CN103316686B - Visible-light-responded photocatalyst SrCu2V2O8 and preparation method thereof - Google Patents
Visible-light-responded photocatalyst SrCu2V2O8 and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a visible-light-responded vanadate photocatalyst SrCu2V2O8 and a preparation method thereof. The chemical composition formula of the vanadate photocatalyst is SrCu2V2O8. The invention further discloses the preparation method of the photocatalyst. According to the photocatalyst and the preparation method thereof, the preparation method is simple and is low in cost, and the prepared photocatalyst has excellent catalysis performance, plays a role in decomposing harmful chemical substances under the irradiation of visible light and is good in stability, thereby having good application prospects.
Description
Technical field
The present invention relates to a kind of visible light-responded photochemical catalyst SrCu
2v
2o
8and 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.
Although photocatalysis research has carried out the several years, but at present report to have visible light-responded photochemical catalyst kind still very limited, still also exist that light conversion efficiency is low, poor stability and the problem such as spectrum respective range is narrow, so it is very necessary for researching and developing the new visible light-responded high efficiency photocatalyst that has.Document [Crystal growth of large spin gap material BaCu2V2O8 by top-seeded method, Journal of Crystal Growth 274 (2005) 486 – 488] reports One-dimensional Quantum spin material BaCu
2v
2o
8crystal structure and growth characteristics, but the research had not yet to see about this compound photocatalysis performance is reported.We are to vanadate BaCu
2v
2o
8carry out Photocatalytic Performance Study, found that it does not have visible light-responded photocatalysis characteristic, but surprisingly find SrCu
2v
2o
8there is excellent visible light-responded photocatalysis performance.
Summary of the invention
The object of this invention is to provide and a kind of there is visible light-responded photochemical catalyst SrCu
2v
2o
8and preparation method thereof.
The chemical constitution formula with visible light-responded vanadate photocatalyst that the present invention relates to is: SrCu
2v
2o
8.
Preparation method's concrete steps of above-mentioned visible light-responded vanadate photocatalyst are:
(1) by 99.9% analytically pure chemical raw material SrCO
3, CuO and V
2o
5, by SrCu
2v
2o
8chemical formula 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 580 ~ 620 DEG C of pre-burnings, and is incubated 6 hours, naturally cools to room temperature, then by pulverizing means such as ball mills, particle diameter is diminished, and lower than 2 μm, namely obtains vanadate SrCu
2v
2o
8powder.
Preparation method of the present invention is simple, cost is low, and the photochemical catalyst of preparation has excellent catalytic performance, has the effect of decomposing harmful chemical, organic-biological matter and sterilization under visible light illumination.
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 particle diameter can be diminished by pulverizing means such as ball mills.
3, photocatalysis experiment of the present invention is using methyl orange as simulation organic pollution, and its concentration is 20mg/L; Vanadate photocatalyst SrCu
2v
2o
8addition 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 long wavelength, then irradiate photochemical catalyst by wave filter; Catalysis time is set as 120 minutes.
Embodiment 1:
(1) by 99.9% analytically pure chemical raw material SrCO
3, CuO and V
2o
5, by SrCu
2v
2o
8chemical formula 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 580 DEG C of pre-burnings, and is incubated 6 hours, naturally cools to room temperature, then pulverizes means by ball mill and particle diameter is diminished, lower than 2 μm, namely obtain vanadate SrCu
2v
2o
8powder.
Prepared photochemical catalyst, under being greater than the radiation of visible light of 420nm, reaches 98.7% to methyl orange clearance in 120 minutes at wavelength.
Embodiment 2:
(1) by 99.9% analytically pure chemical raw material SrCO
3, CuO and V
2o
5, by SrCu
2v
2o
8chemical formula 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 600 DEG C of pre-burnings, and is incubated 6 hours, naturally cools to room temperature, then pulverizes means by ball mill and particle diameter is diminished, lower than 2 μm, namely obtain vanadate SrCu
2v
2o
8powder.
Prepared photochemical catalyst, under being greater than the radiation of visible light of 420nm, reaches 98.9% to methyl orange clearance in 120 minutes at wavelength.
Embodiment 3:
(1) by 99.9% analytically pure chemical raw material SrCO
3, CuO and V
2o
5, by SrCu
2v
2o
8chemical formula 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 620 DEG C of pre-burnings, and is incubated 6 hours, naturally cools to room temperature, then pulverizes means by ball mill and particle diameter is diminished, lower than 2 μm, namely obtain vanadate SrCu
2v
2o
8powder.
