CN109395733A - Fe2O3The preparation and the application in VOCs degradation for loading diatom soil ball catalysis material - Google Patents
Fe2O3The preparation and the application in VOCs degradation for loading diatom soil ball catalysis material Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 230000015556 catabolic process Effects 0.000 title claims abstract description 11
- 238000006731 degradation reaction Methods 0.000 title claims abstract description 11
- 239000002689 soil Substances 0.000 title claims description 22
- 238000006555 catalytic reaction Methods 0.000 title claims description 20
- 239000012855 volatile organic compound Substances 0.000 title abstract description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 64
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000002253 acid Substances 0.000 claims abstract description 11
- 239000008367 deionised water Substances 0.000 claims abstract description 11
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 11
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 claims description 34
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 30
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 24
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 12
- 238000001179 sorption measurement Methods 0.000 claims description 12
- NVVGMIRCFUVBOB-UHFFFAOYSA-N acetic acid;iron Chemical compound [Fe].CC(O)=O NVVGMIRCFUVBOB-UHFFFAOYSA-N 0.000 claims description 10
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 239000005909 Kieselgur Substances 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- 238000013019 agitation Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 5
- 229960000935 dehydrated alcohol Drugs 0.000 claims description 5
- 235000006408 oxalic acid Nutrition 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 239000000725 suspension Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 238000005286 illumination Methods 0.000 claims description 2
- 231100000331 toxic Toxicity 0.000 claims description 2
- 230000002588 toxic effect Effects 0.000 claims description 2
- 230000001699 photocatalysis Effects 0.000 abstract description 9
- 239000003054 catalyst Substances 0.000 abstract description 6
- 239000002131 composite material Substances 0.000 abstract 1
- 238000009776 industrial production Methods 0.000 abstract 1
- 238000005303 weighing Methods 0.000 abstract 1
- 239000000523 sample Substances 0.000 description 14
- GOKIPOOTKLLKDI-UHFFFAOYSA-N acetic acid;iron Chemical compound [Fe].CC(O)=O.CC(O)=O.CC(O)=O GOKIPOOTKLLKDI-UHFFFAOYSA-N 0.000 description 8
- 238000011160 research Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000007146 photocatalysis Methods 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 239000003463 adsorbent Substances 0.000 description 3
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011941 photocatalyst Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000010148 water-pollination Effects 0.000 description 1
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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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/74—Iron group metals
- B01J23/745—Iron
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
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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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
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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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/106—Silica or silicates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
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Abstract
本发明属于气相光催化材料技术领域，提供了一种Fe2O3负载硅藻土球光催化材料的制备以及在VOCs降解中的应用，该制备方法包括：(1)称取一定量酸处理好的硅藻土球，(2)将上述硅藻土球加入到含有Fe(AC)3的去离子水中，静置，使硅藻土充分吸附Fe3+，(3)过滤并清洗、干燥后，将硅藻土球经热处理，即可得到负载Fe2O3的硅藻土球。通过上述简单的实验步骤，可以得到Fe2O3负载硅藻土球这样一种新型的复合材料。该Fe2O3负载硅藻土球光催化材料有效实现VOCs的降解。由此得到的催化剂不仅制备方法简单，而且由于Fe2O3的负载，导致气相光催化活性显著提高，此外，以硅藻土为载体，清洁环保，价格便宜，能够有效实现大批量的工业生产。
The invention belongs to the technical field of gas-phase photocatalytic materials, and provides the preparation of a Fe 2 O 3 supported diatomite ball photocatalytic material and its application in the degradation of VOCs. The preparation method includes: (1) weighing a certain amount of acid for treatment Good diatomite balls, (2) add the above-mentioned diatomite balls to deionized water containing Fe(AC) 3 , let stand, make the diatomite fully adsorb Fe 3+ , (3) filter, wash and dry Then, the diatomite balls are heat-treated to obtain Fe 2 O 3 loaded diatomite balls. Through the above simple experimental steps, a new type of composite material such as Fe 2 O 3 loaded diatomite spheres can be obtained. The Fe2O3 - supported diatomite sphere photocatalytic material effectively achieves the degradation of VOCs. The catalyst thus obtained not only has a simple preparation method, but also has significantly improved gas-phase photocatalytic activity due to the loading of Fe 2 O 3 . In addition, using diatomite as a carrier is clean, environmentally friendly, and inexpensive, and can effectively achieve large-scale industrial production. .
