CN110090652A - A method of it preparing chlorine four and aoxidizes three bismuths/strontium ferrite composite magnetic catalysis material - Google Patents
A method of it preparing chlorine four and aoxidizes three bismuths/strontium ferrite composite magnetic catalysis material Download PDFInfo
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- 239000000460 chlorine Substances 0.000 title claims abstract description 77
- 239000002131 composite material Substances 0.000 title claims abstract description 41
- 239000000463 material Substances 0.000 title claims abstract description 32
- 238000006555 catalytic reaction Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 23
- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 19
- 229910052712 strontium Inorganic materials 0.000 title claims abstract description 18
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 title claims abstract description 18
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 229910052801 chlorine Inorganic materials 0.000 title claims abstract description 11
- 229910002402 SrFe12O19 Inorganic materials 0.000 claims abstract description 65
- 238000002360 preparation method Methods 0.000 claims abstract description 32
- 239000003054 catalyst Substances 0.000 claims abstract description 23
- 238000000227 grinding Methods 0.000 claims abstract description 9
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims description 21
- 239000000243 solution Substances 0.000 claims description 20
- 239000000725 suspension Substances 0.000 claims description 20
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 15
- 239000012153 distilled water Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 12
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- 238000000967 suction filtration Methods 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 238000010907 mechanical stirring Methods 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 5
- 239000011780 sodium chloride Substances 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 4
- 101100496858 Mus musculus Colec12 gene Proteins 0.000 claims description 3
- 238000013019 agitation Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 2
- 239000011159 matrix material Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims 1
- 230000001699 photocatalysis Effects 0.000 abstract description 14
- 230000015556 catabolic process Effects 0.000 abstract description 11
- 238000006731 degradation reaction Methods 0.000 abstract description 11
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 abstract description 9
- 229940043267 rhodamine b Drugs 0.000 abstract description 9
- 238000007146 photocatalysis Methods 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000011084 recovery Methods 0.000 abstract description 5
- 238000005286 illumination Methods 0.000 abstract description 3
- 229910052724 xenon Inorganic materials 0.000 abstract description 3
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000356 contaminant Substances 0.000 abstract 1
- 238000005297 material degradation process Methods 0.000 abstract 1
- 238000004064 recycling Methods 0.000 description 8
- 238000005303 weighing Methods 0.000 description 8
- 239000011941 photocatalyst Substances 0.000 description 7
- 238000001228 spectrum Methods 0.000 description 5
- 229910021607 Silver chloride Inorganic materials 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052797 bismuth Inorganic materials 0.000 description 2
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 241000446313 Lamella Species 0.000 description 1
- DPSWNBLFKLUQTP-UHFFFAOYSA-N bismuth vanadium Chemical compound [V].[Bi] DPSWNBLFKLUQTP-UHFFFAOYSA-N 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000005686 electrostatic field Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- CXKWCBBOMKCUKX-UHFFFAOYSA-M methylene blue Chemical compound [Cl-].C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 CXKWCBBOMKCUKX-UHFFFAOYSA-M 0.000 description 1
- 229960000907 methylthioninium chloride Drugs 0.000 description 1
- 238000000593 microemulsion method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003471 mutagenic agent Substances 0.000 description 1
- 231100000707 mutagenic chemical Toxicity 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- BWOROQSFKKODDR-UHFFFAOYSA-N oxobismuth;hydrochloride Chemical compound Cl.[Bi]=O BWOROQSFKKODDR-UHFFFAOYSA-N 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000001338 self-assembly Methods 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/06—Halogens; Compounds thereof
- B01J27/128—Halogens; Compounds thereof with iron group metals or platinum group metals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01J35/00—Catalysts, in general, characterised by their form or physical properties
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- 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
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Abstract
A method of it preparing chlorine four and aoxidizes three bismuths/strontium ferrite composite magnetic catalysis material, belong to inorganic catalysis material technical field.The present invention is first prepared for retentive material strontium ferrite SrFe with hydro-thermal method12O19, then chlorine four has been prepared by hydro-thermal-roasting method and has aoxidized three bismuths/strontium ferrite Bi3O4Cl/SrFe12O19Composite magnetic catalysis material finally obtains magnetic photocatalytic material sample by dry and grinding.The method of the present invention preparation process is simple, few using equipment, low energy consumption.The Bi of preparation3O4Cl/SrFe12O19The magnetic property of composite magnetic catalysis material is stable, photocatalytic activity is high, under the irradiation of simulated solar irradiation xenon lamp, the rhodamine B solution for being 10mg/L with 0.1g composite magnetic catalysis material degradation 100mL concentration, illumination 60min reaches 97.3% to the degradation rate of rhodamine B, it is 92.4% to the magnetic rate of recovery of photochemical catalyst under externally-applied magnetic field, is 95.7% to the degradation rate of rhodamine B after reusing 3 times.The product that the present invention prepares can be widely used for photocatalysis degradation organic contaminant field.
