CN105561971A - Novel visible light responsive photocatalyst ZnBi2O4 nanosphere as well as preparation method and application of novel visible light responsive photocatalyst ZnBi2O4 nanosphere in pollutant detection - Google Patents
Novel visible light responsive photocatalyst ZnBi2O4 nanosphere as well as preparation method and application of novel visible light responsive photocatalyst ZnBi2O4 nanosphere in pollutant detection Download PDFInfo
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- CN105561971A CN105561971A CN201510940742.7A CN201510940742A CN105561971A CN 105561971 A CN105561971 A CN 105561971A CN 201510940742 A CN201510940742 A CN 201510940742A CN 105561971 A CN105561971 A CN 105561971A
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- 239000002077 nanosphere Substances 0.000 title claims abstract description 57
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000003344 environmental pollutant Substances 0.000 title claims description 31
- 231100000719 pollutant Toxicity 0.000 title claims description 31
- 238000001514 detection method Methods 0.000 title 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 13
- 239000013049 sediment Substances 0.000 claims abstract description 13
- 238000001035 drying Methods 0.000 claims abstract description 9
- 238000006555 catalytic reaction Methods 0.000 claims abstract description 6
- 238000001179 sorption measurement Methods 0.000 claims abstract description 5
- 239000002904 solvent Substances 0.000 claims abstract description 3
- 238000012544 monitoring process Methods 0.000 claims description 13
- 238000013019 agitation Methods 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 10
- 238000002835 absorbance Methods 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 9
- -1 polytetrafluoroethylene Polymers 0.000 claims description 7
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 7
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 7
- 238000005070 sampling Methods 0.000 claims description 7
- 229910052724 xenon Inorganic materials 0.000 claims description 7
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 7
- 238000010926 purge Methods 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 239000011261 inert gas Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000005119 centrifugation Methods 0.000 claims description 2
- 238000005352 clarification Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000002114 nanocomposite Substances 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 abstract description 5
- 238000007254 oxidation reaction Methods 0.000 abstract description 5
- 230000015556 catabolic process Effects 0.000 abstract description 3
- 150000001875 compounds Chemical class 0.000 abstract description 3
- 238000006731 degradation reaction Methods 0.000 abstract description 3
- 238000004140 cleaning Methods 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 abstract 1
- 239000002957 persistent organic pollutant Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 21
- 239000003054 catalyst Substances 0.000 description 10
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 9
- 239000004065 semiconductor Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 229910010413 TiO 2 Inorganic materials 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000001699 photocatalysis Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 235000019441 ethanol Nutrition 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000010718 Oxidation Activity Effects 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000007146 photocatalysis Methods 0.000 description 2
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
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- 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
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/18—Arsenic, antimony or bismuth
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/06—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of zinc, cadmium or mercury
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
- B01J35/51—Spheres
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
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Abstract
The invention discloses a novel visible light responsive photocatalyst ZnBi2O4 nanosphere. The novel visible light responsive photocatalyst ZnBi2O4 nanosphere is a nanscale compound of a spherical light black microstructure, which is prepared from Bi(NO3)3.5H2O and Zn(NO3)2.6H2O at mole ratio of 2:1, slightly excessive NaAc as well as polyethylene glycol via thermal reaction of a solvent. The preparation method mainly comprises the following steps: mixing Bi(NO3)3.5H2O, Zn(NO3)2.6H2O and ethanediol evenly to form a solution; and adding NaAc and polyethylene glycol into the solution; and reacting the solution at 180-260 DEG C for 14-30 hours, cleaning sediment, and drying so as to obtain the light black powdery matter, namely the ZnBi2O4 nanosphere. According to the invention, the ZnBi2O4 nanosphere is high in specific surface area, is high in adsorption capacity, has better visible light adsorption performance, and is greatly enhanced on organic pollutant optical catalysis, oxidation and degradation; and moreover, the preparation method of the ZnBi2O4 nanosphere is relatively simple, and is easy to operate.
Description
Technical field
The present invention relates to the application, particularly a kind of visible light-responded novel photocatalyst ZnBi in a kind of semiconductor light-catalyst for curbing environmental pollution and preparation method and pollutant monitoring
2o
4nanosphere and preparation thereof
Method and the application in pollutant monitoring.
