TW200427505A - Unary or multiple metal colloid and method of producing , unary or multiple metal colloid - Google Patents

Abstract

The present invention provides a unary or multiple metal colloid comprising nanoparticles consisting of one or more metal species, and one or more protective agents for protecting the nanoparticles, characterized in that the protective agents are a lower molecular weight material having one or more static groups and molecular weight of 30-5000. As the static groups contained in the protective agents, any of carboxyl group, amino group, sulfo group, phosphoric acid group, silic acid group, or boric acid group is preferable.

Description

200427505

[Technical field to which the invention belongs] Any or multiple metal colloidal solution and the present invention relate to a method for manufacturing the same. [The ceramic isomorphism previously described is a kind of so-called Nido's original application in manufacturing, but the atomic coagulation is expected to be a multi-technology based on the atomic composition of the battery for the reason of the composition] It is called the tiny conventional rice particles of metal. The catalyst in the form of a particle, which is currently being researched, generally recognizes the role of the catalyst colloid. The general or split contact is colloid: as a polymer, the metal colloid system refers to the non-particles (nano-particles use the liquid system to indicate that they are not Nano-grade optical, electrical, and optical components under discussion ... For colloidal applications. Nanoparticles for automotive exhaust gas are expected to be used as catalysts that support nanoscale metallic metals. They will be dissolved in solvents in the future. A colloidal solution of 1 to 100 nm of metal as a solvent dispersed and suspended in a solvent. Here, the child is composed of 2 atoms, 3 atoms, or groups. Metal glue systems have been one of the most useful fields for the production of various materials in various fields of raw materials in recent years. Examples include catalysts used in fuel processing catalysts. This system is based on catalyst particles, and the catalysts capable of supporting particles on the carrier show different reaction behaviors from the previous catalysts. Therefore, the research to find out more excellent properties affected by nano particles in another colloid that is effective for the manufacture of catalysts, using a plurality of types = enough to easily produce multi-metal catalysts, special catalyst. For example, shoulders used in cars, etc.

200427505 V. Description of the invention (2) In terms of gas treatment catalysts, in recent years, it has been used to turn the grains and rhodium difluoride catalysts that have catalyst function. The use of germanium particles in the process of using the exhaust gas treatment catalyst can suppress the growth of the particles. In addition, it is possible to use a uranium / ruthenium binary catalyst / the catalyst for this battery because of the movement of the platinum particles, and it is recognized that it has hydrophilic ruthenium, and it will use the genus; —Plutonium oxide, which is adsorbed on platinum, is satinized, and the carbon monoxide in the fuel gas combined with ruthenium is toxic and removed to prevent radicals. However, for metal colloids, a jealousy: compound . The so-called protective agent refers to the chemical or physical combination of the metal's body two as the protective agent, the condensed arm adsorbed on the periphery of the nano particles, and the ‘a substance’ inhibits the nano particles, that is, From two :: The diameter is distributed in the adaptive range to stabilize it. In a normal state: === agent 1 = nano particles with a particle size that remain suspended increase the effective surface of the catalyst iv, s the particle diameter of the small catalyst particles, and make the colloid as soluble as possible; the stability of the body Examine it and confirm that when i is used to produce exhaust gas purification catalyst, it can be confirmed that the exhaust gas is quite stable (i Zhaozhong particle growth does not occur). , Xun] 2000 279818 and JP 2000-1279824 虽 Although the previous colloid had good adsorption on the powder carrier, Ren has apparently no Page 8 2169-6175-PF (N2); Tcshiau.ptd 200427505 V. Description of the invention (3) The problem of difficult adsorption. In the case of using adsorption medium, not only the active dicolloid solution is produced to reduce the contact efficiency. The present invention is developed under the above background. A colloid containing a protective agent is not intended to provide a colloid with good properties. Different types of warfare and adsorption [Summary of the invention] The inventors of the present invention, in the previous gel, different reasons for different adsorptivity; because the type of carrier is based on the pore size of the carrier, and contains # = ;; , Then the following conclusions are reached: The relationship between small. ㈣ ， 于 ： ί: The body is surrounded by a large protective agent suspended (the combination of particles protected by the protective agent is called colloidal particles; the pore system of rice = = is larger than the size of the protective agent The fineness of the pore size: body type: = the type of carrier ... the fine shape of the powder carrier. In the powder carrier, the colloidal particles of the colloidal particles cannot penetrate into the pores and cause poor adsorption. The present inventors believe that as a colloidal colloid, it is necessary to obtain a colloid formed by absorbing particles even if it is lost ^ _-here .: pore size ⑽ can be said to be a polymer material such as pvp Λ The protective agent used in this and the body is LU. The main category is Knife, and the size of the colloidal particles is also large. Therefore, in order to control the size of colloidal particles, the inventors will protect the page 9 2169-6175- PF (N2); Tcshiau.ptd 200427505 V. Description of the invention (4) The molecular weight of the protective agent is controlled within an appropriate range, whereby colloids formed by colloidal particles that can even penetrate into minute pores can be obtained. That is, the present The invention is a one-element or multi-element gold Colloid, nano particles formed of one or two or more metal species, and one or two or more kinds of protective agents for protecting the aforementioned nano particles, and for the unitary system or multiple elements formed by the nano particles and the protective agent Is a metal colloid, characterized in that the aforementioned protective agent is a low molecular weight material having one or more electrostatic groups and a molecular weight of 30 to 500. The present invention is to reduce the colloid by using the protective agent as a low molecular material. grain

