TW200536224A - Process for producting metal-containing carbon nanomaterials - Google Patents

Abstract

A process for producting metal-containing carbon nanomaterial includes: providing a number of pairs of carbon rob electrodes; providing a metal steam source positioned near the carbon rob electrodes; producing an arc discharge between the pairs of carbon rob electrodes; subjecting the metal steam source to produce a metal steam and introducing the metal steam to the arc discharge area to produce metal-containing carbon nanomaterials; collecting and separating the metal-containing carbon nanomaterials.

Description

200536224 V. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to a method for preparing nanomaterials, and more particularly to a method for preparing carbon-clad metal nanomaterials. [Previous technology] Stone anti-cladding metal nano powder is a new type of nano material. When the metal is a transition metal or a rare earth metal, the material has superior magnetic properties. Because metal nano particles are enclosed by carbon and isolated from each other, this structure form not only shows the nano size effect but also overcomes the defects of thermal and chemical instability of nano metal materials due to excessive surface energy. Nano materials have good electromagnetic properties, thermal stability and corrosion resistance. In addition, because the outer layer of the material contains OC bonds, it can strongly absorb infrared rays. Therefore, broken metal nanomaterials are used as electromagnetic wave absorbing materials.

_, Yao Yaguchi's preparation technology mainly includes 7 / team / eight A A, several 1 L

Discharge), chemical vapor deposition (Chemical Vapor Deposition), and laser vaporization (Laser Vaporization). The chemical vapor deposition method and the laser volatilization method are not suitable for large-scale industrial production due to the expensive experimental equipment and low productivity. -Arc discharge method is the main method for preparing carbon-coated metal nanomaterials. μ Guozhu = 5: 83,263 discloses a carbon-coated metal nano material Wu method. The steps of this method are as follows: 衣 1 有 万 棒 ， ^ 金 # 属 1 Qin Keshi / Tian rod electrode, which is wrapped inside the graphite rod. An oxide of a metal or its alloy ^ magnetic metal and its alloy or the magnetic metal and the arc discharge of the stone black technology ^ & electrode to form magnetic gold

Page 5 200536224 V. Description of the invention (2) The carbon nano-particles are provided by) c), other non-magnetic material substances; including magnetic metal two VA on the other non-magnetic material substances mentioned above are separated by using 逑 lei ^ Ding ... stuck particles. Metal rods are easy to consume, and the utilization rate of graphite rod electrodes used in the :::： is low. Therefore, the amount of carbon-coated metal is small ', and the method of the device rod electrode has a low Lei 7 rate. And because the metal rod is embedded in the graphite carbon material, etc., it is not in the reaction zone and growing during the electrosynthesis process, which results in a low synthesis yield. Carbon-coated metal nanofon f is used to improve the yield of synthesis and can be mass-produced. Read the day of the invention Carbon-coated nanometers are intended to provide a synthetic yield that can be produced in large quantities. For the purpose of preparing the material X β purpose, the present invention provides a carbon-clad metal nano material @ π 十 其 including ... k for the number of electrodes from the counter electrode; k for a gold M γ jin near the source of grape rod rolling, The metal vapor source is provided on the carbon rod electrode so that a plurality of pairs of anti-yak electrodes are arc-discharged; the electric region causes the metal to vaporize, and the shield too LA p., /, &Quot; The vapor and the metal vapor enter the arc discharge ::: to separate the production of • to obtain a carbon-clad metal nanomaterial. In comparison, the present invention adopts a method of contacting metal vapor with an arc discharge electrode knife, which has the following advantages: its _, plural pairs of carbon rods

200536224 V. Description of the invention (3) Simultaneous arc discharge process of the electrode Increase the contact gold and increase the yield. Production advantages. [Embodiment] The following is a description. Please refer to the following steps: Step 1. Each pair of positive electrode and negative carbon rod. Negative carbon rod electrode. Positive carbon rod electrode. Carbon rod electrode and general vacuum electric electrode. Of course, the vacuum arc is set. Step 附近 2, near the electrode. The source, the metal industry, can produce a large amount of * '. Second, the use of the negative electrode in the arc discharge area, especially lice ... The preparation method of the invention is productive ^ Shin metal, /, high, can be produced in large numbers] With reference to the drawings and specific embodiments, the present invention is made into the first step ~ detailed steps, the preparation of the carbon-clad metal nanomaterial of the present invention The method provides plural pairs of broken rod electrodes. The plurality of electrodes are vertically arranged on the mine, and the counter-electrode includes ~ arc arc discharge settings. The electrodes are symmetrically arranged with a proper distance from each other. The electrodes are vertically arranged on the inside of the vacuum arc discharge device. The plural numbers are arranged vertically below the interior of the vacuum arc discharge device, and the diameters of the plural carbon electrode electrodes are equal and aligned with each other. 0 This negative shaped broken rod. The vacuum electric discharge device used in the present invention is different from the two optional arc discharge devices in that the vertical setting of the backup device is too old and the material is too old. There are different settings according to the discharge equipment, and it is not limited to provide a source of radon metal. The metal vapor source is provided on the carbon rod. It can be installed at the bottom of the vacuum arc discharge device. , The metal block

