CN108579773B - A kind of perovskite-based composite nano materials and preparation method and purposes - Google Patents
A kind of perovskite-based composite nano materials and preparation method and purposes Download PDFInfo
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- 239000002131 composite material Substances 0.000 title claims abstract description 37
- 239000002086 nanomaterial Substances 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- BWOROQSFKKODDR-UHFFFAOYSA-N oxobismuth;hydrochloride Chemical compound Cl.[Bi]=O BWOROQSFKKODDR-UHFFFAOYSA-N 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 9
- 238000001291 vacuum drying Methods 0.000 claims abstract description 3
- 239000011575 calcium Substances 0.000 claims description 46
- 229940073609 bismuth oxychloride Drugs 0.000 claims description 35
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 13
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 13
- 229910052791 calcium Inorganic materials 0.000 claims description 13
- 239000011591 potassium Substances 0.000 claims description 13
- 229910052700 potassium Inorganic materials 0.000 claims description 13
- 239000008367 deionised water Substances 0.000 claims description 12
- 229910021641 deionized water Inorganic materials 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 11
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 6
- 239000000725 suspension Substances 0.000 claims description 5
- 238000005119 centrifugation Methods 0.000 claims description 4
- 238000013033 photocatalytic degradation reaction Methods 0.000 claims description 4
- 229960000935 dehydrated alcohol Drugs 0.000 claims description 3
- 238000011065 in-situ storage Methods 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 238000002604 ultrasonography Methods 0.000 claims description 3
- YCIHPQHVWDULOY-FMZCEJRJSA-N (4s,4as,5as,6s,12ar)-4-(dimethylamino)-1,6,10,11,12a-pentahydroxy-6-methyl-3,12-dioxo-4,4a,5,5a-tetrahydrotetracene-2-carboxamide;hydrochloride Chemical compound Cl.C1=CC=C2[C@](O)(C)[C@H]3C[C@H]4[C@H](N(C)C)C(=O)C(C(N)=O)=C(O)[C@@]4(O)C(=O)C3=C(O)C2=C1O YCIHPQHVWDULOY-FMZCEJRJSA-N 0.000 claims description 2
- 238000003760 magnetic stirring Methods 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 238000000527 sonication Methods 0.000 claims description 2
- 240000007594 Oryza sativa Species 0.000 claims 1
- 235000007164 Oryza sativa Nutrition 0.000 claims 1
- WGKMWBIFNQLOKM-UHFFFAOYSA-N [O].[Cl] Chemical compound [O].[Cl] WGKMWBIFNQLOKM-UHFFFAOYSA-N 0.000 claims 1
- 229910052797 bismuth Inorganic materials 0.000 claims 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims 1
- 235000009566 rice Nutrition 0.000 claims 1
- 230000001699 photocatalysis Effects 0.000 abstract description 14
- 239000000463 material Substances 0.000 abstract description 12
- 150000001875 compounds Chemical class 0.000 abstract description 5
- 238000002156 mixing Methods 0.000 abstract description 3
- 239000011941 photocatalyst Substances 0.000 abstract description 3
- 239000007787 solid Substances 0.000 abstract description 3
- 238000009776 industrial production Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000001681 protective effect Effects 0.000 abstract description 2
- 239000011259 mixed solution Substances 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- 239000010955 niobium Substances 0.000 description 38
- 238000007146 photocatalysis Methods 0.000 description 7
- VDZOOKBUILJEDG-UHFFFAOYSA-M tetrabutylammonium hydroxide Chemical compound [OH-].CCCC[N+](CCCC)(CCCC)CCCC VDZOOKBUILJEDG-UHFFFAOYSA-M 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 5
- 238000006731 degradation reaction Methods 0.000 description 5
- 238000006555 catalytic reaction Methods 0.000 description 4
- 239000004570 mortar (masonry) Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 230000005588 protonation Effects 0.000 description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Substances [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 229910017604 nitric acid Inorganic materials 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 230000001376 precipitating effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000002835 absorbance Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002173 high-resolution transmission electron microscopy Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Inorganic materials O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000003115 biocidal effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000002135 nanosheet Substances 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003746 solid phase reaction Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- 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
- B01J27/138—Halogens; Compounds thereof with alkaline earth metals, magnesium, beryllium, zinc, cadmium or mercury
-
- 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/08—Heat treatment
- B01J37/10—Heat treatment in the presence of water, e.g. steam
-
- 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
- C02F2101/308—Dyes; Colorants; Fluorescent agents
-
- 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 present invention relates to a kind of perovskite-based composite nano materials and preparation methods and purposes, belong to material preparation and light-catalysed technical field.BiOCl/K is prepared using hydro-thermal method+Ca2Nb3O10 ‑Hetero-junctions compound nanometer photocatalyst, detailed process is as follows: taking K+Ca2Nb3O10 ‑It is mixed in a certain amount of water, after mixing evenly, Bi (NO is added3)3·5H2O, gained mixed solution is transferred in hydrothermal reaction kettle by KCl solid after being sufficiently mixed, and for 24 hours, centrifuge washing vacuum drying obtains BiOCl/K for 160 DEG C of reactions+Ca2Nb3O10 ‑Hetero-junctions composite nano materials.Products obtained therefrom photocatalytic activity is good, and stability is high, and production process is environmentally protective, is expected to large-scale industrial production.
