CN110252341A - A kind of Bi2O2SiO3/Bi2O3The preparation method of/BiOBr Heterogeneous Composite luminescent material - Google Patents
A kind of Bi2O2SiO3/Bi2O3The preparation method of/BiOBr Heterogeneous Composite luminescent material Download PDFInfo
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- 239000002131 composite material Substances 0.000 title claims abstract description 31
- 239000000463 material Substances 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(III) oxide Inorganic materials O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 claims abstract description 45
- 229910020489 SiO3 Inorganic materials 0.000 claims abstract description 43
- 239000000843 powder Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 19
- RXPAJWPEYBDXOG-UHFFFAOYSA-N hydron;methyl 4-methoxypyridine-2-carboxylate;chloride Chemical compound Cl.COC(=O)C1=CC(OC)=CC=N1 RXPAJWPEYBDXOG-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000002243 precursor Substances 0.000 claims abstract description 11
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims abstract description 9
- RCEAADKTGXTDOA-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCCCCCC[Na] Chemical compound OS(O)(=O)=O.CCCCCCCCCCCC[Na] RCEAADKTGXTDOA-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 5
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 5
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims abstract description 4
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 15
- JHJLBTNAGRQEKS-UHFFFAOYSA-M sodium bromide Chemical compound [Na+].[Br-] JHJLBTNAGRQEKS-UHFFFAOYSA-M 0.000 claims description 14
- 229960000935 dehydrated alcohol Drugs 0.000 claims description 12
- 239000008367 deionised water Substances 0.000 claims description 11
- 229910021641 deionized water Inorganic materials 0.000 claims description 11
- 239000002270 dispersing agent Substances 0.000 claims description 10
- 238000005245 sintering Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- -1 silicic acid oxygen bismuth Chemical compound 0.000 claims description 7
- 238000003760 magnetic stirring Methods 0.000 claims description 6
- 239000011941 photocatalyst Substances 0.000 claims description 6
- 238000002525 ultrasonication Methods 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 5
- 239000003755 preservative agent Substances 0.000 claims description 5
- 230000002335 preservative effect Effects 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 2
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 239000011975 tartaric acid Substances 0.000 claims description 2
- 235000002906 tartaric acid Nutrition 0.000 claims description 2
- 235000005979 Citrus limon Nutrition 0.000 claims 2
- 244000248349 Citrus limon Species 0.000 claims 1
- 244000131522 Citrus pyriformis Species 0.000 claims 1
- 230000000694 effects Effects 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- 238000002604 ultrasonography Methods 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 abstract description 6
- 239000013078 crystal Substances 0.000 abstract description 6
- 230000001699 photocatalysis Effects 0.000 abstract description 4
- 238000007146 photocatalysis Methods 0.000 abstract description 4
- 229910052797 bismuth Inorganic materials 0.000 abstract description 3
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 abstract description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 1
- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 239000010703 silicon Substances 0.000 abstract 1
- 238000005286 illumination Methods 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 238000005119 centrifugation Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- DQUIAMCJEJUUJC-UHFFFAOYSA-N dibismuth;dioxido(oxo)silane Chemical compound [Bi+3].[Bi+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O DQUIAMCJEJUUJC-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005621 ferroelectricity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003612 virological effect Effects 0.000 description 1
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/02—Sulfur, selenium or tellurium; Compounds thereof
- B01J27/04—Sulfides
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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
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
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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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/03—Precipitation; Co-precipitation
- B01J37/036—Precipitation; Co-precipitation to form a gel or a cogel
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- 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
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/34—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation
- B01J37/341—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation
- B01J37/343—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation of ultrasonic wave energy
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Abstract
The invention discloses a kind of Bi2O2SiO3/Bi2O3The preparation method of/BiOBr heterogeneous material compound.Using bismuth nitrate as bismuth source, ethyl orthosilicate is silicon source, forms required crystal phase by the way that the promotions such as sodium orthophosphate, lauryl sodium sulfate, polyethylene glycol are added, and goes out a kind of Bi by preparing precursor preparation2O2SiO3/Bi2O3/ BiOBr heterogeneous material compound.This method process equipment is simple, the period is short, at low cost, and gained composite material powder has high photocatalysis performance.