The size of the ion allows penetration into the minute pores and can be adsorbed on the carrier having the pores. Here, in order to make the colloidal 'protective agent having the characteristics which are the object of the present invention, the molecular weight needs to be in the range of 30 to 500. If it is 5,000 or more, the size of the entire colloidal particles is large, and it is difficult to penetrate into the minute pores. Therefore, the above electrostatic particles or cations are required to prevent nano-particles from being protected by the protective force, and can be used as the phosphate group and the stone repulsive force. The protective agent for the colloid of the present invention must have at least one sex group. The electrostatic group has a functional group which acts as an anion in a solvent. As described above, the protective agent has the purpose of agglomeration and coarsening between particles, but in the case of the electric group of the present invention, it is to achieve this purpose more effectively. That is, the agent has an electrostatic group, which repels the protective agent and suppresses the aggregation of nano particles. The electrostatic group of the protective agent is preferably any one of a carboxyl group, an amino group, an amiami, an acid group, and a boric acid group. And "from the point of view, the number of electrostatic groups contained in the protecting agent is also large.

200427505 V. Description of the invention (5) is better, and those with more than two electrostatic bases are better. Specific examples of suitable protective agents in the present invention having the above-mentioned conditions of low molecular weight and the presence of an electrostatic group include citric acid, phosphoric acid, tartaric acid, succinic acid, polyphosphoric acid, heteropolyacid, and silicic acid. , Boric acid, N- (2-ethylamino) -acrylidene diacetic acid, ethanedioic acid, gas-based acid, N-acetamidine glycine, N-acetamyl-L-lysine, adipic acid Acid, oxalic acid, maleic acid, ethylenediaminetetraacetic acid, 2-amino-2-fluorenylbutanedioic acid, 2-amino-4-methylglutaric acid, 8-amino-1-naphthol -3,6-disulfonic acid, aminosuccinic acid, azelaic acid, benzene-1,2,3-tricarboxylic acid, butylmalonic acid, pantothenic acid, camphoric acid, N-benzyl ester-L- Aminosuccinic acid, S-weisyl-L-cysteine, citrate, citrate, 1,1-cyclohexanediacetic acid, 1,2-cyclohexanediamine-N, N, N ' , N'-tetraacetic acid, 1,2-cyclohexanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, diethylenetriaminepentaacetic acid, phenyltartaric acid, 2, 2-dimethylglutaric acid, 2, 4-dimethylglutaric acid, 3, 3-dimethylglutaric acid, phthalic acid, terephthalic acid, glutaric acid Acid, 2,2-dimethylsuccinic acid, 2,3-difluorenylsuccinic acid, 2,2'-dithiodiacetic acid, 5,5'-dithiobis (2-nitrophenylarsinic acid) ), Benzoic acid, 2,2'-dithiosalicylic acid, salicylic acid, ethylenedioxanebis (ethylamine) -N, N, N ', N'-tetraacetic acid, glutamic acid, hexafluoro Glutaric acid, η- (2-hydroxyethyl) -ethylenediamine triacetic acid, 5-hydroxyisophthalic acid, isophthalic acid, maleic acid, malic acid, malonic acid, fluorenylsuccinic acid , N-methyliminodiacetic acid, mucinic acid, 3-nitrophthalic acid, oxalic acid, 2, 2'-hydroxydiacetic acid, pimelic acid, 2-oxoglutaric acid, triacetamide , 5-salicyl salicylic acid, tauric acid, or metal or salt salts of these acids, or 1,1'-bi-2-nanoic acid, 4,4-biphenyl dicarboxylic acid