Description
Technical field
The present invention relates to a kind of perovskite-based composite nano materials and preparation method and purposes, belongs to material preparation and light is urged
The technical field of change.
Technical background
In recent years, photocatalysis technology is because having the various features such as low energy consumption, reaction condition be mild and without secondary pollution, by
To the extensive concern of researcher.Photocatalysis technology can convert the solar energy of low-density to highdensity chemical energy (Hydrogen Energy),
Can degrade and organic pollutant and antibiotic in mineralising environment again, thus it solution energy crisis in problem of environmental pollution
Have important application value.
In numerous two-dimensional semiconductor materials, from Dion-Jacobson phase (M [An-1BnO3n+1]) laminated perovskite structure niobium
The two-dimentional calcium niobate potassium (K that hydrochlorate separates+Ca2Nb3O10 -) poly metal oxide nano piece energy with good stability, especially
It is that the conduction band of the nanosheet photocatalytic material is made of the Nb 4d track of high level, and the light induced electron of generation has very strong
Reducing power.But simple two-dimentional K+Ca2Nb3O10 -Catalysis material lacks enough active sites, causes its surface a large amount of
Light induced electron is quenched with hole recombination, to reduce photocatalysis efficiency.In order to solve this problem, simple K+Ca2Nb3O10 -
It is often used to especially construct with the composite photocatalyst material of the compound preparation binary of the progress such as oxide or sulfide, ternary
Heterojunction material；The heterojunction material of this special designing can effectively promote the separation in light induced electron and hole, inhibit photoproduction
Electronics and hole it is compound, finally improve photocatalysis efficiency.
In numerous photocatalytic semiconductor materials, bismuth oxychloride (BiOCl) is connected to two Cl because having-[Bi2O2]2+
Two-dimensional layered structure, and show excellent physicochemical property.(001) crystal face of BiOCl possess higher end oxygen atom density and
Lacking oxygen is formed, its photocatalytic activity is improved.Because possessing the band structure to match, BiOCl and the photocatalysis of laminated perovskite type
Material K+Ca2Nb3O10 -It is compound to form II type hetero-junctions, possess the separative efficiency in higher light induced electron and hole, Jin Erti
Highlight catalytic active.Meanwhile compared to zero dimension/two dimension, one-dimensional/two dimensional heterostructures, two-dimentional BiOCl/ two dimension K+Ca2Nb3O10 -
The formation of hetero-junctions possesses more active sites, improves light capture ability.
So far, it is not yet found that people prepares BiOCl/K using hydro-thermal method+Ca2Nb3O10 -Hetero-junctions composite Nano material
Material, K used+Ca2Nb3O10 -With stable physicochemical property, raw material are cheap and easy to get, nontoxic, and are prepared using it as carrier
BiOCl/K+Ca2Nb3O10 -The reaction process of hetero-junctions composite nano materials is simple, and products obtained therefrom photocatalytic activity is good, stability
Height, production process is environmentally protective, is expected to large-scale industrial production.
