CN103877967A - Visible-light response photocatalyst Li3Nb3Bi2O12 and preparation method thereof - Google Patents
Visible-light response photocatalyst Li3Nb3Bi2O12 and preparation method thereof Download PDFInfo
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- CN103877967A CN103877967A CN201410135691.6A CN201410135691A CN103877967A CN 103877967 A CN103877967 A CN 103877967A CN 201410135691 A CN201410135691 A CN 201410135691A CN 103877967 A CN103877967 A CN 103877967A
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Abstract
The invention discloses a visible-light response photocatalyst Li3Nb3Bi2O12 and a preparation method thereof. The chemical composition formula of the photocatalyst is Li3Nb3Bi2O12. 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 Li
3nb
3bi
2o
12and 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 and be realize sustainable development, improve people's living standard and safeguard national security in the urgent need to.
From phase late 1970s, people proposed to utilize in photochemical catalyst decomposition water and atmosphere in the organic matter such as agricultural chemicals 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 the photon having absorbed higher than its band-gap energy, hole and electronics are generated, these holes and electronics carry out respectively oxidation reaction and reduction reaction, 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), utilize titanium dioxide to decompose the organic matter such as agricultural chemicals and odorant in water and in atmosphere, but the band gap of titanium dioxide is 3.2eV, only under the ultraviolet irradiation shorter than 400nm, just can show activity, can only be indoor or have a local work of uviol lamp, almost can not utilize visible ray, this has limited the use of titanium dioxide optical catalyst greatly.
Consider the practicality of photochemical catalyst in decomposing harmful substances, utilizing sunshine is indispensable as light source.Irradiate near sunshine medium wavelength visible light intensity maximum 500nm to earth's surface, wavelength is that the energy of the visible region of 400nm ~ 750nm is approximately 43% of sunshine gross energy, so for efficient utilization, the R and D of bismuth series photocatalyst have obtained a series of great achievements, and bismuthous compound is as BiVO
4, Bi
2moO
6, Bi
2mo
2o
9, Bi
2mo
3o
12and Bi
2wO
4be reported in and under visible ray, there is good absorption.A series of niobiums (tantalum) hydrochlorate photochemical catalyst is because the photocatalytic activity having compared with high is widely studied.For example, 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 thering is good photocatalysis performance.
Although photocatalysis research has been carried out the several years, but at present report to have visible light-responded photochemical catalyst kind still very limited, still exist that light conversion efficiency is low, poor stability and the problem such as spectrum respective range is narrow, be very necessary so research and develop the new visible light-responded high efficiency photocatalyst that has.We are to noval chemical compound Li
3nb
3bi
2o
12carry out Photocatalytic Performance Study, found that Li
3nb
3bi
2o
12there is excellent visible light-responded photocatalysis performance.
Summary of the invention
The object of this invention is to provide a kind of visible light-responded photocatalyst Li that has
3nb
3bi
2o
12and preparation method thereof.
The chemical composition general formula with visible light-responded photochemical catalyst the present invention relates to is: Li
3nb
3bi
2o
12.
Preparation method's concrete steps of above-mentioned visible light-responded photochemical catalyst are:
(1) by 99.9% analytically pure chemical raw material Li
2cO
3, Nb
2o
5and Bi
2o
3, by Li
3nb
3bi
2o
12chemical formula weigh batching.
(2) raw material step (1) being prepared mixes, and puts into ball grinder, adds zirconia ball and absolute ethyl alcohol, and ball milling 8 hours, is mixed and finely ground, and takes out and dries, and crosses 200 mesh sieves.
(3) powder step (2) being mixed is 700 ~ 720 DEG C of pre-burnings, and is incubated 6 hours, naturally cools to room temperature, then by ball mill pulverizing means, average diameter of particles diminished, and lower than 2 μ m, obtains Li
3nb
3bi
2o
12powder.
Preparation method of the present invention is simple, cost is low, and the photochemical catalyst of preparation has good catalytic performance, has the effect of decomposing harmful chemical, organic-biological matter and sterilization under radiation of visible light.
Detailed description of the invention
To be specifically described the present invention below:
1, the composite oxides in order to obtain using in the present invention, first use solid-phase synthesis to prepare powder, various oxides or carbonate as raw material measured than mixing according to target constitutional chemistry, more synthetic in air atmosphere under normal pressure.
2, in order effectively to 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.The oxide powder of preparing with solid-phase synthesis, its particle is compared with large and surface area is less, but can particle diameter be diminished by ball mill pulverizing means.
3, photocatalysis experiment of the present invention is using methyl orange as simulation organic pollution, and its concentration is 20mg/L; Photocatalyst Li
3nb
3bi
2o
12addition be 1g/L; Light source uses the xenon lamp of 300W, and the vessel that reactive tank uses pyrex to make, obtain by wave filter the light that wavelength is greater than 420nm long wavelength, then light irradiation catalyst; Catalysis time is set as 120 minutes.
Embodiment 1:
(1) by 99.9% analytically pure chemical raw material Li
2cO
3, Nb
2o
5and Bi
2o
3, by Li
3nb
3bi
2o
12chemical formula weigh batching.
(2) raw material step (1) being prepared mixes, and puts into ball grinder, adds zirconia ball and absolute ethyl alcohol, and ball milling 8 hours, is mixed and finely ground, and takes out and dries, and crosses 200 mesh sieves.
(3) powder step (2) being mixed is 700 DEG C of pre-burnings, and is incubated 6 hours, naturally cools to room temperature, then by ball mill pulverizing means, average diameter of particles diminished, and lower than 2 μ m, obtains Li
3nb
3bi
2o
12powder.