2169-6175-PF (N2); Tcshiau.ptd Page 11 200427505 V. Description of the invention (6) Alcohol N, "~ bis (2-aminoethyl) -1,3 group) methylamine, sebacate Esters), 2, 2-bisdiurea, 1, butanediolamine, N, N-, and the metal ion in the clear metal glue has a reduction process as a protective agent. Examples of the present invention include salt, EDTA, and the like. The present invention relates to gold, ruthenium, and germanium, and the metals barium, osmium, osmium silver, solium, and osmium are made of the above metals. It is related to the fact that water and organic agents can be mixed as a single protective agent, although in the case of ion reduction, the sodium, sodium citrate, di-nano salt, nano-metals, iridium, titanium, and titanium can also be used in the invention. The related one is made of dendrite, which can be made into colloidal iron and iron which are hydrogen particles, and the following vanadium and niobium are formed by the following ethoxyethyl esters of the present invention: (2), 2 ,, 2, butane Diol and 1,4- may have multiple primary effects. The metal salt is dissolved in the nano particles to add the non-nano particles in the solvent, and the appropriate sodium sulfide, N-methyl, sebac, and azabutanediol are as described below in the solvent for production and use. It can act as pyrrolidine bis (3 ~ amino propionate bis (2 ~ ethylene triethanol, hydrazone. Metal colloid protective agent.) In the present invention, it is necessary to protect the solvent and protect it | J The original agent is added to simplify the colloidal protective agent Although metal ketones and oxalic acids are not particularly limited in use, they can be made of metal, metal, colloid, nickel, copper, indium, etc. A variety of rice grains can also be used in multiple species, but if considered, palladium, silver, and more are preferred. In addition to the solvent of the invention that condenses only metal species, the colloidal production method is used, A mixed solvent formed of precious gold, and the reducing agent is added to this solution, which is also a salt and water or a solvent and protection of the precious metal 200427505 V. Description of the invention (7) The method of reducing salt to form colloidal particles, using the electrode Insert + + T + For the method of precious metal salts in this solution, although the method of electrochemical reduction is performed by adding Shihara of Haruka Harahara J. and the method of I π + fixed = d, It can be used for the solution of the power source, electrode, and solution of the solution. The structure of the device used to reduce the liquid is equivalent; the manufacturing device: It is used to determine the current of the colloid and the voltage conditions.丄 1: 5 with a reducing effect for proper reduction;: = Lidang = Further, the metal salt of the protective agent and the protective agent, bei |] can produce a colloidal solvent to mix the reducing agent added here The side hydride and triammonium borane are more preferred. The reason why monomethyl boron is ideal due to its reducing power and the ability to act as an energetic agent in a short period of time is that, as a protective agent, it has an upper agent. At the time, you must keep the secret 丨 丨 you, Jindian ten, + I you, the role of protection W can only be used as the original agent, you can only use the agent, you can also add reducing agents and protective agents two于 ... 二 ', Nong's tincture is used as a protective agent for the reduced nano particles Solvents that perform work 5 and 'can also be used with solvents that have a reducing effect. In this case, n, n, -dimethylamidamine, ethyl',, methanol, propanol, tetrahydrofuran.- Therefore, 愔 = 丄 for those who have a reducing effect for protective agents and solvents, even if the amount of reducing agent added is small (under X in § relative to metal salts), the metal ions are still reduced. Regarding the method of the present invention, also

The amount of the original agent added is preferably in the range. 1/500 equivalent to 10 times the equivalent of the metal salt is formulated, >, 拄 ap 'For the metal salt used as the raw material, as the metal 制造 r & 石 石 肖 美 — ^ Applicable: Hexachlorofacial acid, dinitrodiammine, dihydrazine, heptadiate, cis-diammine dihydrate, platinum nitrate, trans-diammine =, self-acidate , Tetra nitrite platinum acid, tetra acid, cis ~ one-octane — oxygen B® Shawki monohydrate platinum, tetraammine platinum hydroxide, hexaammine platinum hydrogenation, hydration of four gases, hydration of six Ammonia conversion, hexadecyl acid conversion, oxygen, subchloride, platinum chloride, and tetrachloroplatinic acid. As metal salts used in the manufacture of colloids, palladium chloride, tetrachloropalladium acid, palladium nitrate, dichlorodiamine palladium, tetraamminepalladium nitrate di & tetraamminepalladium chloride, Ammonium palladium hydroxide, trans-diammonium diammine palladium f |, dinitrodiammine palladium, bis (ethylene diamine) palladium nitrate, and water (Yellow Gas) combined nitrate. As a metal salt in the production of gold colloids, it can be applied: gas gold acid, cyanide to (111) potassium, gold potassium cyanide, tetraammonium alloy nitrate, tetranitrate alloy salt, dihydrate (1, 1 〇 —Phenanthroline) alloy nitrate.

