CN106179363A - A kind of trace ZnO magnetic coupling photocatalytic nanometer reactor and preparation method thereof - Google Patents
A kind of trace ZnO magnetic coupling photocatalytic nanometer reactor and preparation method thereof Download PDFInfo
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- 230000001699 photocatalysis Effects 0.000 title claims abstract description 106
- 230000008878 coupling Effects 0.000 title claims abstract description 85
- 238000010168 coupling process Methods 0.000 title claims abstract description 85
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 85
- 238000002360 preparation method Methods 0.000 title claims abstract description 41
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims abstract description 50
- MYDXUJMODAZBGN-UHFFFAOYSA-N 6-bromo-5-methyl-2-methylsulfanyl-1h-[1,2,4]triazolo[1,5-a]pyrimidin-7-one Chemical compound CC1=C(Br)C(=O)N2NC(SC)=NC2=N1 MYDXUJMODAZBGN-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229960004745 danofloxacin mesylate Drugs 0.000 claims abstract description 25
- 239000003575 carbonaceous material Substances 0.000 claims abstract description 17
- 238000013033 photocatalytic degradation reaction Methods 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims description 28
- 238000013019 agitation Methods 0.000 claims description 17
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 16
- 239000002131 composite material Substances 0.000 claims description 16
- 229960000935 dehydrated alcohol Drugs 0.000 claims description 16
- 230000015556 catabolic process Effects 0.000 claims description 15
- 238000006731 degradation reaction Methods 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000012153 distilled water Substances 0.000 claims description 13
- 238000001291 vacuum drying Methods 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 11
- 238000000576 coating method Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000007146 photocatalysis Methods 0.000 claims description 8
- 238000012546 transfer Methods 0.000 claims description 8
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 7
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 239000008103 glucose Substances 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 7
- 229910017604 nitric acid Inorganic materials 0.000 claims description 7
- 230000004044 response Effects 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 5
- ZOIORXHNWRGPMV-UHFFFAOYSA-N acetic acid;zinc Chemical compound [Zn].CC(O)=O.CC(O)=O ZOIORXHNWRGPMV-UHFFFAOYSA-N 0.000 claims description 5
- 238000001354 calcination Methods 0.000 claims description 5
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 claims description 5
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 claims description 5
- GLXDVVHUTZTUQK-UHFFFAOYSA-M lithium;hydroxide;hydrate Chemical compound [Li+].O.[OH-] GLXDVVHUTZTUQK-UHFFFAOYSA-M 0.000 claims description 5
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 5
- 235000011152 sodium sulphate Nutrition 0.000 claims description 5
- 239000004246 zinc acetate Substances 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 4
- 229910052756 noble gas Inorganic materials 0.000 claims description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 238000009835 boiling Methods 0.000 claims description 3
- 229960004385 danofloxacin Drugs 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- QMLVECGLEOSESV-RYUDHWBXSA-N Danofloxacin Chemical compound C([C@@H]1C[C@H]2CN1C)N2C(C(=CC=1C(=O)C(C(O)=O)=C2)F)=CC=1N2C1CC1 QMLVECGLEOSESV-RYUDHWBXSA-N 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 claims 1
- 230000001154 acute effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 13
- 238000001179 sorption measurement Methods 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 9
- 239000000047 product Substances 0.000 description 9
- AFVFQIVMOAPDHO-UHFFFAOYSA-N Methanesulfonic acid Chemical compound CS(O)(=O)=O AFVFQIVMOAPDHO-UHFFFAOYSA-N 0.000 description 8
- 238000006552 photochemical reaction Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000004065 semiconductor Substances 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 5
- 239000011941 photocatalyst Substances 0.000 description 5
- 238000000026 X-ray photoelectron spectrum Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- MYSWGUAQZAJSOK-UHFFFAOYSA-N ciprofloxacin Chemical group C12=CC(N3CCNCC3)=C(F)C=C2C(=O)C(C(=O)O)=CN1C1CC1 MYSWGUAQZAJSOK-UHFFFAOYSA-N 0.000 description 4
- 230000004087 circulation Effects 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 229940098779 methanesulfonic acid Drugs 0.000 description 4
- 238000003980 solgel method Methods 0.000 description 4
- 239000006228 supernatant Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000004098 Tetracycline Substances 0.000 description 3
- 238000005276 aerator Methods 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000005286 illumination Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 229960002180 tetracycline Drugs 0.000 description 3
- 229930101283 tetracycline Natural products 0.000 description 3
- 235000019364 tetracycline Nutrition 0.000 description 3
- 150000003522 tetracyclines Chemical class 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 229960003405 ciprofloxacin Drugs 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
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- 238000011156 evaluation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004020 luminiscence type Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 238000000696 nitrogen adsorption--desorption isotherm Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- -1 Danofloxacin mesylates Chemical class 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 235000009392 Vitis Nutrition 0.000 description 1
- 241000219095 Vitis Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910003481 amorphous carbon Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000005447 environmental material Substances 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- 238000002173 high-resolution transmission electron microscopy Methods 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
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Classifications
-
- B01J35/39—
-
- 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
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/80—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with zinc, cadmium or mercury
-
- B01J35/615—
-
- B01J35/647—
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/40—Organic compounds containing sulfur
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
Abstract
The invention provides a kind of trace ZnO magnetic coupling photocatalytic nanometer reactor and preparation method thereof, carry out as steps described below: step 1: magnetic ring-shape Fe3O4Preparation；Step 2: the preparation of magnetic carbon material；Step 3: the preparation of trace ZnO magnetic coupling photocatalytic nanometer reactor.Trace ZnO magnetic coupling photocatalytic nanometer reactor prepared by the present invention has the highest single-minded identification and selective removal ability to photocatalytic degradation Danofloxacin mesylate.
