CN104324719B - Visible light-responded photocatalyst and preparation method thereof - Google Patents
Visible light-responded photocatalyst and preparation method thereof Download PDFInfo
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- CN104324719B CN104324719B CN201410551587.5A CN201410551587A CN104324719B CN 104324719 B CN104324719 B CN 104324719B CN 201410551587 A CN201410551587 A CN 201410551587A CN 104324719 B CN104324719 B CN 104324719B
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- 239000011941 photocatalyst Substances 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000000843 powder Substances 0.000 claims abstract description 21
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 238000000498 ball milling Methods 0.000 claims abstract description 6
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(III) oxide Inorganic materials O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000013064 chemical raw material Substances 0.000 claims abstract description 6
- 239000012153 distilled water Substances 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 6
- LEDMRZGFZIAGGB-UHFFFAOYSA-L strontium carbonate Chemical compound [Sr+2].[O-]C([O-])=O LEDMRZGFZIAGGB-UHFFFAOYSA-L 0.000 claims abstract description 6
- 229910000018 strontium carbonate Inorganic materials 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000000354 decomposition reaction Methods 0.000 abstract description 3
- 230000003595 spectral effect Effects 0.000 abstract description 3
- 230000001954 sterilising effect Effects 0.000 abstract description 3
- 238000004659 sterilization and disinfection Methods 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000005286 illumination Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000003786 synthesis reaction Methods 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 abstract 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical group O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 7
- 230000001699 photocatalysis Effects 0.000 description 7
- STZCRXQWRGQSJD-GEEYTBSJSA-M methyl orange Chemical compound [Na+].C1=CC(N(C)C)=CC=C1\N=N\C1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-GEEYTBSJSA-M 0.000 description 4
- 229940012189 methyl orange Drugs 0.000 description 4
- 238000007146 photocatalysis Methods 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 3
- 239000010955 niobium Substances 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 239000004408 titanium dioxide Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 239000003205 fragrance Substances 0.000 description 2
- 239000000575 pesticide Substances 0.000 description 2
- 238000010532 solid phase synthesis reaction Methods 0.000 description 2
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- 229910002900 Bi2MoO6 Inorganic materials 0.000 description 1
- 229910002915 BiVO4 Inorganic materials 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229910003334 KNbO3 Inorganic materials 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- VEUKJXRCHYAIAW-UHFFFAOYSA-N [Nb].[K] Chemical compound [Nb].[K] VEUKJXRCHYAIAW-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 150000001621 bismuth Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- -1 pottery Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000005297 pyrex Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 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
- 229910052727 yttrium Inorganic materials 0.000 description 1
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Abstract
The present invention provides a kind of visible light-responded photocatalyst, and the chemical constitution formula of described photocatalyst is Sr3Bi4V2O14, its preparation method comprises the steps: chemical raw material SrCO3、Bi2O3And V2O5Starting powder press Sr3Bi4V2O14Composition weighs dispensing；The raw material mixing that will prepare, puts in ball grinder, adds zirconia ball and distilled water, ball milling, dries, crosses 200 mesh sieves；By the powder of mix homogeneously 820 DEG C of pre-burnings, and it is incubated 6 hours, natural cooling, pulverize and obtain Sr3Bi4V2O14Powder.The spectral response range width of the photocatalyst that the present invention obtains, light conversion efficiency height and good stability, there is decomposition harmful chemical, organic-biological matter and the effect of sterilization under visible light illumination；Additionally preparation method is simple, synthesis temperature is low, low cost, is suitable for commercial production and application.
Description
Technical field
The present invention relates to a kind of visible light-responded photocatalyst Sr3Bi4V2O14And preparation method thereof, belong to inorganic field of photocatalytic material.
Background technology
Along with socioeconomic development, people increasingly pay close attention to for the energy and ecological environment, solve energy shortage and problem of environmental pollution be realize sustainable development, improve people's living standard and safeguard national security in the urgent need to.
From phase late 1970s, there has been proposed and utilize in photocatalyst decomposition water and the Organic substance such as pesticide in air and odorant, and scribble the application example such as self-cleaning of the surface of solids of photocatalyst.The principle of light-catalyzed reaction be photocatalyst after absorbing higher than the photon of its band-gap energy, generate hole and electronics, these holes and electronics carry out oxidation reaction and reduction reaction respectively, reach to decompose harmful chemical, organic-biological matter and the purpose of sterilization.Photocatalyst has many kinds, and the most most representative is titanium dioxide (TiO2), utilize titanium dioxide that the Organic substances such as the pesticide in water and in air and odorant are decomposed, but the band gap of titanium dioxide is 3.2eV, under the ultraviolet irradiation shorter than 400nm, only just can show activity, can only be at indoor or the local work having uviol lamp, being little to utilize visible ray, this greatly limits the use of titanium dioxide optical catalyst.