Description
Technical field
The invention belongs to photocatalyst technology field, in particular to a kind of Bi2O2SiO3/Bi2O3/ BiOBr Heterogeneous Composite light
The preparation method of material.
Background technique
Bismuth silicate (BSO) has special acousto-optic, photoelectricity, piezoelectricity, conductance and ferroelectricity as a kind of important functional material
Etc. performances.Bi2O2SiO3It is this phase compound of viral in a kind of Austria with layer structure, by [Bi2O2]2+Layer and SiO3 2-Layer edge
C-axis direction alternating growth and form layer structure, anion oxygen acid group SiO3 2-Make its present good structural stability with
Crystal property, therefore Bi2O2SiO3With good chemical stability, while it has preferable visible light photoresponse.It is mostly single
Bismuth system oxide semiconductor equalizing there is a situation where that forbidden bandwidth is wide or narrow, keep its response wave length scope insufficient.If can look for
Two or more is arrived, crystal form matching, structure is similar, the suitable semiconductor of forbidden bandwidth, and forming hetero-junctions just can be good
The above problem is broken off relations, bismuth based semiconductor visible light photocatalysis performance is improved.
Summary of the invention
In order to overcome the disadvantages of the above prior art, the purpose of the present invention is to provide a kind of Bi2O2SiO3/Bi2O3/
The preparation method of BiOBr Heterogeneous Composite luminescent material, simple production process, required equipment is simple, short preparation period, and gained is compound
Photochemical catalyst crystal phase is stablized, and crystallinity is high.
To achieve the goals above, the technical solution adopted by the present invention is that:
A kind of Bi2O2SiO3/Bi2O3The preparation method of/BiOBr Heterogeneous Composite luminescent material, includes the following steps:
(1) dehydrated alcohol and deionized water are mixed and is put into beaker, stirred on magnetic stirring apparatus, then added into beaker
Enter citric acid and stirs to being completely dissolved；
(2) it weighs bismuth nitrate to be added in the beaker, is stirred well to and is completely dissolved after being sealed with preservative film；
(3) ethyl orthosilicate and dispersing agent is added into the beaker again, is stirred well to and is completely dissolved, is formed thick
Leucosol to get arrive precursor solution；
(4) precursor solution is transferred to heating in water-bath and obtains silicic acid oxygen bismuth gel, silicic acid oxygen bismuth gel is heating
A large amount of bubble can be discharged in the process, be then dried to obtain Bi in an oven2O2SiO3/Si2Bi24O40Xerogel is white loose
Shape；
(5) obtained xerogel is sintered；
(6) after the powder obtained after sintering processes being cooled to room temperature, under ultrasonication it is evenly dispersed in water, with
NaBr solution carries out ULTRASONIC COMPLEX, and obtained product, which is collected, to be centrifuged and wash, and is then drying to obtain Bi2O2SiO3/Si2Bi24O40/
BiOBr double heterojunction composite photo-catalyst.
In the step (1), the volume ratio of dehydrated alcohol and deionized water is 1:1~1.2, described on magnetic stirring apparatus
The time of stirring is 5min~10min, and the citric acid keeps the concentration of citric acid after being added be 0.1moL/L~0.8moL/L.
In the step (2), no bismuth nitrate keeps the concentration of bismuth nitrate after being added be 0.1moL/L~1.5moL/L.
It in the step (1), is stirred on magnetic stirring apparatus with slow speed, bismuth nitrate is added in the step (2)
Afterwards, revolving speed is improved, and is deposited on the powder of beaker bottom every the stirring of about 10min glass bar.
In the step (3), dispersing agent is one of sodium orthophosphate, lauryl sodium sulfate, polyethylene glycol, tartaric acid
Or it is a variety of, the concentration of each of them component is 0.2~0.8mol/L.
In the step (4), heating condition be 50~100 DEG C, 4~10 hours, drying condition be 120~200 DEG C, 4~
10h。
In the step (5), sintering processes are that heat treatment 10~14 is small at 500~700 DEG C in Muffle furnace by xerogel
When.
In the step (6), washed for several times with deionized water and dehydrated alcohol, it is then dry at 75~80 DEG C.
In the step (6), powder under ultrasonication it is evenly dispersed in water, adjust pH be 1.5~2.5.
