CN104368371A - Photocatalyst Sr3LaSi3N7 with visible light response and preparation method thereof - Google Patents
Photocatalyst Sr3LaSi3N7 with visible light response and preparation method thereof Download PDFInfo
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- CN104368371A CN104368371A CN201410574083.5A CN201410574083A CN104368371A CN 104368371 A CN104368371 A CN 104368371A CN 201410574083 A CN201410574083 A CN 201410574083A CN 104368371 A CN104368371 A CN 104368371A
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Abstract
The invention discloses a photocatalyst Sr3LaSi3N7 with visible light response and a preparation method thereof. The chemical formula of the photocatalyst is Sr3LaSi3N7. The invention also discloses a preparation method of the material. The obtained photocatalyst has the advantages of wide spectral response range, high light conversion efficiency, good stability and the like, and irradiated by visible light, the photocatalyst has the function of decomposing harmful chemical substances and organic biomass and the function of sterilization.
Description
Technical field
The present invention relates to a kind of visible light-responded photochemical catalyst Sr
3laSi
3n
7and 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 Sr
3laSi
3n
7, Sr
3ndSi
3n
7, Sr
3smSi
3n
7, Sr
3euSi
3n
7compound carried out Photocatalytic Performance Study, found that Sr
3laSi
3n
7band gap be 2.85eV, there is excellent visible light-responded photocatalysis performance; And other sample is insulator, band gap width 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 photochemical catalyst Sr
3laSi
3n
7and preparation method thereof.
The chemical constitution formula with visible light-responded photochemical catalyst that the present invention relates to is: Sr
3laSi
3n
7.
Preparation method's concrete steps of above-mentioned visible light-responded photochemical catalyst are:
(1) be 99.9%(percentage by weight by purity) more than Sr
3n
2, LaN and Si
3n
4starting powder press Sr
3laSi
3n
7composition weigh batching.
(2) step (1) raw material wet ball-milling is mixed 12 hours, ball-milling medium is absolute ethyl alcohol, and after oven dry, calcination 8 hours in 1300 ~ 1400 DEG C of nitrogen atmospheres, naturally cools to room temperature, then being pulverized by ball mill makes average diameter of particles lower than 2 μm, namely obtains Sr
3laSi
3n
7powder.
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 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.
2, photocatalysis experiment of the present invention is using methyl orange as simulation organic pollution, and its concentration is 20mg/L; Photochemical catalyst Sr
3laSi
3n
7addition 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 120 minutes.
Embodiment 1:
(1) be 99.9%(percentage by weight by purity) more than Sr
3n
2, LaN and Si
3n
4starting powder press Sr
3laSi
3n
7composition weigh batching.
(2) step (1) raw material wet ball-milling is mixed 12 hours, ball-milling medium is absolute ethyl alcohol, and after oven dry, calcination 8 hours in 1300 DEG C of nitrogen atmospheres, naturally cools to room temperature, is then pulverized by ball mill and makes average diameter of particles lower than 2 μm, namely obtain Sr
3laSi
3n
7powder.
Prepared photochemical catalyst, under being greater than the radiation of visible light of 420nm, reaches 97.5% to methyl orange clearance in 120 minutes at wavelength.
Embodiment 2:
(1) be 99.9%(percentage by weight by purity) more than Sr
3n
2, LaN and Si
3n
4starting powder press Sr
3laSi
3n
7composition weigh batching.
(2) step (1) raw material wet ball-milling is mixed 12 hours, ball-milling medium is absolute ethyl alcohol, and after oven dry, calcination 8 hours in 1350 DEG C of nitrogen atmospheres, naturally cools to room temperature, is then pulverized by ball mill and makes average diameter of particles lower than 2 μm, namely obtain Sr
3laSi
3n
7powder.
Prepared photochemical catalyst, under being greater than the radiation of visible light of 420nm, reaches 98.1% to methyl orange clearance in 120 minutes at wavelength.
Embodiment 3:
1) be 99.9%(percentage by weight by purity) more than Sr
3n
2, LaN and Si
3n
4starting powder press Sr
3laSi
3n
7composition weigh batching.
(2) step (1) raw material wet ball-milling is mixed 12 hours, ball-milling medium is absolute ethyl alcohol, and after oven dry, calcination 8 hours in 1400 DEG C of nitrogen atmospheres, naturally cools to room temperature, is then pulverized by ball mill and makes average diameter of particles lower than 2 μm, namely obtain Sr
3laSi
3n
7powder.