Description
Technical field
The invention belongs to gas-phase photocatalysis field of material technology, provide a kind of Fe2O3Load diatom soil ball catalysis material
Preparation method, it is effective to realize VOCs degradation.
Background technique
Volatile organic matter (volatile organic compouds, VOCs) is main atmosphere pollution, because of its tool
There is the features such as many kinds of, from a wealth of sources, harmfulness is big, becomes the focus that people are concerned.In recent years, people were for VOCs
Research it is more and more.Since VOCs has the characteristics that deenergized period is long, harm to the human body is big, it will lead to and live in for a long time
People in the exceeded environment of VOCs, different degrees of suffers from various diseases, in some instances it may even be possible to loss of life.How to efficiently control big
Volatile organic matter pollution situation in gas improves atmospheric environment, ensures that people's health is a problem to be solved.Numerous
In VOCs, acetaldehyde is one of main representative object of indoor polluted gas, its molecular weight is smaller, and containing aldehyde radical, hydrophily is presented
With stronger polarity, the present invention in select acetaldehyde as represent, to probe into Fe2O3Load this novel photocatalysis material of diatom soil ball
Expect the absorption degradation performance for VOCs.
A kind of carrier of the diatomite as clean and environmental protection, on wall shell there are many multistage, a large amount of, ordered arrangement micropores and
Mesoporous, this unique multi-stage artery structure makes it have many excellent performances, such as: high porosity, permeable knot
Structure, chemical resistance, high-purity, large specific surface area, adsorption capacity is big, and absorption property is good etc..Due to the unique physics and chemistry of diatomite
Matter and stronger adsorption capacity, as a kind of adsorbent, potential application value has caused researchers at home and abroad
Pay much attention to, there are many reports for the Controlling research as adsorbent to pollutant, but most researchs are concentrated in the solution
In the processing of pollutant.As far as we know, so far using diatomite as adsorbent removal volatile organic matter VOCs's
Research is rarely reported.
Photocatalitic Technique of Semiconductor is important means the problems such as solving environmental pollution and energy shortage.At present in research
Conductor photocatalysis material is mainly faced with the low problem low with reaction efficiency of sun light utilization efficiency.Therefore efficient visible light is found
No matter the novel photocatalyst of response is all of great significance in scientific research or in engineer application function.Fe2O3Band gap is
2.1eV, energy absorbing wavelength is less than the sunlight of 600nm, nontoxic, and performance is stable, raw material is cheap, environmentally friendly, is to work as
One of most desired catalysis material of preceding research.Nanometer Fe2O3It is special with nontoxic low pollution, superior magnetic property, semiconductor
Property, the advantages that good light resistance, chromatography be wide, corrosion resistance, have in numerous areas such as environmental protection, catalyst and widely answer
With.
Summary of the invention
The present invention is in order to provide a kind of simple preparation method, to prepare Fe2O3Load diatom soil ball is urged for gas phase light
The catalyst of change successfully improves the photocatalytic activity of the material by the compound of two kinds of materials,
Specific technical solution is as follows:
Fe2O3The preparation method for loading diatom soil ball catalysis material, includes the following steps:
(1) acetic acid iron powder is dissolved in deionized water, forms solution；
(2) by acid, treated that diatomite is added in the solution that step (1) obtains, wherein diatomite and acetic acid iron powder
Mass ratio be respectively 5~20:1, stand a period of time, so that diatomite is sufficiently adsorbed Fe3+, obtain suspension；
(3) suspension in step (2) is filtered, to separate diatomite, and is cleaned, dring silicon diatomaceous earth；
(4) diatomite obtained in step (3) is heat-treated again, Fe is obtained after heat treatment2O3Load diatom soil ball
Catalysis material.