Background technology
Energy crisis and environmental problem have been two Tough questions that the mankind must face, and how effectively controlling and administering the pollution of various chemical pollutant to environment is emphasis in comprehensive environmental improvement.In recent years, as the Photocatalytic Oxidation With Semiconductors technology of one of high-level oxidation technology, be just subject to the extensive research of Chinese scholars, the pollutant that this technology can be degraded in environment using solar energy as the energy, effectively utilize solar energy, reduce the using energy source of people.
Photocatalytic Oxidation With Semiconductors technology starts from the TiO that Japanese Scientists Fujishima and Honda finds light irradiation
2single Crystalline Electrodes can by H
2o decomposes, and utilizes TiO
2light energy conversion is the study hotspot that electric energy and chemical energy just become field of semiconductor photocatalyst by semiconductor light-catalyst.But, Detitanium-ore-type TiO
2energy gap be 3.2eV, its excitation wavelength is 387.5nm, belongs to the ultraviolet light range in sunshine.And for solar energy, its main energetic concentrates on the visible-range of 400 ~ 600nm, this considerably reduce TiO
2the efficiency of semiconductor light-catalyst, therefore, developing visible light-responded novel semi-conducting material is one of key content of Study on photocatalyst.
In numerous semiconductor light-catalysts newly developed, software engineering researchers invent bismuthates compound, find that such catalyst has less energy gap, can utilize sunshine fully, be the promising photochemical catalyst of a class.But along with going deep into of research, poor stability appears in most bismuthates compound, easy photoetch, limit its development.
Summary of the invention
The object of the present invention is to provide a kind of not only have visible light-responded, to organic pollution, there is degradation capability but also good stability, uncorruptible visible light-responded novel photocatalyst ZnBi
2o
4nanosphere and preparation method and application thereof, overcome the deficiencies in the prior art.
Visible light-responded novel photocatalyst ZnBi of the present invention
2o
4nanosphere is by Bi (NO
3)
35H
2o, Zn (NO
3)
26H
2o, NaAc, polyethylene glycol are spherical light/dark balance nanocomposite through the microstructure that solvent thermal reaction obtains.
Visible light-responded novel photocatalyst ZnBi of the present invention
2o
4nanosphere, wherein said Bi (NO
3)
35H
2o and Zn (NO
3)
26H
2the consumption of O is: 1.8mol ~ 2.2mol ︰ 0.8mol ~ 1.2mol.
Visible light-responded novel photocatalyst ZnBi of the present invention
2o
4the preparation method of nanosphere, step is as follows:
1) by Bi (NO
3)
35H
2o, Zn (NO
3)
26H
2o, ethylene glycol mix and stir evenly to obtain solution, wherein Bi (NO
3)
35H
2o and Zn (NO
3)
26H
2the mol ratio of O is 1.8 ~ 2.2 ︰ 0.8 ~ 1.2, ethylene glycol and Zn (NO
3)
26H
2the mol ratio of O is: 0.8 ~ 1.2 ︰ 0.8 ~ 1.2;
2) to the 1st) add NaAc, NaAc and Zn (NO in the obtained solution of step
3)
26H
2the mol ratio of O is: 13 ~ 17 ︰ 0.8 ~ 1.2, Keep agitation 25 ~ 35 minutes;
3) the 2nd) in solution, add polyethylene glycol, polyethylene glycol and Zn (NO under stirring condition in step
3)
26H
2o mol ratio is: 1 ~ 2 ︰ 0.8 ~ 1.2, within ultrasonic 25 ~ 35 minutes, to solution clarification, is moved into by solution in the reactor of inner liner polytetrafluoroethylene, at temperature 180 ~ 260 DEG C, reacts 14 ~ 30h, after reaction terminates, naturally cool, obtain sediment;
4) be separated the 3rd) step obtain sediment, sediment is cleaned 3 ~ 6 times repeatedly with deionized water and absolute ethyl alcohol respectively, and at 60 DEG C drying, obtain visible light-responded novel photocatalyst ZnBi
2o
4nanosphere.
Visible light-responded novel photocatalyst ZnBi of the present invention
2o
4the preparation method of nanosphere, wherein said Bi (NO
3)
35H
2o and Zn (NO
3)
26H
2the mol ratio of O is 2 ︰ 1, ethylene glycol and Zn (NO
3)
26H
2the mol ratio of O is: 1 ︰ 1.08;
Described NaAc and Zn (NO
3)
26H
2the mol ratio of O is: 15 ︰ 1; Described Keep agitation is 30 minutes;
Described polyethylene glycol and Zn (NO
3)
26H
2o mol ratio is: 1.43 ︰ 1; Described ultrasonic be 30 minutes; Described solution reacts 22h at the reaction kettle for reaction temperature of inner liner polytetrafluoroethylene is 220 DEG C.
