CN105107524B - A kind of nano composite material of constant temperature catalyzing Formaldehyde decomposition and preparation method thereof - Google Patents
A kind of nano composite material of constant temperature catalyzing Formaldehyde decomposition and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of nano composite material of constant temperature catalyzing Formaldehyde decomposition and preparation method thereof.The nano composite material includes the silica supports with nano ordered meso-hole structure, thus has huge specific surface area；Its mesoporous inside and the area load mixed metal oxide catalyst of a large amount of Mn oxides with high activity, Cu oxide and cerium oxide, the catalyst granules of mixing is scattered in the duct with order mesoporous silica supports, with good peptizaiton, with higher catalytic activity, and enough spaces can be provided and adsorb substantial amounts of gas progress catalytic reaction.The present invention and then provide the preparation method of nano composite material, including the preparation steps of metal salt and silicon source mixed solution, settling step and calcining step.
Description
Technical field
The present invention relates to purification of air application material field, and in particular to a kind of nanometer for constant temperature catalyzing Formaldehyde decomposition
Composite and preparation method thereof, the nano material are applicable to the equipment such as filtering element for air purifier.
Background technology
Formaldehyde (HCHO) is a kind of common indoor air pollutants, and it is mainly derived from indoor hardware fitting and wood for furniture
Adhesive in material.In particularly newly-decorated room, indoor a large amount of finishing materials can give out substantial amounts of formaldehyde, cause interior
The content of formaldehyde in air seriously exceedes national standard.Formaldehyde is a kind of higher material of toxicity, can intense stimulus human body skin
Skin, eyes and respiratory tract, also have anesthetic effect to human central nervous.The formaldehyde of low concentration can damage human respiratory tract, long
Phase contact can insulting respiratory health.
The administering method used at present can be roughly classified into absorption method, photocatalytic oxidation, Ozonation and metal
Oxide catalyst method.Wherein absorption method has the characteristics that simple to operate, energy consumption is low.Lin Peng et al. is using the effective nitrogen component system of loading
Formaldehyde activity charcoal must be removed, its formaldehyde adsorbed, which is all fixed on, causes secondary pollution (woods except inside formaldehyde activity charcoal, being not easy to fly away
Roc, Lin Kai；Publication No.：CN 104607151 A).But rely on simple physical absorption, it is difficult to thoroughly remove formaldehyde；And at it
Manage it is limited in one's ability, when reach its adsorb upper limit when, formaldehyde cannot be reprocessed.In photocatalytic oxidation, the light of better performances is urged
Agent is titanium dioxide, and its energy PARA FORMALDEHYDE PRILLS(91,95) and organic matter etc. carry out catalytic degradation, but are easy to reunite and cause catalytic efficiency low
The problem of.Kan Bin etc. obtains formaldehyde catalysis material using carbon material supported titanium dioxide, because titanium dioxide is difficult to disperse, institute
Can only disperse in the solution, to be not easy to practical application (Kan Bin, Cheng Henglin；Application publication number：CN 104096465 A).Ozone
Oxidizing process is to be catalyzed Formaldehyde decomposition using the strong oxidizing property of ozone, but ozone has toxicity in itself, and people is 0.1- in concentration
Headache will be produced in 1ppm ozone, eyes are scorching hot, and respiratory tract can be stimulated, it is difficult to be applied to remove room air
In formaldehyde.Metal oxide oxidation catalyst method utilizes the metal oxide with catalytic action to be catalyzed formaldehyde point under normal temperature condition
Solution, there is fast reaction and use the loss-free feature of process.
In metal oxide oxidation catalyst method, study at present more catalyst mainly have noble metal, rare-earth oxide,
Transition-metals and their oxides etc..Wherein noble metal has good catalytic performance, but due to expensive, limiting it should
With.Using composite noble metal alloy, as activated centre, one kind is made by carrier of compound crystal type nano TiO 2 in Du Bin etc.
