CN103316651B - Visible-light-responded photocatalyst BaTi6Mg6O19 and preparation method thereof - Google Patents
Visible-light-responded photocatalyst BaTi6Mg6O19 and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a visible-light-responded titanate photocatalyst BaTi6Mg6O19 and a preparation method thereof. The chemical composition formula of the titanate photocatalyst is BaTi6Mg6O19. 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 photocatalyst Ba Ti
6mg
6o
19and 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.
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.
Summary of the invention
The object of this invention is to provide and a kind of there is visible light-responded titanate photocatalyst BaTi
6mg
6o
19and preparation method thereof.
The chemical constitution formula with visible light-responded titanate photocatalyst that the present invention relates to is: BaTi
6mg
6o
19.
Preparation method's concrete steps of above-mentioned visible light-responded titanate photocatalyst are:
(1) by 99.9% analytically pure chemical raw material BaCO
3, TiO
2and MgO, by BaTi
6mg
6o
19chemical 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 1200 ~ 1250 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 titanate BaTi
6mg
6o
19powder.
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; Titanate photocatalyst BaTi
6mg
6o
19addition 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 BaCO
3, TiO
2and MgO, by BaTi
6mg
6o
19chemical 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 1200 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 titanate BaTi
6mg
6o
19powder.
Prepared photochemical catalyst, under being greater than the radiation of visible light of 420nm, reaches 96.9% to methyl orange clearance in 120 minutes at wavelength.
Embodiment 2:
(1) by 99.9% analytically pure chemical raw material BaCO
3, TiO
2and MgO, by BaTi
6mg
6o
19chemical 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 1230 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 titanate BaTi
6mg
6o
19powder
Prepared photochemical catalyst, under being greater than the radiation of visible light of 420nm, reaches 98.5% to methyl orange clearance in 120 minutes at wavelength.
Embodiment 3:
(1) by 99.9% analytically pure chemical raw material BaCO
3, TiO
2and MgO, by BaTi
6mg
6o
19chemical 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 1250 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 titanate BaTi
6mg
6o
19powder
Prepared photochemical catalyst, be greater than the radiation of visible light of 420nm at wavelength under, 120min reaches 98.7% 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. titanate is as an application for visible light-responded photochemical catalyst, it is characterized in that the chemical constitution formula of described titanate is: BaTi
6mg
6o
19;
Preparation method's concrete steps of described titanate are:
(1) by 99.9% analytically pure chemical raw material BaCO
3, TiO
2and MgO, by BaTi
6mg
6o
19chemical 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 1200 ~ 1250 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 titanate BaTi
6mg
6o
19powder.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310255569.8A CN103316651B (en) | 2013-06-25 | 2013-06-25 | Visible-light-responded photocatalyst BaTi6Mg6O19 and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310255569.8A CN103316651B (en) | 2013-06-25 | 2013-06-25 | Visible-light-responded photocatalyst BaTi6Mg6O19 and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103316651A CN103316651A (en) | 2013-09-25 |
| CN103316651B true CN103316651B (en) | 2015-02-04 |
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ID=49185865
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| CN201310255569.8A Active CN103316651B (en) | 2013-06-25 | 2013-06-25 | Visible-light-responded photocatalyst BaTi6Mg6O19 and preparation method thereof |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105289573A (en) * | 2015-11-19 | 2016-02-03 | 桂林理工大学 | Photocatalyst Li2La2MgTiO7 capable of responding to visible light and preparation method thereof |
| CN106242532A (en) * | 2016-08-01 | 2016-12-21 | 桂林理工大学 | A kind of titanate SrTi3ga8o19application as temperature-stable microwave dielectric ceramic |
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|---|---|---|---|---|
| CN1124886C (en) * | 2001-09-17 | 2003-10-22 | 华南理工大学 | Photocatalyst and its preparing process |
| CN100480212C (en) * | 2007-07-26 | 2009-04-22 | 同济大学 | Ba1-XSrXTiO3-BaX6Ti6O19(X=Mg, zn) two-phase composite microwave ceramic material and its preparation method |
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