In the step (6), the concentration of NaBr solution is 0.1~0.15mol/L.
Compared with prior art, the beneficial effects of the present invention are:
A kind of Bi provided by the invention2O2SiO3/Bi2O3The preparation method of/BiOBr heterogeneous material compound, it is effective to utilize
Bi2O2SiO3With Bi2O3Between similar structure, suitable forbidden bandwidth forms hetero-junctions between semiconductor.The method have passed through molten
The processes such as glue-gel, heat treatment, ULTRASONIC COMPLEX.Bi is formed during ULTRASONIC COMPLEX2O2SiO3/Bi2O3/ BiOBr double heterojunction,
Synergistic effect between hetero-junctions further promotes the photocatalysis performance of the composite material.The method of the present invention short preparation period, cost
Low, reaction condition is mild, will not generate secondary pollution.
Detailed description of the invention
Fig. 1 is Bi prepared by embodiment 22O2SiO3/Bi2O3The XRD of/BiOBr Heterogeneous Composite luminescent material.
Specific embodiment
The embodiment that the present invention will be described in detail with reference to the accompanying drawings and examples.
Embodiment 1
A kind of Bi2O2SiO3/Bi2O3The preparation method of/BiOBr heterogeneous material compound, includes the following steps:
(1) dehydrated alcohol and deionized water are put into beaker with certain volume than mixing, with slow speed in magnetic force
5min~10min is stirred on blender, is weighed citric acid and is added in beaker and stirs to being completely dissolved；Water alcohol volume ratio is 1:1,
Citric acid concentration is 0.5mol/L；
(2) it weighs a certain amount of bismuth nitrate to be added in beaker, improves revolving speed, and stirred and sunk with glass bar every about 10min
Product is stirred well to after being sealed with preservative film and is completely dissolved in the powder of beaker bottom；The concentration of bismuth nitrate is 0.2mol/L
(3) a certain amount of ethyl orthosilicate and polyethylene glycol, lauryl sodium sulfate are sequentially added as dispersing agent, is sufficiently stirred
It mixes to being completely dissolved to get precursor solution is arrived；The concentration of ethyl orthosilicate is 0.1mol/L, and dispersing agent each component concentration is
0.2mol/L。
(4) silicic acid oxygen bismuth gel is obtained after precursor solution being transferred in water-bath and being kept for 10 hours at 50 DEG C, so
Dry 4h obtains Bi at 200 DEG C in an oven afterwards2O2SiO3/Bi2O3Xerogel.
It (5) will be sintering processes 14 hours at 500 DEG C of powder obtained；
(6) after being cooled to room temperature the powder of sintering processes, powder 0.2g is weighed, is dispersed in water under ultrasonication
In, adjusting pH is 1.5, and with the NaBr solution progress ULTRASONIC COMPLEX that concentration is 0.1mol/L, obtained product is collected centrifugation and is used in combination
Deionized water and dehydrated alcohol washing for several times, are then dried at 75 DEG C to get Bi2O2SiO3/Bi2O3/ BiOBr Heterogeneous Composite material
Material.
Bi2O2SiO3/Bi2O3Under visible light illumination, 150min is 78% to the degradation rate of Rh B to composite granule, and this reality
Apply Bi obtained by example2O2SiO3/Bi2O3/ BiOBr double heterojunction composite photo-catalyst under visible light illumination, drop of the 30min to Rh B
Solution rate is higher than the former nearly 3 times up to 88%
Embodiment 2
A kind of Bi2O2SiO3/Bi2O3The preparation method of/BiOBr Heterogeneous Composite luminescent material, includes the following steps:
(1) dehydrated alcohol and deionized water are put into beaker with certain volume than mixing, with slow speed in magnetic force
5min~10min is stirred on blender, is weighed citric acid and is added in beaker and stirs to being completely dissolved；Water alcohol volume ratio is 1:
1.1, citric acid concentration 0.4mol/L；
(2) it weighs a certain amount of bismuth nitrate to be added in beaker, improves revolving speed, and stirred and sunk with glass bar every about 10min
Product is stirred well to after being sealed with preservative film and is completely dissolved in the powder of beaker bottom；The concentration of bismuth nitrate is 0.6mol/L
(3) a certain amount of ethyl orthosilicate and polyethylene glycol, sodium orthophosphate are sequentially added as dispersing agent, has been stirred well to
Fully dissolved to get arrive precursor solution；The concentration of ethyl orthosilicate is 0.3mol/L, and dispersing agent each component concentration is 0.5mol/
L。
(4) silicic acid oxygen bismuth gel is obtained after precursor solution being transferred in water-bath and being kept for 4 hours at 100 DEG C, so
Dry 4h obtains Bi at 200 DEG C in an oven afterwards2O2SiO3/Bi2O3Xerogel.