Description
Technical field
The present invention relates to a kind of chlorine four for preparing to aoxidize three bismuths/strontium ferrite (Bi3O4Cl/SrFe12O19) composite magnetic light urges
The method for changing material, belongs to inorganic catalysis material technical field.
Background technique
Chlorine four aoxidizes three bismuth (Bi3O4Cl) as novel nano-photocatalyst, belong to the conductor photocatalysis material of stratiform
Material, due to its excellent electrical properties, suitable position of energy band and efficient photocatalytic activity, in degradable organic pollutant side
Face has received widespread attention.Bi3O4For Cl as bismuth-based oxide, structure is by [Cl] sheath and is clipped between two [Cl] layers
[Bi3O4] layer composition, this unique structure can guarantee the foundation of therein electrostatic field, to promote photo-generated carrier
Separation and transport.Bi3O4The preparation method of Cl mainly has hydro-thermal method, coprecipitation and roasting method etc..Common photochemical catalyst exists
Can be dispersed in liquid in reaction system, it is difficult to separation and recycling and reusing, thus constrain photochemical catalyst popularization and
Using.Physiochemical mutagens and the recycling of catalyst may be implemented in composite magnetic catalysis material under the action of externally-applied magnetic field,
The shortcomings that energy consumption is high, low efficiency to overcoming conventional filtration way of recycling.
Strontium ferrite (SrFe12O19) belong to magneto-plumbite type ferrite, it is hexaplanar, there is high saturation and magnetic intensity, height
Magnetic conductivity, low-loss, steady performance.Therefore with SrFe12O19For the composite magnetic catalysis material of magnetic matrix preparation
With stable magnetism, be conducive to the recycling and recycling of catalyst.Common SrFe12O19Preparation method includes that chemistry is total
The precipitation method, molten-salt growth method, hydro-thermal method, microemulsion method, self-assembly method, self-propagating high-temperature synthesis and sol-gel method etc..
Currently, to Bi3O4The research of Cl, which is mainly concentrated in, improves its photocatalytic activity aspect, and studies and how to prepare
Bi3O4The report of the composite magnetic photochemical catalyst of Cl is less.As in " Catalysis Communications " 2016 volume 76
" Synthesis of AgCl/Bi3O4Cl composite and its photocatalytic activity in RhB
Degradation under visible light " (documents 1) prepares pure Bi using roasting method3O4Then Cl is used again
Hydro-thermal method prepares AgCl/Bi3O4Cl composite photo-catalyst.The disadvantage of this method is that: (1) Bi3O4Cl is by making in advance
The Bi got ready2O3High-temperature roasting 6h is made at 700 DEG C with BiOCl, and preparation process is complicated, energy consumption is high, at high cost；(2) it prepares
Bi3O4Cl and compound AgCl/Bi3O4Cl catalytic activity is not high, and 60min is respectively 69.9% He to the degradation rate of rhodamine B
94.4%；(3) photochemical catalyst is difficult to realize recycling and reusing, and operating cost is higher, easily leads to secondary pollution.
