CN102513141A - Photocatalyst and preparation method and application thereof - Google Patents
Photocatalyst and preparation method and application thereof Download PDFInfo
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- CN102513141A CN102513141A CN2011104074918A CN201110407491A CN102513141A CN 102513141 A CN102513141 A CN 102513141A CN 2011104074918 A CN2011104074918 A CN 2011104074918A CN 201110407491 A CN201110407491 A CN 201110407491A CN 102513141 A CN102513141 A CN 102513141A
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention discloses a photocatalyst and a preparation method and an application thereof. The photocatalyst is a mesoporous zeolite material loaded with iron ions, and the iron ions lie in the skeleton position and/or mesoporous channels of the mesoporous zeolite. The photocatalyst is prepared by using ion exchange method or insitu doping method to load the iron ions in the skeleton and/or the mesoporous channels of the mesoporous zeolite. The photocatalyst provided by the invention can efficiently decolor, degrade and mineralize organic dyes in ultraviolet lights, and can efficiently decolor, degrade and mineralize organic dyes in visible lights, thus the photocatalyst has strong applicability and has important meaning in practical application. In addition, the photocatalyst has good stability, can be recycled, and can be prepared and processed simply and practicably, thus the waste water treatment cost can be greatly reduced, the industrial requirements of scale and economy of the waste water treatment are satisfied, and the photocatalyst has significant effect and application values.
Description
Technical field
The present invention relates to a kind of photochemical catalyst; Specifically; Relate to a kind ofly not only under UV-irradiation, to have catalytic action, and can under solar light irradiation, also have the photochemical catalyst of efficient catalytic effect, belong to the catalysis material technical field.
Background technology
Along with developing rapidly of dyeing industry and textile industry, organic dyestuff has become one type of main environmental pollution thing.Because organic dyestuff basically all contains phenyl ring, have characteristics such as content height, complicated component, colourity are dark, difficult degradation, at present also without comparison effective method handle this type of waste water.Traditional dye wastewater processing method has technologies such as coagulation decoloration, adsorption bleaching, membrane technology just organic matter to be shifted, and dye molecule itself does not decompose, and cause secondary pollution easily, so these processing modes can not realize degraded truly.And biodegrading process such as present employed chemistry and biology, it is strong to have a biological selectivity, and process route is long, and operational administrative is complicated to be difficult for up to standard with the waste water of handling and aspect practical application, to have received certain restriction, also is difficult to applied.Therefore, be necessary to seek a kind of economy, handle the method that contains organic dyestuff waste water efficiently.
TiO
2It is a kind of semiconductor; Through it being applied an external energy (light; Electricity etc.) can realize its outer-shell electron orbital electron from the valence that carries the baby to the conduction band that can move freely, simultaneously in the hole that valence band stays the next one to have oxidation, the effect through this light induced electron and photohole can realize the degraded to harmful organic substance in the system; Therefore, its research as the organic matter degradation catalyst is more and more.But, present TiO
2Catalysis technique moves towards real industrial applications and still has many difficulties, comprises the selection of the energy, problems such as the load of powder body material and catalytic efficiency.
In recent years, as the light Fenton reaction of deep oxidation technology, react advantages such as simple and material cheapness because of it and receive much concern.In the wherein heterogeneous smooth Fenton reaction; Organic matter and hydrogen peroxide molecule at first are adsorbed onto catalyst surface; Hydrogen peroxide molecule produces hydroxyl free radical (OH) through the Fenton reaction then; And with organic matter generation oxidative degradation, last catabolite is diffused in the aqueous solution from the catalyst surface desorption.The hydroxyl free radical that in this reaction system, produces (OH) is a kind of high activity material, it can the oxidation industrial wastewater in most organic dyestuff materials.But above-mentioned catalyst system and catalyzing all needs the irradiation of ultraviolet light, and is very low to the utilization rate of sunshine, can not utilize sunshine well, in practical application, received very big restriction.
In sum, study and a kind ofly can be used for economy, handle the photochemical catalyst contain organic dyestuff waste water efficiently, significant and be worth.
Summary of the invention
To the problems referred to above and the demand that prior art exists, the purpose of this invention is to provide and a kind ofly can be used for economy, handle the photochemical catalyst that contains organic dyestuff waste water efficiently.