200536224 V. Description of the invention (4) Select metals such as copper, iron, nickel or cobalt. The center of the bottom of the lean electric equipment is close to the positive electrode with a plurality of positive ^ 10 and placed on the side of the metal block, but the electrode is close to but not in contact with the earth. Also, can other metals be used for steaming? 2. The horse's shooting direction is aligned with the metal Step 3, so as to generate a plurality of pairs of carbon rod electrodes I, such as a high-frequency heating source. Electric equipment, for arc discharge equipment: direct electrical discharge. Start the arc, such as inert gas; turn on the power to re-introduce protective gas. Step 4 is formed between the shooting rod electrodes, so that the metal vapor source generates a golden arc discharge area. The above electrons can be used to make the metal vapor enter the metal vapor, and the metal vapor enters upwards] counting the metal block to generate gold < ao electric region, for the synthesis reaction. In addition, if an arc evaporation device is required to make positive and negative carbon rod electrodes, an ion-assisted plating can be added, and products with more uniform wounds can fall within the range of the ion-assisted plating device. t will be the same, and it can produce the metal vapor 萼 products that high Jindan 碜 碜 rods receive. 3 nano carbon balls or nano carbon tubes Step 5. Collect and separate the product to obtain a stele. When the synthesis reaction time is turned off, turn off the direct-thunder metallic metal material. The product is collected and the separated metal-clad electrical equipment and the electronic grabbing are collected by an electromagnetic separation method. Not rice. The method of isolating the product can be used to further explain the present invention. ^ 0 a / tn A semi-prepared material for ▲ X Q ~ ~ and read the second picture 'Taking the preparation of i-clad copper nano material 枓 as an example Step 1 of this embodiment of the present invention, each step of the month. .. φ ^ Q n, A u The arc discharge device 30 is installed, and a plurality of negative electrode graphite rods are arranged vertically above the internal sudden discharge.

Page 8 200536224 V. Description of the invention (5) 3 1 2, 3 1 3, 3 1 4, 3 1 5; Corresponds to the upper part of the vacuum arc discharge device 30, and a plurality of positive electrode graphite rods 3 2 2 are arranged below, 32 3, 3 2 4, 3 2 5 The diameters of the graphite rods of the positive electrode and the negative electrode are equal and aligned with each other. In step 2 of this embodiment, a vapor deposition device provided at the bottom of the vacuum arc discharge device 30 is provided. The vapor deposition device includes a copper block 34 and an electronic grab 36. The copper block 34 is set in the center of the bottom of the vacuum arc discharge device 30, and is close to but not in contact with the positive electrode graphite rod 3 2 2, 3 2 3, 3 2 4, 3 2 5; the electronic grab 36 is set in the Copper block 3 4 —Side, the direction of electron emission is aligned with copper block 3 4. Step 3 of this embodiment, start the arc discharge device 3 〇; evacuate to 1 x 10 2torr; introduce helium or other inert gas to 100 ～ 2〇〇Torr; turn on the power supply (voltage 20 ~ 50V, current 60 ～ 120A) to form a stable arc between the plurality of positive and negative electrode graphite rods. & The vapor, between) This arc discharges the carbon and disperses in the dissolving peristaltic pump attached to the glass, but does not subcontract it. Copper is used in the method. Step 4 'Electronic grab 3 6 bombard the copper block 3 4 to produce s Into the arc discharge area (that is, a plurality of pairs of graphite rods. Implement step 5 of the method, after appropriate synthesis reaction time, turn off the vacuum: and electronically grab 36.11 under-collected products and use electromagnetic separation method to separate

