CN101071927A - Closed CO2 laser photocatalytic electrode and its preparing method - Google Patents
Closed CO2 laser photocatalytic electrode and its preparing method Download PDFInfo
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- CN101071927A CN101071927A CN 200710052406 CN200710052406A CN101071927A CN 101071927 A CN101071927 A CN 101071927A CN 200710052406 CN200710052406 CN 200710052406 CN 200710052406 A CN200710052406 A CN 200710052406A CN 101071927 A CN101071927 A CN 101071927A
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Abstract
This invention is a photocatalytic electrode and production methods used in the sealed-off CO2 lasers. This electrode from titanium or titanium alloy substrate oxidation methods and the use of direct access to the surface in the basement of a nano-titanium dioxide film, in such a structure makes conductive electrode at the same time has a good photocatalytic properties, catalytic oxidation can be sealed-off CO2 lasers CO2 decomposition of CO produced by maintaining sealed-off CO2 laser CO2 concentration level and inhibit the production of harmful gases, can not only play a catalytic role in the cathode and anode can also play a catalytic role, its most prominent feature is: a other electrodes do not have cathodic decomposition of organic dirt smoke generated CO2 gas capacity. Electrode production process such as: cutting, molding, washing, drying, such as oxidation process, in accordance with its needs of the surface oxide layer can be heated or direct oxidation methods such as anodic oxidation DC, titanium or titanium alloy substrate direct access to nanotechnology TiO2 films. Use of this invention can be slowed sealed-off CO2 laser with CO2 decomposition, and reduce the formation of cathode breathing dirt, raising CO2 laser performance at the same time, extend the CO2 laser life, and lower utility costs.
Description
Affiliated technical field:
The invention belongs to and be used in enclosed type CO
2A kind of electrode and manufacture method on the laser with photocatalysis.
Background technology:
The existing enclosed type CO that is used for
2The laser electrode material generally adopts ceramic materials such as metal such as gold, silver (yellow gold), tantalum, platinum, nickel or cobalt strontium lanthanum oxide to constitute, and is filled with a certain proportion of CO in laser tube
2, N
2, He, CO, H
2, working gas such as Xe, and imposing between electrode under the suitable high-pressure situations, working gas is exported CO owing to encouraging
2Laser.Employed electrode material of above-mentioned CO 2 laser tube and manufacture craft are known by people, owing to well-known reason, carbon dioxide very easily decomposes in the laser tube running, thereby the kind and the ratio of working gas in the change laser tube, add carbon dioxide decompose the oxygen that produced again than be easier to laser tube in metal electrode and working gas N
2React, further aggravated the change of working gas composition in the laser tube; Because the sputter thing that electrode produces in glow discharge also can absorb a large amount of working gass, the thing of sputter simultaneously, oxidation product also can pollute completely reflecting mirror and outgoing mirror on the other hand; Moreover discharge process also consumes CO
2Gas generates the negative electrode organic dirt smoke of a large amount of carbon containings, and this negative electrode organic dirt smoke is because of its irreversibility, makes CO in the discharge tube
2The a large amount of losses of gas have further worsened the operational environment of laser.Owing to the power output of above reason laser tube will constantly descend, and finally cause the termination in sealed CO 2 laser tube life-span.For prolonging the life-span of sealed CO 2 laser tube, people mainly adopt the material electrode with catalytic action at present, as gold, platinum, silver (silver alloy), cobalt strontium lanthanum oxide; Although adopt above way to obtain certain effect, yet have following problems simultaneously: 1. existing metallic catalyst has the noble metal that mostly is of better catalytic action, and cost is higher; 2. existing ceramic catalytic material needs high temperature sintering, and machining property is not good enough; 3. the existing most catalysis area of catalyst is little, and the gas transformation efficiency is low; 4. existing catalyst working temperature is higher, and catalytic effect is not obvious under the lower temperature, improves temperature and makes the discharge stability variation again easily; 5. the electrode that existing catalyst is made does not possess the ability of decomposing the negative electrode organic dirt smoke.Owing to fail to solve preferably effective unification of the economy of efficient catalytic and catalysis, make the user be difficult to obtain the enclosed type laser tube of super quality and competitive price, and then restricted enclosed type laser tube promoting the use of at industrial circle.
Summary of the invention:
The present invention is exactly in order to overcome the shortcoming of prior art, a kind of CO 2 laser electrode with photocatalysis to be provided, and improves laser performance and prolongs its life-span, and then reduce the use cost of laser.