Visible light-responded novel photocatalyst ZnBi of the present invention
2o
4the application of nanosphere in pollutant monitoring.
Visible light-responded novel photocatalyst ZnBi of the present invention
2o
4the application of nanosphere in pollutant monitoring, by described visible light-responded novel photocatalyst ZnBi
2o
4nanosphere puts into reactor, inert gas is passed into reactor with flow velocity 20 ~ 100ml/min purge to system stability, after gas pollutant is passed into reactor 10 ~ 60min with flow velocity 1 ~ 10 μ L/h, inlet, outlet is closed, keep reactor sealing, reactor is placed in dark-state and makes the pollutant of gas phase at ZnBi
2o
4nanosphere solid state surface absorption 0.5 ~ 3h, opens xenon lamp and carries out light-catalyzed reaction, in gas outlet place sampling and measuring in course of reaction.
Visible light-responded novel photocatalyst ZnBi of the present invention
2o
4the application of nanosphere in pollutant monitoring, the flow velocity of wherein said inert gas is 20 or 40 or 60 or 80 or 100ml/min; Described pollutant passes into reactor 10 or 20 or 40 or 60min with flow velocity 1 or 2 or 4 or 6 or 8 or 10 μ L/h; Described adsorption time is 0.5 or 1 or 1.5 or 2 or 2.5 or 3h.
Visible light-responded novel photocatalyst ZnBi of the present invention
2o
4the application of nanosphere in pollutant monitoring, by described visible light-responded novel photocatalyst ZnBi
2o
4nanosphere and pollutant in mass ratio 10 ~ 50 ︰ 1 are dissolved in and are equipped with in pollutant solution, ultrasonic disperse 25 ~ 35min, then magnetic agitation 25 ~ 35min in the dark, get the solution after stirring and survey absorbance after centrifugal 3 ~ 7min under 2500 ~ 3500r/min; Then be that light source irradiates with xenon lamp, every 15 ~ 25min sampling is once carried out centrifugal, then surveys absorbance, is calculated the content of pollutant by absorbance.
Visible light-responded novel photocatalyst ZnBi of the present invention
2o
4the application of nanosphere in pollutant monitoring, wherein said visible light-responded novel photocatalyst ZnBi
2o
4the mass ratio of nanosphere and pollutant is 10 or 20 or 30 or 40 or 50 ︰ 1; The described ultrasonic disperse time is 25 or 30 or 35min; The described magnetic agitation time is 25 or 30 or 35min; Described centrifuge RPMs is 2500 or 3000 or 3500r/min; Described centrifugation time for the sampling interval time described in 3 or 4 or 5 or 6 or 7min be 15 or 20 or 25min.
The present invention compared with prior art tool has the following advantages:
1. ZnBi
2o
4the specific area of nanosphere is large, high adsorption capacity;
2. ZnBi
2o
4nanosphere, compared with traditional photochemical catalyst titanium dioxide, has better visible absorption performance, improves a lot to photocatalytic oxidation degradation organic pollution;
3. ZnBi
2o
4the preparation method of nanosphere is fairly simple, is easy to operation, is suitable for industrial production.
Accompanying drawing explanation
Fig. 1 is the ZnBi in embodiment 1
2o
4the scanning electron microscope (SEM) photograph that nanosphere multiplication factor is 4800 times;
Fig. 2 is the ZnBi in embodiment 1
2o
4nanometer bat UV-Vis DRS figure;
Fig. 3 is the ZnBi in embodiment 1
2o
4nanosphere and TiO of the prior art
2photocatalytic degradation dimethylbenzene degraded figure;
Fig. 4 is the ZnBi in embodiment 1
2o
4nanosphere and TiO2 Photocatalytic Degradation of Phenol effect contrast figure.