As a metal salt for producing a silver colloid, silver chlorate, silver nitrate, silver acetate, and silver lactate can be applied. As metal salts used in the manufacture of ruthenium colloids, it can be applied: gaseous ruthenium, ruthenium nitrate, ruthenium tetranitrosium dihydrate, ruthenium acetate, hexaammine ruthenium nitrate, ruthenium pentaammonium nitrate, nitrite pentaammine ruthenium Nitrate, hydroxynitrosotetraammonium nail nitrate. As a metal salt in the manufacture of colloids, it can be applied: vaporized rhodium, nitric acid

2169-6175-PF (N2); Tcshiau.Ptd

200427505 V. Description of the invention (9) Rhodium, rhodium acetate, pentammine hydrated germanium nitrate, pentammine nitrorhodium, trihydrate rhodium nitrate, hexaammonium hydrated germanium nitrate. As the metal salt used in the manufacture of iridium colloids, hexachloroiridium acid, iridium trichloride, hexanitroiridium acid, tris (oxalate) iridium acid, pentaammonium hydrated iridium oxalite salt, Pentammine iridium nitrite, hexaammine iridium nitrate. As a metal salt in the production of iron colloids, oxidation starvation can be applied. As a metal salt for the production of iron colloids, ferric chloride, nitrate > acid can be applied

Iron, iron fumarate, iron gluconate, iron oxalate, iron sulfate, iron. As metal salts in the manufacture of cobalt colloids, it can be applied: cobalt chloride, fumaric acid, rat emulsified inscription, jing acid, sulfuric acid, and several bases. As the metal salt used in the production of nickel colloids, nickel acetate, nickel-acetoneacetone · dihydrate, evolved nickel, nickel chloride, nickel hydroxide, nickel nitrate, and nickel sulfate can be used. As metal salts used in the manufacture of indium colloids, indium chloride, indium hydroxide, indium nitrate, indium acid filler, and thallium sulfate can be used. In addition, for the manufacture of colloids of indium, tungsten, barium, hafnium, zirconium, titanium, vanadium, niobium, groups, baht, zinc, germanium, tin, antimony, bismuth, boron, and the metal chlorides, nitrates Sulphate can be used as metal salt.

According to the method of the present invention, two types of colloidal colloids and = elementary colloids can be produced. In the case of producing a multi-component colloid, as a metal salt dissolved in a solvent, a plurality of salts of the intended metal are dissolved, and by reducing the plurality of metal ions in the solution simultaneously or sequentially, it is possible to produce A colloid of nano particles formed by a metal species. In the case of producing a plurality of metal colloids, a plurality of metal colloids may be separately produced, and these metal colloids may be mixed. also

200427505 V. Description of the invention (10) That is, 'the plurality of metal colloids containing nano particles formed by different metal species are produced by the above method, and the metal species can be added by mixing the plurality of metal colloids produced. Composite. In addition, the term "compositing" herein refers to a structure in which a plurality of metal species are randomly mixed, and includes a state in which a plurality of metal species are regularly arranged and mixed, or one metal is the center of the other metal coating. This metal forms an end band shape of a multilayer structure. [Embodiments] Suitable examples of the present invention and comparative examples will be described below. First Example: 2 mL of 1.66 X 1 0_2M silver chlorate solution and 3.4 X 10_2M sodium citrate solution (K2mL as a protective agent were added to water, and then stirred, and then added 1.65 X 1 〇_2M sodium borohydride 〇5mL was used as a reducing agent to obtain 50mL silver colloidal solution. Second Example: 3.88 X 1 0_2M rhodium chloride solution 0.887mL, and 2 mL of 3.4 X 1 0_2M sodium citrate solution was used as a protecting agent and stirred, and then 1.65 X 10_2M sodium borohydride 1 mL was added as a reducing agent to obtain 50 mL of a rhodium colloid solution. Comparative Example 1 :