Summary of the invention
It is new under cryogenic that it is an object of the present invention to provide one kind, with simple and easy hydro-thermal method fabricated in situ Z-type
BiOCl/K+Ca2Nb3O10 -The method of hetero-junctions composite nano materials.
The present invention is realized by following steps:
(1) calcium niobate potassium nanometer sheet (K is prepared+Ca2Nb3O10 -): weigh the K of a certain amount of drying2CO3、CaCO3And Nb2O5In
In mortar, it is fully ground mixing and is placed in semi-enclosed crucible, crucible is then transferred to the heating of auto-programming temperature control
It is calcined in tube furnace.It after room temperature, takes out, with mortar grinder to after powdered, is added to 5molL-1HNO3
A couple of days is stirred in solution, carries out protonation processing.The white precipitate deionized water and washes of absolute alcohol that protonation is obtained
Remove HNO3, then be centrifuged, it is dried to obtain white solid HCa2Nb3O10.Weigh a certain amount of HCa2Nb3O10A certain amount of quality is added
After tetrabutylammonium hydroxide solution and appropriate amount of deionized water stirring a couple of days of score 10%, it is centrifuged to obtain upper layer colloidal substance.
Colloidal substance is finally added dropwise to 2molL-1Obtain white precipitate in KCl solution, by above-mentioned precipitating deionized water and
Washes of absolute alcohol, centrifugation are dried in vacuo (ChemSusChem, 2016,9,396-402).
(2) bismuth oxychloride/calcium niobate potassium hetero-junctions composite nano materials (BiOCl/K is prepared+Ca2Nb3O10 -): it weighs certain
The K of amount+Ca2Nb3O10 -It is scattered in deionized water, obtains the suspension of stable homogeneous through ultrasound, stir process.In the feelings of stirring
Under condition, a certain amount of Bi (NO is added3)3·5H2O and KCl is sufficiently mixed in above-mentioned suspension.Reaction solution, which is transferred to liner, is
In the reaction kettle of polytetrafluoroethylene (PTFE), it is placed in hydro-thermal reaction in baking oven, obtained product deionized water and dehydrated alcohol is cleaned, from
The heart, vacuum drying obtain bismuth oxychloride/calcium niobate potassium hetero-junctions composite nano materials.
In the calcium niobate potassium nanometer sheet synthesis process, K+、Ca2+And Nb5+Molar ratio be 1.1:2:3.HCa2Nb3O10With
The ratio of tetrabutylammonium hydroxide is 1g:5ml.
In the bismuth oxychloride/calcium niobate potassium hetero-junctions composite nano materials, bismuth oxychloride accounts for bismuth oxychloride/calcium niobate potassium
The 10%-50% of hetero-junctions composite nano materials gross mass, preferably 40%.
The power of ultrasonic machine used in the ultrasonic disperse is 250W, sonication treatment time 0.5-1h.
The stir process uses magnetic stirring apparatus, and the stir process time is 1-1.5h.
The temperature of the hydro-thermal reaction is 150-200 DEG C, reaction time 18-24h.
Utilize X-ray diffractometer (XRD), transmission electron microscope (TEM) and high resolution transmission electron microscopy
(HRTEM) micromorphology analysis is carried out to product, is that target dyestuff carries out photocatalysis with quadracycline (TC, 35mg/L) solution
Degradation experiment measures absorbance by ultraviolet-visible spectrophotometer, to assess its Photocatalytic Degradation Property.
Detailed description of the invention
Fig. 1 is K+Ca2Nb3O10 -, BiOCl and BiOCl/K+Ca2Nb3O10 -The XRD diffraction of hetero-junctions nano-photocatalyst
Spectrogram, as can be seen from the figure BiOCl/K+Ca2Nb3O10 -XRD spectrum mainly by BiOCl and K+Ca2Nb3O10 -Diffraction maximum structure
At.
Fig. 2A, B, C are respectively simple K+Ca2Nb3O10 -Sample, simple BiOCl sample, BiOCl/K+Ca2Nb3O10 -Hetero-junctions
The transmission electron microscope photo of composite nano materials；D is BiOCl/K+Ca2Nb3O10 -The high-resolution of hetero-junctions composite nano materials transmits
Electromicroscopic photograph.As seen from the figure, BiOCl nanometer sheet is successfully compounded in K+Ca2Nb3O10 -Nanometer sheet surface.