Prepared photochemical catalyst, be greater than the radiation of visible light of 420nm at wavelength under, 120min 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 Sr
3laSi
3n
7;
Preparation method's concrete steps of described photochemical catalyst are:
(1) be 99.9%(percentage by weight by purity) more than Sr
3n
2, LaN and Si
3n
4starting powder press Sr
3laSi
3n
7composition weigh batching;
(2) step (1) raw material wet ball-milling is mixed 12 hours, ball-milling medium is absolute ethyl alcohol, and after oven dry, calcination 8 hours in 1300 ~ 1400 DEG C of nitrogen atmospheres, naturally cools to room temperature, then being pulverized by ball mill makes average diameter of particles lower than 2 μm, namely obtains Sr
3laSi
3n
7powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410574083.5A CN104368371B (en) | 2014-10-24 | 2014-10-24 | Visible light-responded photocatalyst Sr3laSi3n7and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410574083.5A CN104368371B (en) | 2014-10-24 | 2014-10-24 | Visible light-responded photocatalyst Sr3laSi3n7and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104368371A true CN104368371A (en) | 2015-02-25 |
| CN104368371B CN104368371B (en) | 2016-08-10 |
Family
ID=52547717
Family Applications (1)
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|---|---|---|---|
| CN201410574083.5A Active CN104368371B (en) | 2014-10-24 | 2014-10-24 | Visible light-responded photocatalyst Sr3laSi3n7and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106179370A (en) * | 2016-07-18 | 2016-12-07 | 桂林理工大学 | Visible light-responded photocatalyst Li FeGe3o8and preparation method thereof |
| CN106179310A (en) * | 2016-07-19 | 2016-12-07 | 桂林理工大学 | Visible light-responded photocatalyst Li2caSn2o6and preparation method thereof |
| CN108043446A (en) * | 2017-12-26 | 2018-05-18 | 浙江睿升环保科技有限公司 | A kind of wide spectrum responds g-C3N4/Ta3N5Composite photocatalyst material and its preparation method and application |
| CN110129051A (en) * | 2019-06-02 | 2019-08-16 | 陕西师范大学 | La4Ca3Si6N14Crystal and fluorescent powder and preparation method |
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| CN103623803A (en) * | 2012-08-30 | 2014-03-12 | 上海纳晶科技有限公司 | Visible light photocatalyst and preparation method therefor |
| CN103934013A (en) * | 2014-04-18 | 2014-07-23 | 江苏大学 | Composite photocatalyst and preparation method thereof |
| CN104001531A (en) * | 2014-05-03 | 2014-08-27 | 桂林理工大学 | Visible-light-responsive photocatalyst Li3V2PO9 and preparation method thereof |
| CN104001527A (en) * | 2014-05-03 | 2014-08-27 | 桂林理工大学 | Visible-light-responsive photocatalyst Li3Ti2PO8 and preparation method thereof |
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2014
- 2014-10-24 CN CN201410574083.5A patent/CN104368371B/en active Active
Patent Citations (5)
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|---|---|---|---|---|
| CN102489324A (en) * | 2011-11-18 | 2012-06-13 | 陕西科技大学 | F and N co-doped visible-light response bismuth vanadate photocatalyst and preparation method thereof |
| CN103623803A (en) * | 2012-08-30 | 2014-03-12 | 上海纳晶科技有限公司 | Visible light photocatalyst and preparation method therefor |
| CN103934013A (en) * | 2014-04-18 | 2014-07-23 | 江苏大学 | Composite photocatalyst and preparation method thereof |
| CN104001531A (en) * | 2014-05-03 | 2014-08-27 | 桂林理工大学 | Visible-light-responsive photocatalyst Li3V2PO9 and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106179370A (en) * | 2016-07-18 | 2016-12-07 | 桂林理工大学 | Visible light-responded photocatalyst Li FeGe3o8and preparation method thereof |
| CN106179310A (en) * | 2016-07-19 | 2016-12-07 | 桂林理工大学 | Visible light-responded photocatalyst Li2caSn2o6and preparation method thereof |
| CN108043446A (en) * | 2017-12-26 | 2018-05-18 | 浙江睿升环保科技有限公司 | A kind of wide spectrum responds g-C3N4/Ta3N5Composite photocatalyst material and its preparation method and application |
| CN110129051A (en) * | 2019-06-02 | 2019-08-16 | 陕西师范大学 | La4Ca3Si6N14Crystal and fluorescent powder and preparation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104368371B (en) | 2016-08-10 |
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Effective date of registration: 20201202 Address after: 257000 Wanda harbor city, No. 25-1, Gangcheng Road, Dongying Port Economic Development Zone, 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 510000 Patentee before: Guangzhou Boyi Intellectual Property Operation Co.,Ltd. Effective date of registration: 20201202 Address after: Room 502, building 1, No. 40, xiayuangang East Street, Tianhe District, Guangzhou City, Guangdong Province 510000 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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