Another object of the present invention is to provide a kind of manufacture method with CO 2 laser electrode of photocatalysis.
The objective of the invention is to be achieved through the following technical solutions:
The method of the titanium or the titanium alloy-based end and employing oxidation directly constitutes electrode of the present invention at the nano-titanium dioxide film that substrate surface obtains, and this kind structure makes electrode have good photocatalysis performance in conduction, is placed on enclosed type CO
2In the laser, at enclosed type CO
2In the laser under the formed ultraviolet irradiation of gas discharge, can catalytic oxidation enclosed type CO
2CO in the laser
2Decompose the CO that is produced, keep enclosed type CO
2CO in the laser
2The concentration level of gas suppresses the generation of pernicious gas, and not only negative electrode can be brought into play catalytic action, and anode also can bring into play catalytic action, and its most outstanding characteristics are to have the not available decomposition negative electrode of other electrode organic dirt smoke and generate CO
2The ability of gas.The manufacture craft flow process of this kind electrode is: steps such as blanking, moulding, cleaning, drying, oxidation, its surface oxide layer can adopt method for oxidation such as heating direct oxidation or dc anodizing directly to obtain nano-titanium dioxide film at titanium or at titanium alloy-based the end as required.
Described enclosed type CO
2The photochemical catalyst electrode of laser is characterized in that, the nano-titanium dioxide film that comprises the titanium or the titanium alloy-based end and adopt the method for oxidation directly to obtain at substrate surface.
The described enclosed type CO that is used for
2The photochemical catalyst electrode of laser, its feature also is: at the nano-titanium dioxide film that the substrate surface oxidation is obtained, its composition can be anatase titanium dioxide or rutile-type or anatase titanium dioxide+rutile type nano titanic oxide.
The described enclosed type CO that is used for
2The photochemical catalyst electrode of laser, its feature also is: at the nano-titanium dioxide film that the substrate surface oxidation is obtained, its thickness is at 50nm----1200nm.
The described enclosed type CO that is used for
2The manufacture method of the photochemical catalyst electrode of laser, it is characterized in that, the manufacture craft flow process comprises: steps such as blanking, moulding, cleaning, drying, oxidation, wherein oxidation step can adopt methods such as heating direct oxidation or dc anodizing, directly obtains needed nano-titanium dioxide film at substrate surface.
The described enclosed type CO that is used for
2The manufacture method of the photochemical catalyst electrode of laser, its feature also is: directly obtain nano-titanium dioxide film at titanium or titanium alloy-based basal surface with method for oxidation.
The described enclosed type CO that is used for
2The manufacture method of the photochemical catalyst electrode of laser, its feature also is: at the nano-titanium dioxide film that the substrate surface oxidation is obtained, its thickness is at 50nm----1200nm.
The described enclosed type CO that is used for
2The manufacture method of the photochemical catalyst electrode of laser, its feature also is: described oxidation step, can adopt method for oxidation such as heating direct oxidation or dc anodizing directly to obtain nano-titanium dioxide film at substrate surface.
The described enclosed type CO that is used for
2The manufacture method of the photochemical catalyst electrode of laser, its feature also is: at the nano-titanium dioxide film that the substrate surface oxidation is obtained, its composition can be anatase titanium dioxide or rutile-type or anatase titanium dioxide+rutile type nano titanic oxide.