Description
Technical field
The invention belongs to technical field of environmental material preparation, be specifically related to a kind of trace ZnO magnetic coupling photocatalytic nanometer
Reactor and preparation method thereof, and the research of selective photocatalysis degraded Danofloxacin mesylate.
Background technology
ZnO, as typical N-shaped wide bandgap semiconductor, has the advantages such as production cost is low, photoelectric properties are unique, is a kind of
Efficient conductor photocatalysis material, has been carried out in depth studying by Chinese scholars.But from reality application, commonly
ZnO reclaims difficulty, and reuse factor is low, it is impossible to selective removal specific objective thing in multi-pollutant of comforming, these shortcomings are greatly
Limit application and the development of ZnO.
Difficult for above-mentioned recovery, the problems such as reuse factor is low, we introduce magnetic material.Fe3O4As typical magnetic
Property material, has preferable magnetic and controlled pattern, also has higher stability, additionally, Fe3O4Electronics can be conducted, can
To improve light induced electron and the separation efficiency of photo-induced hole of ZnO inorganic trace photocatalyst.Therefore, first we synthesized finger
Ring-like Fe3O4And with it as carrier.But in some cases, Fe3O4It may happen that magnetic leakage phenomenon, therefore, in order to prevent magnetic
Leakage, suppresses drop and reunite, and makes ZnO can be grown in outer surface more equably, and carbon-coating (C) is introduced in ring-shape Fe3O4With
Between ZnO semiconductor layer, carbon can also conduct electronics, and it introduces the separation that will not hinder light induced electron and photo-induced hole.
Can not comform a difficult problem for selective removal specific objective thing in multi-pollutant for common ZnO, we introduce newly
Type engram technology.Novel engram technology is based on surface imprinted technology, summarizes common trace photocatalyst because of trace
The covering of layer, causes the problem that catalysis material activity reduces, sol-gel process is combined with surface imprinted technology and prepare
Novel trace ZnO magnetic coupling photocatalytic nanometer reactor, making this ZnO semiconductor layer have can be with the trace hole of Selective recognition
Cave, namely makes this ZnO semiconductor layer be provided simultaneously with the function of imprinted layer.
Therefore, first inventor is prepared for ring-shape Fe3O4And with it as carrier, then by the calcining of glucose in magnetic
Ring-shape Fe3O4Surface coating carbon-coating, combine novel engram technology finally by sol-gel process, prepare trace ZnO
Magnetic coupling photocatalytic nanometer reactor.This photocatalytic nanometer reactor not only has good Magneto separate characteristic, also has higher
Photocatalytic activity, selective removal Danofloxacin mesylate in multi-pollutant of simultaneously can also comforming.
Summary of the invention
The present invention is with hydro-thermal method and sol-gel process as preparation means, in conjunction with engram technology, prepares a kind of trace
ZnO magnetic coupling photocatalytic nanometer reactor.Have an advantage in that structure had both had high light catalysis activity, there is again preferably selection
Property, there is the photocatalytic nanometer reactor of good Magneto separate characteristic simultaneously.
The technical solution used in the present invention is:
A kind of trace ZnO magnetic coupling photocatalytic nanometer reactor, described photocatalytic nanometer reactor is referred to by nanoscale
Ring-like Fe3O4, carbon-coating and the alternative trace ZnO layer identifying Danofloxacin mesylate be composited；Described carbon-coating is coated on
Nanoscale ring-shape Fe3O4Outer surface, the described alternative trace ZnO layer identifying Danofloxacin mesylate is coated on carbon-coating
Outer surface；The methanesulfonic acid that 0.02g this trace ZnO magnetic coupling photocatalytic nanometer reactor is used for 100mL 20mg/L is reached promise
The simulated solar irradiation photocatalytic degradation of husky star solution, in 2h, degradation rate has reached 80.37%.
