CN104324725A - Visible-light response light catalyst Li2Si3Ta8O27 and preparation method thereof - Google Patents
Visible-light response light catalyst Li2Si3Ta8O27 and preparation method thereof Download PDFInfo
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- CN104324725A CN104324725A CN201410565630.3A CN201410565630A CN104324725A CN 104324725 A CN104324725 A CN 104324725A CN 201410565630 A CN201410565630 A CN 201410565630A CN 104324725 A CN104324725 A CN 104324725A
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Abstract
The invention discloses a visible-light response light catalyst Li2Si3Ta8O27 and a preparation method thereof. The chemical composition formula of the light catalyst is Li2Si3Ta8O27. The invention also discloses a preparation method of the visible-light response light catalyst Li2Si3Ta8O27. The obtained light catalyst has the advantages of wide spectral response range, high light conversion rate, high stability and the like, and has the functions of decomposing harmful chemical substances and organic biomasses and killing bacteria under the irradiation of visible light; in addition, the preparation method is simple, the synthesis temperature is low, the cost is low, and the light catalyst is suitable for industrial production and application.
Description
Technical field
The present invention relates to a kind of visible light-responded photocatalyst Li
2si
3ta
8o
27and 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, 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 spectral response range is narrow, so it is very necessary for researching and developing the new visible light-responded high efficiency photocatalyst that has.We are to consisting of Li
2si
3ta
8o
27, Li
2si
3nb
8o
27, Li
2si
3v
8o
27compound carried out Photocatalytic Performance Study, found that Li
2si
3ta
8o
27band gap be 2.69eV, have excellent visible light-responded photocatalysis performance, the band gap width of other sample is all greater than 3.2eV, just can only can show activity under ultraviolet irradiation.
Summary of the invention
The object of this invention is to provide and a kind of there is visible light-responded photocatalyst Li
2si
3ta
8o
27and preparation method thereof.
The chemical constitution formula with visible light-responded photochemical catalyst that the present invention relates to is: Li
2si
3ta
8o
27.
Preparation method's concrete steps of above-mentioned visible light-responded photochemical catalyst are:
(1) by 99.9% analytically pure chemical raw material Li
2o, SiO
2and Ta
2o
5starting powder press Li
2si
3ta
8o
27composition weigh batching.
(2) raw material mixing step (1) prepared, put into ball grinder, add zirconia ball and distilled water, ball milling 8 hours, is mixed and finely ground, and takes out and dries, and crosses 200 mesh sieves.
(3) powder step (2) mixed 1100 ~ 1150 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 Li
2si
3ta
8o
27powder.
The spectral response range of the photochemical catalyst that the present invention obtains is wide, 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; Photocatalyst Li
2si
3ta
8o
27addition 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) by 99.9% analytically pure chemical raw material Li
2o, SiO
2and Ta
2o
5starting powder press Li
2si
3ta
8o
27composition weigh batching.
(2) raw material mixing step (1) prepared, put into ball grinder, add zirconia ball and distilled water, ball milling 8 hours, is mixed and finely ground, and takes out and dries, and crosses 200 mesh sieves.
(3) powder step (2) mixed 1100 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 Li
2si
3ta
8o
27powder.
Prepared photochemical catalyst, under being greater than the radiation of visible light of 420nm, reaches 97.6% to methyl orange clearance in 60 minutes at wavelength.
Embodiment 2:
(1) by 99.9% analytically pure chemical raw material Li
2o, SiO
2and Ta
2o
5starting powder press Li
2si
3ta
8o
27composition weigh batching.
(2) raw material mixing step (1) prepared, put into ball grinder, add zirconia ball and distilled water, ball milling 8 hours, is mixed and finely ground, and takes out and dries, and crosses 200 mesh sieves.
(3) powder step (2) mixed 1120 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 Li
2si
3ta
8o
27powder.
Prepared photochemical catalyst, under being greater than the radiation of visible light of 420nm, reaches 98.9% to methyl orange clearance in 60 minutes at wavelength.
Embodiment 3:
(1) by 99.9% analytically pure chemical raw material Li
2o, SiO
2and Ta
2o
5starting powder press Li
2si
3ta
8o
27composition weigh batching.
(2) raw material mixing step (1) prepared, put into ball grinder, add zirconia ball and distilled water, ball milling 8 hours, is mixed and finely ground, and takes out and dries, and crosses 200 mesh sieves.
(3) powder step (2) mixed 1150 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 Li
2si
3ta
8o
27powder.