Among the present invention, the method for titanium or the titanium alloy-based end and employing oxidation is directly formed photochemical catalyst electrode of the present invention at the nano-titanium dioxide film that substrate surface obtains, this kind structure makes electrode have good photocatalysis performance in conduction.Nano-titanium dioxide film is proved and can promotes CO and O reaction to generate CO under ultraviolet irradiation effectively
2, well-known in the carbon dioxide laser region of discharge gas discharge can produce a large amount of ultraviolet rays, these ultraviolet rays with direct irradiation on the surface of electrode inner wall nano-titanium dioxide film.Work as CO
2After the molecular breakdown, formed CO molecule can be transported on the surface of nano-titanium dioxide film, and formed have energy and activity is very strong, and the life-span is a large amount of O atoms and the part of O of 30-40 millisecond magnitude
2 *, O
2 +, O
3Plasma just has an opportunity directly to drop on the surface of nano-titanium dioxide film, just is enough to overcome intermolecular activation energy under ultraviolet irradiation, makes the CO molecular oxygen change into CO
2Molecule.Nano-titanium dioxide film under the ultraviolet irradiation is fabulous photochemical catalyst, nano-titanium dioxide film is placed on the inwall of electrode, and CO molecule and all kinds of oxygen particle-catalytic combined efficiency are improved, and has recovered CO in the laser tube to a considerable extent
2The concentration of molecule; On the other hand, owing to reduced the concentration of O atom effectively, reduce catabolite O, the O that knows clearly harmful
3, NO and N
2The generation probability of O etc. has reduced the generation of the activated material that disappears, and the power output of laser tube is expected to obtain stable and corresponding raising; Special needs to be pointed out is because nano titanium oxide has and decompose organic dirt generation CO
2The ability of gas so perplex people's negative electrode crock problem for a long time, will be resolved along with the employing of this kind electrode.The nano-titanium dioxide film of electrode surface has solved CO reliably
2The regeneration problem, add that harmful substance generates the minimizing of quantity and effective inhibition of electrode inner surface titanium deoxid film target crock, thereby reduced use cost the useful life of having improved CO 2 laser tube greatly.
A kind of enclosed type CO involved in the present invention
2The laser optical catalysis electrode is compared with existing electrode and is had the following advantages: can be at normal temperatures by photocatalysis catalytic oxidation enclosed type CO in laser works
2CO in the laser
2The CO gas that decomposing gas produced is kept enclosed type CO
2CO in the laser
2The concentration level of gas suppresses the generation of pernicious gas, and not only negative electrode can be brought into play catalytic action, and anode also can bring into play catalytic action, and its most outstanding characteristics are to have the not available decomposition negative electrode of other electrode organic dirt smoke and generate CO
2The ability of gas.This electrode has good chemical stability, and sputtering raste is extremely low.Therefore adopt the laser of this kind electrode, can improve CO
2Every performance of laser is particularly to power output with good lifting is arranged useful life.
A kind of enclosed type CO involved in the present invention
2The manufacture method of laser optical catalysis electrode, owing to directly generate nano titanium oxide at substrate surface, make electrode manufacturing process simplify, catalytic performance improves, the nano titanium oxide adhesion-tight, and the electrode surface of making is smooth, compact conformation, enough mechanical strengths are arranged, and high conformity is fit to produce in batches.
Description of drawings:
The present invention is further described below in conjunction with drawings and Examples:
Fig. 1 is a structural representation of the present invention
Fig. 2 is the A-A profile of Fig. 1
1. titaniums (or titanium alloy) substrate, 2. contact conductors, 3. nano titanium oxides, 4. nano titanium oxides in Fig. 1
Embodiment:
In Fig. 1, the enclosed type CO that is used in of the present invention
2A kind of photochemical catalyst electrode in the laser, include titanium (or titanium alloy) substrate 1., contact conductor 2., nano titanium oxide 3., 4. several parts of nano titanium oxide form.The manufacture craft flow process of this kind electrode comprises: steps such as blanking, moulding, cleaning, drying, oxidation, at first as required to the blanking of 0.1mm Titanium (or titanium alloy) sheet, then Titanium (or titanium alloy) sheet of blanking gained is rolled into the tubular of certain size, be fixed through electric resistance welding again, and it is contact conductor is integrally welded with it, then clean, drying, adopt method for oxidation such as heating direct oxidation or dc anodizing more as required, directly obtain nano-titanium dioxide film at titanium alloy-based the end at titanium or.The electrode that this nano-titanium dioxide film that directly obtains at substrate surface with the method for titanium or the titanium alloy-based end and employing oxidation constitutes is exactly the photochemical catalyst electrode that can be directly used in carbon dioxide laser.