The preparation method of a kind of trace ZnO magnetic coupling photocatalytic nanometer reactor, is carried out as steps described below:
Step 1: magnetic ring-shape Fe3O4Preparation:
Adding distilled water in reactor, then be added thereto to disodium hydrogen phosphate, iron chloride and sodium sulfate, ultrasonic agitation is extremely
Being completely dissolved, put into by reactor and carry out constant temp. heating reaction in baking oven, take out reactor and be cooled to room temperature after reaction, washing is produced
Put it into again in vacuum drying oven after thing, transfer in tube furnace after drying, at H2Mixed gas atmosphere with noble gas
Under, both obtained magnetic ring-shape Fe after calcining3O4, standby；
Step 2: the preparation of magnetic carbon material:
Nitric acid is joined in reactor, then is added thereto to magnetic ring-shape Fe3O4, after ultrasonic agitation, add Fructus Vitis viniferae
Reactor is also put in baking oven and is carried out constant temp. heating reaction by sugar juice, takes out reactor and be cooled to room temperature after reaction, and washing is produced
Again product is put in vacuum drying oven after thing, after drying, both obtained magnetic carbon material, standby；
The preparation of step 3:ZnO magnetic coupling photocatalytic nanometer reactor:
Preparation solution A: Danofloxacin mesylate, zinc acetate, magnetic carbon material and dehydrated alcohol are joined there-necked flask
In, it is stirred vigorously to boiling, stand-by；
Preparation solution B: Lithium hydrate and dehydrated alcohol are joined in beaker and ultrasonic agitation is to being completely dissolved, stand-by；
The solution B of preparation is added dropwise in the solution A of preparation, obtains mixed liquor C, after carrying out isothermal reaction, take out
Product also washs, then is put into by product in vacuum drying oven, dries afterproduct and is designated as the ZnO magnetic composite of non-eluting；Then
In the ZnO magnetic composite of non-eluting, add distilled water, and transfer them to, in photo catalysis reactor, be passed through air,
Under constant temperature, magnetic agitation, wash after using up irradiation, then product is put in vacuum drying oven, both printed after drying
Mark ZnO magnetic coupling photocatalytic nanometer reactor.
In step 1, the amount ratio of distilled water, disodium hydrogen phosphate, iron chloride and sodium sulfate is 70mL:0.00325g:
0.216g:0.004g.
In step 1, the temperature of described reactor constant temp. heating in an oven reaction is 473K, and the response time is 48h；Product exists
Temperature in tube furnace is 623K, and calcination time is 1h, and heating rate is 5K/min, described H2Mixed gas with noble gas
It is 10% hydrogen and 90% argon.
In step 2, nitric acid, magnetic ring-shape Fe3O4It is 10mL:0.1g:60mL with the amount ratio of glucose solution, nitric acid
Concentration be 0.1mol/L, concentration 0.5mol/L of glucose solution；The time of described ultrasonic agitation is 0.5h；Reactor is drying
In case, the temperature of constant temp. heating reaction is 453K, and the response time is 6h.
In step 3, when preparing solution A, Danofloxacin mesylate, zinc acetate, magnetic carbon material and the use of dehydrated alcohol
Amount ratio is 0.05g:0.33g:0.35g:50mL；The described reaction temperature being stirred vigorously is 353K.
In step 3, when preparing solution B, the consumption of Lithium hydrate and dehydrated alcohol is 0.03g:50mL.
In step 3, when preparing mixed liquor C, the solution A used and the volume ratio of solution B are 1:1.
In step 3, the temperature of described isothermal reaction is 353K, and the response time is 5.5h；The described ZnO to non-eluting
The distilled water added in magnetic composite is 2:1 with the volume ratio of the dehydrated alcohol in described mixed liquor C；Photo catalysis reactor
Light be simulated solar irradiation, the flow velocity being passed through air in phototropic reaction device is 2mL/min, and in reactor, temperature is 303K, magnetic force
Speed of agitator is 600rpm/min, and light irradiation time is 2h.
In step 1～3, vacuum drying temperature is 313K, and drying time is 12h.
Additionally, this trace ZnO magnetic coupling photocatalytic nanometer reactor also has preferable Selective recognition/photocatalysis fall
Solution ability.
The technological merit of the present invention:
(1) the Magneto separate characteristic of trace ZnO magnetic coupling photocatalytic nanometer reactor makes the separation and recovery of sample more
Convenient, efficiently.
(2) the trace ZnO magnetic coupling photocatalytic nanometer reactor that prepared by the present invention reaches promise to photocatalytic degradation methanesulfonic acid
Sha Xing has the highest single-minded identification and selective removal ability.
(3) covering of tradition imprinted layer result in the reduction of photocatalytic activity, and in the invention, uses engram technology,
Sol-gel process is combined with surface imprinted technology and prepares trace ZnO magnetic coupling photocatalytic nanometer reactor, make this
ZnO semiconductor layer has can namely make this ZnO semiconductor layer be provided simultaneously with imprinted layer with the trace hole of Selective recognition
Function, the problem that this method can be effectively prevented from causing photocatalytic activity to reduce because of the covering of tradition imprinted layer so that institute
The trace ZnO magnetic coupling photocatalytic nanometer reactor of preparation not only has good selective removal ability, and also has relatively
High photocatalytic activity.
