摘要:
A method of producing particles having nano-sized grains, the method comprising the steps of: (a) preparing a solution containing one or more metal cations; (b) mixing the solution from step (a) with one or more surfactants to form a surfactant/liquid mixture and (c) heating the mixture from step (b) above to form the particles.
摘要:
The invention relates to a method for the production of nanostructured skutterudites of the CoSb 3 type from a solution of the corresponding precursor acetate salts and a polymer. The method includes a step of atomisation or electrospinning in order to eliminate the solvent from said solution and to nanostructure the precursor that is subsequently heat-treated under an inert atmosphere.
摘要:
The present invention relates to an organic-inorganic composite comprising bacteria and transition metal oxides and a method of manufacturing the same. More specifically, the present invention relates to an organic-inorganic composite comprising bacteria and transition metal oxides manufactured by attaching cationic transition metal precursor to bacterial surface, wherein the bacteria with high negative charge on its surface is used as a template, refluxing the bacteria and transition metal ions at room temperature in the presence of sodium borohydride (NaBH 4 ), and inducing reduction/spontaneous oxidation, thereby having an excellent high capacity electrochemical properties, and a method of manufacturing the same. Therefore, the method of manufacturing the organic-inorganic composite according to the present invention has advantages that it enables to reduce manufacturing cost and the time required therein, mass production, low temperature synthesis, synthesis of uniform nano-structures, control of one dimensional type, be applied to other metal oxides, thus being expected to be used as parts in other electrochemical fields including lithium secondary batteries, super capacitor, nanoelectro-optical system, catalyst and the like.
摘要:
In a hydroformylation reaction, the circulation and recovery of cobalt carbonyl in a cobalt catalyst cycle using carbonylate as an intermediate and acidification thereof, is improved by supplying an aqueous sulfuric acid solution containing less than 16 %wt of sulfuric acid to the carbonylate to control sulfuric acid concentration in the carbonylate/acid mixture, before accounting for any acid consuming reaction, to a value of from 2% to 10% by weight. Single step and multistage liquid/liquid extraction techniques as well as vapour/liquid extraction techniques followed by the absorption of cobalt from the vapour in an organic liquid both benefit from this improvement.
摘要:
A method of producing particles having nano-sized grains, the method comprising the steps of: (a) preparing a solution containing one or more metal cations; (b) mixing the solution from step (a) with one or more surfactants to form a surfactant/liquid mixture and (c) heating the mixture from step (b) above to form the particles.
摘要:
The present invention is directed to a process for making nanoparticles of metals, metal alloys, metal oxides and multi-metallic oxides, which comprises the steps of reacting a metal salt dissolved in water with an alkali metal salt of C 4-25 carboxylic acid dissolved in a first solvent selected from the group consisting of C 5-10 aliphatic hydrocarbon and C 6-10 aromatic hydrocarbon to form a metal carboxylate complex; and heating the metal carboxylate complex dissolved in a second solvent selected from the group consisting of C 6-25 aromatic, C 6-25 ether, C 6-25 aliphatic hydrocarbon and C 6-25 amine to produce the nanoparticles.
摘要:
57 Procédé de préparation des cobalttétracarbonylates alcalins ou alcalino-terreux par réaction d'un dérivé du cobalt ( + 2) avec l'oxyde de carbone caractérisé en ce que l'on opère en présence d'une base minérale prise dans le groupe formé par les hydroxydes alcalins ou alcalino-terreux et les bicarbonates alcalins ou alcalino-terreux et d'au moins un dérivé du soufre qui comporte au moins un atome de soufre dont le degré d'oxydation est inférieur ou égal à + 3 en milieu aqueux, alcoolique ou hydroalcoolique. Ces composés peuvent être utilisés comme catalyseur dans lés réactions de carbonylation des dérivés organiques à groupes halométhyle.
摘要:
The present invention is directed to a process for making nanoparticles of metals, metal alloys, metal oxides and multi-metallic oxides, which comprises the steps of reacting a metal salt dissolved in water with an alkali metal salt of C 4-25 carboxylic acid dissolved in a first solvent selected from the group consisting of C 5-10 aliphatic hydrocarbon and C 6-10 aromatic hydrocarbon to form a metal carboxylate complex; and heating the metal carboxylate complex dissolved in a second solvent selected from the group consisting of C 6-25 aromatic, C 6-25 ether, C 6-25 aliphatic hydrocarbon and C 6-25 amine to produce the nanoparticles.
摘要:
The present invention relates to an organic-inorganic composite comprising bacteria and transition metal oxides and a method of manufacturing the same. More specifically, the present invention relates to an organic-inorganic composite comprising bacteria and transition metal oxides manufactured by attaching cationic transition metal precursor to bacterial surface, wherein the bacteria with high negative charge on its surface is used as a template, refluxing the bacteria and transition metal ions at room temperature in the presence of sodium borohydride (NaBH 4 ), and inducing reduction/spontaneous oxidation, thereby having an excellent high capacity electrochemical properties, and a method of manufacturing the same. Therefore, the method of manufacturing the organic-inorganic composite according to the present invention has advantages that it enables to reduce manufacturing cost and the time required therein, mass production, low temperature synthesis, synthesis of uniform nano-structures, control of one dimensional type, be applied to other metal oxides, thus being expected to be used as parts in other electrochemical fields including lithium secondary batteries, super capacitor, nanoelectro-optical system, catalyst and the like.
摘要:
In a hydroformylation reaction, the circulation and recovery of cobalt carbonyl in a cobalt catalyst cycle using carbonylate as an intermediate and acidification thereof, is improved by supplying an aqueous sulfuric acid solution containing less than 16 %wt of sulfuric acid to the carbonylate to control sulfuric acid concentration in the carbonylate/acid mixture, before accounting for any acid consuming reaction, to a value of from 2% to 10% by weight. Single step and multistage liquid/liquid extraction techniques as well as vapour/liquid extraction techniques followed by the absorption of cobalt from the vapour in an organic liquid both benefit from this improvement.