Fig. 3 is that the catalysis material of different quality ratio is degraded the when m- degradation rate relational graph of TC solution, prepared 40%
BiOCl/K+Ca2Nb3O10 -Hetero-junctions composite nano materials have most excellent photocatalytic activity, and sample reacts 150min in catalysis
TC solution degradation rate has reached 94.5% afterwards.
Specific embodiment
1 calcium niobate potassium nanometer sheet (K of embodiment+Ca2Nb3O10 -) preparation
The preparation of calcium niobate potassium nanometer sheet uses high-temperature solid phase reaction method: weighing 0.3406g K2CO3、0.8968g CaCO3
With 1.7865g Nb2O5It in mortar, is fully ground mixing and is placed in semi-enclosed crucible, be then transferred to crucible certainly
1200 DEG C of calcining 10h in the heating tube furnace of dynamic program temperature control.After naturally cool to being taken out after room temperature, with mortar grinder to powder
After shape, 4g is taken to be added to 200ml 5molL-1HNO33d is stirred in solution, carries out protonation processing.Protonation is obtained white
Color precipitating uses 3 removing HNO of deionized water and washes of absolute alcohol respectively3, then be centrifuged through 6000rad/min, 60 DEG C of drying 12h
Obtain white solid HCa2Nb3O10.Take 0.1g HCa2Nb3O10With the tetrabutylammonium hydroxide solution of 0.5ml mass fraction 10%
It is scattered in 100ml deionized water stirring 7d, is centrifuged to obtain upper layer colloid object through 1500rad/min.Dropwise by colloid object finally
It is added to 100ml 2molL-1White precipitate is obtained in KCl solution, above-mentioned precipitating is used into deionized water and dehydrated alcohol respectively
Cleaning 3 times, is centrifuged through 6000rad/min, is finally placed in 60 DEG C of vacuum ovens and dries for 24 hours.
2 40%BiOCl/K of embodiment+Ca2Nb3O10 -The preparation of hetero-junctions composite nano materials
BiOCl/K+Ca2Nb3O10 -The preparation of hetero-junctions composite nano materials uses traditional hydro-thermal method: weighing 0.0391g
K+Ca2Nb3O10 -It is scattered in 65ml deionized water, sonicated 1h and stir process 1.5h obtain the suspended of stable homogeneous
Liquid.In the case of stirring, 0.0485g Bi (NO is added3)3·5H2O and 0.0075g KCl is sufficiently mixed in above-mentioned suspension
It closes.It is to be put into 160 DEG C of water in baking oven in the reaction kettle of 100ml that by above-mentioned reaction solution, to be transferred to liner, which be polytetrafluoroethylene (PTFE) capacity,
For 24 hours, cooled to room temperature, obtained product uses deionized water and washes of absolute alcohol 3 times to thermal response respectively, through 4500rad/
Min centrifugation is finally placed in 60 DEG C of vacuum ovens dry 12h and obtains 40%BiOCl/K+Ca2Nb3O10 -Hetero-junctions composite Nano
Material.
Embodiment 3CdIn2S4/g-C3N4The experiment of/GO composite material photocatalytic activity
(1) compound concentration is the TC solution of 35mg/L, and the solution prepared is kept in dark place.
(2) BiOCl/K of different quality ratio is weighed+Ca2Nb3O10 -Hetero-junctions composite nano materials 0.035g, is respectively placed in
In photo catalysis reactor, the target degradation solution that 35mL step (1) is prepared, the lower magnetic agitation 60min of dark, to BiOCl/ is added
K+Ca2Nb3O10 -Hetero-junctions composite nano materials be uniformly dispersed and with TC reach absorption-desorption balance after, open cooling water and
300W xenon source carries out photocatalytic degradation experiment.
(3) every 30min draws the photocatalytic degradation liquid in reactor, and the measurement of UV-visible absorbance is used for after centrifugation.
