CN103480364A - Photocatalyst La responsive to visible light7Nb3W4O30And method for preparing the same - Google Patents
Photocatalyst La responsive to visible light7Nb3W4O30And method for preparing the same Download PDFInfo
- Publication number
- CN103480364A CN103480364A CN201310478136.9A CN201310478136A CN103480364A CN 103480364 A CN103480364 A CN 103480364A CN 201310478136 A CN201310478136 A CN 201310478136A CN 103480364 A CN103480364 A CN 103480364A
- Authority
- CN
- China
- Prior art keywords
- visible light
- ball
- photocatalyst
- photochemical catalyst
- raw material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011941 photocatalyst Substances 0.000 title abstract description 9
- 238000000034 method Methods 0.000 title abstract 2
- 239000000126 substance Substances 0.000 claims abstract description 12
- 238000002360 preparation method Methods 0.000 claims abstract description 9
- 239000003054 catalyst Substances 0.000 claims description 22
- 239000000843 powder Substances 0.000 claims description 13
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 7
- 230000003292 diminished effect Effects 0.000 claims description 6
- 238000010298 pulverizing process Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 238000000498 ball milling Methods 0.000 claims description 5
- 239000013064 chemical raw material Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 230000003197 catalytic effect Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 230000001699 photocatalysis Effects 0.000 description 8
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical group O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 7
- 238000007146 photocatalysis Methods 0.000 description 5
- STZCRXQWRGQSJD-GEEYTBSJSA-M methyl orange Chemical compound [Na+].C1=CC(N(C)C)=CC=C1\N=N\C1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-GEEYTBSJSA-M 0.000 description 4
- 229940012189 methyl orange Drugs 0.000 description 4
- 239000010955 niobium Substances 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 3
- 239000004408 titanium dioxide Substances 0.000 description 3
- 239000003905 agrochemical Substances 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 239000003205 fragrance Substances 0.000 description 2
- 238000010532 solid phase synthesis reaction Methods 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- VEUKJXRCHYAIAW-UHFFFAOYSA-N [Nb].[K] Chemical compound [Nb].[K] VEUKJXRCHYAIAW-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 150000001621 bismuth Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000005297 pyrex Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
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- Catalysts (AREA)
Abstract
The invention discloses a visible light responding photocatalyst La7Nb3W4O30And a method for preparing the same. The chemical composition formula of the photocatalyst is La7Nb3W4O30. The invention also discloses a preparation method of the material. The preparation method is simple and low in cost, and the prepared photocatalyst has excellent catalytic performance, has the effect of decomposing harmful chemical substances under the irradiation of visible light, is good in stability and has good application prospect.
Description
Technical field
The present invention relates to a kind of visible light-responded photochemical catalyst La
7nb
3w
4o
30and 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 the photochemical catalyst decomposition water and atmosphere in agricultural chemicals and the organic matter such as odorant, and application examples such as self-cleaning that scribble the surface of solids of photochemical catalyst.The principle of light-catalyzed reaction is that photochemical catalyst is after the photon absorbed higher than its band-gap energy, hole and electronics have been generated, these holes and electronics carry out respectively oxidation reaction and reduction reaction, reach the purpose of decomposing harmful chemical, organic-biological matter and sterilization.Photochemical catalyst has many kinds, and wherein most representative is titanium dioxide (TiO
2), utilized titanium dioxide in water and the agricultural chemicals in atmosphere and the organic matters such as odorant decomposed, yet 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 the local work of uviol lamp arranged, 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.Irradiation is near sunshine medium wavelength visible light intensity maximum 500nm on earth's surface, the energy of the visible region that wavelength is 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 under visible ray and there is good absorption.A series of niobiums (tantalum) hydrochlorate photochemical catalyst is widely studied owing to having higher photocatalytic activity.For example, niobate photocatalyst Pb
3nb
4o
13, BiNbO
4and Bi
2mNbO
7(M=Al, Ga, In, Y, rare earth element or 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 photocatalysis performance preferably.
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 the spectrum respective range is narrow, so research and develop the new visible light-responded high efficiency photocatalyst that has, be very necessary.We are to La recently
7nb
3w
4o
30, La
7ta
3w
4o
30and La
7sb
3w
4o
30carry out Photocatalytic Performance Study Deng tungstates, found that La
7nb
3w
4o
30there is excellent visible light-responded photocatalysis performance, but La
7ta
3w
4o
30and La
7sb
3w
4o
30but do not there is visible light-responded photocatalysis performance.