For another example patent of invention " a kind of preparation method of the composite bismuth vanadium photocatalyst of strontium ferrite load " (publication number:
CN103480384A) (documents 2) prepare strontium ferrite with roasting method, then using impregnation-calcination method prepare strontium ferrite/
Pucherite composite magnetic photochemical catalyst.The disadvantage of this method is that: (1) strontium ferrite be 800~1000 DEG C roast 2~
4h is made, and energy consumption is high；(2) the photocatalysis stability of the composite magnetic photochemical catalyst of this method preparation is poor, and light after the recovery is urged
Agent is reduced to 60% by 93% to the degradation rate of methylene blue in 5h.
Summary of the invention
The purpose of the present invention is be directed to Bi3O4Cl is difficult to the problem of recycling, and proposes a kind of Bi3O4Cl/SrFe12O19It is multiple
The preparation method of magnetic photocatalyst is closed, preparation method is simple, at low cost.The Bi of preparation3O4Cl/SrFe12O19Composite magnetic light
Catalyst photocatalysis efficiency with higher under simulated solar irradiation irradiation, and convenient for being divided from liquid-phase system by externally-applied magnetic field
From and recycling, catalyst after the recovery photocatalytic activity still with higher.Both simple and efficient realizes resource again to this method
It utilizes, in turn avoids the possible secondary pollution of catalyst.
Bi of the present invention3O4Cl/SrFe12O19The preparation method is as follows:
(1)SrFe12O19Preparation
SrFe is prepared using hydro-thermal method12O19, the FeCl of 2.1624g is weighed respectively3·6H2The SrCl of O and 0.2666g2·
6H2O adds 20mL distilled water in beaker, and sonic oscillation makes it dissolve to obtain mixed solution；Under magnetic agitation effect,
To the certain density NaOH solution of mixed solution and dripping, the pH for adjusting solution is 10, continues to stir 10min；After stirring
Solution is transferred in the reaction kettle of 100mL, is reacted at 200 DEG C for 24 hours, cooling after the reaction was completed, filter, respectively with distilled water and
Dust technology washs 5 times, dries at 80 DEG C for 24 hours, and finally grinding obtains SrFe12O19。
(2)Bi3O4Cl/SrFe12O19The preparation of composite magnetic catalysis material
Weigh the Bi (NO of 0.97g3)3·5H2O is added in the ethylene glycol of 20mL, and suspension A is obtained after ultrasonic 10min,
The NaCl for weighing 0.039g is dissolved in the distilled water of 50mL, obtains solution B after stirring 5min；Under the action of mechanical stirring,
Solution B is added dropwise in suspension A, continues to stir 10min after dripping, obtains suspension C；Weighing mass fraction is
15%~25% SrFe12O19It being added in suspension C, stirring is transferred to after ten minutes in the reaction kettle liner of 100mL, and 160
Hydro-thermal reaction 12h obtains Bi at DEG C3O4Cl/SrFe12O19The presoma of photochemical catalyst；Cooling at room temperature, suction filtration, is washed with distillation
It washs 5 times, and dry 12h at 80 DEG C；It will be put into 100mL ceramic crucible after drying sample grinding, is placed in Muffle furnace, at 500 DEG C
2h is roasted, Bi is obtained3O4Cl/SrFe12O19Composite magnetic catalysis material.
The present invention by adopting the above technical scheme, mainly has the following effects:
(1) Bi of the method for the present invention preparation3O4Cl/SrFe12O19The photocatalysis with higher of composite magnetic photochemical catalyst is living
Property, under the irradiation of simulated solar irradiation xenon lamp, 0.1g composite magnetic photochemical catalyst Bi3O4Cl/SrFe12O19Handling 100mL concentration is
The rhodamine B solution of 10mg/L reaches 97.3% to the degradation rate of rhodamine B after illumination 60min and (prepares better than documents 1
AgCl/Bi3O4Cl composite photo-catalyst).