For realizing the foregoing invention purpose, the technical scheme that the present invention adopts is following:
A kind of photochemical catalyst is the mesoporous zeolite material that a kind of load has iron ion, and said iron ion is frame position and/or the mesopore orbit that is arranged in mesoporous zeolite.
Described mesoporous zeolite is preferably ZSM mesoporous zeolite, β zeolite or Y zeolite.
The preparation method of said photochemical catalyst is to adopt ion-exchange or in-situ doped method that iron ion is loaded in the skeleton and/or mesopore orbit of mesoporous zeolite.
Furtherly, adopt the technology of ion-exchange load iron ion, comprise following concrete steps: mesoporous zeolite is scattered in the aqueous solution of water-soluble inorganic molysite, carries out ion-exchange reactions repeatedly at 60～90 ℃; Ion-exchange finishes, and carries out roasting, with the inorganic salts in the system of removing.
Described water-soluble inorganic molysite is preferably ferric nitrate, ferric phosphate, ferric sulfate or iron chloride.
The molar concentration of described water-soluble inorganic molysite aqueous solution is preferably 0.1～0.4mol/L.
The mass concentration of said mesoporous zeolite in solution is preferably 0.01～0.05g/mL.
Said ion-exchange reactions recommends to carry out repeatedly 2～4 times, and be 5～10 hours each swap time.
Said sintering temperature is recommended as 550～700 ℃.
Furtherly, adopt the technology of in-situ doped method load iron ion, comprise following concrete steps: when the preparation mesoporous zeolite, the water-soluble inorganic molysite is mixed with mixed aqueous solution with silicon source, aluminium source, carries out the remaining preparation process of mesoporous zeolite then.
As further preferred version, the mol ratio of the Fe/Al in the mixed aqueous solution is 1: 1～2: 1.
Photochemical catalyst of the present invention can be applicable to contain the wastewater treatment of organic dyestuff, especially can be used for decolouring, degraded and mineralising handle the organic dyestuff in the waste water.
Furtherly, described treatment process comprises the steps: described photochemical catalyst is joined in the waste water, and the pH value of regulator solution is 5～7; Stir; Make the absorption that reaches capacity, add hydrogen peroxide solution then, under ultraviolet light or solar light irradiation, carry out catalytic reaction.
As further preferred version, it is 0.4～1.0g/L that the addition of said photochemical catalyst will make its mass concentration in waste water.
As further preferred version, the molar concentration of said hydrogen peroxide solution is preferably 0.01～0.02mol/L.
As further preferred version, it is 10～30mmol/L that the addition of said hydrogen peroxide solution will make its molar concentration in waste water.
Compared with prior art; Photochemical catalyst provided by the invention not only can be efficiently under ultraviolet light with organic dyestuff decolour, degraded and mineralising; And realized under the visible light also can efficient decolorizing, degraded and mineralising organic dyestuff, applicability is strong, this is significant in practical application.In addition, photochemical catalyst of the present invention has good stable property, reusable edible; And operation is simple for its preparation and processing; Can reduce cost for wastewater treatment greatly, scale that accord with wastewater is handled and industrial requirement economically have conspicuousness effect and using value.
Description of drawings
The XRD map of the different catalysts that Fig. 1 makes for embodiment 1, among the figure: a representes that load has the mesoporous zeolite material (Fe-MZ) of iron ion; B representes the not mesoporous zeolite material (MZ) of load iron ion; C representes commercial mesoporous zeolite material (ZSM-5);
The load that Fig. 2 makes for embodiment 1 has the ESEM picture of mesoporous zeolite material (Fe-MZ) under difference times mirror of iron ion;
The load that Fig. 3 makes for embodiment 1 has power spectrum (EDS) figure of the mesoporous zeolite material (Fe-MZ) of iron ion;
The ultraviolet-visible absorption spectroscopy map of the different catalysts that Fig. 4 makes for embodiment 1, among the figure: a representes that load has the mesoporous zeolite material (Fe-MZ) of iron ion; B representes the not mesoporous zeolite material (MZ) of load iron ion; C representes commercial mesoporous zeolite material (ZSM-5);
Adsorption rate map when the different catalysts that Fig. 5 makes for embodiment 1 reaches capacity absorption, among the figure: a representes that load has the mesoporous zeolite material (Fe-MZ) of iron ion; B representes the not mesoporous zeolite material (MZ) of load iron ion; C representes commercial mesoporous zeolite material (ZSM-5);
Degradation rate map when the mesoporous zeolite material that the load that Fig. 6 makes for embodiment 1 has an iron ion decolours to organic dyestuff under different illumination conditions fully, among the figure: a representes ultraviolet light, and b representes sunshine, and c representes unglazed photograph;
Degradation rate map when the different catalysts that Fig. 7 makes for embodiment 1 is decoloured to organic dyestuff under solar light irradiation fully, among the figure: a representes that load has the mesoporous zeolite material (Fe-MZ) of iron ion; B representes the not mesoporous zeolite material (MZ) of load iron ion; C representes commercial mesoporous zeolite material (ZSM-5);
To the mineralization rate map of organic dyestuff, among the figure: a representes ultraviolet light to the mesoporous zeolite material that the load that Fig. 8 makes for embodiment 1 has an iron ion under different illumination conditions, and b representes sunshine, and c representes unglazed photograph;
To the mineralization rate map of organic dyestuff, among the figure: a representes that load has the mesoporous zeolite material (Fe-MZ) of iron ion to the different catalysts that Fig. 9 makes for embodiment 1 under solar light irradiation; B representes the not mesoporous zeolite material (MZ) of load iron ion; C representes commercial mesoporous zeolite material (ZSM-5).
