CN105536767A - Visible-light response photocatalyst SrLi2Ge7O16 and preparing method thereof - Google Patents
Visible-light response photocatalyst SrLi2Ge7O16 and preparing method thereof Download PDFInfo
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- CN105536767A CN105536767A CN201610017450.0A CN201610017450A CN105536767A CN 105536767 A CN105536767 A CN 105536767A CN 201610017450 A CN201610017450 A CN 201610017450A CN 105536767 A CN105536767 A CN 105536767A
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- 239000011941 photocatalyst Substances 0.000 title abstract description 9
- 238000000034 method Methods 0.000 title abstract 4
- 239000000126 substance Substances 0.000 claims abstract description 7
- 239000003054 catalyst Substances 0.000 claims description 26
- 239000000843 powder Substances 0.000 claims description 18
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 229910005793 GeO 2 Inorganic materials 0.000 claims description 5
- 238000000498 ball milling Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000001954 sterilising effect Effects 0.000 abstract description 3
- 238000004659 sterilization and disinfection Methods 0.000 abstract description 3
- 238000003786 synthesis reaction Methods 0.000 abstract description 3
- 238000009776 industrial production Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 230000003595 spectral effect Effects 0.000 abstract description 2
- 239000002028 Biomass Substances 0.000 abstract 1
- 230000001699 photocatalysis Effects 0.000 description 9
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical group O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 7
- 238000007146 photocatalysis Methods 0.000 description 5
- 230000003292 diminished effect Effects 0.000 description 4
- 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
- 239000011159 matrix material Substances 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 239000004408 titanium dioxide Substances 0.000 description 3
- 239000003905 agrochemical Substances 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000003205 fragrance Substances 0.000 description 2
- 238000010532 solid phase synthesis reaction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 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
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- RHDUVDHGVHBHCL-UHFFFAOYSA-N niobium tantalum Chemical class [Nb].[Ta] RHDUVDHGVHBHCL-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000012071 phase Substances 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
- 230000035922 thirst Effects 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
Classifications
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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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/14—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of germanium, tin or lead
-
- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
-
- 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
-
- 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
-
- 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
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
-
- 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
- C02F2101/34—Organic compounds containing oxygen
-
- 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
- C02F2101/38—Organic compounds containing nitrogen
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
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Abstract
The invention discloses a wideband and efficient visible-light response photocatalyst SrLi2Ge7O16 and a preparing method thereof. The chemical constitution formula of the photocatalyst is SrLi2Ge7O16. The invention further discloses the preparing method of the material. The obtained photocatalyst has the advantages of being wide in spectral response range, high in light conversion efficiency, good in stability and the like and has the effects of decomposing harmful chemical substances and organic biomass and conducting sterilization. In addition, the preparing method is simple, low in synthesis temperature and cost and suitable for industrial production and application.
Description
Technical field
The present invention relates to a kind of visible light-responded photochemical catalyst SrLi
2ge
7o
16and preparation method thereof, belong to inorganic field of photocatalytic material.
Background technology
Along with socioeconomic development, people more and more 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 to utilize in photochemical catalyst decomposition water and the organic matter such as agricultural chemicals in air and odorant, and scribble the application example such as self-cleaning of the surface of solids of photochemical catalyst.The principle of light-catalyzed reaction is that photochemical catalyst is after absorbing the photon higher than its band-gap energy, generate hole and electronics, these holes and electronics carry out oxidation reaction and reduction reaction respectively, reach the object of decomposing harmful chemical, organic-biological matter and sterilization.Photochemical catalyst has many kinds, and wherein most representative is titanium dioxide (TiO
2), titanium dioxide has been utilized to decompose organic matters such as the agricultural chemicals in water and in air and odorants, but the band gap of titanium dioxide is 3.2eV, only under the ultraviolet irradiation shorter than 400nm, just activity can be shown, can only at indoor or the local work having uviol lamp, almost can not utilize visible ray, this limits the use of titanium dioxide optical catalyst greatly.
Consider the practicality of photochemical catalyst in decomposing harmful substances, utilize sunshine to be indispensable as light source.Irradiate maximum to sunshine medium wavelength intensity of visible ray near 500nm on earth's surface, wavelength is the energy of the visible region of 400nm ~ 750nm is approximately 43% of sunshine gross energy, so in order to efficient utilization, the R and D of bismuth series photocatalyst have achieved a series of great achievement, and bismuthous compound is as BiVO
4, Bi
2moO
6, Bi
2mo
2o
9, Bi
2mo
3o
12and Bi
2wO
4be in the news and there is good absorption under visible light.A series of niobium (tantalum) hydrochlorate photochemical catalyst is widely studied owing to having higher photocatalytic activity.Such as, niobate photocatalyst Pb
3nb
4o
13, BiNbO
4and Bi
2mNbO
7(M=Al, Ga, In, Y, rare earth element and Fe) etc. with niobium potassium compound oxide photocatalyst as KNbO
3, KNb
3o
8, K
4nb
6o
17and K
6nb
10.6o
30deng all, there is good photocatalysis performance, but its intrinsic photocatalytic effect is very weak or do not have activity in visible-range.