Prepared photochemical catalyst, is greater than at wavelength under the radiation of visible light of 420nm, methyl orange clearance is reached to 97.2% in 120 minutes.
Embodiment 2:
(1) by 99.9% analytically pure chemical raw material Li
2cO
3, Nb
2o
5and Bi
2o
3, by Li
3nb
3bi
2o
12chemical formula weigh batching.
(2) raw material step (1) being prepared mixes, and puts into ball grinder, adds zirconia ball and absolute ethyl alcohol, and ball milling 8 hours, is mixed and finely ground, and takes out and dries, and crosses 200 mesh sieves.
(3) powder step (2) being mixed is 710 DEG C of pre-burnings, and is incubated 6 hours, naturally cools to room temperature, then by ball mill pulverizing means, average diameter of particles diminished, and lower than 2 μ m, obtains Li
3nb
3bi
2o
12powder.
Prepared photochemical catalyst, is greater than at wavelength under the radiation of visible light of 420nm, methyl orange clearance is reached to 98.0% in 120 minutes.
Embodiment 3:
(1) by 99.9% analytically pure chemical raw material Li
2cO
3, Nb
2o
5and Bi
2o
3, by Li
3nb
3bi
2o
12chemical formula weigh batching.
(2) raw material step (1) being prepared mixes, and puts into ball grinder, adds zirconia ball and absolute ethyl alcohol, and ball milling 8 hours, is mixed and finely ground, and takes out and dries, and crosses 200 mesh sieves.
(3) powder step (2) being mixed is 720 DEG C of pre-burnings, and is incubated 6 hours, naturally cools to room temperature, then by ball mill pulverizing means, average diameter of particles diminished, and lower than 2 μ m, obtains Li
3nb
3bi
2o
12powder.
Prepared photochemical catalyst, is greater than at wavelength under the radiation of visible light of 420nm, and 120min reaches 97.4% 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 with the form of film.
Claims (1)
1. a visible light-responded photochemical catalyst, is characterized in that the chemical constitution formula of described photochemical catalyst is: Li
3nb
3bi
2o
12;
Preparation method's concrete steps of described photochemical catalyst are:
(1) by 99.9% analytically pure chemical raw material Li
2cO
3, Nb
2o
5and Bi
2o
3, by Li
3nb
3bi
2o
12chemical formula weigh batching;
(2) raw material step (1) being prepared mixes, and puts into ball grinder, adds zirconia ball and absolute ethyl alcohol, and ball milling 8 hours, is mixed and finely ground, and takes out and dries, and crosses 200 mesh sieves;
(3) powder step (2) being mixed is 700 ~ 720 DEG C of pre-burnings, and is incubated 6 hours, naturally cools to room temperature, then makes average diameter of particles lower than 2 μ m by ball mill pulverizing means, obtains Li
3nb
3bi
2o
12powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410135691.6A CN103877967B (en) | 2014-04-07 | 2014-04-07 | Visible light-responded photocatalyst Li 3nb 3bi 2o 12and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410135691.6A CN103877967B (en) | 2014-04-07 | 2014-04-07 | Visible light-responded photocatalyst Li 3nb 3bi 2o 12and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103877967A true CN103877967A (en) | 2014-06-25 |
| CN103877967B CN103877967B (en) | 2016-01-13 |
Family
ID=50947288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410135691.6A Active CN103877967B (en) | 2014-04-07 | 2014-04-07 | Visible light-responded photocatalyst Li 3nb 3bi 2o 12and preparation method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN103877967B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104368330A (en) * | 2014-10-21 | 2015-02-25 | 桂林理工大学 | Photocatalyst Li2Bi3Nb7O23 with visible light response and preparation method thereof |
| CN104437465A (en) * | 2014-12-28 | 2015-03-25 | 桂林理工大学 | Visible light responded photocatalyst LiNb2BO7 and preparation method thereof |
| CN110605112A (en) * | 2019-05-10 | 2019-12-24 | 盐城工学院 | Lithium oxide photocatalytic material and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101612561A (en) * | 2009-07-19 | 2009-12-30 | 桂林理工大学 | Visible light-responded bismuth-system compound oxide photocatalyst and preparation method thereof |
| CN102600828A (en) * | 2012-02-08 | 2012-07-25 | 桂林理工大学 | Visible light responded composite oxide photocatalyst LiBiTiO4 and its preparation method |
-
2014
- 2014-04-07 CN CN201410135691.6A patent/CN103877967B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101612561A (en) * | 2009-07-19 | 2009-12-30 | 桂林理工大学 | Visible light-responded bismuth-system compound oxide photocatalyst and preparation method thereof |
| CN102600828A (en) * | 2012-02-08 | 2012-07-25 | 桂林理工大学 | Visible light responded composite oxide photocatalyst LiBiTiO4 and its preparation method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104368330A (en) * | 2014-10-21 | 2015-02-25 | 桂林理工大学 | Photocatalyst Li2Bi3Nb7O23 with visible light response and preparation method thereof |
| CN104368330B (en) * | 2014-10-21 | 2016-09-28 | 桂林理工大学 | Visible light-responded photocatalyst Li2bi3nb7o23and preparation method thereof |
| CN104437465A (en) * | 2014-12-28 | 2015-03-25 | 桂林理工大学 | Visible light responded photocatalyst LiNb2BO7 and preparation method thereof |
| CN110605112A (en) * | 2019-05-10 | 2019-12-24 | 盐城工学院 | Lithium oxide photocatalytic material and preparation method thereof |
| CN110605112B (en) * | 2019-05-10 | 2022-07-19 | 盐城工学院 | Lithium oxide photocatalytic material and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN103877967B (en) | 2016-01-13 |
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Effective date of registration: 20201214 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: 20201214 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 |