Composite noble metal alloy formaldehyde through catalytic oxidation agent, reduces the dosage of noble metal, it can be difficult to accomplishing to substitute noble metal (Du completely
Refined application publication number：CN 103357409 A).Rare earth metal and transition metal are because relative price is cheap, catalytic activity is higher
And become the alternative materials of noble metal.Because d layer electronics is unstable the situation of receiving and losing electrons easily occurs for transition metal, is formed
A variety of variable valences；In addition containing having vacant position and defect in structure, the quantity of active oxygen is both increased, so with stronger oxidation
Reducing property.Wherein PARA FORMALDEHYDE PRILLS(91,95) has stronger catalytic decomposition activity to the oxide of manganese and copper at normal temperatures.Therefore Mn oxide
It is a kind of catalyst for having higher catalytic activity.Cerium also has a variety of variable valences, when oxygen excess, cerium in rare earth element
It is changed into tetravalence from trivalent, plays a part of storing oxygen, in hypoxgia, cerium becomes trivalent again by tetravalence, and oxygen is discharged in lattice, increases
The quantity of active oxygen in system is added.When the oxide mixing of manganese, the oxide of copper and cerium carries out catalytic reaction, cerium, which plays, to be deposited
Storage and the synergy of release oxygen, improve overall catalytic activity；Simultaneously as the difference of several metal ion species radiuses of the above,
When molecular level mixes, it can mutually plug the gap, strengthen the mechanical strength of catalyst.In recent years also occur on several metals
The report of oxide catalytic composite material, but because the technical process of preparation method is more complicated, it is difficult to realize extensive real
Apply on border.
It is the reaction of pernicious gas in solid powder and air, so contact surface is straight in the spontaneous catalytic reaction of normal temperature
Connect the effect for having influence on catalytic reaction.The specific surface area of catalyst is bigger, and it is bigger with the contact area of air, the unit interval
Interior carried out catalytic reaction is more, and its catalytic activity is stronger.But present catalyst material is largely micron order accumulation
Particle, specific surface area is little, and in catalytic reaction process, only in action, internal is difficult with the particle on surface,
It greatly limit the catalytic activity of material.
The content of the invention
Based on above-mentioned the problem of being previously mentioned, it is an object of the present invention to provide a kind of receiving for constant temperature catalyzing Formaldehyde decomposition
Nano composite material and preparation method thereof, this nano composite material preparation process is simple, and can rapidly and efficiently be catalyzed at room temperature
Decompose the formaldehyde in room air.
The invention provides a kind of nano composite material of constant temperature catalyzing Formaldehyde decomposition, the nano composite material includes two
Silica support, the silica supports have nano ordered meso-hole structure；Also, the silica supports is mesoporous
Inner dispersion carries metal oxide catalyst.
Preferably, the metal oxide catalyst is Mn oxide, Cu oxide and cerium oxide particle mixture.
Preferably, the mesoporous aperture in the silica supports is 1-20nm.
Preferably, in the nano composite material, the mol ratio of metal oxide catalyst and silica is 1:
(1.0-40).It is further preferred that the mol ratio of metal oxide catalyst and silica is 1: (1.7-20).
Preferably, in the nano composite material, the Mn oxide has divalent manganesetion (MnII), the copper oxygen
Compound is with bivalent cupric ion (CuII), the cerium oxide with trivalent cerium ion (CeIII).
Preferably, in the nano composite material, described MnII, CuII and CeIII mol ratio are (0.67-0.87)
∶(0.1-0.3)∶(0.03-0.15).It is further preferred that MnII, CuII and CeIII mol ratio are (0.67-0.87):
(0.12-0.25)∶(0.06-0.15)。
The nano composite material of the catalyst is nano ordered meso-hole structure, and there is huge specific surface area (to compare surface
Product 500-1000cm2/g)；A large amount of Mn oxide, Cu oxide and the ceriums with high activity of its mesoporous inside and area load
The mixed metal oxide catalyst of oxide, the catalyst granules of mixing are scattered in the duct of mesoporous silicon oxide, had
Good peptizaiton, there is higher catalytic activity；It is largely order mesoporous inside mesoporous silicon oxide not only to disperse to hold
Scattered catalyst granules is carried, and enough spaces can be provided and adsorb substantial amounts of gas progress catalytic reaction.