Although photocatalysis research has carried out the several years, the current exploration to visible light-responded photochemical catalyst is the summary of experience drawn by great many of experiments with exploitation major part, in theory also cannot from the crystal structure of compound, composition, the physicochemical properties such as molecular weight are predicted its photocatalysis performance, therefore at present report to have visible light-responded photochemical catalyst kind still very limited, and it is low to there is light conversion efficiency, synthesis difficulty, poor stability and the problem such as spectral response range is narrow, research and develop that new preparation method is simple and to have the visible light-responded high efficiency photocatalyst of wideband be that this area scientific and technical personnel thirst for solving always but are difficult to the difficult problem that succeeds all the time, which greatly limits extensive use and the development of photochemical catalyst.We are to consisting of SrLi
2ge
7o
16, BaLi
2ge
7o
16and CaLi
2ge
7o
16sample carried out Photocatalytic Performance Study.Found that SrLi
2ge
7o
16band gap width is 2.59eV, has excellent visible light-responded photocatalysis performance; BaLi
2ge
7o
16and CaLi
2ge
7o
16for insulator, under ultraviolet irradiation, also do not show activity.
Summary of the invention
The object of this invention is to provide and a kind of there is visible light-responded photochemical catalyst SrLi
2ge
7o
16and preparation method thereof.
The chemical constitution formula with visible light-responded photochemical catalyst that the present invention relates to is: SrLi
2ge
7o
16.
Preparation method's concrete steps of above-mentioned visible light-responded photochemical catalyst are:
(1) by 99.9% analytically pure chemical raw material SrCO
3, Li
2cO
3and GeO
2powder press SrLi
2ge
7o
16composition weigh batching.
(2) raw material mixing step (1) prepared, put into ball grinder, add zirconia ball and absolute ethyl alcohol, ball milling 8 hours, is mixed and finely ground, and takes out and dries, and crosses 200 mesh sieves.
(3) powder step (2) mixed 700 ~ 750 DEG C of pre-burnings, and is incubated 6 hours, naturally cools to room temperature, is then pulverized by ball mill and average diameter of particles is diminished, lower than 2 μm, namely obtain SrLi
2ge
7o
16powder.
Advantage of the present invention: SrLi
2ge
7o
16the visible light-responded wide frequency range of photochemical catalyst, the high and good stability of light conversion efficiency, has the effect of decomposing harmful chemical, organic-biological matter and sterilization under visible light illumination; Preparation method is simple in addition, synthesis temperature is low, and cost is low, is applicable to industrial production and application.
Detailed description of the invention
To be specifically described the present invention below:
1, in order to obtain the composite oxides used in the present invention, first use solid-phase synthesis to prepare powder, namely using as the various oxide of raw material or carbonate according to the metering of target constitutional chemistry than mixing, then to synthesize in air atmosphere at ambient pressure.
2, in order to effectively utilize light, the size of the photochemical catalyst in the present invention is preferably in micron level, or even nano particle, and specific area is larger.With oxide powder prepared by solid-phase synthesis, its particle is comparatively large and surface area is less, but can pulverize means by ball mill makes particle diameter diminish.
3, photocatalysis experiment of the present invention is using methyl orange as simulation organic pollution, and its concentration is 20mg/L; Photochemical catalyst SrLi
2ge
7o
16addition be 1g/L; Light source uses the xenon lamp of 300W, the vessel that reactive tank uses pyrex to make, and obtains the light that wavelength is greater than 420nm, then irradiate photochemical catalyst by wave filter; Catalysis time is set as 60 minutes.
Embodiment 1:
(1) pure chemistry raw material SrCO will be analyzed
3, Li
2cO
3and GeO
2powder press SrLi
2ge
7o
16composition weigh batching.
(2) raw material mixing step (1) prepared, put into ball grinder, add zirconia ball and absolute ethyl alcohol, ball milling 8 hours, is mixed and finely ground, and takes out and dries, and crosses 200 mesh sieves.