In view of photocatalyst practicality in decomposing harmful substances, it is indispensable for utilizing sunlight as light source.Irradiate the sunlight medium wavelength maximum intensity of visible ray near 500nm to earth's surface, wavelength is that the energy of the visible region of 400nm ~ 750nm is about the 43% of sunlight gross energy, so in order to utilize efficiently, the R and D of bismuth series photocatalyst have been achieved for a series of great achievement, bismuthous complex such as BiVO4、Bi2MoO6、Bi2Mo2O9、Bi2Mo3O12And Bi2WO4It is in the news and there is good absorption under visible light.A series of niobiums (tantalum) hydrochlorate photocatalyst is widely studied owing to having higher photocatalytic activity.Such as, niobate photocatalyst Pb3Nb4O13、BiNbO4And Bi2MNbO7(M=Al, Ga, In, Y, rare earth element and Fe) etc. and niobium potassium compound oxide photocatalyst such as KNbO3、KNb3O8、K4Nb6O17And K6Nb10.6O30Deng all having preferable photocatalysis performance.
Although photocatalysis research has been carried out the several years, but at present report to have visible light-responded photocatalyst kind the most limited, there are still that light conversion efficiency is low, poor stability and the problem such as spectral response range is narrow, so it is the most necessary for researching and developing the new visible light-responded high efficiency photocatalyst that has.We are to consisting of Ba3Bi4V2O14、Sr3Bi4V2O14、Ca3Bi4V2O14、Pb3Bi4V2O14、Sr3Nd4V2O14、Sr3Y4V2O14Noval chemical compound carried out Photocatalytic Performance Study, found that Sr3Bi4V2O14Band gap be 2.69 eV, have excellence visible light-responded photocatalysis performance, the band gap width of other sample is both greater than 3.0eV, just can only can show activity under ultraviolet irradiation.
Summary of the invention
It is an object of the invention to provide and a kind of there is visible light-responded photocatalyst Sr3Bi4V2O14And preparation method thereof.
The chemical constitution formula with visible light-responded photocatalyst that the present invention relates to is: Sr3Bi4V2O14。
The preparation method of above-mentioned visible light-responded photocatalyst concretely comprises the following steps:
(1) by 99.9% analytically pure chemical raw material SrCO3、Bi2O3And V2O5Starting powder press Sr3Bi4V2O14Composition weigh dispensing.
(2) raw material mixing step (1) prepared, puts in ball grinder, adds zirconia ball and distilled water, ball milling 8 hours, be mixed and finely ground, take out and dry, cross 200 mesh sieves.
(3) by the powder of step (2) mix homogeneously 800 ~ 850 DEG C of pre-burnings, and it is incubated 6 hours, naturally cools to room temperature, then pulverize means by ball mill and make average diameter of particles diminish, less than 2 μm, i.e. obtain Sr3Bi4V2O14Powder.
The spectral response range width of the photocatalyst that the present invention obtains, light conversion efficiency height and good stability, there is decomposition harmful chemical, organic-biological matter and the effect of sterilization under visible light illumination；Additionally preparation method is simple, synthesis temperature is low, low cost, is suitable for commercial production and application.
Detailed description of the invention
Present invention will be described in detail below:
1, in order to obtain the composite oxides used in the present invention, prepare powder first by solid-phase synthesis, i.e. various oxides or the carbonate as raw material is mixed according to target constitutional chemistry metering ratio, then synthesize in air atmosphere at ambient pressure.
2 in order to effectively utilize light, the size of the photocatalyst in the present invention preferably in micron level, even nanoparticle, and specific surface area is bigger.The oxide powder prepared with solid-phase synthesis, its particle is relatively big and surface area is less, but can be by the pulverizing means such as ball mill and make particle diameter diminish.
3, the photocatalysis experiment of the present invention is using methyl orange as simulation organic pollution, and its concentration is 20mg/L；Photocatalyst Sr3Bi4V2O14Addition be 1g/L；Light source uses the xenon lamp of 300W, and reactive tank uses the vessel that pyrex is made, and obtains the wavelength light more than 420nm long wavelength by wave filter, then irradiates photocatalyst；Catalysis time is set as 60 minutes.