Accompanying drawing explanation
In Fig. 1, figure A is the XRD spectra of different sample, and middle figure B is trace ZnO magnetic coupling photocatalytic nanometer reactor
Fe 2p XPS spectrum figure, figure C is the Zn 2p XPS spectrum figure of trace ZnO magnetic coupling photocatalytic nanometer reactor, and figure D is trace
The C 1s XPS spectrum figure of ZnO magnetic coupling photocatalytic nanometer reactor, figure E is the reaction of trace ZnO magnetic coupling photocatalytic nanometer
The O 1s XPS spectrum figure of device；Wherein, the curve a in figure A is ring-shape Fe3O4, curve b is magnetic carbon material, and curve c is trace
ZnO magnetic coupling photocatalytic nanometer reactor；
In Fig. 2, a is ring-shape Fe3O4TEM figure, b be magnetic carbon material TEM figure, c is trace ZnO magnetic coupling light
The TEM figure of catalytic nanometer reactor, d is the HRTEM figure of trace ZnO magnetic coupling photocatalytic nanometer reactor, and e is non-eluting
The HADDF-STEM figure of ZnO magnetic composite；
Fig. 3 is the nitrogen adsorption-desorption isotherm of trace ZnO magnetic coupling photocatalytic nanometer reactor, and illustration is trace
The graph of pore diameter distribution of ZnO magnetic coupling photocatalytic nanometer reactor；
Fig. 4 is the outer diffuse-reflectance spectrogram of solid violet of different sample, curve a ring-shape Fe3O4, curve b is ZnO；Curve c is
Trace ZnO magnetic coupling photocatalytic nanometer reactor；
Fig. 5 is the magnetization curve of different sample, curve a ring-shape Fe3O4, curve b is trace ZnO magnetic coupling photocatalysis
Nano-reactor；
Fig. 6 is the adsorption capacity investigation figure of different photocatalyst, and curve a is ZnO, and curve b is non-trace ZnO magnetic coupling
Material, curve c is trace ZnO magnetic coupling photocatalytic nanometer reactor；
Fig. 7 is the photocatalytic activity comparison diagram of different photocatalyst, and curve a is ZnO, and curve b is that non-trace ZnO magnetic is multiple
Condensation material, curve c is trace ZnO magnetic coupling photocatalytic nanometer reactor, and d is n.s；
In Fig. 8, figure A is the luminescence generated by light spectrogram of different sample, and figure B is the photocurrent curve of different sample, in figure A, B,
Curve a is ZnO, curve b and is ZnO/ ring-shape Fe3O4, curve c is the reaction of trace ZnO magnetic coupling photocatalytic nanometer
Device；
Fig. 9 is that the degradation selectivity ability of different pollutant is investigated by different sample, and A is non-trace ZnO magnetic coupling material
Material, B is trace ZnO magnetic coupling photocatalytic nanometer reactor；A is Danofloxacin mesylate, and b is ciprofloxacin；C is Fourth Ring
Element；
In Figure 10, figure A is that under different cycle-index, the degradation rate of trace ZnO magnetic coupling photocatalytic nanometer reactor is examined
Examining, figure B is that trace ZnO magnetic coupling photocatalytic nanometer reactor is in the XRD spectra after 1 time and 5 times degraded.
Detailed description of the invention
Below in conjunction with being embodied as example, the present invention will be further described.
Adsorption activity is evaluated: carry out in DW-01 type photochemical reaction instrument (purchased from Educational Instrument Factory of Yangzhou University), but not
Open the light source, the Danofloxacin mesylate solution of 100mL 20mg/L added in reactor and measures its initial value, being subsequently adding
The sample of 0.02g, does not turns on light, stuffiness, opens magnetic agitation (rotating speed is 600rpm/min), is spaced 10min sample analysis, uses
Magnet takes the supernatant after separating and measures its concentration at ultraviolet spectrophotometer, and passes through formula: Q=(C0-C) V/m calculates it
Adsorption capacity Q, wherein C0For Danofloxacin mesylate initial concentration, Danofloxacin mesylate when C is to reach adsorption equilibrium is molten
The concentration of liquid, V is the volume of solution, and m is the quality of the sample added.
Photocatalytic activity evaluation: carry out in DW-01 type photochemical reaction instrument (purchased from Educational Instrument Factory of Yangzhou University), mould
Intend sunlight, 100mL 20mg/L Danofloxacin mesylate solution is added in reactor and measures its initial value, then
Add the sample of 0.02g, open magnetic agitation (rotating speed is 600rpm/min) and open aerator and be passed through air (flow is
2mL/min), design temperature is 303K, is spaced 20min sample analysis, takes the supernatant and exist after separating with Magnet in During Illumination
Ultraviolet spectrophotometer measures its concentration, and passes through formula: Dr=(C0-C)×100/C0Calculate its degradation rate Dr, wherein C0For
Reaching concentration after adsorption equilibrium, C is the concentration of the Danofloxacin mesylate solution that t measures, and t is the response time.