(3) powder step (2) mixed 700 DEG C of pre-burnings, and is incubated 6 hours, naturally cools to room temperature, is then pulverized by ball mill and average diameter of particles is diminished, lower than 2 μm, namely obtain SrLi
2ge
7o
16powder.
Prepared photochemical catalyst, under being greater than the radiation of visible light of 420nm, reaches 97.4% to methyl orange clearance in 60 minutes at wavelength.
Embodiment 2:
(1) pure chemistry raw material SrCO will be analyzed
3, Li
2cO
3and GeO
2powder press SrLi
2ge
7o
16composition weigh batching.
(2) raw material mixing step (1) prepared, put into ball grinder, add zirconia ball and absolute ethyl alcohol, ball milling 8 hours, is mixed and finely ground, and takes out and dries, and crosses 200 mesh sieves.
(3) powder step (2) mixed 720 DEG C of pre-burnings, and is incubated 6 hours, naturally cools to room temperature, is then pulverized by ball mill and average diameter of particles is diminished, lower than 2 μm, namely obtain SrLi
2ge
7o
16powder.
Prepared photochemical catalyst, under being greater than the radiation of visible light of 420nm, reaches 98.5% to methyl orange clearance in 60 minutes at wavelength.
Embodiment 3:
(1) pure chemistry raw material SrCO will be analyzed
3, Li
2cO
3and GeO
2powder press SrLi
2ge
7o
16composition weigh batching.
(2) raw material mixing step (1) prepared, put into ball grinder, add zirconia ball and absolute ethyl alcohol, ball milling 8 hours, is mixed and finely ground, and takes out and dries, and crosses 200 mesh sieves.
(3) powder step (2) mixed 750 DEG C of pre-burnings, and is incubated 6 hours, naturally cools to room temperature, is then pulverized by ball mill and average diameter of particles is diminished, lower than 2 μm, namely obtain SrLi
2ge
7o
16powder.
Prepared photochemical catalyst, be greater than the radiation of visible light of 420nm at wavelength under, 60min reaches 98.0% to methyl orange clearance.
The present invention is never limited to above embodiment.Bound, the interval value of each temperature can realize the present invention, do not enumerate embodiment at this.
The made photocatalyst powder of above inventive embodiments can be carried on multiple matrix surface.Matrix can be glass, pottery, active carbon or quartz sand etc., and photochemical catalyst can be carried on matrix surface in the form of a film.
Claims (1)
1. a visible light-responded photochemical catalyst, is characterized in that the chemical constitution formula of described photochemical catalyst is SrLi
2ge
7o
16;
Preparation method's concrete steps of described photochemical catalyst are:
(1) pure chemistry raw material SrCO will be analyzed
3, Li
2cO
3and GeO
2powder press SrLi
2ge
7o
16composition weigh batching;
(2) raw material mixing step (1) prepared, put into ball grinder, add zirconia ball and absolute ethyl alcohol, ball milling 8 hours, is mixed and finely ground, and takes out and dries, and crosses 200 mesh sieves;
(3) powder step (2) mixed 700 ~ 750 DEG C of pre-burnings, and is incubated 6 hours, naturally cools to room temperature, is then pulverized by ball mill and makes average diameter of particles lower than 2 μm, namely obtain SrLi
2ge
7o
16powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610017450.0A CN105536767A (en) | 2016-01-12 | 2016-01-12 | Visible-light response photocatalyst SrLi2Ge7O16 and preparing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610017450.0A CN105536767A (en) | 2016-01-12 | 2016-01-12 | Visible-light response photocatalyst SrLi2Ge7O16 and preparing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105536767A true CN105536767A (en) | 2016-05-04 |
Family
ID=55816604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610017450.0A Pending CN105536767A (en) | 2016-01-12 | 2016-01-12 | Visible-light response photocatalyst SrLi2Ge7O16 and preparing method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN105536767A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102068954A (en) * | 2009-11-24 | 2011-05-25 | 中国科学院物理研究所 | Method and device for photocatalytic reaction |
| CN102240542A (en) * | 2011-04-13 | 2011-11-16 | 桂林理工大学 | Visible-light-responsive composite oxide photochemical catalyst Li2SrNb(2-x)TaxO7 and preparation method thereof |
-
2016
- 2016-01-12 CN CN201610017450.0A patent/CN105536767A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102068954A (en) * | 2009-11-24 | 2011-05-25 | 中国科学院物理研究所 | Method and device for photocatalytic reaction |
| CN102240542A (en) * | 2011-04-13 | 2011-11-16 | 桂林理工大学 | Visible-light-responsive composite oxide photochemical catalyst Li2SrNb(2-x)TaxO7 and preparation method thereof |
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