Summary of the invention
The purpose of this invention is to provide a kind of visible light-responded photochemical catalyst La that has
7nb
3w
4o
30and preparation method thereof.
The chemical constitution formula with visible light-responded photochemical catalyst the present invention relates to is: La
7nb
3w
4o
30.
Preparation method's concrete steps of above-mentioned visible light-responded photochemical catalyst are:
(1) by 99.9% analytically pure chemical raw material La
2o
3, Nb
2o
5and WO
3, press La
7nb
3w
4o
30the chemical formula weigh batching.
(2) raw material step (1) prepared mixes, and puts into ball grinder, adds zirconia ball and absolute ethyl alcohol, and ball milling 8 hours, be mixed and finely ground, and takes out and dries, and crosses 200 mesh sieves.
(3) powder step (2) mixed is 1300 ~ 1350 ℃ of pre-burnings, and is incubated 6 hours, naturally cools to room temperature, then by ball mill pulverizing means, particle diameter diminished, and lower than 2 μ m, obtains La
7nb
3w
4o
30powder.
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.
The specific embodiment
Below will be specifically described the present invention:
1, the composite oxides in order to obtain using in the present invention, at first used solid-phase synthesis to prepare powder, the various oxides as raw material or carbonate measured than being mixed according to the 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 prepared with solid-phase synthesis, its particle is 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 usingd methyl orange as the simulation organic pollution, and its concentration is 20mg/L; Tungstates photochemical catalyst La
7nb
3w
4o
30addition be 1g/L; Light source is used the xenon lamp of 300W, and the vessel that reactive tank is used pyrex to make, obtain by wave filter the light that wavelength is greater than 420nm long wavelength, then irradiates photochemical catalyst; Catalysis time is set as 120 minutes.
Embodiment 1:
(1) by 99.9% analytically pure chemical raw material La
2o
3, Nb
2o
5and WO
3, press La
7nb
3w
4o
30the chemical formula weigh batching.
(2) raw material step (1) prepared mixes, and puts into ball grinder, adds zirconia ball and absolute ethyl alcohol, and ball milling 8 hours, be mixed and finely ground, and takes out and dries, and crosses 200 mesh sieves.
(3) powder step (2) mixed is 1300 ℃ of pre-burnings, and is incubated 6 hours, naturally cools to room temperature, then by ball mill pulverizing means, particle diameter diminished, and lower than 2 μ m, obtains tungstates La
7nb
3w
4o
30powder.
Prepared photochemical catalyst, be greater than at wavelength under the radiation of visible light of 420nm, the methyl orange clearance reached to 98.2% in 120 minutes.
Embodiment 2:
(1) by 99.9% analytically pure chemical raw material La
2o
3, Nb
2o
5and WO
3, press La
7nb
3w
4o
30the chemical formula weigh batching.
(2) raw material step (1) prepared mixes, and puts into ball grinder, adds zirconia ball and absolute ethyl alcohol, and ball milling 8 hours, be mixed and finely ground, and takes out and dries, and crosses 200 mesh sieves.
(3) powder step (2) mixed is 1320 ℃ of pre-burnings, and is incubated 6 hours, naturally cools to room temperature, then by ball mill pulverizing means, particle diameter diminished, and lower than 2 μ m, obtains tungstates La
7nb
3w
4o
30powder.
Prepared photochemical catalyst, be greater than at wavelength under the radiation of visible light of 420nm, the methyl orange clearance reached to 99.2% in 120 minutes.
Embodiment 3:
(1) by 99.9% analytically pure chemical raw material La
2o
3, Nb
2o
5and WO
3, press La
7nb
3w
4o
30the chemical formula weigh batching.
(2) raw material step (1) prepared mixes, and puts into ball grinder, adds zirconia ball and absolute ethyl alcohol, and ball milling 8 hours, be mixed and finely ground, and takes out and dries, and crosses 200 mesh sieves.
(3) powder step (2) mixed is 1350 ℃ of pre-burnings, and is incubated 6 hours, naturally cools to room temperature, then by ball mill pulverizing means, particle diameter diminished, and lower than 2 μ m, obtains tungstates La
7nb
3w
4o
30powder.
Prepared photochemical catalyst, be greater than at wavelength under the radiation of visible light of 420nm, and 120min reaches 98.7% to the methyl orange clearance.
The present invention never is limited to above embodiment.The bound of each temperature, interval value can realize the present invention, at this, do not enumerate embodiment.