It includes the following steps: the particles of the product are transported to the ultrasonic wave for 2 to 3 minutes. When the tube is suspended, because of the magnetic tube of the magnetic two magnets, when the suspension flows slowly, the magnetic substance will follow the K! Magnetic carbon-coated copper metal. It is absorbed into the solvent by the magnet, t ΐ: out of the glass tube, collect the magnetic fine powder, and then the material. Set the above separation step once to get pure carbon

200536224 I. Description of the invention (6) The carbon nanotubes that can be reasonably operated during the present invention can be used at the opportunity of arc discharge, so that in summary of the patent applications filed, those who are unable to skill should be included in the solution. The preparation of rice has a large number of raw materials, especially nano materials, please. However, with this limitation, the application under this application has the advantages of using 唉 ball and other methods to make the negative charge formation clear and clear. There are the following applications for metal poles that have met the application spirit of those who have met them. The method can prepare a large amount of metal. Advantages: Multiple pairs of carbon rod electrodes and steam can increase the contact metal and the embedded metal in the growth area of the arc discharge process, and increase the yield. The essentials of the invention patent are, in accordance with the law, only the scope of the patent for the preferred implementation of the invention. For all equivalent modifications or changes familiar with this case,

Page 10 200536224 Brief description of the diagram The first diagram is a schematic diagram of the steps for preparing a carbon-clad metal nanomaterial according to the present invention. The second figure is a schematic diagram of an apparatus for preparing a carbon-clad metal nanomaterial according to the present invention. [Description of main component symbols] Vacuum arc discharge equipment Electronic grab Negative electrode graphite rod Positive electrode graphite rod 30 Copper block 34 36 312, 313, 314, 315 3 2 2, 32 3, 3 24, 32 5 i

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Claims (1)

200536224 VI. Scope of patent application 1. A method for preparing carbon-coated metal nanomaterials, comprising: providing a plurality of pairs of carbon rod electrodes; providing a metal vapor source, the metal vapor source is provided near the carbon rod electrodes; An arc discharge occurs on the carbon rod electrode; the metal vapor source generates metal vapor and causes the metal vapor to enter the arc discharge area, and collects and separates products to obtain a carbon-clad metal nanomaterial. 2. The method for preparing a carbon-coated metal nanomaterial as described in item 1 of the scope of the patent application, wherein the plurality of pairs of carbon rods are arranged vertically in a vacuum arc discharge device. 3. The method for preparing a carbon-coated metal nanomaterial according to item 1 of the scope of the patent application, wherein the plurality of pairs of carbon rods include a negative carbon rod electrode and a positive carbon rod electrode. 4. The method for preparing carbon-coated metal nanomaterials as described in item 3 of the scope of patent application, wherein the diameters of the positive and negative carbon rod electrodes are equal and aligned with each other. 5. As described in item 1 of the scope of patent application A method for preparing a carbon-coated metal nanomaterial, wherein the carbon rod is a graphite rod or an amorphous carbon rod. 6. The method for preparing a carbon-coated metal nanomaterial according to item 1 of the scope of patent application, wherein the metal vapor source includes a metal block and an electron grab. 7. The method for preparing a carbon-clad metal nanomaterial according to item 6 of the patent application scope, wherein the metal vapor source further includes an ion plating aid. Page 12 200536224 6. Scope of patent application 8. The method for preparing the carbon-clad metal nanomaterial described in item 1 of the patent application scope, wherein the metal vapor source includes a high-frequency heating source. 9. The method for preparing a carbon-coated metal nanomaterial according to item 6 of the scope of the patent application, wherein the metal block is copper, iron, nickel, or copper. 10. The method for preparing a carbon-coated metal nanomaterial as described in item 1 of the scope of the patent application, wherein the method further comprises the following steps before causing arc discharge to a plurality of carbon rod electrodes: a) vacuuming, b) introducing Protective gas. 1 1. The method for preparing carbon-coated metal nanomaterials according to item 1 of the scope of patent application, wherein the separation method is an electromagnetic separation method. 1 2. The method for preparing a carbon-coated metal nanomaterial according to item 1 of the scope of the patent application, wherein the carbon-coated metal nanomaterial includes a nano-carbon tube-coated metal nanomaterial. 1 3. The method for preparing a carbon-coated metal nanomaterial according to item 1 of the scope of the patent application, wherein the carbon-coated metal nanomaterial includes a nano-carbon-coated metal nanomaterial. Page 13