When the oxide mixing of manganese, the oxide of copper and cerium carries out the catalytic reaction of PARA FORMALDEHYDE PRILLS(91,95), cerium plays storage and released
The synergy of oxygen is put, improves overall catalytic activity.Simultaneously as several metal (manganese, copper and cerium) ionic radius of the above
Difference, when molecular level mixes, it can mutually plug the gap, strengthen the mechanical strength of catalyst.Therefore three kinds of manganese, copper and cerium oxidations
Thing is used in mixed way, and in catalytic reaction, due to mutual synergy, enhances the mechanical strength of nano composite material.
In order to prepare above-mentioned nano composite material, present invention also offers a kind of nano combined material of constant temperature catalyzing Formaldehyde decomposition
The preparation method of material, this method generation has order mesoporous silica supports, and during synthesis, will include manganese
The mixed metal oxide catalyst of oxide, Cu oxide and cerium oxide is dispersedly carried on the work of the support material internal
On property site.
The preparation method of the constant temperature catalyzing Formaldehyde decomposition nano composite material comprises the following steps：Metal salt and silicon source mixing
Preparation steps, settling step and the calcining step of solution；Wherein, the preparation steps of metal salt and silicon source mixed solution are specific such as
Under：MnII salt, CuII salt and CeIII salt are dissolved in water, are sufficiently stirred the mixing salt solution to form clarification；By silicon source and table
Face activating agent mixed dissolution obtains silicon source solution；Alkali lye regulation pH value is first added into above-mentioned silicon source solution, then adds mixing
Salting liquid, metal salt and silicon source mixed solution are formed, and be stirred vigorously during above-mentioned addition；Settling step specifically wraps
Include：After reacting certain time, the metal salt and silicon source mixed solution are filtered, and dry and obtain powder；By resulting powder
It is scattered in the ethanol solution of certain temperature after certain time, filters, drying, obtain the powder after decentralized processing；Calcining step
Specifically include：Powdered thing is obtained after the powder after above-mentioned decentralized processing is calcined into certain time under certain calcining heat
Matter, the as nano material with nano ordered mesoporous silica O composite metallic oxide catalyst.
Preferably, described silicon source is one kind in sodium metasilicate, tetraethyl orthosilicate.
Preferably, described surfactant be Cetyltrimethylammonium bromide, cetyl trimethylammonium bromide,
One kind in dodecyl sodium sulfate, neopelex.It is further preferred that the concentration of described surfactant is
0.02-1g/100mL.It may further be preferable that the concentration of the surfactant is 0.05-0.8g/100mL.Such as reactant
The amount of the Cetyltrimethylammonium bromide put into system in every 1000mL water is controlled in the range of 0.2-10g, preferably dosage
For 0.5-8g.
Preferably, described MnII salt is one kind in manganese sulfate, manganese nitrate.
Preferably, described CuII salt is one kind in copper sulphate, copper nitrate.
Preferably, described CeIII salt is cerous nitrate.
Preferably, described alkali lye is one kind in sodium hydroxide, ammoniacal liquor.
Preferably, the molar ratio of described MnII, CuII and CeIII salt is (0.67-0.87): (0.1-0.3):
(0.03-0.15).It is further preferred that the molar ratio of MnII, CuII and CeIII salt is (0.67-0.87): (0.12-
0.25)∶(0.06-0.15)。
Preferably, the silicon source solution before alkali lye, mixing salt solution reaction with being heated to 30-90 DEG C.Preferably,
The silicon source solution before alkali lye, mixing salt solution reaction with being heated to 40-85 DEG C.
Preferably, in the step of successively adding alkali lye and mixing salt solution into silicon source solution, metal salt and silicon source are mixed
The pH for closing solution is maintained at 8-11.It is further preferred that the pH of metal salt and silicon source mixed solution is maintained at 8.5-10.
Preferably, the reaction time range of silicon source solution and mixing salt solution and alkali lye is 0.5-10h.Preferably,
The reaction time range is 0.5-5h.