Detailed description of the invention
Following non-limiting example can make the present invention of those of ordinary skill in the art's comprehend, but does not limit the present invention in any way.
embodiment 1
By 1.9402gBi (NO
3)
35H
2o and 0.5847gZn (NO
3)
26H
2o powder is dissolved in 30mL ethylene glycol, ultrasonic 30min, and stirred at ambient temperature 30min, obtains solution; The NaAc of 0.1629g is added, stirring at room temperature 30min in above-mentioned solution; Add the polyethylene glycol of 2g under agitation to above-mentioned solution, ultrasonic process 30min clarifies to solution.Mixed solution is transferred in the 120mL autoclave of inner liner polytetrafluoroethylene, at temperature 240 DEG C, reacts 22h, naturally cool to room temperature.Centrifugal and collect bottom precipitation thing, use deionized water, ethanol purge sediment successively, sediment after drying, is ground to fine particle in 60 DEG C of drying boxes, the light/dark balance powdered substance obtained is ZnBi
2o
4nanosphere, can know display ZnBi from Fig. 1
2o
4nanosphere, as can be seen from Fig. 2, ZnBi in 400-800nm visible-range
2o
4nanosphere has stronger absorptance.
embodiment 2
By 1.9402gBi (NO
3)
35H
2o and 0.5847gZn (NO
3)
26H
2o powder is dissolved in 30mL ethylene glycol, ultrasonic 30min, and stirred at ambient temperature 30min, obtains solution; The NaAc of 0.1629g is added, stirring at room temperature 30min in above-mentioned solution; Add the polyethylene glycol of 2g under agitation to above-mentioned solution, ultrasonic process 30min clarifies to solution.Mixed solution is transferred in the 120mL autoclave of inner liner polytetrafluoroethylene, at temperature 180 DEG C, reacts 30h, naturally cool to room temperature.Centrifugal and collect bottom precipitation thing, use deionized water, ethanol purge sediment successively, sediment after drying, is ground to fine particle in 60 DEG C of drying boxes, the light/dark balance powdered substance obtained is ZnBi
2o
4nanosphere.
embodiment 3
By 1.9402gBi (NO
3)
35H
2o and 0.5847gZn (NO
3)
26H
2o powder is dissolved in 30mL ethylene glycol, ultrasonic 30min, and stirred at ambient temperature 30min, obtains solution; The NaAc of 0.1629g is added, stirring at room temperature 30min in above-mentioned solution; Add the polyethylene glycol of 2g under agitation to above-mentioned solution, ultrasonic process 30min clarifies to solution.Mixed solution is transferred in the 120mL autoclave of inner liner polytetrafluoroethylene, at temperature 260 DEG C, reacts 14h, naturally cool to room temperature.Centrifugal and collect bottom precipitation thing, use deionized water, ethanol purge sediment successively, sediment after drying, is ground to fine particle in 60 DEG C of drying boxes, the light/dark balance powdered substance obtained is ZnBi
2o
4nanosphere.
application examples 1
Buy business photocatalysis TiO
2(P25 buys in win wound industrial group), without any process, is directly used in light-catalyzed reaction.
By the 0.2gZnBi in embodiment 1
2o
4nanosphere is ground to 20 ~ 60 orders in agate mortar, by ZnBi after grinding
2o
4nanosphere is laid in reactor.By the nitrogen purge that flow velocity is 70mL/min, impurity in removing reactor, be in stable to reactor, air is passed in reactor as the dimethylbenzene of carrier gas, flow velocity is 2 μ L/h, and the time of passing into is closed by inlet, outlet after 30min, 30min, keep reactor sealing, reactor is placed in dark-state and makes the dimethylbenzene of gas phase at ZnBi
2o
4nanosphere solid state surface absorption 1h, opens xenon lamp and carries out light-catalyzed reaction, sample 1 μ L, close xenon lamp after 1h ~ 4h, xylene concentration Agilent7890A gas Chromatographic Determination in course of reaction every 30min in gas outlet.
Experimental result as shown in Figure 3, under visible light conditions, ZnBi
2o
4when nanosphere is as catalyst, through 4h degraded, the clearance of dimethylbenzene is 86%, therefore, under visible light conditions, and ZnBi
2o
4nanosphere has stronger catalytic oxidation activity to vapor phase contaminants.
application examples 2
Buy business photocatalysis TiO
2(P25 buys in win wound industrial group), without any process, is directly used in light-catalyzed reaction.