Take PVP 0.1 476g, R = 40, add 3mL of water under nitrogen flow, and mix for 10 minutes. After the instillation, '1.66 X 10-2 M silver perchlorate solution 2 mL ·' was added and stirred for 30 minutes. Then add 45mL of ethanol as a reduction

2169-6175-PF (N2); Tcshiau.ptd 200427505 V. Description of the invention (ll) The solution was refluxed at 90 ~ 95 ° C for 2 hours, and water: ethanol was mixed to make 1 · _ to obtain a silver colloid solution. Comparative Example 2: PVP 0.17g was grabbed, r = 40, and water, & 1, 3 mL was added under nitrogen flow for 10 minutes. After stirring, 3,80 x π rhodium chloride was added: 87 mL, and the mixture was stirred for 30 minutes. Then, 45 mL of ethanol was added as a reducing agent, and water: ethanol was formulated into i: 9. This solution was refluxed at 90-95 for 2 hours to obtain a germanium colloid solution. For the silver colloids produced in the first example and comparative example 1, the adsorption rate on the carrier and the enamel layer on the honeycomb f) was measured ... and the additional test system, each colloid was diluted by adding water to a silver concentration of 5 ppm, A 150 mL of aqueous solution was used to immerse a metal honeycomb support (alumina amount: 2.85 g) coated with an alumina layer in this aqueous solution. Then, while stirring the solution, the solution was sampled at regular intervals and the silver concentration was measured by lcp (inductively coupled plasma emission spectroscopy). Figure 1 shows the change in the silver concentration of each solution when the carrier was impregnated. From this graph, it can be confirmed that the decrease rate of the silver concentration (that is, the silver adsorption rate) when the silver colloid of the i-th example is adsorbed is more than that of the comparative examples.

It is high and the adsorption is completed in about 4 hours, which is shorter than that in the comparative example. 7 in

2169-6175-PF (N2); Tcshiau.ptd Page 17 200427505 Brief Description of Drawings Figure 1 is a graph showing changes in the silver concentration when the carrier is impregnated with the metal colloids of the first and comparative examples 1. iiiii 2169-6175-PF (N2); Tcshiau.ptd page 18

Claims (1)