Selective evaluation: carry out in DW-01 type photochemical reaction instrument (purchased from Educational Instrument Factory of Yangzhou University), simulation is too
Sunlight irradiates, and 100mL 20mg/L tetracycline is added in reactor, is subsequently adding the sample of 0.02g, opens magnetic force and stir
Mixing (rotating speed is 600rpm/min) and open aerator and be passed through air (flow is 2mL/min), design temperature is 303K, illumination
During be spaced 20min sample analysis, take the supernatant and measure its concentration at ultraviolet spectrophotometer after separating with Magnet, and calculate
Go out its degradation rate Dr.
Estimation of stability: carry out in DW-01 type photochemical reaction instrument (purchased from Educational Instrument Factory of Yangzhou University), simulation is too
Sunlight irradiates, and is added in reactor by 100mL 20mg/L Danofloxacin mesylate solution, is subsequently adding the trace ZnO of 0.02g
Magnetic coupling photocatalytic nanometer reactor, opens magnetic agitation (rotating speed is 600rpm/min) and opens aerator and be passed through air
(flow is 2mL/min), design temperature is 303K, after illumination 120min, takes the supernatant at ultraviolet spectrometry after separating with Magnet
Its concentration of photometric determination, and calculate its degradation rate Dr, then the trace ZnO magnetic coupling photocatalytic nanometer reactor after separating
Sample carries out second time and circulates degradation experiment and calculate its degradation rate Dr, until terminating after the 5th circulation degradation experiment.
Embodiment 1:
(1) magnetic ring-shape Fe3O4Preparation: weigh in the reactor that the distilled water of 70mL joins 100mL, then to it
The middle addition disodium hydrogen phosphate of 0.00325g, the iron chloride of 0.216g and the sodium sulfate of 0.004g, ultrasonic agitation to being completely dissolved,
Aforesaid reaction vessel is put in the baking oven of 473K, after reaction 48h, take out reactor and be cooled to room temperature, using dehydrated alcohol afterwards
With distilled water rinse for several times, then product is put in vacuum drying oven, under 313K, place 12h, after drying, transfer to pipe
In formula stove, under the atmosphere of 10% hydrogen and 90% argon, arranging temperature is 623K, and heating rate is 5K/min, after calcining 1h
Product had both obtained magnetic ring-shape Fe3O4, standby.
(2) preparation of magnetic carbon material: weigh in the reactor that the nitric acid of 10mL 0.1mol/L joins 50mL, then to
Wherein add 0.1g above-mentioned magnetic ring-shape Fe3O4, after ultrasonic agitation 0.5h, add the glucose solution of 60mL 0.5mol/L
And aforesaid reaction vessel is put in the baking oven of 453K, after reaction 6h, take out reactor and be cooled to room temperature, using dehydrated alcohol afterwards
With distilled water rinse for several times, then product is put in vacuum drying oven, under 313K, place 12h, after drying, both obtained magnetic
Material with carbon element, standby.
(3) preparation of trace ZnO magnetic coupling photocatalytic nanometer reactor: preparation solution A: weigh 0.05g methanesulfonic acid and reach
Promise sand star, 0.33g zinc acetate, 0.35g magnetic carbon material and 50mL dehydrated alcohol join in the there-necked flask of 250mL,
It is stirred vigorously at a temperature of 353K to boiling, stand-by.Preparation solution B: weigh 0.03g Lithium hydrate and 50mL dehydrated alcohol adds
In the beaker of 250mL, also ultrasonic agitation is to being completely dissolved, stand-by.Afterwards at a temperature of 353K, by the solution B of preparation dropwise
Join in the solution A of preparation, take out product with dehydrated alcohol and distilled water rinse for several times after reaction 5.5h, transfer in 313K
Put the ZnO magnetic composite that 12h postscript is non-eluting.Then the ZnO magnetic composite of above-mentioned non-eluting is joined
In the distilled water of 200mL, and transferring them in the catalytic reactor of simulated solar irradiation, the flow being passed through air is 2mL/min,
Reaction temperature is 303K, and magnetic agitation rotating speed is 600rpm/min, uses dehydrated alcohol and distillation after irradiating 2h with simulated solar irradiation
Product for several times, then is put in vacuum drying oven by water rinse, places 12h, both obtained trace ZnO magnetic after drying under 313K
Composite photocatalyst nano-reactor.