By the 0.04gZnBi in embodiment 1
2o
4nanosphere is dissolved in and is equipped with in 80mL phenol (10mg/L) beaker, ultrasonic disperse 30min, then magnetic agitation 30min in the dark.Stir complete 2mL solution of first getting and survey absorbance after centrifugal 5min under 3000r/min.Then be that light source irradiates with xenon lamp, every 20min sampling is once carried out centrifugal, then surveys absorbance, is calculated the clearance of phenol by absorbance.
Experimental result as shown in Figure 4, under visible light conditions, ZnBi
2o
4when nanosphere is as catalyst, through 1h degraded, phenol clearance is 95.4%, therefore, and ZnBi
2o
4nanosphere, as photochemical catalyst, under visible light conditions, has stronger catalytic oxidation activity to liguid phase pollutant.
Claims (9)
1. a visible light-responded novel photocatalyst ZnBi
2o
4nanosphere, is characterized in that: described visible light-responded novel photocatalyst ZnBi
2o
4nanosphere is by Bi (NO
3)
35H
2o, Zn (NO
3)
26H
2o, NaAc, polyethylene glycol are spherical light/dark balance nanocomposite through the microstructure that solvent thermal reaction obtains.
2. visible light-responded novel photocatalyst ZnBi according to claim 1
2o
4nanosphere, is characterized in that: described Bi (NO
3)
35H
2o and Zn (NO
3)
26H
2the consumption of O is: 1.8mol ~ 2.2mol ︰ 0.8mol ~ 1.2mol.
3. a visible light-responded novel photocatalyst ZnBi as claimed in claim 1 or 2
2o
4the preparation method of nanosphere, is characterized in that: step is as follows:
1) by Bi (NO
3)
35H
2o, Zn (NO
3)
26H
2o, ethylene glycol mix and stir evenly to obtain solution, wherein Bi (NO
3)
35H
2o and Zn (NO
3)
26H
2the mol ratio of O is 1.8 ~ 2.2 ︰ 0.8 ~ 1.2, ethylene glycol and Zn (NO
3)
26H
2the mol ratio of O is: 0.8 ~ 1.2 ︰ 0.8 ~ 1.2;
2) to the 1st) add NaAc, NaAc and Zn (NO in the obtained solution of step
3)
26H
2the mol ratio of O is: 13 ~ 17 ︰ 0.8 ~ 1.2, Keep agitation 25 ~ 35 minutes;
3) the 2nd) in solution, add polyethylene glycol, polyethylene glycol and Zn (NO under stirring condition in step
3)
26H
2o mol ratio is: 1 ~ 2 ︰ 0.8 ~ 1.2, within ultrasonic 25 ~ 35 minutes, to solution clarification, is moved into by solution in the reactor of inner liner polytetrafluoroethylene, at temperature 180 ~ 260 DEG C, reacts 14 ~ 30h, after reaction terminates, naturally cool, obtain sediment;
4) be separated the 3rd) step obtain sediment, sediment is cleaned 3 ~ 6 times repeatedly with deionized water and absolute ethyl alcohol respectively, and at 60 DEG C drying, obtain visible light-responded novel photocatalyst ZnBi
2o
4nanosphere.
4. visible light-responded novel photocatalyst ZnBi according to claim 3
2o
4the preparation method of nanosphere, is characterized in that:
Described Bi (NO
3)
35H
2o and Zn (NO
3)
26H
2the mol ratio of O is 2 ︰ 1, ethylene glycol and Zn (NO
3)
26H
2the mol ratio of O is: 1 ︰ 1.08;
Described NaAc and Zn (NO
3)
26H
2the mol ratio of O is: 15 ︰ 1; Described Keep agitation is 30 minutes;
Described polyethylene glycol and Zn (NO
3)
26H
2o mol ratio is: 1.43 ︰ 1; Described ultrasonic be 30 minutes; Described solution reacts 22h at the reaction kettle for reaction temperature of inner liner polytetrafluoroethylene is 220 DEG C.
5. one kind as the visible light-responded novel photocatalyst ZnBi in Claims 1 to 4 as described in any one
2o
4the application of nanosphere in pollutant monitoring.
6. visible light-responded novel photocatalyst ZnBi according to claim 5
2o
4the application of nanosphere in pollutant monitoring, is characterized in that: by described visible light-responded novel photocatalyst ZnBi
2o
4nanosphere puts into reactor, inert gas is passed into reactor with flow velocity 20 ~ 100ml/min purge to system stability, after gas pollutant is passed into reactor 10 ~ 60min with flow velocity 1 ~ 10 μ L/h, inlet, outlet is closed, keep reactor sealing, reactor is placed in dark-state and makes the pollutant of gas phase at ZnBi
2o
4nanosphere solid state surface absorption 0.5 ~ 3h, opens xenon lamp and carries out light-catalyzed reaction, in gas outlet place sampling and measuring in course of reaction.