Prepared photochemical catalyst, be greater than the radiation of visible light of 420nm at wavelength under, 120min reaches 99.1% 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. vanadate is as an application for visible light-responded photochemical catalyst, it is characterized in that the chemical constitution formula of described vanadate is: SrCu
2v
2o
8;
Preparation method's concrete steps of described vanadate are:
(1) by 99.9% analytically pure chemical raw material SrCO
3, CuO and V
2o
5, by SrCu
2v
2o
8chemical formula 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 580 ~ 620 DEG C of pre-burnings, and is incubated 6 hours, naturally cools to room temperature, then pulverizes means by ball mill and particle diameter is diminished, lower than 2 μm, namely obtain vanadate SrCu
2v
2o
8powder.
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| CN201310252467.0A CN103316686B (en) | 2013-06-24 | 2013-06-24 | Visible-light-responded photocatalyst SrCu2V2O8 and preparation method thereof |
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| CN103316686B true CN103316686B (en) | 2015-04-15 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103480383B (en) * | 2013-10-12 | 2015-06-10 | 桂林理工大学 | Visible-light-responsive photocatalyst Sr2CuBi2O6 and preparation method thereof |
| CN103551158B (en) * | 2013-11-11 | 2016-05-18 | 桂林理工大学 | Visible light-responded photochemical catalyst SrV2Ta2O11And preparation method thereof |
| CN103551140B (en) * | 2013-11-11 | 2016-03-02 | 桂林理工大学 | Visible light-responded photochemical catalyst Sr 6w 2v 2o 17and preparation method thereof |
| CN103706352B (en) * | 2013-11-17 | 2016-03-02 | 桂林理工大学 | Visible light-responded photochemical catalyst SrLa 10v 4o 26and preparation method thereof |
| CN104069866A (en) * | 2014-06-30 | 2014-10-01 | 桂林理工大学 | Photocatalyst LiCu2V3O10 in response to visible light and preparation method thereof |
| CN104815643A (en) * | 2015-04-21 | 2015-08-05 | 桂林理工大学 | Visible light response photocatalyst BaLaV3O10 and preparation method thereof |
| CN104907077A (en) * | 2015-05-23 | 2015-09-16 | 桂林理工大学 | Visible-light-responsive photocatalyst SrLi3FeV8O24 and preparation method thereof |
| CN105289635A (en) * | 2015-11-26 | 2016-02-03 | 桂林理工大学 | Visible light response photocatalyst Na2Cu3B2V2O12 and preparation method thereof |
| CN105582942A (en) * | 2015-12-26 | 2016-05-18 | 桂林理工大学 | Visible-light-responding photocatalyst SrCu2Ge2O7 and preparation method thereof |
| CN105562016A (en) * | 2015-12-26 | 2016-05-11 | 桂林理工大学 | Visible light responding photocatalyst SrCu3Ge4O12 and preparation method thereof |
| CN115414941B (en) * | 2022-08-03 | 2024-02-13 | 桂林电子科技大学 | Metal oxide material containing copper vacancy and oxygen vacancy, preparation method and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110155971A1 (en) * | 2009-12-14 | 2011-06-30 | Board of Regents of the Nevada System of Higher Education, | Hydrothermal synthesis of nanocubes of sillenite type compounds for photovoltaic applications and solar energy conversion of carbon dioxide to fuels |
-
2013
- 2013-06-24 CN CN201310252467.0A patent/CN103316686B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110155971A1 (en) * | 2009-12-14 | 2011-06-30 | Board of Regents of the Nevada System of Higher Education, | Hydrothermal synthesis of nanocubes of sillenite type compounds for photovoltaic applications and solar energy conversion of carbon dioxide to fuels |
Non-Patent Citations (2)
| Title |
|---|
| Crystal growth of large spin gap material BaCu2V2O8 by top-seeded method;Zhangzhen He et al.;《Journal of Crystal Growth》;20041130;第274卷;第486-488页 * |
| 液相沉淀法制备钒酸铁纳米光催化剂及其光催化性能研究;王敏;《中国博士学位论文全文数据库 工程科技I辑》;20091215(第12期);第27页 * |
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