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 tungstates, as the application of visible light-responded photochemical catalyst, is characterized in that the chemical constitution formula of described tungstates is: La
7nb
3w
4o
30;
Preparation method's concrete steps of described tungstates are:
(1) by 99.9% analytically pure chemical raw material La
2o
3, Nb
2o
5and WO
3, press La
7nb
3w
4o
30the chemical formula weigh batching;
(2) raw material step (1) prepared mixes, and puts into ball grinder, adds zirconia ball and absolute ethyl alcohol, and ball milling 8 hours, be mixed and finely ground, and takes out and dries, and crosses 200 mesh sieves;
(3) powder step (2) mixed is 1300 ~ 1350 ℃ of pre-burnings, and is incubated 6 hours, naturally cools to room temperature, then by ball mill pulverizing means, particle diameter diminished, and lower than 2 μ m, obtains La
7nb
3w
4o
30powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310478136.9A CN103480364B (en) | 2013-10-14 | 2013-10-14 | Photocatalyst La responsive to visible light7Nb3W4O30And method for preparing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310478136.9A CN103480364B (en) | 2013-10-14 | 2013-10-14 | Photocatalyst La responsive to visible light7Nb3W4O30And method for preparing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103480364A true CN103480364A (en) | 2014-01-01 |
| CN103480364B CN103480364B (en) | 2015-04-15 |
Family
ID=49821150
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310478136.9A Active CN103480364B (en) | 2013-10-14 | 2013-10-14 | Photocatalyst La responsive to visible light7Nb3W4O30And method for preparing the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103480364B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104190404A (en) * | 2014-09-17 | 2014-12-10 | 桂林理工大学 | Visible-light-responded photocatalyst SmNbMo2O10 and preparation method thereof |
| CN104646019A (en) * | 2015-02-26 | 2015-05-27 | 桂林理工大学 | Photocatalyst LiCu3NbWO9 with visible light response and preparation method thereof |
| CN104645971A (en) * | 2015-02-04 | 2015-05-27 | 桂林理工大学 | Visible-light response photocatalyst SmNb3W2O15 and preparation method thereof |
| CN104645972A (en) * | 2015-02-05 | 2015-05-27 | 桂林理工大学 | Visible-light response photocatalyst La3Nb9WO30 and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101143316A (en) * | 2007-10-12 | 2008-03-19 | 桂林工学院 | Niobate photocatalyst and preparation method |
| CN101757910A (en) * | 2010-01-02 | 2010-06-30 | 桂林理工大学 | Visible light responding composite oxide photocatalyst Ba4Li2W2O11 and preparation method |
| JP2013154286A (en) * | 2012-01-30 | 2013-08-15 | Ohara Inc | Photocatalytic porous body |
-
2013
- 2013-10-14 CN CN201310478136.9A patent/CN103480364B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101143316A (en) * | 2007-10-12 | 2008-03-19 | 桂林工学院 | Niobate photocatalyst and preparation method |
| CN101757910A (en) * | 2010-01-02 | 2010-06-30 | 桂林理工大学 | Visible light responding composite oxide photocatalyst Ba4Li2W2O11 and preparation method |
| JP2013154286A (en) * | 2012-01-30 | 2013-08-15 | Ohara Inc | Photocatalytic porous body |
Non-Patent Citations (2)
| Title |
|---|
| F.GOUTENOIRE等: "Extension of the La7Mo7O30 structural type with La7Nb3W4O30 and La7Ta3W4O30 compounds", 《JOURNAL OF SOLID STATE CHEMISTRY》 * |
| 吴菊: "水热法合成钨酸盐材料的纳米结构", 《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104190404A (en) * | 2014-09-17 | 2014-12-10 | 桂林理工大学 | Visible-light-responded photocatalyst SmNbMo2O10 and preparation method thereof |
| CN104645971A (en) * | 2015-02-04 | 2015-05-27 | 桂林理工大学 | Visible-light response photocatalyst SmNb3W2O15 and preparation method thereof |
| CN104645972A (en) * | 2015-02-05 | 2015-05-27 | 桂林理工大学 | Visible-light response photocatalyst La3Nb9WO30 and preparation method thereof |
| CN104646019A (en) * | 2015-02-26 | 2015-05-27 | 桂林理工大学 | Photocatalyst LiCu3NbWO9 with visible light response and preparation method thereof |
| CN104646019B (en) * | 2015-02-26 | 2016-08-24 | 桂林理工大学 | Visible light-responded photocatalyst Li Cu3nbWO9and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103480364B (en) | 2015-04-15 |
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