Preferably, the time that powder described in settling step is scattered in ethanol solution is 3-40h.It is further preferred that institute
It is 5-30h to state powder to be scattered in time of ethanol solution.
Preferably, the temperature of ethanol solution described in settling step is 30-70 DEG C.It is further preferred that the ethanol is molten
The temperature of liquid is 40-68 DEG C.
Preferably, in calcining step, the calcining heat is 300-800 DEG C.It is further preferred that the calcining heat is
350-700℃。
Preferably, in calcining step, the time range of the powder calcining is 0.5-5h.It is further preferred that the powder
The time range of end calcining is 1-5h.
The process of nano ordered meso-hole structure is formed in above-mentioned course of reaction is：Due to the intrinsic category of surfactant
Property, when it reaches finite concentration in the solution, its hydrophobic side can condense together, and water-wet side then can form a setting outwardly
The micella of shape.During reaction, the outermost water-wet side of micella and the precursor of silicon source or metal oxide are combined, and
Silicon source in micella outer layer can be also combined with the precursor of metal oxide；Removed during calcining inside micella
Surfactant, internal hollow structure part just are formed the mesoporous part of composite.Also, during the course of the reaction,
Catalyst precursor and hydrolysis silicon source compound and a small amount of surfactant are combined, and are uniformly dispersed among mesoporous material,
Serve the effect of nature dispersed catalyst；In addition, after the completion of precursor preparation, decentralized processing is carried out with ethanol, to material
Scattered effect is also played, so as to which course of reaction improves dispersiveness of the catalyst among mesoporous SiO 2 structure.
Compared with prior art, the invention has the advantages that：1st, the synthesis step of catalyst is simple；2nd, active metal oxygen
Compound catalyst distribution has the characteristics of good dispersion, activity is high in the duct of ordered mesoporous silica dioxide；3rd, carrier material
With huge specific surface area, the space provided for catalytic reaction, the high efficiency of catalyst ensure that；4th, three kinds of active materials
Mixed in molecular level, play concerted catalysis effect, improve overall catalytic activity.
Brief description of the drawings
Accompanying drawing 1 is the SEM structural representations of nano composite material sample prepared by embodiment 1；
Accompanying drawing 2 is the SEM structural representations of nano composite material sample prepared by embodiment 2；
Accompanying drawing 3 is the SEM structural representations of nano composite material sample prepared by embodiment 3；
Accompanying drawing 4 is the SEM structural representations of nano composite material sample prepared by embodiment 4；
Accompanying drawing 5 is the SEM structural representations of nano composite material sample prepared by embodiment 5.
Embodiment
Below by embodiment, and with reference to accompanying drawing, technical scheme is described in further detail.
Embodiment 1
14.71g manganese sulfate monohydrates, 2.50g cupric sulfate pentahydrates and the water cerous nitrates of 1.33g six are dissolved in 200mL pure water,
It is sufficiently stirred the mixing salt solution to form clarification；The water sodium metasilicate of 28.42g nine and 2.00g Cetyltrimethylammonium bromides are mixed
Conjunction, which is dissolved in 1000mL pure water, obtains silicon source solution, adds the pH to 9.0 of 14mL 1mol/L sodium hydrate regulator solution,
And it is heated to 30 DEG C；Above-mentioned mixing salt solution is rapidly joined into above-mentioned silicon source solution, and is stirred vigorously；After reacting 2h, filter
Metal salt and silicon source mixed solution, resulting filter residue powder is scattered in constant temperature stirring 30h in 50 DEG C of ethanol solutions and divided
Processing is dissipated, is then filtered；Powdered substance is obtained after the filter residue powder after above-mentioned decentralized processing is calcined into 0.5h at 800 DEG C,
As there is the nano composite material of nano ordered mesoporous silicon oxide complex copper manganese cerium catalyst.
(the SEM structural representations of nano composite material sample manufactured in the present embodiment as shown in Figure 1), table are tested through SEM
The skeleton of bright synthesized catalyst nano composite is ordered mesopore structure, and its aperture is between 1-20nm.
