331 results about "Cupric Ion" patented technology

The invention relates to a method for preparing copper-titanium dioxide core-shell nanoparticles. In the method, cupric ions provided by cuprous chloride are dissolved into ammonia water; an aqueous solution of polyethylene glycol, an aqueous solution of sodium citrate, an aqueous solution of ascorbic acid, a solution of tetrabutyl titanate (absolute ethyl alcohol) and urea are sequentially addedinto the ammonia water; the ammonia water is put into a teflon-lined stainless steel autoclave after the ammonia water is stirred at room temperature; and the nearly-spherical core-shell nanoparticles are prepared through controlling the temperature and the time for the thermal reaction of the mixed solvents. In the method for preparing the copper-titanium dioxide core-shell nanoparticles, the ascorbic acid serves as a reducing agent and is used for reducing the cuprous ions; and the polyethylene glycol serves as a soft template. The method for preparing the copper-titanium dioxide core-shellnanoparticles has the advantages of simple process, environment-friendliness, low cost and the like; the outer layer of each of the prepared copper-titanium dioxide core-shell nanoparticles is anatase titanium dioxide, and the inner layer of each of the prepared copper-titanium dioxide core-shell nanoparticles is cubic-phase copper elementary substance; and the size distribution is even, and the particle size is controllable, thus the copper-titanium dioxide core-shell nanoparticles can be used as the electrode materials and the photocatalyst materials of dye-sensitized solar cells.

The invention relates to a method for separating copper, cobalt and manganese from a cupric chloride manganese-cobalt-calcium-zinc impurity removal solution. The method comprises the steps that sodium sulfate is added to the cupric chloride manganese-cobalt-calcium-zinc solution, and calcium sulfate is removed by filtration; then sodium carbonate is added to a solution obtained in step one, a pH value is adjusted to 4.0-6.0 to allow copper ions in the solution to be precipitated, and copper precipitates are obtained by filtration separation; the copper precipitates are dissolved with sulfuric acid and are subjected to evaporation crystallization to form copper sulfate crystals; manganese powder is added to a solution after copper removal to allow cobalt ions to be reduced to cobalt powder to be precipitated, and cobalt powder is obtained after the filtration separation and is dissolved with acid to form a cobalt solution; and a solution after cobalt removal contains manganese and a little zinc and calcium, manganese is precipitated through the evaporation crystallization or by adding sodium carbonate, and manganese salts such as rough manganese carbonate are obtained. With the adoption of the method, three main valuable metals, namely copper, cobalt and manganese, can be separated and extracted economically and conveniently.

An etchant of the present invention includes an aqueous solution containing hydrochloric acid, nitric acid, and a cupric ion source. An etching method of the present invention includes bringing the etchant into contact with at least one metal selected from nickel, chromium, nickel-chromium alloys, and palladium. Another etching method of the present invention includes bringing a first etchant that includes an aqueous solution containing at least the following components A to C (A. hydrochloric acid; B. at least one compound selected from the following (a) to (c): (a) compounds with 7 or less carbon atoms, containing a sulfur atom(s) and at least one group selected from an amino group, an imino group, a carboxyl group, a carbonyl group, and a hydroxyl group; (b) thiazole; and (c) thiazole compounds; and C. a surfactant) into contact with a surface of the metal, and then bringing a second solution that includes an aqueous solution containing hydrochloric acid, nitric acid, and a cupric ion source into contact with the surface of the metal. According to the etchant and the etching methods of the present invention, it is possible to etch at least one metal selected from nickel, chromium, nickel-chromium alloys, and palladium quickly and suppress excessive dissolution of copper.

The invention discloses an application of a color development method based on nanogold aggregation to immunodetection. A compound containing terminal alkynyl is used for modifying nanogold, the modified functional nanogold can actively respond to silver ions or cuprous ions, and silver ions or cuprous ions are added, so that the modified functional nanogold produces a color development reaction due to different aggregation degrees, that is to say, a nanogold solution becomes blue from originally red; the color development reaction produced by the functional nanogold due to different aggregation degrees is applied to the immunodetection, and ultraviolet-visible absorption spectrums have a change due to different aggregation degrees of the nanogold, so that the changeable absorption spectrums can be measured through an instrument and quantitative detection in the immunodetection is realized. The ultraviolet-visible absorption spectrums in the color development reaction can be not only observed through naked eyes but also represented through the instrument, and the color development method has positive help for chemical detection, especially the immunodetection.