The load that Figure 10 makes for embodiment 1 has the mesoporous zeolite material of iron ion under solar light irradiation, to recycle after 3 times the mineralization rate influence to organic dyestuff, and among the figure: a representes to use for the first time, and b representes to circulate 1 time, and c representes to circulate 2 times, and d representes to circulate 3 times.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is done further explain.
Embodiment 1
One, preparation mesoporous zeolite material: MZ (Si/Al=50)
With the TPAOH (TPAOH) of 0.031moL and the aluminium isopropoxide of 0.001moL (Al (
iPrO)
3) and the ethyl orthosilicate (TEOS) of 0.05moL join in the 90mL water, stirred 2 hours being lower than 15 ℃, again at 10 ℃ of ageing 24h; Then mixed aqueous solution is joined in the aqueous solution of surfactant softex kw (CTAB) that 60mL concentration is 0.047moL/L, 10 ℃ of vigorous stirring 3 hours, ageing at room temperature was 4 hours again; Then the gel that forms is packed in the polytetrafluoroethylene (PTFE) water heating kettle, carry out hydrothermal crystallizing reaction 24h at 150 ℃, centrifugal; Washing sample; In 100 ℃ of dried overnight,, promptly get mesoporous zeolite material MZ (Si/Al=50) at last 550 ℃ of roastings 8 hours.
Two, adopt ion-exchange to prepare the mesoporous zeolite material that load has iron ion: Fe-MZ (Si/Al=50)
The 0.5g mesoporous zeolite is scattered in the iron nitrate aqueous solution that 20mL concentration is 0.4moL/L, carries out ion-exchange reactions 3 times, exchange 5 hours at every turn at 80 ℃; Ion-exchange finishes, and is centrifugal, washes 3 times; 550 ℃ of roastings 4 hours,, promptly get the mesoporous zeolite material that load has iron ion: Fe-MZ (Si/Al=50) with the nitrate in the system of removing.
The XRD map of the catalyst that Fig. 1 makes for present embodiment, among the figure: a representes that load has the mesoporous zeolite material (Fe-MZ) of iron ion; B representes the not mesoporous zeolite material (MZ) of load iron ion; C representes commercial mesoporous zeolite material (ZSM-5); Visible by Fig. 1: as not occur the diffraction maximum of the oxide of iron in the diffraction spectra of prepared mesoporous zeolite material (Fe-MZ), explain that iron is to load in the mesoporous zeolite material with ionic species.
The load that Fig. 2 makes for present embodiment has the ESEM picture of mesoporous zeolite material (Fe-MZ) under difference times mirror of iron ion; Visible by Fig. 2: the surface of prepared mesoporous zeolite material (Fe-MZ) does not have aggregate, and the iron that load is described is not to exist with oxide form.
The load that Fig. 3 makes for present embodiment has power spectrum (EDS) figure of the mesoporous zeolite material (Fe-MZ) of iron ion; Visible by Fig. 3: as to contain iron in the skeleton of prepared mesoporous zeolite material; The iron that further specifies load in conjunction with Fig. 2 is to exist with ionic species; And the iron ion of institute's load is not the surface that is present in the mesoporous zeolite material, but is dispersed in the skeleton of mesoporous zeolite material.