Take the composite nano materials of the above-mentioned preparations of 1.00g to be placed in a diameter of 5mm glass tube on core and carry out catalysis point
Solve Activity Assessment.The bottom of glass tube is connected with formaldehyde generator, and top is connected with gas chromatograph on-line detector.Pump is by sky
Tympanites enters in formaldehyde generator and formaldehyde is mixed to get containing the air that concentration of formaldehyde is 120ppm, and the air containing formaldehyde enters from bottom
Enter in the glass tube equipped with composite catalyst, then the content of formaldehyde is detected through being entered at the top of glass tube in chromatography of gases.Detection
As a result show, 120ppm formaldehyde is catalytically decomposed once at ambient temperature for the composite catalyst prepared in the present embodiment
Efficiency be 99%.
Embodiment 2
The water manganese nitrates of 0.42g tetra-, 0.19g cupric sulfate pentahydrates and the water cerous nitrates of 0.03g six are dissolved in 200mL pure water,
It is sufficiently stirred the mixing salt solution to form clarification；The water sodium metasilicate of 28.42g nine and 0.20g Cetyltrimethylammonium bromides are mixed
Conjunction, which is dissolved in 1000mL pure water, obtains silicon source solution, adds the pH to 8.0 of 10mL 1mol/L sodium hydrate regulator solution,
And it is heated to 30 DEG C；Above-mentioned mixing salt solution is rapidly joined into above-mentioned silicon source solution, and is stirred vigorously；After reacting 0.5h, take out
Metal salt and silicon source mixed solution are filtered, resulting filter residue powder is scattered in into constant temperature stirring 5h in 70 DEG C of ethanol solutions is divided
Processing is dissipated, is then filtered；Powdered substance is obtained after the filter residue powder after above-mentioned decentralized processing is calcined into 5h at 300 DEG C, i.e.,
For nano composite material (the present embodiment as shown in Figure 2 with nano ordered mesoporous silicon oxide complex copper manganese cerium catalyst
The SEM structural representations of the nano composite material sample of preparation).
Catalytic performance test is with embodiment 1, and the composite catalyst that testing result shows to prepare in the present embodiment is in room temperature bar
The efficiency that 120ppm formaldehyde is catalytically decomposed once under part is 97.5%.
Embodiment 3
The water manganese nitrates of 0.87g tetra-, 0.20g cupric sulfate pentahydrates and the water cerous nitrates of 0.33g six are dissolved in 200mL pure water,
It is sufficiently stirred the mixing salt solution to form clarification；The water sodium metasilicate of 28.42g nine and 10.00g Cetyltrimethylammonium bromides are mixed
Conjunction, which is dissolved in 1000mL pure water, obtains silicon source solution, adds the pH to 11.0 of 23mL 1mol/L sodium hydrate regulator solution,
And it is heated to 30 DEG C；Above-mentioned mixing salt solution is rapidly joined into above-mentioned silicon source solution, and is stirred vigorously；After reacting 5h, filter
Metal salt and silicon source mixed solution, in 30 DEG C of ethanol solutions after constant temperature stirring 20h, then resulting filter residue powder is scattered in
Filter；Powdered substance is obtained after the filter residue powder after above-mentioned decentralized processing is calcined into 3h at 400 DEG C, as with nanoscale
The nano composite material of ordered mesoporous silica dioxide complex copper manganese cerium catalyst (answer as shown in Figure 3 by nanometer manufactured in the present embodiment
The SEM structural representations of condensation material sample).
Catalytic performance test is with embodiment 1, and the composite catalyst that testing result shows to prepare in the present embodiment is in room temperature bar
The efficiency that 120ppm formaldehyde is catalytically decomposed once under part is 97.5%.