Further, acid described in above-mentioned steps (2) is handled are as follows: 0.1mol/L oxalic acid is prepared, diatomite is Celsius 80
Spend magnetic agitation 5h in water-bath.
Further, 400~600 DEG C of heat treatment temperature in above-mentioned steps (4), the processing time is 1~3h.
Further, the mass concentration of acetic acid ferrous solution obtained in above-mentioned steps (1) is 5~20g/L.
Further, time of repose is 1~3h in above-mentioned steps (2).
Further, above-mentioned steps (3) drying temperature be 40~70 DEG C, the time be 12~for 24 hours.
Further, cleaning described in above-mentioned steps (3) is to be cleaned multiple times using deionized water and dehydrated alcohol.
The present invention also provides a kind of above-mentioned Fe2O3Load diatom proposes the application of soil ball catalysis material, by the Fe2O3It is negative
Diatom soil ball catalysis material is carried to be placed in the environment storehouse full of toxic polluted gas；Environment storehouse is in completely black dark situation first
In, reach adsorption equilibrium；After adsorption equilibrium, additional visible light illumination degrades to the polluted gas；The dirt
Dye gas is acetaldehyde, 3.5~4.5ppm of concentration of acetaldehyde in the closed system；The adsorption time is 0.5-2h.
The invention has the benefit that preparation method is easy, and using diatomite as carrier, material is environment friendly and pollution-free, cheaply
It is easy to get, is conducive to industrial mass production, Fe2O3As a kind of narrow bandgap semiconductor material, load on such a carrier,
Its gas-phase photocatalysis performance can be effectively improved, conducive to the degradation of VOCs.
Detailed description of the invention
Fig. 1 is the different sintered optical photographs of Fe content sample；(a) the original sample of diatomite, (b) diatomite and ferric acetate
When the mass ratio of powder is respectively 20:1, when (c) diatomite and the mass ratio of acetic acid iron powder are respectively 10:1, (d) diatomite
When being respectively 5:1 with the mass ratio of acetic acid iron powder.
Fig. 2 is the SEM photograph under different loads amount；(a) (b) is the original sample of diatomite, and (c) (d) is diatomite and acetic acid
When the mass ratio of iron powder is respectively 20:1, when (e) (f) is respectively 10:1 for the mass ratio of diatomite and acetic acid iron powder, (g)
(h) when the mass ratio for diatomite and acetic acid iron powder is respectively 5:1.
Fig. 3 is the EDS power spectrum under different loads amount；(a) the original sample of diatomite, (b) matter of diatomite and acetic acid iron powder
When amount is than being respectively 20:1, when (c) diatomite and the mass ratio of acetic acid iron powder are respectively 10:1, (d) diatomite and ferric acetate
When the mass ratio of powder is respectively 5:1.
Fig. 4 is acetaldehyde degradation curve.
Specific embodiment
In order to better explain the present invention, it is described in detail as follows in conjunction with attached drawing, preferably so as to this field related personnel
Understand the present invention, but following embodiment is not used in the limitation present invention.
Embodiment 1
(1) it weighs 0.5g ferric acetate to be added in 100ml deionized water, then be stirred using blender transparent to solution；
(2) 10g diatomite is subjected to sour processing, the acid processing are as follows: prepare 0.1mol/L oxalic acid, diatomite is taken the photograph 80
Magnetic agitation 5h in family name's degree water-bath.
(3) by treated diatomite the is added to solution in above-mentioned (1) of acid in (2), 2h is stood, adsorbs diatomite sufficiently
Fe3+；
(4) diatomite in above-mentioned (3) is filtered out, and is respectively washed for several times using deionized water and dehydrated alcohol,
12h is dried after cleaning in 60 DEG C；
(5) diatomite after will be dry in above-mentioned (4) is heat-treated, and heat treatment temperature is 500 DEG C, and the processing time is
2h；
Embodiment 2
(1) it weighs 1g ferric acetate to be added in 100ml deionized water, then be stirred using blender transparent to solution；
(2) 10g diatomite is subjected to sour processing, the acid processing are as follows: prepare 0.1mol/L oxalic acid, diatomite is taken the photograph 80
Magnetic agitation 5h in family name's degree water-bath.