The ultraviolet-visible absorption spectroscopy map of the different catalysts that Fig. 4 makes for present embodiment, among the figure: a representes that load has the mesoporous zeolite material (Fe-MZ) of iron ion; B representes the not mesoporous zeolite material (MZ) of load iron ion; C representes commercial mesoporous zeolite material (ZSM-5); Visible by Fig. 4: not only there is absworption peak in the Fe-MZ of preparation in the near ultraviolet band; And the intense absorption peak is also arranged at visible region; And MZ and ZSM-5 only absworption peak occurs at ultraviolet region, and further specifying prepared load has the mesoporous zeolite material of iron ion to can be used as photochemical catalyst.
Three, detect the adsorption rate of prepared different catalysts
Get 0.5g catalyst Fe-MZ, MZ and ZSM-5 respectively, joining 3 parts of concentration respectively is 8.6 * 10
-6In the 1L solution of the indigoid dye acid blue AB74 of mol/L, the pH ≈ 6 of regulator solution then; Strong agitation under no optical condition after the absorption that reaches capacity, detects the concentration that remains acid blue AB74 in the solution with ultraviolet-visible spectrophotometer again, calculates the adsorption rate of three kinds of catalyst.
Fig. 5 is the adsorption rate map of the different catalysts that obtains, and among the figure: a representes that load has the mesoporous zeolite material (Fe-MZ) of iron ion; B representes the not mesoporous zeolite material (MZ) of load iron ion; C representes commercial mesoporous zeolite material (ZSM-5); Visible by Fig. 5: the adsorption rate of ZSM-5 is minimum, is about 10%; The adsorption rate of MZ only reaches 20%; And the adsorption rate of Fe-MZ of the present invention can reach 37%.
Four, detect under different illumination conditions Fe-MZ to the decolorizing efficiency of organic dyestuff
It is 8.6 * 10 that 0.5g catalyst Fe-MZ is joined concentration
-6In the 1L solution of the indigoid dye acid blue AB74 of mol/L, the pH ≈ 6 of regulator solution then; Strong agitation under no optical condition again, after the absorption that reaches capacity, adding concentration is the hydrogen peroxide solution 1.7mL of 20mmol/L, (ultraviolet light, sunshine and unglazed photograph) strong agitation is decoloured to solution fully under the different illumination condition respectively.
Experimental result shows: according under the condition, behind the stirring 30min, solution almost completely decolours unglazed; Under the irradiation of ultraviolet light, need 2min to decolour fully, under irradiation of sunlight, need just decolouring fully of 3min.
Five, detect degradation rate when Fe-MZ decolours to organic dyestuff fully under different illumination conditions
It is 8.6 * 10 that 0.5g catalyst Fe-MZ is joined concentration
-6In the 1L solution of the indigoid dye acid blue AB74 of mol/L, the pH ≈ 6 of regulator solution then; Strong agitation under no optical condition again; Reach capacity absorption after; Adding concentration is the hydrogen peroxide solution 1.7mL of 20mmol/L, and (ultraviolet light, sunshine and unglazed photograph) strong agitation is decoloured to solution fully under the different illumination condition respectively, centrifugalizes out catalyst fines then; Detect the concentration that remains acid blue AB74 in the solution with ultraviolet-visible spectrophotometer, calculate degradation rate.
Fig. 6 is mesoporous zeolite material that the load that obtains has the iron ion degradation rate map when under different illumination conditions, organic dyestuff being decoloured fully, and among the figure: a representes ultraviolet light, and b representes sunshine, and c representes unglazed photograph; Visible by Fig. 6: under the irradiation of ultraviolet light, when solution decolours fully (reaction 2min), the degradation rate of organic dyestuff is near 94%; Under irradiation of sunlight, when solution decolours fully (reaction 3min), the degradation rate of organic dyestuff reaches 97.8%; Under unglazed photograph, when solution decolours fully (reaction 30min), the degradation rate of organic dyestuff reaches 99%.