7. visible light-responded novel photocatalyst ZnBi according to claim 5
2o
4the application of nanosphere in pollutant monitoring, is characterized in that: by described visible light-responded novel photocatalyst ZnBi
2o
4nanosphere and pollutant in mass ratio 10 ~ 50 ︰ 1 are dissolved in and are equipped with in pollutant solution, ultrasonic disperse 25 ~ 35min, then magnetic agitation 25 ~ 35min in the dark, get the solution after stirring and survey absorbance after centrifugal 3 ~ 7min under 2500 ~ 3500r/min; Then be that light source irradiates with xenon lamp, every 15 ~ 25min sampling is once carried out centrifugal, then surveys absorbance, is calculated the content of pollutant by absorbance.
8. visible light-responded novel photocatalyst ZnBi according to claim 6
2o
4the application of nanosphere in pollutant monitoring, is characterized in that: the flow velocity of described inert gas is 20 or 40 or 60 or 80 or 100ml/min; Described pollutant passes into reactor 10 or 20 or 40 or 60min with flow velocity 1 or 2 or 4 or 6 or 8 or 10 μ L/h; Described adsorption time is 0.5 or 1 or 1.5 or 2 or 2.5 or 3h.
9. visible light-responded novel photocatalyst ZnBi according to claim 7
2o
4the application of nanosphere in pollutant monitoring, is characterized in that: described visible light-responded novel photocatalyst ZnBi
2o
4the mass ratio of nanosphere and pollutant is 10 or 20 or 30 or 40 or 50 ︰ 1; The described ultrasonic disperse time is 25 or 30 or 35min; The described magnetic agitation time is 25 or 30 or 35min; Described centrifuge RPMs is 2500 or 3000 or 3500r/min; Described centrifugation time for the sampling interval time described in 3 or 4 or 5 or 6 or 7min be 15 or 20 or 25min.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106964378A (en) * | 2017-02-24 | 2017-07-21 | 三明学院 | A kind of preparation method of fluorinated graphene composite visible light response catalyst |
| CN107754819A (en) * | 2017-11-01 | 2018-03-06 | 大连民族大学 | A kind of synthesis has visible light-responded photochemical catalyst SnS2/Bi2WO6The preparation method of nanometer sheet |
| CN108855046A (en) * | 2018-08-02 | 2018-11-23 | 泉州师范学院 | A kind of Zinc Tungstate of core-shell structure/wolframic acid stannous composite photo-catalyst and its preparation and application |
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| CN103285861A (en) * | 2013-06-24 | 2013-09-11 | 大连民族学院 | An Ag3VO4/TiO2 compound nano-wire having visible light activity, a preparation method and applications thereof |
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| CN103285861A (en) * | 2013-06-24 | 2013-09-11 | 大连民族学院 | An Ag3VO4/TiO2 compound nano-wire having visible light activity, a preparation method and applications thereof |
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| JIWEN ZHANG ET AL.: ""Synthesis and visible photocatalytic activity of new photocatalyst MBi2O4(M=Cu,Zn)"", 《J MATER SCI:MATER ELECTRON》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106964378A (en) * | 2017-02-24 | 2017-07-21 | 三明学院 | A kind of preparation method of fluorinated graphene composite visible light response catalyst |
| CN106964378B (en) * | 2017-02-24 | 2019-07-09 | 三明学院 | A kind of preparation method of fluorinated graphene composite visible light response catalyst |
| CN107754819A (en) * | 2017-11-01 | 2018-03-06 | 大连民族大学 | A kind of synthesis has visible light-responded photochemical catalyst SnS2/Bi2WO6The preparation method of nanometer sheet |
| CN108855046A (en) * | 2018-08-02 | 2018-11-23 | 泉州师范学院 | A kind of Zinc Tungstate of core-shell structure/wolframic acid stannous composite photo-catalyst and its preparation and application |
| CN108855046B (en) * | 2018-08-02 | 2020-11-27 | 泉州师范学院 | Zinc tungstate/stannous tungstate composite photocatalyst with core-shell structure and preparation and application thereof |
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