It (5) will be sintering processes 10 hours at 700 DEG C of powder obtained；
(6) after being cooled to room temperature the powder of sintering processes, powder 0.5g is weighed, is dispersed in water under ultrasonication
In, adjusting pH is 2.5, and with the NaBr solution progress ULTRASONIC COMPLEX that concentration is 0.15mol/L, obtained product is collected centrifugation and is used in combination
Deionized water and dehydrated alcohol washing for several times, are then dried at 80 DEG C to get Bi2O2SiO3/Bi2O3/ BiOBr Heterogeneous Composite material
Material.
Bi2O2SiO3/Bi2O3Under visible light illumination, 150min is 78% to the degradation rate of Rh B to composite granule, and this reality
Apply Bi obtained by example2O2SiO3/Bi2O3/ BiOBr double heterojunction composite photo-catalyst under visible light illumination, drop of the 30min to Rh B
Solution rate is higher than the former nearly 3 times up to 90%.
From figure 1 it appears that there is apparent diffraction maximum in sample, and by being compared with standard card, discovery gained sample
Product crystal phase is the Bi of orthorhombic phase2O2SiO3With cubic phase Bi2O3Compound.Wherein spreading out for BiOBr is nearby had also appeared at 25 °
Penetrate peak.Gained sample Bi2O2SiO3And Bi2O3Compound phase crystallinity is high, and crystal phase ratio is appropriate, forms hetero-junctions well,
It is middle a small amount of BiOBr phase occur, it was confirmed that the success of ULTRASONIC COMPLEX.
Embodiment 3
A kind of Bi2O2SiO3/Bi2O3The preparation method of/BiOBr Heterogeneous Composite luminescent material, includes the following steps:
(1) dehydrated alcohol and deionized water are put into beaker with certain volume than mixing, with slow speed in magnetic force
5min~10min is stirred on blender, is weighed citric acid and is added in beaker and stirs to being completely dissolved；Water alcohol volume ratio is 1:
1.2, citric acid concentration 0.3mol/L；
(2) it weighs a certain amount of bismuth nitrate to be added in beaker, improves revolving speed, and stirred and sunk with glass bar every about 10min
Product is stirred well to after being sealed with preservative film and is completely dissolved in the powder of beaker bottom；The concentration of bismuth nitrate is 0.8mol/L；
(3) it sequentially adds a certain amount of ethyl orthosilicate and lauryl sodium sulfate is dispersing agent, be stirred well to completely molten
Solution to get arrive precursor solution；The concentration of ethyl orthosilicate is 0.4mol/L, and dispersing agent each component concentration is 0.6mol/L.
(4) silicic acid oxygen bismuth gel is obtained after precursor solution being transferred in water-bath and being kept for 6 hours at 60 DEG C, then
Dry 6h obtains Bi at 140 DEG C in an oven2O2SiO3/Bi2O3Xerogel.
It (5) will be sintering processes 12 hours at 600 DEG C of powder obtained；
(6) after being cooled to room temperature the powder of sintering processes, powder 0.4g is weighed, is dispersed in water under ultrasonication
In, adjusting pH is 2, and with the NaBr solution progress ULTRASONIC COMPLEX that concentration is 0.12mol/L, obtained product, which is collected, to be centrifuged and spend
Ionized water and dehydrated alcohol washing for several times, are then dried at 75 DEG C to get Bi2O2SiO3/Bi2O3/ BiOBr Heterogeneous Composite material
Material.
Bi2O2SiO3/Bi2O3Under visible light illumination, 150min is 78% to the degradation rate of Rh B to composite granule, and this reality
Apply Bi obtained by example2O2SiO3/Bi2O3/ BiOBr double heterojunction composite photo-catalyst under visible light illumination, drop of the 30min to Rh B
Solution rate is higher than the former nearly 3 times up to 92%
It can be seen that the method for the present invention simple process, the period is short, equipment is simple, at low cost, gained composite material powder by
In the synergistic effect of double heterojunction, high photocatalysis performance is shown.