Degradation rate when six, detecting prepared different catalysts and under solar light irradiation, organic dyestuff decoloured fully
Get 0.5g catalyst Fe-MZ, MZ and ZSM-5 respectively, joining 3 parts of concentration respectively is 8.6 * 10
-6In the 1L solution of the indigoid dye acid blue AB74 of mol/L, the pH ≈ 6 of regulator solution then; Strong agitation under no optical condition again; Reach capacity absorption after; Adding concentration is the hydrogen peroxide solution 1.7mL of 20mmol/L, and strong agitation is decoloured to solution fully under irradiation of sunlight respectively, centrifugalizes out catalyst fines then; Detect the concentration that remains acid blue AB74 in the solution with ultraviolet-visible spectrophotometer, calculate degradation rate.
Fig. 7 is the different catalysts that the obtains degradation rate map when under solar light irradiation, organic dyestuff being decoloured fully, and among the figure: a representes that load has the mesoporous zeolite material (Fe-MZ) of iron ion; B representes the not mesoporous zeolite material (MZ) of load iron ion; C representes commercial mesoporous zeolite material (ZSM-5); Visible by Fig. 7: under solar light irradiation, the ZSM-5 catalyst need stir 150min just can make solution decolour fully, and the degradation rate to organic dyestuff during decolouring is 97%; The MZ catalyst need stir 40min just can make solution decolour fully, and the degradation rate to organic dyestuff during decolouring also is 97%; And the Fe-MZ catalyst only need stir 3min solution is decoloured fully, during decolouring to the degradation rate of organic dyestuff near 98%.
Seven, detect under different illumination conditions Fe-MZ to the mineralization rate of organic dyestuff
It is 8.6 * 10 that 0.5g catalyst Fe-MZ is joined concentration
-6In the 1L solution of the indigoid dye acid blue AB74 of mol/L, the pH ≈ 6 of regulator solution then; Strong agitation under no optical condition again; Reach capacity after the absorption, adding concentration is the hydrogen peroxide solution 1.7mL of 20mmol/L, respectively (ultraviolet light, sunshine and unglazed photograph) strong agitation under the different illumination condition; Whenever at a distance from sampling in 0.5 hour; Centrifugalize out catalyst fines wherein, detect the concentration of acid blue AB74 total organic carbon in the surplus solution then with the TOC analyzer, calculate Fe-MZ catalyst mineralization rate to organic dyestuff under different illumination conditions.
Fig. 8 be the load that obtains iron ion arranged the mesoporous zeolite material under different illumination conditions to the mineralization rate map of organic dyestuff, among the figure: a representes ultraviolet light, b representes sunshine, c representes unglazed photograph; Visible by Fig. 8: after catalytic reaction 2 hours; Fe-MZ catalyst of the present invention all has very high mineralization rate to organic dyestuff under ultraviolet light and irradiation of sunlight; Reach 79.3% and 75.4% respectively; Even under unglazed photograph, Fe-MZ catalyst of the present invention also can reach 67.7% to the mineralization rate of organic dyestuff.
Eight, detect obtained different catalysts mineralization rate to organic dyestuff under solar light irradiation
Get 0.5g catalyst Fe-MZ, MZ and ZSM-5 respectively, joining 3 parts of concentration respectively is 8.6 * 10
-6In the 1L solution of the indigoid dye acid blue AB74 of mol/L, the pH ≈ 6 of regulator solution then; Strong agitation under no optical condition again; Reach capacity after the absorption, adding concentration is the hydrogen peroxide solution 1.7mL of 20mmol/L, respectively strong agitation under irradiation of sunlight; Whenever at a distance from sampling in 0.5 hour; Centrifugalize out catalyst fines wherein, detect the concentration of acid blue AB74 total organic carbon in the surplus solution then with the TOC analyzer, calculate different catalysts mineralization rate to organic dyestuff under solar light irradiation.
Fig. 9 be the different catalysts that obtains under solar light irradiation to the mineralization rate map of organic dyestuff, among the figure: a representes that load has the mesoporous zeolite material (Fe-MZ) of iron ion; B representes the not mesoporous zeolite material (MZ) of load iron ion; C representes commercial mesoporous zeolite material (ZSM-5); Visible by Fig. 9: after catalytic reaction 2 hours; Catalyst MZ and ZSM-5 are under irradiation of sunlight; Mineralization rate to organic dyestuff can only reach 39.4% and 32.8%, and Fe-MZ catalyst of the present invention is under irradiation of sunlight, can reach 75.4% to the mineralization rate of organic dyestuff.