Embodiment 4
The water manganese nitrates of 1.76g tetra-, 0.41g copper nitrates and the water cerous nitrates of 0.35g six are dissolved in 200mL pure water, fully
Stirring forms the mixing salt solution of clarification；The water sodium metasilicate of 28.42g nine and 4.00g Cetyltrimethylammonium bromides are mixed molten
Solution obtains silicon source solution in 1000mL pure water, adds the 19mL 1mol/L pH of sodium hydrate regulator solution to 10.0, and add
Heat is to 30 DEG C；Above-mentioned mixing salt solution is rapidly joined into above-mentioned silicon source solution, and is stirred vigorously；After reacting 4h, metal is filtered
Salt and silicon source mixed solution, resulting filter residue powder is scattered in 40 DEG C of ethanol solutions after constant temperature stirring 25h, then taken out
Filter；Powdered substance is obtained after the filter residue powder after above-mentioned decentralized processing is calcined into 2h at 500 DEG C, is as had with nanoscale
The nano composite material of sequence mesoporous silicon oxide complex copper manganese cerium catalyst is (manufactured in the present embodiment nano combined as shown in Figure 4
The SEM structural representations of material sample).
Catalytic performance test is with embodiment 1, and the composite catalyst that testing result shows to prepare in the present embodiment is in room temperature bar
The efficiency that 120ppm formaldehyde is catalytically decomposed once under part is 98.5%.
Embodiment 5
6.93g manganese sulfate monohydrates, 2.25g cupric sulfate pentahydrates and the water cerous nitrates of 2.17g six are dissolved in 200mL pure water,
It is sufficiently stirred the mixing salt solution to form clarification；The water sodium metasilicate of 28.42g nine and 7.00g Cetyltrimethylammonium bromides are mixed
Conjunction, which is dissolved in 1000mL pure water, obtains silicon source solution, adds the pH to 9.5 of 17.3mL1mol/L sodium hydrate regulator solution,
And it is heated to 30 DEG C；Above-mentioned mixing salt solution is rapidly joined into above-mentioned silicon source solution, and is stirred vigorously；After reacting 3h, filter
Metal salt and silicon source mixed solution, resulting filter residue powder is scattered in constant temperature stirring 40h in 60 DEG C of ethanol solutions and divided
Processing is dissipated, is then filtered；Powdered substance is obtained after the filter residue powder after above-mentioned decentralized processing is calcined into 2.5h at 600 DEG C,
As there is nano composite material (this implementation as shown in Figure 5 of nano ordered mesoporous silicon oxide complex copper manganese cerium catalyst
The SEM structural representations of nano composite material sample prepared by example).
Catalytic performance test is with embodiment 1, and the composite catalyst that testing result shows to prepare in the present embodiment is in room temperature bar
The efficiency that 120ppm formaldehyde is catalytically decomposed once under part is 98%.
Above example is merely to illustrate the present invention, and not limitation of the present invention, the common skill about technical field
Art personnel, without departing from the spirit and scope of the present invention, it can also make a variety of changes and modification, thus it is all etc.
Same technical scheme falls within scope of the invention, and scope of patent protection of the invention should be defined by the claims.
Claims (8)
1. a kind of nano composite material of constant temperature catalyzing Formaldehyde decomposition, the nano composite material include silica supports, institute
Stating silica supports has nano ordered meso-hole structure；Also, the mesoporous inner dispersion carrying of the silica supports
There is metal oxide catalyst；
The preparation method of the nano composite material of the constant temperature catalyzing Formaldehyde decomposition comprises the following steps：Metal salt and silicon source mixing
Preparation steps, settling step and the calcining step of solution；Wherein, the preparation steps of metal salt and silicon source mixed solution are specific such as
Under：The salt of Mn II, the salt of Cu II and the salt of Ce III are dissolved in water, are sufficiently stirred the mixing salt solution to form clarification；By silicon source and table
Face activating agent mixed dissolution obtains silicon source solution；Alkali lye regulation pH value is first added into above-mentioned silicon source solution, is then added above-mentioned
Mixing salt solution, metal salt and silicon source mixed solution are formed, and be stirred vigorously during above-mentioned addition；Settling step is specific
Including：After reacting certain time, the metal salt and silicon source mixed solution are filtered, and dry and obtain powder；By resulting powder
End is scattered in the ethanol solution of certain temperature after certain time, is filtered, drying, is obtained the powder after decentralized processing；Calcining step
Suddenly specifically include：Powdered thing is obtained after the powder after above-mentioned decentralized processing is calcined into certain time under certain calcining heat
Matter, the as nano material with nano ordered mesoporous silica O composite metallic oxide catalyst.