(4) take sample in 0.02g (3) in photochemical reaction instrument, carry out dark adsorption test, experimental result ultraviolet spectrometry
Luminometric analysis, records this trace ZnO magnetic coupling photocatalytic nanometer reactor and exists Danofloxacin mesylate adsorption capacity
0.5h can reach 2.11mg/g when secretly adsorbing, and shows that this trace ZnO magnetic coupling photocatalytic nanometer reactor has stronger
Adsorption activity.
(5) take sample in 0.02g (3) in photochemical reaction instrument, carry out photocatalytic degradation test, experimental result ultraviolet
Spectrophotometric analysis, records the light degradation to Danofloxacin mesylate of this trace ZnO magnetic coupling photocatalytic nanometer reactor
Rate can reach 80.37% in the simulated solar irradiation of 2h irradiates, and shows this trace ZnO magnetic coupling photocatalytic nanometer reactor
There is stronger photocatalytic activity.
(6) take sample in 0.02g (3) and in photochemical reaction instrument, carry out photocatalytic degradation test, at the simulated solar of 2h
In light irradiates, record this trace ZnO magnetic coupling photocatalytic nanometer reactor and the light of Danofloxacin mesylate and tetracycline is urged
Change degradation rate.
(7) take sample in 0.02g (3) and in photochemical reaction instrument, carry out photocatalytic degradation test, at the simulated solar of 2h
Under light irradiates, circulation experiment 5 times, record every time this trace ZnO magnetic coupling photocatalytic nanometer reactor to methanesulfonic acid Da Nuosha
Star degradation rate.
Fig. 1a, it is seen that prepared ring-shape Fe3O4With standard Fe3O4Peak mate completely, ring-shape Fe is described3O4
The most successfully prepare；With ring-shape Fe3O4Peak contrast, prepared magnetic carbon material does not has significant change, illustrates to be coated with
Carbon-coating be amorphous carbon；Spectrogram pair by the spectrogram of trace ZnO magnetic coupling photocatalytic nanometer reactor Yu magnetic carbon material
Ratio, it appeared that had more three diffraction maximums in the spectrogram of trace ZnO magnetic coupling photocatalytic nanometer reactor, passes through and standard
The comparison of spectrogram, it is found that these three peak belongs to the base peak of ZnO, illustrates that trace ZnO magnetic coupling photocatalytic nanometer reacts
Device is the most successfully prepared.Additionally, it can be seen that prepared trace ZnO magnetic coupling photocatalytic nanometer from Figure 1B to Fig. 1 E
In reactor sample really containing Fe, Zn, C and O element, this also indirect proof trace ZnO magnetic coupling photocatalytic nanometer anti-
Device is answered the most successfully to prepare.
Figure it is seen that prepared Fe3O4Really is ring-shape structure, and with ring-shape Fe3O4Compare, magnetic carbon
The surface of material has one layer of clad really, illustrates that carbon-coating is the most successfully coated on ring-shape Fe3O4Surface；With magnetic carbon material
Material is compared, the surface of trace ZnO magnetic coupling photocatalytic nanometer reactor is many a lot of nano-scale particles, and this is due to cladding
Trace ZnO layer causes；From high-resolution-ration transmission electric-lens, it can be seen that prepared trace ZnO magnetic coupling photocatalytic nanometer
Reactor contains Fe really3O4, the material such as C, ZnO；In conjunction with HADDF-STEM spectrogram it can be seen that the ZnO magnetic of non-eluting is multiple
Condensation material is in addition to containing Fe, Zn, C, O element, and possibly together with F and N element, the ZnO magnetic of this non-eluting prepared by explanation is multiple
Condensation material contains Danofloxacin mesylate, the trace ZnO magnetic coupling photocatalytic nanometer reactor that this side light is prepared
Trace ZnO layer the most successfully prepare.
Fig. 3 is nitrogen adsorption-desorption isotherm and the graph of pore diameter distribution of trace ZnO magnetic coupling photocatalytic nanometer reactor
(illustration), it can be seen that isothermal line belongs to typical iv type, illustrates that trace ZnO magnetic coupling photocatalytic nanometer is anti-
Answering utensil to have meso-hole structure, and average pore size is about 2.48nm, specific surface area is about 145.01m2/g.The above results explanation print
Containing can the trace hole of Selective recognition Danofloxacin mesylate in mark ZnO magnetic coupling photocatalytic nanometer reactor.
By ZnO in Fig. 4, ring-shape Fe3O4Understand with the curve comparison of trace ZnO magnetic coupling photocatalytic nanometer reactor,
Ring-shape Fe3O4There is preferable ultraviolet light and visible absorption ability, and ZnO only has uv absorption capacity, therefore, by
In ring-shape Fe3O4Existence, trace ZnO magnetic coupling photocatalytic nanometer reactor also has preferable ultraviolet light and visible ray
Absorbability.