Claims (9)
1. a kind of Bi2O2SiO3/Bi2O3The preparation method of/BiOBr Heterogeneous Composite luminescent material, which is characterized in that including walking as follows
It is rapid:
(1) dehydrated alcohol and deionized water are mixed and is put into beaker, stirred on magnetic stirring apparatus, then lemon is added into beaker
Lemon acid is simultaneously stirred to being completely dissolved；
(2) it weighs bismuth nitrate to be added in the beaker, is stirred well to and is completely dissolved after being sealed with preservative film；
(3) ethyl orthosilicate and dispersing agent is added into the beaker again, is stirred well to and is completely dissolved, form thick white
Colloidal sol to get arrive precursor solution；
(4) precursor solution is transferred to heating in water-bath and obtains silicic acid oxygen bismuth gel, silicic acid oxygen bismuth gel is in heating process
In a large amount of bubble can be discharged, be then dried to obtain Bi in an oven2O2SiO3/Si2Bi24O40Xerogel, white loose shape；
(5) obtained xerogel is sintered；
(6) after the powder obtained after sintering processes being cooled to room temperature, under ultrasonication it is evenly dispersed in water, it is molten with NaBr
Liquid carries out ULTRASONIC COMPLEX, and obtained product, which is collected, to be centrifuged and wash, and is then drying to obtain Bi2O2SiO3/Si2Bi24O40/ BiOBr is bis-
Heterojunction composite photocatalyst.
2. Bi according to claim 12O2SiO3/Bi2O3The preparation method of/BiOBr Heterogeneous Composite luminescent material, feature exist
In in the step (1), the volume ratio of dehydrated alcohol and deionized water is 1:1~1.2, described to stir on magnetic stirring apparatus
Time be 5min~10min, the citric acid keeps the concentration of citric acid after being added be 0.1moL/L~0.8moL/L.
3. Bi according to claim 12O2SiO3/Bi2O3The preparation method of/BiOBr Heterogeneous Composite luminescent material, feature exist
In in the step (2), no bismuth nitrate keeps the concentration of bismuth nitrate after being added be 0.1moL/L~1.5moL/L.
4. Bi according to claim 12O2SiO3/Bi2O3The preparation method of/BiOBr Heterogeneous Composite luminescent material, feature exist
In in the step (1), being stirred on magnetic stirring apparatus with slow speed, after bismuth nitrate is added in the step (2), mentioned
High revolving speed, and the powder of beaker bottom is deposited on every the stirring of about 10min glass bar.
5. Bi according to claim 12O2SiO3/Bi2O3The preparation method of/BiOBr Heterogeneous Composite luminescent material, feature exist
In, in the step (3), dispersing agent be one of sodium orthophosphate, lauryl sodium sulfate, polyethylene glycol, tartaric acid or
A variety of, the concentration of each of them component is 0.2~0.8mol/L.
6. Bi according to claim 12O2SiO3/Bi2O3The preparation method of/BiOBr Heterogeneous Composite luminescent material, feature exist
In in the step (4), heating condition is 50~100 DEG C, and 4~10 hours, drying condition was 120~200 DEG C, 4~10h.
7. Bi according to claim 12O2SiO3/Bi2O3The preparation method of/BiOBr Heterogeneous Composite luminescent material, feature exist
In in the step (5), sintering processes are to be heat-treated xerogel 10~14 hours at 500~700 DEG C in Muffle furnace.
8. Bi according to claim 12O2SiO3/Bi2O3The preparation method of/BiOBr Heterogeneous Composite luminescent material, feature exist
In in the step (6), being washed for several times with deionized water and dehydrated alcohol, then dry at 75~80 DEG C, powder is in ultrasound
Under effect it is evenly dispersed in water, adjust pH be 1.5~2.5.
9. Bi according to claim 12O2SiO3/Bi2O3The preparation method of/BiOBr Heterogeneous Composite luminescent material, feature exist
In in the step (6), the concentration of NaBr solution is 0.1~0.15mol/L.
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