(3) by treated diatomite the is added to solution in above-mentioned (1) of acid in (2), 2h is stood, adsorbs diatomite sufficiently
Fe3+；
(4) diatomite in above-mentioned (3) is filtered out, and is respectively washed for several times using deionized water and dehydrated alcohol,
12h is dried after cleaning in 60 DEG C；
(5) diatomite after will be dry in above-mentioned (4) is heat-treated, and heat treatment temperature is 500 DEG C, and the processing time is
2h；
Embodiment 3
(1) it weighs 2g ferric acetate to be added in 100ml deionized water, then be stirred using blender transparent to solution；
(2) 10g diatomite is subjected to sour processing, the acid processing are as follows: prepare 0.1mol/L oxalic acid, diatomite is taken the photograph 80
Magnetic agitation 5h in family name's degree water-bath.
(3) by treated diatomite the is added to solution in above-mentioned (1) of acid in (2), 2h is stood, adsorbs diatomite sufficiently
Fe3+；
(4) diatomite in above-mentioned (3) is filtered out, and is respectively washed for several times using deionized water and dehydrated alcohol,
12h is dried after cleaning in 60 DEG C；
(5) diatomite after will be dry in above-mentioned (4) is heat-treated, and heat treatment temperature is 500 DEG C, and the processing time is
2h；
As shown in Figure 1, Fig. 1 is different Fe2O3The sintered optical photograph of load capacity, it can be seen that load Fe2O3Afterwards, silicon
The color of diatomaceous earth ball becomes red from canescence, and as the increase of load capacity, red are gradually deepened, this is also shown in solution
Fe concentration increases, and the load capacity of Fe increases therewith.
Fig. 2 is different Fe2O3Load capacity sample SEM photograph.
Fig. 3 is the EDS power spectrum under different loads amount, it can be seen that with the increase of acetic acid concentration of iron, Fe's in sample
Mass fraction gradually increases.(a) Fe is not detected in untreated silicon diatomaceous earth；
The content and atomic ratio of each element in table 1a untreated silicon diatomaceous earth
(b) when being loaded in the acetic acid ferrous solution of 5g/L, the mass fraction of Fe is 8.51wt% in sample after load；
After table 1b is loaded in the acetic acid ferrous solution of 5g/L in diatomite each element content and atomic ratio
(c) when being loaded in the acetic acid ferrous solution of 10g/L, the mass fraction of Fe is in sample after load
12.39wt%；
After table 1c is loaded in the acetic acid ferrous solution of 10g/L in diatomite each element content and atomic ratio
(d) when being loaded in the acetic acid ferrous solution of 20g/L, the mass fraction of Fe is in sample after load
17.83wt%.
After table 1d is loaded in the acetic acid ferrous solution of 20g/L in diatomite each element content and atomic ratio
Application examples 1
The Fe that will be prepared in embodiment 12O3Diatom soil ball catalysis material is loaded to be applied to adsorb and degrade aldehydes gas.
(1) catalyst being put into environment storehouse in a certain amount of above-described embodiment 1；
(2) 100 μ l acetaldehyde are injected into environment storehouse, make the concentration 4ppm of acetaldehyde in environment storehouse；
(3) the environment storehouse in above-mentioned (1) is carried out to dark absorption, adsorption time 2h under no light condition；
(4) light source is opened, is irradiated using visible lamp, measures the concentration of acetaldehyde in reaction warehouse at regular intervals,
It is finished until degradable.
Application examples 2
The Fe that will be prepared in embodiment 22O3Diatom soil ball catalysis material is loaded to be applied to adsorb and degrade aldehydes gas.