Nine, the performance of examination Fe-MZ catalyst circulation use
It is 8.6 * 10 that 0.5g catalyst Fe-MZ is joined concentration
-6In the 1L solution of the indigoid dye acid blue AB74 of mol/L, the pH ≈ 6 of regulator solution then; Strong agitation under no optical condition again; Reach capacity absorption after; Adding concentration is the hydrogen peroxide solution 1.7mL of 20mmol/L; Strong agitation is 2 hours under irradiation of sunlight, centrifugalizes out catalyst fines wherein, detects the concentration of acid blue AB74 total organic carbon in the surplus solution with the TOC analyzer; Then with the Fe-MZ catalyst fines of separating after 120 ℃ of dryings, repeat above-mentioned experiment; Examine or check catalyst Fe-MZ of the present invention and recycle after 3 times mineralization rate influence organic dyestuff.
Figure 10 is that the load that obtains has the mesoporous zeolite material of iron ion to recycle under solar light irradiation that the mineralization rate to organic dyestuff influences figure after 3 times, and among the figure: a representes to use for the first time, and b representes to circulate 1 time, and c representes to circulate 2 times, and d representes to circulate 3 times; Visible by Figure 10: catalyst of the present invention is after recycling 3 times, and is very little to the mineralization rate influence of organic dyestuff, still can reach 68%, has good catalytic activity and catalytic life.
Embodiment 2
Adopt in-situ doped legal system to be equipped with the mesoporous zeolite material that load has iron ion: Fe-MZ (Si/Al=50)
Ferric nitrate (Fe (NO with 0.1moL
3)
39H
2O) and the aluminium isopropoxide of 0.001moL (Al (
iPrO)
3) and the ethyl orthosilicate (TEOS) of 0.05moL join in the 60mL water, be mixed with mixed aqueous solution; Add the TPAOH that concentration is 1.03moL/L (TPAOH) aqueous solution 30mL then, stirred 2 hours at 5 ℃, again at 5 ℃ of ageing 24h; Join 60mL concentration again and be in the aqueous solution of surfactant softex kw (CTAB) of 0.047moL/L, 5 ℃ of vigorous stirring 3 hours, ageing at room temperature was 4 hours again; Then the gel that forms is packed in the polytetrafluoroethylene (PTFE) water heating kettle, carry out hydrothermal crystallizing reaction 20h at 160 ℃, centrifugal; Washing sample; In 100 ℃ of dried overnight,, promptly get the mesoporous zeolite material that load has iron ion: Fe-MZ (Si/Al=50) at last 600 ℃ of roastings 8 hours.
Visible in sum, photochemical catalyst provided by the invention not only can be efficiently under ultraviolet light with organic dyestuff decolour, degraded and mineralising, and realized under the visible light also can efficient decolorizing, degraded and mineralising organic dyestuff, applicability is strong.In addition, photochemical catalyst of the present invention has good stable property, reusable edible, and its preparation and handle that operation is simple, and scale of can accord with wastewater handling and industrial requirement economically have conspicuousness effect and using value.
Be necessary at last to be pointed out that at this: above embodiment only is used for technical scheme of the present invention is done further explain; Can not be interpreted as the restriction to protection domain of the present invention, some nonessential improvement that those skilled in the art's foregoing according to the present invention is made and adjustment all belong to protection scope of the present invention.
Claims (17)
1. a photochemical catalyst is characterized in that: be the mesoporous zeolite material that a kind of load has iron ion, and said iron ion is frame position and/or the mesopore orbit that is arranged in mesoporous zeolite.
2. photochemical catalyst according to claim 1 is characterized in that: described mesoporous zeolite is ZSM mesoporous zeolite, β zeolite or Y zeolite.
3. the preparation method of the described photochemical catalyst of claim 1 is characterized in that: adopt ion-exchange or in-situ doped method that iron ion is loaded in the skeleton and/or mesopore orbit of mesoporous zeolite.
4. the preparation method of photochemical catalyst according to claim 3; It is characterized in that; Adopt the technology of ion-exchange load iron ion, comprise following concrete steps: mesoporous zeolite is scattered in the aqueous solution of water-soluble inorganic molysite, carries out ion-exchange reactions repeatedly at 60～90 ℃; Ion-exchange finishes, and carries out roasting, with the inorganic salts in the system of removing.
5. the preparation method of photochemical catalyst according to claim 4, it is characterized in that: described water-soluble inorganic molysite is ferric nitrate, ferric phosphate, ferric sulfate or iron chloride.