2. nano composite material according to claim 1, it is characterised in that the metal oxide catalyst aoxidizes for manganese
Thing, Cu oxide and cerium oxide particle mixture.
3. nano composite material according to claim 1, it is characterised in that in the nano composite material, metal oxidation
The mol ratio of thing catalyst and silica is 1:(1.0-40).
4. nano composite material according to claim 3, it is characterised in that metal oxide catalyst and silica
Mol ratio is 1:(1.7-20).
5. nano composite material according to claim 1, it is characterised in that in the nano composite material, the Mn II,
Cu II and Ce III mol ratio are (0.67-0.87):(0.1-0.3):(0.03-0.15).
6. nano composite material according to claim 5, it is characterised in that Mn II, Cu II and Ce III mol ratio is
(0.67-0.87):(0.12-0.25):(0.06-0.15)。
A kind of 7. preparation method of constant temperature catalyzing Formaldehyde decomposition nano composite material according to claim 1, it is characterised in that bag
Include following steps：The preparation steps of metal salt and silicon source mixed solution, settling step and calcining step；Wherein, metal salt and silicon
The preparation steps of source mixed solution are specific as follows：The salt of Mn II, the salt of Cu II and the salt of Ce III are dissolved in water, be sufficiently stirred to be formed it is clear
Clear mixing salt solution；Silicon source and surfactant mixed dissolution are obtained into silicon source solution；First added into above-mentioned silicon source solution
Alkali lye adjusts pH value, then adds above-mentioned mixing salt solution, forms metal salt and silicon source mixed solution, and in the mistake of above-mentioned addition
It is stirred vigorously in journey；Settling step specifically includes：After reacting certain time, the metal salt and silicon source mixed solution are filtered, and
Drying obtains powder；Resulting powder is scattered in the ethanol solution of certain temperature after certain time, filters, drying, obtains
Obtain the powder after decentralized processing；Calcining step specifically includes：By the powder after above-mentioned decentralized processing under certain calcining heat
Powdered substance is obtained after calcining certain time, is as urged with nano ordered mesoporous silica metal composite oxide
The nano material of agent.
8. preparation method according to claim 7, it is characterised in that described silicon source is in sodium metasilicate, tetraethyl orthosilicate
One kind.
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| CN106975493A (en) * | 2017-04-20 | 2017-07-25 | 宁波钛安新材料科技有限公司 | A kind of honeycomb catalyst materials and its forming method |
| CN107243321B (en) * | 2017-04-21 | 2019-07-26 | 浙江理工大学 | A kind of air cleaning material of long-acting removal organic polluter |
| CN108654556A (en) * | 2018-05-28 | 2018-10-16 | 福建远翔新材料股份有限公司 | A kind of preparation method of nanometer of national standard method overlay film silica formaldehyde purifying agent |
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| CN110721579A (en) * | 2019-11-12 | 2020-01-24 | 庆泓技术(上海)有限公司 | Method for deodorizing and sterilizing refrigerator |
| CN110975853A (en) * | 2019-11-29 | 2020-04-10 | 扬州大学 | Transition metal doped micron-sized spherical silicon dioxide catalyst and preparation method thereof |
| CN112604693B (en) * | 2020-12-15 | 2022-03-15 | 南京工业大学 | Mesoporous manganese-based composite oxide and preparation method and application thereof |
| TW202320910A (en) * | 2021-11-24 | 2023-06-01 | 香港商信山科藝有限公司 | Catalyst compositions and methods for decomposing formaldehyde thereof |
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| CN103962174A (en) * | 2014-05-20 | 2014-08-06 | 大连理工大学 | AgCo bimetallic catalyst with adsorption-catalysis double functions for use in removal of formaldehyde and preparation method thereof |
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