(1) catalyst being put into environment storehouse in a certain amount of above-described embodiment 2；
(2) 100 μ l acetaldehyde are injected into environment storehouse, make the concentration 4ppm of acetaldehyde in environment storehouse；
(3) the environment storehouse in above-mentioned (1) is carried out to dark absorption, adsorption time 2h under no light condition；
(4) light source is opened, is irradiated using visible lamp, measures the concentration of acetaldehyde in reaction warehouse at regular intervals,
It is finished until degradable.
Application examples 3
The Fe that will be prepared in embodiment 32O3Diatom soil ball catalysis material is loaded to be applied to adsorb and degrade aldehydes gas.
(1) catalyst being put into environment storehouse in a certain amount of above-described embodiment 3；
(2) 100 μ l acetaldehyde are injected into environment storehouse, make the concentration 4ppm of acetaldehyde in environment storehouse；
(3) the environment storehouse in above-mentioned (1) is carried out to dark absorption, adsorption time 2h under no light condition；
(4) light source is opened, is irradiated using visible lamp, measures the concentration of acetaldehyde in reaction warehouse at regular intervals,
It is finished until degradable.
Fig. 4 is acetaldehyde degradation curve, is adsorbed on after 30min as seen from the figure and has just reached balance, continues to extend absorption
Time, acetaldehyde concentration do not have significant change, and as seen from the figure, and the adsorption capacity of sample slightly has not under different load capacity
Together, the adsorption capacity of former diatomite is obviously weaker；In addition, ferric acetate additive amount is the sample of 1g in 210min as seen from the figure
It is interior can be complete by acetaldehyde degradation, ferric acetate additive amount be 0.5g sample just degrade completely in 480min, ferric acetate additive amount
300min is then needed for the sample of 2g.
Claims (8)
1.Fe2O3Load the preparation method of diatom soil ball catalysis material, which comprises the steps of:
(1) acetic acid iron powder is dissolved in deionized water, forms solution；
(2) by acid, treated that diatomite is added in the solution that step (1) obtains, wherein the matter of diatomite and acetic acid iron powder
Amount stands a period of time, diatomite is made sufficiently to adsorb Fe than being respectively 5~20:13+, obtain suspension；
(3) suspension in step (2) is filtered, to separate diatomite, and is cleaned, dring silicon diatomaceous earth；
(4) diatomite obtained in step (3) is heat-treated again, Fe is obtained after heat treatment2O3Load diatom soil ball light is urged
Change material.
2. Fe according to claim 12O3Load the preparation method of diatom soil ball catalysis material, which is characterized in that step
(2) acid described in processing are as follows: prepare 0.1mol/L oxalic acid, by diatomite in 80 DEG C water baths magnetic agitation 5h.
3. Fe according to claim 1 or 22O3Load the preparation method of diatom soil ball catalysis material, which is characterized in that
400~600 DEG C of heat treatment temperature in step (4), processing time are 1~3h.
4. Fe according to claim 1 or 22O3Load the preparation method of diatom soil ball catalysis material, which is characterized in that
The mass concentration of acetic acid ferrous solution obtained in step (1) is 5~20g/L.
5. Fe according to claim 1 or 22O3Load the preparation method of diatom soil ball catalysis material, which is characterized in that
Time of repose is 1~3h in step (2).
6. Fe according to claim 1 or 22O3Load the preparation method of diatom soil ball catalysis material, which is characterized in that
Step (3) drying temperature be 40~70 DEG C, the time be 12~for 24 hours.
7. Fe according to claim 1 or 22O3Load the preparation method of diatom soil ball catalysis material, which is characterized in that
Cleaning described in step (3) is to be cleaned multiple times using deionized water and dehydrated alcohol.
8. the Fe of any the method preparation of claim 1-72O3The application of diatom soil ball catalysis material is loaded, feature exists
In by the Fe2O3Load diatom soil ball catalysis material is placed in the environment storehouse full of toxic polluted gas；First by environment storehouse
In completely black dark situation, adsorption equilibrium is reached；After adsorption equilibrium, additional visible light illumination, to the polluted gas into
Row degradation；The polluted gas is acetaldehyde, 3.5~4.5ppm of concentration of acetaldehyde in the closed system；The absorption
Time is 0.5~2h.
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