6. the preparation method of photochemical catalyst according to claim 4, it is characterized in that: the molar concentration of described water-soluble inorganic molysite aqueous solution is 0.1～0.4mol/L.
7. the preparation method of photochemical catalyst according to claim 4, it is characterized in that: the mass concentration of said mesoporous zeolite in solution is 0.01～0.05g/mL.
8. the preparation method of photochemical catalyst according to claim 4, it is characterized in that: said ion-exchange reactions is carried out 2～4 times repeatedly, and be 5～10 hours each swap time.
9. the preparation method of photochemical catalyst according to claim 4, it is characterized in that: said sintering temperature is 550～700 ℃.
10. the preparation method of photochemical catalyst according to claim 3; It is characterized in that; Adopt the technology of in-situ doped method load iron ion; Comprise following concrete steps: when the preparation mesoporous zeolite, the water-soluble inorganic molysite is mixed with mixed aqueous solution with silicon source, aluminium source, carries out the remaining preparation process of mesoporous zeolite then.
11. the preparation method of photochemical catalyst according to claim 10 is characterized in that: the mol ratio of the Fe/Al in the mixed aqueous solution is 1: 1～2: 1.
12. the application of the described photochemical catalyst of claim 1 is characterized in that: be used to contain the wastewater treatment of organic dyestuff.
13. the application of photochemical catalyst according to claim 12 is characterized in that: the organic dyestuff of be used for decolouring, degraded and mineralising being handled waste water.
14. the application of photochemical catalyst according to claim 12; It is characterized in that treatment process comprises the steps: described photochemical catalyst is joined in the waste water, the pH value of regulator solution is 5～7; Stir; Make the absorption that reaches capacity, add hydrogen peroxide solution then, under ultraviolet light or solar light irradiation, carry out catalytic reaction.
15. the application of photochemical catalyst according to claim 14 is characterized in that: it is 0.4～1.0g/L that the addition of said photochemical catalyst will make its mass concentration in waste water.
16. the application of photochemical catalyst according to claim 14 is characterized in that: the molar concentration of said hydrogen peroxide solution is 0.01～0.02mol/L.
17. the application of photochemical catalyst according to claim 14 is characterized in that: it is 10～30mmol/L that the addition of said hydrogen peroxide solution will make its molar concentration in waste water.
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| CN103043772A (en) * | 2012-12-19 | 2013-04-17 | 浙江大学 | Method for selectively carrying out catalytic conversion on monocyclic aromatic in water to obtain small molecule acid |
| CN103191770A (en) * | 2013-03-22 | 2013-07-10 | 华南理工大学 | Ferrum-containing mesoporous molecular sieve catalyst and application of Ferrum-containing mesoporous molecular sieve catalyst in catalytic degradation of ionic liquid |
| CN106179460A (en) * | 2016-07-06 | 2016-12-07 | 上海应用技术学院 | A kind of nanometer CuO/TiO2the preparation method of/Fe modified zeolite composite photo-catalyst |
| CN108772081A (en) * | 2018-07-12 | 2018-11-09 | 武汉工程大学 | A kind of method FePO4 heterogeneous visible light Fenton catalyst and handle organic wastewater |
| CN108892196A (en) * | 2018-07-09 | 2018-11-27 | 沈阳理工大学 | A kind of preparation method of water-purifying material |
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| CN103191770B (en) * | 2013-03-22 | 2015-06-03 | 华南理工大学 | Ferrum-containing mesoporous molecular sieve catalyst and application of Ferrum-containing mesoporous molecular sieve catalyst in catalytic degradation of ionic liquid |
| CN106179460A (en) * | 2016-07-06 | 2016-12-07 | 上海应用技术学院 | A kind of nanometer CuO/TiO2the preparation method of/Fe modified zeolite composite photo-catalyst |
| CN108892196A (en) * | 2018-07-09 | 2018-11-27 | 沈阳理工大学 | A kind of preparation method of water-purifying material |
| CN108892196B (en) * | 2018-07-09 | 2020-12-29 | 沈阳理工大学 | Preparation method of water purification material |
| CN108772081A (en) * | 2018-07-12 | 2018-11-09 | 武汉工程大学 | A kind of method FePO4 heterogeneous visible light Fenton catalyst and handle organic wastewater |
| CN108772081B (en) * | 2018-07-12 | 2021-01-29 | 武汉工程大学 | FePO4 heterogeneous visible light Fenton catalyst and method for treating organic wastewater |
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