(2) Bi of the method for the present invention preparation3O4Cl/SrFe12O19Composite magnetic photochemical catalyst is under the action of an external magnetic field
The degradation rate that the rate of recovery is up to after reusing 92.4%, and 3 times still reaches 95.7%.
(3) Bi of the method for the present invention preparation3O4Cl/SrFe12O19Composite magnetic photochemical catalyst, specific surface area 6.11m2/
G, preparation manipulation is simple, and required equipment is few, and low energy consumption.
Detailed description of the invention
Fig. 1 is Bi3O4Cl、SrFe12O19And Bi3O4Cl/SrFe12O19X ray diffracting spectrum (XRD).
Fig. 2 is Bi3O4Cl、SrFe12O19And Bi3O4Cl/SrFe12O19Scanning electron microscope (SEM) photograph (SEM).
Fig. 3 is SrFe12O19And Bi3O4Cl/SrFe12O19Magnetic hysteresis return line chart.
Specific embodiment
With reference to embodiment, the present invention is further illustrated.
Embodiment 1
It is a kind of to prepare Bi3O4Cl/SrFe12O19The preparation of composite magnetic catalysis material, the specific steps are as follows:
(1)SrFe12O19Preparation
SrFe is prepared using hydro-thermal method12O19, the FeCl of 2.1624g is weighed respectively3·6H2The SrCl of O and 0.2666g2·
6H2O adds 20mL distilled water in beaker, and sonic oscillation makes it dissolve to obtain mixed solution；Under magnetic agitation effect,
To the certain density NaOH solution of mixed solution and dripping, the pH for adjusting solution is 10, continues to stir 10min；After stirring
Solution is transferred in the reaction kettle of 100mL, is reacted at 200 DEG C for 24 hours, cooling after the reaction was completed, filter, respectively with distilled water and
Dust technology washs 5 times, dries at 80 DEG C, and finally grinding obtains SrFe12O19。
(2)Bi3O4Cl/SrFe12O19The preparation of composite magnetic catalysis material
Weigh the Bi (NO of 0.97g3)3·5H2O is added in the ethylene glycol of 20mL, and suspension A is obtained after ultrasonic 10min,
The NaCl for weighing 0.039g is dissolved in the distilled water of 50mL, obtains solution B after stirring 5min；Under the action of mechanical stirring,
Solution B is added dropwise in suspension A, continues to stir 10min after dripping, obtains suspension C；Weighing mass fraction is
15% SrFe12O19It is added in suspension C, stirring is transferred to after ten minutes in the reaction kettle liner of 100mL, and 160 DEG C are lauched
Thermal response 12h obtains Bi3O4Cl/SrFe12O19The presoma of photochemical catalyst；Cooling at room temperature, suction filtration, is washed with distilled water 5 times,
And 12h is dried at 80 DEG C；It will be put into 100mL ceramic crucible after drying sample grinding, be placed in Muffle furnace, in 500 DEG C of roasting 2h,
Obtain Bi3O4Cl/SrFe12O19Composite magnetic catalysis material.
Embodiment 2
It is a kind of to prepare Bi3O4Cl/SrFe12O19The preparation of composite magnetic catalysis material, the specific steps are as follows:
(1)SrFe12O19Preparation
With (1) in embodiment 1.