Fig. 5 is ring-shape Fe3O4With the magnetization curve of trace ZnO magnetic coupling photocatalytic nanometer reactor, permissible from figure
Find out, compared to ring-shape Fe3O4, due to carbon-coating and the cladding of trace ZnO layer, trace ZnO magnetic coupling photocatalytic nanometer reacts
The magnetic saturation intensity of device decreases, ring-shape Fe3O4Magnetic saturation intensity be 58.8emu/g, trace ZnO magnetic coupling light is urged
The magnetic saturation intensity changing nano-reactor is 41.48emu/g.
From Fig. 6, the adsorption curve of different samples is it can be seen that adsorbing 0.5h when, almost adsorption equilibrium,
The adsorption capacity of trace ZnO magnetic coupling photocatalytic nanometer reactor is the highest, reaches 2.11mg/g, is ZnO and non-trace respectively
1.26 times of ZnO magnetic composite and 1.35 times.This is owing to trace ZnO magnetic coupling photocatalytic nanometer reactor has energy
The trace hole of enough Selective recognition Danofloxacin mesylates causes.
The when of by the photocatalytic activity curve of samples different in Fig. 7 it can be seen that do not have catalyst, degradation rate is very
Low, illustrate that we have extraordinary catalytic effect by prepared catalyst；Compared with ZnO, non-trace ZnO magnetic composite
All increase with the photocatalytic activity of trace ZnO magnetic coupling photocatalytic nanometer reactor, the magnetic in composite is described
Material with carbon element really serves transfer electronics, improves the effect that electron-hole separates；Compared with non-trace ZnO magnetic composite,
The photocatalytic activity of trace ZnO magnetic coupling photocatalytic nanometer reactor is higher, and this explanation has can Selective recognition first sulphur
The trace hole of acid Danofloxacin contributes positively to the raising of photocatalytic activity.
Fig. 8 is luminescence generated by light spectrogram and the photocurrent curve of different sample, all it can be seen that and ZnO from both figures
With ZnO/ ring-shape Fe3O4Comparing, trace ZnO magnetic coupling photocatalytic nanometer reactor has more preferable electron-hole and separates effect
Rate, this explanation magnetic carbon material really serves transfer electronics, improves the effect of photocatalytic activity.
From fig. 9, it can be seen that the degradation rate that trace ZnO magnetic coupling photocatalytic nanometer reactor is to Danofloxacin mesylate
Will be apparently higher than non-trace ZnO magnetic composite；And for the degraded of ciprofloxacin and tetracycline, non-trace ZnO magnetic
Property composite is but apparently higher than trace ZnO magnetic coupling photocatalytic nanometer reactor；The above results shows that trace ZnO magnetic is multiple
Close photocatalytic nanometer reactor and Danofloxacin mesylate is had extraordinary selective removal ability.
From circulation experiment in Figure 10, prepared trace ZnO magnetic coupling photocatalytic nanometer reactor is 5 circulations
After experiment, still there is preferable Photocatalytic activity, and structure composition does not has significant change, and trace ZnO magnetic coupling is described
Photocatalytic nanometer reactor has preferable stability.
Claims (10)
1. a trace ZnO magnetic coupling photocatalytic nanometer reactor, it is characterised in that described photocatalytic nanometer reactor by
Nanoscale ring-shape Fe3O4, carbon-coating and the alternative trace ZnO layer identifying Danofloxacin mesylate be composited；Described carbon
Layer is coated on nanoscale ring-shape Fe3O4Outer surface, the described alternative trace ZnO layer bag identifying Danofloxacin mesylate
Overlay on the outer surface of carbon-coating；0.02g this trace ZnO magnetic coupling photocatalytic nanometer reactor is used for the first of 100mL 20mg/L
The simulated solar irradiation photocatalytic degradation of sulfonic acid Danofloxacin solution, in 2h, degradation rate has reached 80.37%.
2. a preparation method for the trace ZnO magnetic coupling photocatalytic nanometer reactor described in claim 1, its feature exists
In, carry out as steps described below:
Step 1: magnetic ring-shape Fe3O4Preparation:
Adding distilled water in reactor, then be added thereto to disodium hydrogen phosphate, iron chloride and sodium sulfate, ultrasonic agitation is to completely
Dissolve, reactor is put into baking oven carries out constant temp. heating reaction, take out reactor after reaction and be cooled to room temperature, after washed product
Put it into again in vacuum drying oven, transfer in tube furnace after drying, at H2With under the mixed gas atmosphere of noble gas, forge
Both magnetic ring-shape Fe had been obtained after burning3O4, standby；
Step 2: the preparation of magnetic carbon material:
Nitric acid is joined in reactor, then is added thereto to magnetic ring-shape Fe3O4, after ultrasonic agitation, add glucose molten
Reactor is also put in baking oven and is carried out constant temp. heating reaction by liquid, takes out reactor and be cooled to room temperature, after washed product after reaction
Again product is put in vacuum drying oven, after drying, both obtained magnetic carbon material, standby；
Step 3: the preparation of trace ZnO magnetic coupling photocatalytic nanometer reactor:
Preparation solution A: Danofloxacin mesylate, zinc acetate, magnetic carbon material and dehydrated alcohol are joined in there-necked flask, acute
Strong stirring is to boiling, stand-by；
Preparation solution B: Lithium hydrate and dehydrated alcohol are joined in beaker and ultrasonic agitation is to being completely dissolved, stand-by；
The solution B of preparation is added dropwise in the solution A of preparation, obtains mixed liquor C, after carrying out isothermal reaction, take out product
And wash, then product is put in vacuum drying oven, dry afterproduct and be designated as the ZnO magnetic composite of non-eluting；Then to not
The ZnO magnetic composite of eluting adds distilled water, and transfers them in photo catalysis reactor, be passed through air, at constant temperature
Under the conditions of, magnetic agitation, wash after using up irradiation, then product is put in vacuum drying oven, after drying, both obtained trace ZnO
Magnetic coupling photocatalytic nanometer reactor.