200427505 VI. Scope of Patent Application " ~-I Two types of mono- or polymetallic colloids, which are nano particles formed by one or two or more genus species, and the place to protect the aforementioned nano particles 3 ίί With ί :, 蠖 剂 '❿ For this nano particle and protective agent element metal colloid, the * sign is that the aforementioned agricultural training department has a low molecular weight material with more than one electrostatic group and a molecular weight of 30 to 5000. . 2. The mono- or multi-metallic knee as described in item 1 of the scope of the patent application, wherein the electrostatic group contained in the protective agent is the group of weicyl, amino, xanthophyll, phosphate, silicic acid, and boric acid. Any of them. 3. As described in item 1 or 2 of the scope of the application for patent, "every or polymetallic colloids, wherein the protective agents are citric acid, phosphoric acid, ocheric acid, succinic acid, polyphosphoric acid, heteropolyacid, silicic acid, Boric acid, N- (2-acetamidine) -iminodiacetic acid, acetylene dicarboxylic acid, amino acid, N-acetamidine glycine, N-acetamyl-L_lysine, adipic acid, oxalic acid, cis Butene monoacid, ethylenediaminetetraacetic acid, 2-amino-2-fluorenylbutanedioic acid, 2-amino-4-fluorenylglutaronic acid, 8-amino-1-naphthol-3, 6 -Disulfonic acid, aminosuccinic acid, azelaic acid, benzene-1,2,3-tricarboxylic acid, butylmalonic acid, pantothenic acid, camphor + acid, N-benzyl ester-L-aminosuccinic acid , S-carboxymethyl-L-cysteine, malic acid, citrazine, 1,1-cyclohexanediacetic acid, 1,2-cyclohexanediamine—N, N, N ', N 'Tetraacetic acid, 1,2-cyclohexanediacetic acid, 1,4-cyclohexanedicarboxylic acid, diethyltriaminepentaacetic acid, phenylartaric acid, 2,2-dimethylarsine , 2, 4-Difluorenylglutaric acid, 3, 3-dimethylglutaric acid, phthalic acid, terephthalic acid, glutaric acid, 2, 2- Methyl succinic acid, 2,3-dimethyl succinic acid + 2, 2 'one dithiophosphoric acid, 5,5, - dithiobis (2 - nitrobenzoic acid), benzyl 2169-6175-PF (N2); Tcshiau.ptd Page 19 200427505 6. Scope of patent application Acid, 2,2'-dithiosalicylic acid, salicylic acid, ethylenedioxane (ethylamine) -N, N, N ', N' -tetraacetic acid, glutamic acid, hexafluoroglutaric acid, η- (2-hydroxyethyl) -ethylenediaminetriacetic acid, 5-hydroxyisophthalic acid, m-benzene Dicarboxylic acid, maleic acid, rhodopic acid, malonic acid, weicyl acetic acid, fluorenyl lactic acid, mucoic acid, 3 ~ sodium phthalic acid, oxalic acid, 2, 2, -Hydroxydiacetic acid, pimelic acid, 2-oxoglutaric acid, amine triacetate, 5 ~ sulfosalicylic acid, taurine, or alkali or ammonium salts of these acids, or 1, 1 , ~ Bi-naphthalene, 4, 4-biphenyldiol, Ν, Ν,-bis (2-aminoaminoethyl) 1 3 Propanediamine, Ν, Ν-bis (3-aminopropyl) methyl Amine, sebacic acid bis (2 ~ ethoxyethyl acetate,), sebacic acid bis (2-ethylhexyl), 2, 2-bis (hydroxymethyl ^ -2, 2 ', 2' '- Nitrogen triethanol, biuret, i-butanediol, l-alcohol, 1,4-butanediol. Γ ２ · The unitary system or the unitary system described in item 1, 2 or 3 of the scope of patent application Metal colloids, at least one of the protective agents in * has reducing ability.% Colloid 5: Mono- or polymetallic metals as described in the item Γ Ξ LL 八A protective agent from mid to late is sodium citrate, sodium boronate, t-pyrrolidone, oxalate, EDTA disodium salt. P 范围 专利 Monovalent or as described in item 2, 2, 3, 4 or 5 of the patent scope Xifan 糸 metal colloid, among which the metal species are palladium, palladium, silver, 糸 Rhodium, Chin, Hungry, Iron, Ming, Lu, Copper, Marriage. The metal colloids described in item 1, 2, 3, 4 or 5 of the range of ρ7 yuan are Yuanyuan or Vultures, in which the metal germplasm is sieve, knot, titanium, starved, hafnium, Syria, baht, zinc, germanium , Tin, Lu, M Barium 'Boron,' any one. ’ ZUU4Z / DUD 6. Scope of patent application • Kinds of mono- or multi-system genus ® M Please refer to patent scopes 1, 2, 3, 4, and r: the method of making the body, such as the method of making metal colloids of the Shenyuan system, 6 or The unitary system or more described in item 7, the special purpose is: dissolving one or more protection agents in a solvent; a solution of salt and one or two agents; dispersing metal ions in a solution to reduce the foregoing Metal ions are added as reducing agents to form nano particles in the aforementioned solution. Knee 9: Lee ΐΓ: All kinds of broad-elementary or multivalent metals, λτ /, A to V A protective agent is sodium citrate, sodium borate, N-methylpyrrolidine, oxalate Edta • two sodium salt. 10. The method for producing a mono- or multi-component or colloid according to item 8 or 9 of the scope of the patent application, wherein the reducing agent is sodium borohydride, hydrazine, dimethylaminoborane, trimethylaminoborane. / 11. The method for producing a mono- or polymetallic colloid according to item 8, 9 or 10 of the scope of the patent application, wherein the solvent is N, N, -dimethylformamide, ethanol, methanol, Propanol, tetramethylfuran. 1 2 · The method for producing a mono- or multi-metal colloid as described in item 8, 9, 10, or i J of the scope of the patent application, in which 1 to 500 times equivalent to 100 times equivalent of the metal salt is added. Reducing agent to reduce metal ions. 1 3 · — A method for producing a multi-element metal colloid, which is produced by a method as described in item 8, 9, 10, 11 or 12 of the scope of patent application, including a plurality of metal colloids formed by different metal species. Metal colloids of nano particles, and a plurality of metal colloids produced by mixing to compound metal species 2169-6175_PF (N2); Tcshiau.ptd Page 21 200427505 6. Patented Nanoparticles. inn 2169-6175-PF (N2); Tcshiau.ptd page 22