(2)Bi3O4Cl/SrFe12O19The preparation of composite magnetic catalysis material
Weigh the Bi (NO of 0.97g3)3·5H2O is added in the ethylene glycol of 20mL, and suspension A is obtained after ultrasonic 10min,
The NaCl for weighing 0.039g is dissolved in the distilled water of 50mL, obtains solution B after stirring 5min；Under the action of mechanical stirring,
Solution B is added dropwise in suspension A, continues to stir 10min after dripping, obtains suspension C；Weighing mass fraction is
20% SrFe12O19It is added in suspension C, stirring is transferred to after ten minutes in the reaction kettle liner of 100mL, and 160 DEG C are lauched
Thermal response 12h obtains Bi3O4Cl/SrFe12O19The presoma of photochemical catalyst；Cooling at room temperature, suction filtration, is washed with distilled water 5 times,
And 12h is dried at 80 DEG C；It will be put into 100mL ceramic crucible after drying sample grinding, be placed in Muffle furnace, in 500 DEG C of roasting 2h,
Obtain Bi3O4Cl/SrFe12O19Composite magnetic catalysis material.
Embodiment 3
It is a kind of to prepare Bi3O4Cl/SrFe12O19The preparation of composite magnetic catalysis material, the specific steps are as follows:
(1)SrFe12O19Preparation
With (1) in embodiment 1.
(2)Bi3O4Cl/SrFe12O19The preparation of composite magnetic catalysis material
Weigh the Bi (NO of 0.97g3)3·5H2O is added in the ethylene glycol of 20mL, and suspension A is obtained after ultrasonic 10min,
The NaCl for weighing 0.039g is dissolved in the distilled water of 50mL, obtains solution B after stirring 5min；Under the action of mechanical stirring,
Solution B is added dropwise in suspension A, continues to stir 10min after dripping, obtains suspension C；Weighing mass fraction is
25% SrFe12O19It is added in suspension C, stirring is transferred to after ten minutes in the reaction kettle liner of 100mL, and 160 DEG C are lauched
Thermal response 12h obtains Bi3O4Cl/SrFe12O19The presoma of photochemical catalyst；Cooling at room temperature, suction filtration, is washed with distilled water 5 times,
And 12h is dried at 80 DEG C；It will be put into 100mL ceramic crucible after drying sample grinding, be placed in Muffle furnace, in 500 DEG C of roasting 2h,
Obtain Bi3O4Cl/SrFe12O19Composite magnetic catalysis material.
Experimental result
Bi prepared by embodiment 23O4Cl/SrFe12O19Catalytic degradation activity of the composite magnetic catalysis material to rhodamine B
Most preferably.In order to facilitate comparison, it is prepared for Bi3O4Cl sample.Bi3O4Cl preparation method is to be added without in 2 step of embodiment (2)
SrFe12O19。
Bi3O4Shown in the XRD spectrum of Cl such as Fig. 1 (a), all diffraction maximums energy index turns to the Bi of monoclinic system in figure3O4Cl
(JCPDS No.:36-0760), shows successfully to prepare Bi3O4Cl crystal；SrFe12O19XRD spectrum such as Fig. 1 (b) shown in, figure
In all diffraction maximums can index turn to the SrFe of hexagon12O19(JCPDS No.:33-1340) shows successfully to prepare
SrFe12O19Crystal；Bi3O4Cl/SrFe12O19XRD spectrum such as Fig. 1 (c) shown in, with pure Bi3O4The XRD spectrum of Cl compares hair
It is existing, Bi3O4Cl/SrFe12O19Main diffraction peak and Bi3O4Cl is almost the same, but the diffraction maximum hair at 28.78 ° and 29.13 °
Raw obvious decrease, shows SrFe12O19It is compound to Bi3O4The preference direction of growth and crystal structure of Cl crystal have certain shadow
It rings；There is SrFe at 33.15 ° simultaneously12O19Diffraction maximum, shows and SrFe12O19With Bi3O4Cl success is compound.
Bi3O4The SEM figure of Cl is as shown in Fig. 2 (a), it can be seen that Bi3O4Cl is made of nanometer sheet in irregular shape, is not had
There is other impurities appearance；SrFe12O19SEM figure as shown in Fig. 2 (b), it can be seen that SrFe12O19For hexagon sheet, without it
He occurs impurity；Bi3O4Cl/SrFe12O19SEM figure as shown in Fig. 2 (c), it can be seen that prepared Bi3O4Cl nanometer sheet is not
Regularly it is supported on SrFe12O19On hexagon lamella, show successfully to prepare Bi3O4Cl/SrFe12O19Composite magnetic photocatalysis
Agent.