Set forth basic skills of the present invention below in conjunction with embodiment, not only be confined to following embodiment but the present invention makes the method for photochemical catalyst electrode:
At first as required to the blanking of 0.1mm Titanium (or titanium alloy) sheet, then Titanium (or titanium alloy) sheet of blanking gained is rolled into the tubular of certain size, be fixed through electric resistance welding again, and it is contact conductor is integrally welded with it, before reaction, need sample to be cleaned with cleanser, remove surface and oil contaminant, clean after soaking with HF again with distilled water flushing, with titanium substrate and ready silicon controlled rectifier (KDA, 50A, 250V) anode of DC power supply links to each other, and uses with the copper coin of titanium substrate same size and makes negative electrode, link to each other with power cathode, then titanium substrate and copper coin are placed 0.5mol/L H
2SO
4In the solution, the distance of two interpolars remains 4cm.By anodic oxidation at titanium substrate surface growth in situ TiO
2Film.Whole anode oxidation process is divided into two stages to carry out, and the phase I keeps constant current 0.4A, rises to set point 160V up to voltage, second stage, the holding anode oxidation voltage is that set point 160V is constant, finishes until anode oxidation process, and electric current is decayed gradually near till the 0A.The TiO of preparation
2Membrane electrode is clean with distilled water flushing, obtains required photochemical catalyst electrode after the drying.
Embodiment 2 heating direct oxidation methods prepare photochemical catalyst electrode
At first as required to the blanking of 0.1mm Titanium (or titanium alloy) sheet, then Titanium (or titanium alloy) sheet of blanking gained is rolled into the tubular of certain size, be fixed through electric resistance welding again, and it is contact conductor is integrally welded with it, then clean, the dried specimen surface, place 75% ethanol ultrasonic cleaning then, dry up.Place 500 ℃ to carry out direct heated oxide at porcelain furnace and handle 15min the titanium substrate, obtain required photochemical catalyst electrode after the cooling.
Claims (8)
1. one kind is used for enclosed type CO
2The photochemical catalyst electrode of laser is characterized in that:
Comprise the nano-titanium dioxide film that the titanium or the titanium alloy-based end and the method that adopts oxidation directly obtain at substrate surface.
2. the described a kind of enclosed type CO that is used for of claim 1
2The photochemical catalyst electrode of laser, its feature also is: at the nano-titanium dioxide film that the substrate surface oxidation is obtained, its composition can be anatase titanium dioxide or rutile-type or anatase titanium dioxide+rutile type nano titanic oxide.
3. the described a kind of enclosed type CO that is used for of claim 1
2The photochemical catalyst electrode of laser, its feature also is: at the nano-titanium dioxide film that the substrate surface oxidation is obtained, its thickness is at 50nm----1200nm.
4. one kind is used for enclosed type CO
2The manufacture method of the photochemical catalyst electrode of laser, it is characterized in that, the manufacture craft flow process comprises: steps such as blanking, moulding, cleaning, drying, oxidation, wherein oxidation step can adopt method for oxidation such as heating direct oxidation or dc anodizing, directly obtains needed nano-titanium dioxide film at substrate surface.
5. the described a kind of enclosed type CO that is used for of claim 4
2The manufacture method of the photochemical catalyst electrode of laser, its feature also is: the method with oxidation directly obtains nano-titanium dioxide film at titanium or titanium alloy-based basal surface.
6. the described a kind of enclosed type CO that is used for of claim 4
2The manufacture method of the photochemical catalyst electrode of laser, its feature also is: at the nano-titanium dioxide film that the substrate surface oxidation is obtained, its thickness is at 50nm----1200nm.
7. the described a kind of manufacture method that is used for the photochemical catalyst electrode of seal CO 2 laser of claim 4, its feature also is: described oxidation step, can adopt method for oxidation such as heating direct oxidation or dc anodizing, directly obtain nano-titanium dioxide film at substrate surface.
8. the described a kind of manufacture method that is used for the photochemical catalyst electrode of seal CO 2 laser of claim 4, its feature also is: at the nano-titanium dioxide film that the substrate surface oxidation is obtained, its composition can be anatase titanium dioxide or rutile-type or anatase titanium dioxide+rutile type nano titanic oxide.
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| CN 200710052406 CN101071927A (en) | 2007-06-02 | 2007-06-02 | Closed CO2 laser photocatalytic electrode and its preparing method |
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|---|---|---|---|
| CN 200710052406 CN101071927A (en) | 2007-06-02 | 2007-06-02 | Closed CO2 laser photocatalytic electrode and its preparing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11939228B1 (en) | 2023-05-01 | 2024-03-26 | King Faisal University | Method of making rutile/anatase TIO2 layer via CO2 laser |
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2007
- 2007-06-02 CN CN 200710052406 patent/CN101071927A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11939228B1 (en) | 2023-05-01 | 2024-03-26 | King Faisal University | Method of making rutile/anatase TIO2 layer via CO2 laser |
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Open date: 20071114 |