(4) prepared BiOCl/K as seen from Figure 3+Ca2Nb3O10 -There is hetero-junctions composite nano materials excellent light to urge
Change activity, especially 40%BiOCl/K+Ca2Nb3O10 -Sample catalysis react 150min after TC solution degradation rate have reached
94.5%.
Claims (8)
1. a kind of preparation method of perovskite-based composite nano materials, which is characterized in that the perovskite-based composite nano materials
It is using one step hydro thermal method fabricated in situ Z-type BiOCl/K+Ca2Nb3O10 -Hetero-junctions composite nano materials, specific steps are as follows: weigh
A certain amount of K+Ca2Nb3O10 -It is scattered in deionized water, obtains the suspension of stable homogeneous through ultrasound, stir process；It is stirring
In the case where, a certain amount of Bi (NO is added3)3·5H2O and KCl is sufficiently mixed in above-mentioned suspension；Reaction solution is transferred to interior
Lining is to be placed in hydro-thermal reaction in baking oven in the reaction kettle of polytetrafluoroethylene (PTFE) and carry out fabricated in situ, obtained product deionized water
It is cleaned with dehydrated alcohol, centrifugation, vacuum drying obtains bismuth oxychloride/calcium niobate potassium hetero-junctions composite nano materials.
2. a kind of preparation method of perovskite-based composite nano materials as described in claim 1, which is characterized in that BiOCl receives
Rice piece is compounded in K+Ca2Nb3O10 -Nanometer sheet surface.
3. a kind of preparation method of perovskite-based composite nano materials as described in claim 1, which is characterized in that the chlorine oxygen
Change in bismuth/calcium niobate potassium hetero-junctions composite nano materials, bismuth oxychloride accounts for bismuth oxychloride/calcium niobate potassium hetero-junctions composite Nano material
Expect the 10%-50% of gross mass.
4. a kind of preparation method of perovskite-based composite nano materials as claimed in claim 3, which is characterized in that bismuth oxychloride
Account for bismuth oxychloride/calcium niobate potassium hetero-junctions composite nano materials gross mass 40%.
5. a kind of preparation method of perovskite-based composite nano materials as described in claim 1, which is characterized in that the ultrasound
The power for dispersing ultrasonic machine used is 250W, sonication treatment time 0.5-1h.
6. a kind of preparation method of perovskite-based composite nano materials as described in claim 1, which is characterized in that the stirring
Processing uses magnetic stirring apparatus, and the stir process time is 1-1.5h.
7. a kind of preparation method of perovskite-based composite nano materials as described in claim 1, which is characterized in that the hydro-thermal
The temperature of reaction is 150-200 DEG C, reaction time 18-24h.
8. the purposes of perovskite-based composite nano materials prepared by the preparation method as described in claim 1-7 is any, feature exist
In for photocatalytic degradation quadracycline.
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| CN112717958B (en) * | 2021-01-22 | 2022-06-21 | 江苏大学 | Oxygen-rich vacancy BiOBr/HNb3O8Preparation method and application of nanosheet photocatalyst |
| CN113877608A (en) * | 2021-09-18 | 2022-01-04 | 盐城工学院 | Based on La2Ce2O7Preparation method and application of BiOCl-and-photocatalytic composite material |
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| CN106563485A (en) * | 2016-11-08 | 2017-04-19 | 江苏大学 | Carbon nitride/potassium calcium niobate composite material and preparing method and application thereof |
| CN107262085A (en) * | 2017-07-21 | 2017-10-20 | 江苏大学 | A kind of preparation method of bismuth/calcium niobate potassium plasma nano composite |
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| JP2007021354A (en) * | 2005-07-15 | 2007-02-01 | Nikon Corp | Photo-catalyst and its manufacturing method |
| CN104511293A (en) * | 2014-10-31 | 2015-04-15 | 北京理工大学 | Bismuth oxychloride-iron bismuth titanate composite photocatalyst and preparation method thereof |
| CN106563485A (en) * | 2016-11-08 | 2017-04-19 | 江苏大学 | Carbon nitride/potassium calcium niobate composite material and preparing method and application thereof |
| CN107262085A (en) * | 2017-07-21 | 2017-10-20 | 江苏大学 | A kind of preparation method of bismuth/calcium niobate potassium plasma nano composite |
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