SrFe12O19Magnetic parameter such as Fig. 3 (a) shown in, saturation magnetization 32.03emu/g, coercivity is
941.24Oe shows that material is retentive material；Bi3O4Cl/SrFe12O19Magnetic parameter such as Fig. 3 (b) shown in, be saturated magnetic
Change intensity is 6.12emu/g, and coercivity 870.26Oe shows composite photo-catalyst Bi3O4Cl/SrFe12O19With stronger
It is magnetic.
Photocatalysis experiment shows in the case where simulated solar irradiation xenon lamp irradiates, with 0.1g composite magnetic photocatalyst for degrading 100mL
Concentration is the rhodamine B solution of 10mg/L, and illumination 60min reaches 97.3% to the degradation rate of rhodamine B, right under externally-applied magnetic field
The magnetic rate of recovery of photochemical catalyst is 92.4%, and the degradation rate after reusing 3 times is 95.7%, is illustrated using prepared by the present invention
Bi3O4Cl/SrFe12O19Composite magnetic photochemical catalyst photocatalytic activity with higher and stability.
Claims (2)
1. it is a kind of prepare chlorine four aoxidize three bismuths/strontium ferrite composite magnetic catalysis material method, it is characterised in that including with
Lower step:
(1) preparation of strontium ferrite
SrFe is prepared using hydro-thermal method12O19, the FeCl of 2.1624g is weighed respectively3·6H2The SrCl of O and 0.2666g2·6H2O is total
With being dissolved in 20ml distilled water, sonic oscillation makes it dissolve to obtain mixed solution；It is molten to mixing under the action of magnetic agitation
Certain density NaOH is added dropwise in liquid, the pH for adjusting solution is 10, continues to stir 10min；Solution after stirring is transferred to
It in the reaction kettle of 100mL, is reacted at 200 DEG C for 24 hours, cooling after the reaction was completed, suction filtration is washed with distilled water and dust technology respectively
It 5 times, is dried at 80 DEG C for 24 hours, finally grinding obtains strontium ferrite SrFe12O19；
(2) chlorine four aoxidizes the preparation of three bismuths/strontium ferrite composite magnetic catalysis material
Weigh the Bi (NO of 0.97g3)3·5H2O is added in the ethylene glycol of 20mL, and suspension A is obtained after ultrasonic 10min, is weighed
The NaCl of 0.039g is dissolved in the distilled water of 50mL, obtains solution B after stirring 5min；By solution under the action of mechanical stirring
B is added dropwise in suspension A, is continued to stir 10min after dripping, is obtained suspension C；Weigh mass fraction be 15%~
25% SrFe12O19It is added in suspension C, stirring is transferred to after ten minutes in the reaction kettle liner of 100mL, and 160 DEG C are lauched
Thermal response 12h obtains Bi3O4Cl/SrFe12O19The presoma of photochemical catalyst；Cooling at room temperature, suction filtration, is washed with distilled water 5 times,
And 12h is dried at 80 DEG C；It will be put into 100mL ceramic crucible after drying sample grinding, be placed in Muffle furnace, in 500 DEG C of roasting 2h,
It obtains chlorine four and aoxidizes three bismuths/strontium ferrite Bi3O4Cl/SrFe12O19Composite magnetic catalysis material.
2. chlorine four according to claim 1 aoxidizes three bismuths/strontium ferrite composite magnetic catalysis material preparation method,
It is characterized in that realizing magnetic matrix strontium ferrite with hydro-thermal-roasting method preparation with active component chlorine four and aoxidizing the effective of three bismuths
It is compound.
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| CN114939416B (en) * | 2022-07-01 | 2023-08-22 | 重庆大学 | Preparation method of visible light response composite magnetic tin dioxide photocatalyst |
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