Embodiment 1:
(1) by 99.9% analytically pure chemical raw material SrCO3、Bi2O3And V2O5Starting powder press Sr3Bi4V2O14Composition weigh dispensing.
(2) raw material mixing step (1) prepared, puts in ball grinder, adds zirconia ball and distilled water, ball milling 8 hours, be mixed and finely ground, take out and dry, cross 200 mesh sieves.
(3) by the powder of step (2) mix homogeneously 800 DEG C of pre-burnings, and it is incubated 6 hours, naturally cools to room temperature, then pulverize means by ball mill and make average diameter of particles diminish, less than 2 μm, i.e. obtain Sr3Bi4V2O14Powder.
Prepared photocatalyst, under the wavelength radiation of visible light more than 420nm, reaches 97.8% to methyl orange clearance in 60 minutes.
Embodiment 2:
(1) by 99.9% analytically pure chemical raw material SrCO3、Bi2O3And V2O5Starting powder press Sr3Bi4V2O14Composition weigh dispensing.
(2) raw material mixing step (1) prepared, puts in ball grinder, adds zirconia ball and distilled water, ball milling 8 hours, be mixed and finely ground, take out and dry, cross 200 mesh sieves.
(3) by the powder of step (2) mix homogeneously 820 DEG C of pre-burnings, and it is incubated 6 hours, naturally cools to room temperature, then pulverize means by ball mill and make average diameter of particles diminish, less than 2 μm, i.e. obtain Sr3Bi4V2O14Powder.
Prepared photocatalyst, under the wavelength radiation of visible light more than 420nm, reaches 98.7% to methyl orange clearance in 60 minutes.
Embodiment 3:
(1) by 99.9% analytically pure chemical raw material SrCO3、Bi2O3And V2O5Starting powder press Sr3Bi4V2O14Composition weigh dispensing.
(2) raw material mixing step (1) prepared, puts in ball grinder, adds zirconia ball and distilled water, ball milling 8 hours, be mixed and finely ground, take out and dry, cross 200 mesh sieves.
(3) by the powder of step (2) mix homogeneously 850 DEG C of pre-burnings, and it is incubated 6 hours, naturally cools to room temperature, then pulverize means by ball mill and make average diameter of particles diminish, less than 2 μm, i.e. obtain Sr3Bi4V2O14Powder.
Prepared photocatalyst, under the wavelength radiation of visible light more than 420nm, 60min reaches 98.3% to methyl orange clearance.
The present invention is never limited to above example.The bound of each temperature, interval value can realize the present invention, embodiment numerous to list herein.
The made photocatalyst powder of above inventive embodiments can be carried on multiple matrix surface.Matrix can be glass, pottery, activated carbon or quartz sand etc., and photocatalyst can be carried on matrix surface in the form of a film.
Claims (1)
1. a visible light-responded photocatalyst, it is characterised in that the chemical constitution formula of described photocatalyst is Sr3Bi4V2O14, its preparation method comprises the steps:
(1) by 99.9% analytically pure chemical raw material SrCO3、Bi2O3And V2O5Starting powder press Sr3Bi4V2O14Composition weighs dispensing；
(2) raw material mixing step (1) prepared, puts in ball grinder, adds zirconia ball and distilled water, ball milling 8 hours, be mixed and finely ground, take out and dry, cross 200 mesh sieves；
(3) by the powder of step (2) mix homogeneously 820 DEG C of pre-burnings, and it is incubated 6 hours, naturally cools to room temperature, then pulverize means by ball mill and make average diameter of particles be less than 2 μm, i.e. obtain Sr3Bi4V2O14Powder.
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| CN106807424A (en) * | 2017-03-14 | 2017-06-09 | 重庆工商大学 | A kind of carbonate bismuth oxyiodide composite catalyst and preparation method thereof |
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| CN103495411A (en) * | 2013-09-23 | 2014-01-08 | 桂林理工大学 | Visible-light response photocatalyst Sr2Bi3V3O14 and preparation method thereof |
| CN103495412A (en) * | 2013-09-23 | 2014-01-08 | 桂林理工大学 | Visible-light response photocatalyst SrBi3VO8 and preparation method thereof |
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| CN103495411A (en) * | 2013-09-23 | 2014-01-08 | 桂林理工大学 | Visible-light response photocatalyst Sr2Bi3V3O14 and preparation method thereof |
| CN103495412A (en) * | 2013-09-23 | 2014-01-08 | 桂林理工大学 | Visible-light response photocatalyst SrBi3VO8 and preparation method thereof |
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