The preparation method of a kind of trace ZnO magnetic coupling photocatalytic nanometer reactor the most according to claim 2, its feature
Being, in step 1, the amount ratio of distilled water, disodium hydrogen phosphate, iron chloride and sodium sulfate is 70mL:0.00325g:0.216g:
0.004g。
The preparation method of a kind of trace ZnO magnetic coupling photocatalytic nanometer reactor the most according to claim 2, its feature
Being, in step 1, the temperature of described reactor constant temp. heating in an oven reaction is 473K, and the response time is 48h；Product is at pipe
Temperature in formula stove is 623K, and calcination time is 1h, and heating rate is 5K/min, described H2With the mixed gas of noble gas it is
10% hydrogen and 90% argon.
The preparation method of a kind of trace ZnO magnetic coupling photocatalytic nanometer reactor the most according to claim 2, its feature
It is, in step 2, nitric acid, magnetic ring-shape Fe3O4It is 10mL:0.1g:60mL with the amount ratio of glucose solution, nitric acid dense
Degree is 0.1mol/L, concentration 0.5mol/L of glucose solution；The time of described ultrasonic agitation is 0.5h；Reactor is in an oven
The temperature of constant temp. heating reaction is 453K, and the response time is 6h.
The preparation method of a kind of trace ZnO magnetic coupling photocatalytic nanometer reactor the most according to claim 2, its feature
It is, in step 3, when preparing solution A, Danofloxacin mesylate, zinc acetate, magnetic carbon material and the amount ratio of dehydrated alcohol
For 0.05g:0.33g:0.35g:50mL；The described reaction temperature being stirred vigorously is 353K.
The preparation method of a kind of trace ZnO magnetic coupling photocatalytic nanometer reactor the most according to claim 2, its feature
Being, in step 3, when preparing solution B, the consumption of Lithium hydrate and dehydrated alcohol is 0.03g:50mL.
The preparation method of a kind of trace ZnO magnetic coupling photocatalytic nanometer reactor the most according to claim 2, its feature
Being, in step 3, when preparing mixed liquor C, the solution A used and the volume ratio of solution B are 1:1.
The preparation method of a kind of trace ZnO magnetic coupling photocatalytic nanometer reactor the most according to claim 2, its feature
Being, in step 3, the temperature of described isothermal reaction is 353K, and the response time is 5.5h；The described ZnO magnetic to non-eluting
Property composite in the volume ratio of dehydrated alcohol in the distilled water and the described mixed liquor C that add be 2:1；Photo catalysis reactor
Light is simulated solar irradiation, and the flow velocity being passed through air in phototropic reaction device is 2mL/min, and in reactor, temperature is 303K, and magnetic force stirs
Mixing rotating speed is 600rpm/min, and light irradiation time is 2h.
The preparation method of a kind of trace ZnO magnetic coupling photocatalytic nanometer reactor the most according to claim 2, it is special
Levying and be, in step 1～3, vacuum drying temperature is 313K, and drying time is 12h.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US8158005B1 (en) * | 2007-11-02 | 2012-04-17 | University Of South Florida | Functional composites formed from colloidal polymer particles with photocatalytic metal oxide (MOx) nanoparticles |
| CN104237184A (en) * | 2014-09-05 | 2014-12-24 | 江苏大学 | ZnO-nanorod molecular-imprinted fluorescent sensor and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8158005B1 (en) * | 2007-11-02 | 2012-04-17 | University Of South Florida | Functional composites formed from colloidal polymer particles with photocatalytic metal oxide (MOx) nanoparticles |
| CN104237184A (en) * | 2014-09-05 | 2014-12-24 | 江苏大学 | ZnO-nanorod molecular-imprinted fluorescent sensor and preparation method and application thereof |
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| ZIYANG LU ET AL.: "A novel hollow capsule-like recyclable functional ZnO/C/Fe3O4 endowed with three-dimensional oriented recognition ability for selectively photodegrading danofloxacin mesylate", 《CATAL. SCI. TECHNOL.》 * |
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