Prepared photochemical catalyst, be greater than the radiation of visible light of 420nm at wavelength under, 60min reaches 98.2% 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 Li
2si
3ta
8o
27;
Preparation method's concrete steps of described photochemical catalyst are:
(1) by 99.9% analytically pure chemical raw material Li
2o, SiO
2and Ta
2o
5starting powder press Li
2si
3ta
8o
27composition weigh batching;
(2) raw material mixing step (1) prepared, put into ball grinder, add zirconia ball and distilled water, ball milling 8 hours, is mixed and finely ground, and takes out and dries, and crosses 200 mesh sieves;
(3) powder step (2) mixed 1100 ~ 1150 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 Li
2si
3ta
8o
27powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410565630.3A CN104324725B (en) | 2014-10-22 | 2014-10-22 | Visible light-responded photocatalyst Li2si3ta8o27and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410565630.3A CN104324725B (en) | 2014-10-22 | 2014-10-22 | Visible light-responded photocatalyst Li2si3ta8o27and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104324725A true CN104324725A (en) | 2015-02-04 |
| CN104324725B CN104324725B (en) | 2016-08-24 |
Family
ID=52399603
Family Applications (1)
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|---|---|---|---|
| CN201410565630.3A Active CN104324725B (en) | 2014-10-22 | 2014-10-22 | Visible light-responded photocatalyst Li2si3ta8o27and preparation method thereof |
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| CN (1) | CN104324725B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104722310A (en) * | 2015-03-06 | 2015-06-24 | 三峡大学 | Visible-light-responded photocatalyst LiCu2Ta7O20 and preparation method thereof |
| CN104741129A (en) * | 2015-03-06 | 2015-07-01 | 三峡大学 | Visible light responding photocatalyst LiCuTa5O14 and preparation method thereof |
| CN104785241A (en) * | 2015-04-21 | 2015-07-22 | 桂林理工大学 | Visible light responsible photocatalyst CaSiV2O8 and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6319430B1 (en) * | 1997-07-25 | 2001-11-20 | Crystal Technology, Inc. | Preconditioned crystals of lithium niobate and lithium tantalate and method of preparing the same |
| CN103157458A (en) * | 2013-04-01 | 2013-06-19 | 桂林理工大学 | Visible-light-responsive tantalate photocatalyst LiMTa3O9 and preparation method thereof |
| CN104078665A (en) * | 2013-03-26 | 2014-10-01 | 株式会社东芝 | Active material for battery, nonaqueous electrolyte battery, battery pack, and method for manufacturing active material for battery |
| CN104096556A (en) * | 2014-06-30 | 2014-10-15 | 桂林理工大学 | Visible-light responded photocatalyst Li2ZnTa207 and preparation method thereof |
-
2014
- 2014-10-22 CN CN201410565630.3A patent/CN104324725B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6319430B1 (en) * | 1997-07-25 | 2001-11-20 | Crystal Technology, Inc. | Preconditioned crystals of lithium niobate and lithium tantalate and method of preparing the same |
| CN104078665A (en) * | 2013-03-26 | 2014-10-01 | 株式会社东芝 | Active material for battery, nonaqueous electrolyte battery, battery pack, and method for manufacturing active material for battery |
| CN103157458A (en) * | 2013-04-01 | 2013-06-19 | 桂林理工大学 | Visible-light-responsive tantalate photocatalyst LiMTa3O9 and preparation method thereof |
| CN104096556A (en) * | 2014-06-30 | 2014-10-15 | 桂林理工大学 | Visible-light responded photocatalyst Li2ZnTa207 and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104722310A (en) * | 2015-03-06 | 2015-06-24 | 三峡大学 | Visible-light-responded photocatalyst LiCu2Ta7O20 and preparation method thereof |
| CN104741129A (en) * | 2015-03-06 | 2015-07-01 | 三峡大学 | Visible light responding photocatalyst LiCuTa5O14 and preparation method thereof |
| CN104785241A (en) * | 2015-04-21 | 2015-07-22 | 桂林理工大学 | Visible light responsible photocatalyst CaSiV2O8 and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104324725B (en) | 2016-08-24 |
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Effective date of registration: 20201210 Address after: No.25-1, Gangcheng Road, dongyinggang Economic Development Zone, Hekou District, Dongying City, Shandong Province Patentee after: Shandong Xingqiang Chemical Industry Technology Research Institute Co.,Ltd. Address before: Room 502, building 1, No. 40, xiayuangang East Street, Tianhe District, Guangzhou City, Guangdong Province Patentee before: Guangzhou Boyi Intellectual Property Operation Co.,Ltd. Effective date of registration: 20201210 Address after: Room 502, building 1, No. 40, xiayuangang East Street, Tianhe District, Guangzhou City, Guangdong Province Patentee after: Guangzhou Boyi Intellectual Property Operation Co.,Ltd. Address before: 541004 the Guangxi Zhuang Autonomous Region Guilin Construction Road No. 12 Patentee before: GUILIN University OF TECHNOLOGY |
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