step of embodiment 1, the difference is that 90mg La (NO is added in step 43)3·
6H2O, solvent use 20ml water, and ultrasonic 30min, 300rpm is stirred at room temperature, while the NaOH that 12ml pH is 13 is added dropwise, reaction
Continue 4h, takes out and carry out Magneto separate, then be dried in vacuo, La (OH)3Load is completed.
Comparative example 1
Particle 60mg and the La (NO of step 3 in Example 13)3·6H2O is mixed according to mass fraction 5:1, is added
10ml ethyl alcohol and 10ml water, ultrasonic 30min, 300rpm is stirred at room temperature, while the NaOH that 12ml pH is 13 is added dropwise, and reaction is held
Continuous 4h, takes out and carries out Magneto separate, then be dried in vacuo, loaded La (OH)3Magnetic mesoporous particle.
Phosphorus adsorption experiment is carried out with material at this time, since the doping of lanthanum is very few, adsorption effect is undesirable.
Comparative example 2
La (the NO of the particle 60mg and 60mg of step 3 in Example 13)3·6H210ml ethyl alcohol, ultrasound is added in O mixing
30min, 300rpm stirring for 24 hours, after evaporating to solvent, places it at 600 DEG C and calcines 400min, loaded at 80 DEG C
La (OH)3Magnetic mesoporous particle.
Phosphorus adsorption experiment is carried out with material at this time, since obvious agglomeration occurs for particle, adsorption effect is caused to be paid no attention to
Think.
In Examples 1 to 3, synthetic nano particle evaluates the adsorption effect of phosphorus with adsorption isotherm experiment, absorption
Data are fitted with Langmuir model and Freundlich model, the isothermal adsorption adsorbed such as the nano particle of table 1 to phosphorus
Shown in model parameter table.
Table 1
Claims (7)
1. a kind of preparation method of the magnetic mesoporous nanosphere for dephosphorization load lanthanum hydroxide, which is characterized in that including as follows
Step:
Step 1, by FeCl3As source of iron, trisodium citrate is reacted in ethylene glycol by using hot solvent method as stabilizer
And Magneto separate generates Fe3O4Nano particle；
Step 2, by Fe3O4Nano particle is added in aqueous isopropanol, is ultrasonically treated, and ammonium hydroxide and tetraethyl orthosilicic acid is added dropwise
Salt, mechanical stirring and Magneto separate obtain Fe3O4@SiO2；
Step 3, by Fe3O4@SiO2It is added in alkali system, using surfactant templates and catalyst, mechanical stirring leads to oil
Water two phase stratification, to have mesoporous dendroid SiO2It is wrapped in Fe3O4@SiO2The surface of nanosphere；
Step 4, by Fe3O4@SiO2@mSiO2It is mixed with lanthanide series compound, solvent is added, makes Fe3O4@SiO2@mSiO2With group of the lanthanides
It is evenly dispersed in a solvent to close object, lye, which is added dropwise, in ultrasonic treatment back mechanical stirring side makes to react completely, and Magneto separate is simultaneously after taking-up
It is dry, complete load.
2. the method according to claim 1, wherein in step 1, FeCl3Dosage is 2.5~4g, trisodium citrate
Dosage is 0.8~1.6g, and ethylene glycol dosage is 80~120ml.
3. the method according to claim 1, wherein sonication treatment time is 30 minutes in step 2.
4. the method according to claim 1, wherein surfactant templates use cetyl three in step 3
Ammonio methacrylate or cetyl trimethylammonium bromide, catalyst use triethanolamine or ammonium hydroxide.
5. the method according to claim 1, wherein the lanthanide series compound is La (NO in step 43)3·
6H2O or LaCl3·7H2O, La (NO3)3·6H2O or LaCl3·7H2O and Fe3O4@SiO2@mSiO2Ratio using 30%~
200%.
6. the method according to claim 1, wherein the solvent is second alcohol and water in step 4.
7. a kind of load the magnetic mesoporous of lanthanum hydroxide for dephosphorization based on method described in any one of claims 1-6 preparation
Nanosphere.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110947363A (en) * | 2019-12-04 | 2020-04-03 | 四川农业大学 | Magnetic-drive light carbon sponge for oil-water separation and preparation method thereof |
| CN112844300A (en) * | 2019-11-28 | 2021-05-28 | 南京理工大学 | Magnetic nanoparticles for removing glyphosate in water body and preparation method thereof |
| CN115475597A (en) * | 2022-08-10 | 2022-12-16 | 中国地质大学（武汉） | Core-shell magnetic mesoporous silica material, method for preparing same by using iron tailings and application of core-shell magnetic mesoporous silica material |
Citations (1)
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|---|---|---|---|---|
| CN102247804A (en) * | 2011-05-20 | 2011-11-23 | 上海大学 | Preparation method of active carbon fiber phosphorous removing agent carrying lanthanum hydroxide |
-
2018
- 2018-06-29 CN CN201810698172.9A patent/CN108940187A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102247804A (en) * | 2011-05-20 | 2011-11-23 | 上海大学 | Preparation method of active carbon fiber phosphorous removing agent carrying lanthanum hydroxide |
Non-Patent Citations (1)
| Title |
|---|
| JIANPING YANG ET AL: ""Monodisperse core-shell structured magnetic mesoporous aluminosilicate nanospheres with large dendritic mesochannels"", 《NANO RESEARCH》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112844300A (en) * | 2019-11-28 | 2021-05-28 | 南京理工大学 | Magnetic nanoparticles for removing glyphosate in water body and preparation method thereof |
| CN110947363A (en) * | 2019-12-04 | 2020-04-03 | 四川农业大学 | Magnetic-drive light carbon sponge for oil-water separation and preparation method thereof |
| CN115475597A (en) * | 2022-08-10 | 2022-12-16 | 中国地质大学（武汉） | Core-shell magnetic mesoporous silica material, method for preparing same by using iron tailings and application of core-shell magnetic mesoporous silica material |
| CN115475597B (en) * | 2022-08-10 | 2024-03-29 | 中国地质大学（武汉） | Core-shell magnetic mesoporous silica material, method for preparing material by using iron tailings and application of material |
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