330 results about "Manganese(II,III) oxide" patented technology

The invention discloses an aqueous zinc-ion battery positive electrode material. A preparation method of the material is a one-step hydrothermal method and comprises the steps of adding a certain amount of potassium permanganate into deionized water, performing stirring under a room temperature to obtain a deep violet solution, transferring the solution into a high-pressure kettle, and adding a three-dimensional substrate material into the solution for hydrothermal solution; washing the three-dimensional substrate material for many times after cooling of hydrothermal solution, and performing drying in a baking oven to obtain a uniform nanometer flower spherical Mn3O4 material grown on the three-dimensional substrate material. The prepared material is initially applied to prepare the aqueous zinc-ion battery positive electrode material, has high specific capacity and favorable cycle stability, is moderate in reaction condition and simple in process and is suitable for production on a large scale.

The invention relates to a manganese oxide-graphite phase carbon nitride composite photocatalytic material and a preparation method thereof. The manganese oxide-graphite phase carbon nitride composite photocatalytic material is prepared by depositing manganese oxide nanoparticles on the surface of layered graphite phase carbon nitride, and the manganese element loading capacity of manganese oxide in the composite photocatalytic material is 0.3-1.2 mol%; manganese dioxide or trimanganese tetroxide or dimanganese trioxide or a mixed oxide of manganese dioxide, trimanganese tetroxide and dimanganese trioxide is adopted as manganese oxide. Manganese oxide in the composite photocatalytic material is uniformly loaded on graphite phase carbon nitride, the loading capacity is controllable, the good catalytic capacity is achieved, a manganese oxide cocatalyst is closely combined with graphite phase carbon nitride, therefore, the defects that a single photocatalyst is high in photoproduced electron hole pair composite ratio and low in photocatalytic efficiency are effectively overcome, the solar utilization efficiency is greatly improved, and the excellent catalytic activity is achieved when the composite photocatalytic material is used for photocatalytic hydrogen production. The composite photocatalytic material has the wide application prospect in the fields of photocatalysis, electrochemistry, energy, environments and the like.

Production of electronic high purity manganic manganous oxide by manganese oxide ore is characterized by taking manganese oxide ore as materials, immersing manganese from manganese oxide ore under ordinary pressure and temperature by sulfur dioxide, removing iron, copper, nickel, lead heavy metal ion in manganese sulfate mother liquid, obtaining purified manganese sulfate solution, coordinating the ammonia water and ammonium acid carbonate, depositing manganese, obtaining hydrated manganic hydroxide and manganese carbonate mixture, high temperature roasting the mixture, cooling washing for 3-5 times, drying to obtain manganic manganous oxide or inducing directly the purified manganese sulfate solution into ammonia water, regulating pH value 8-10 with solution temperature 50-70deg.C, inducing the dried air or oxygen for 6-9hrs, washing 3-5 times, filtering, drying to obtain manganic manganous oxide . It achieves low cost, high utilizing rate and product purity.

The invention relates to a method for preparing a carbon-coated manganese-doped lithium titanate negative electrode material of a lithium ion battery. In the method, the amount of doped manganese and experimental conditions are controlled; lithium salt, manganese dioxide or manganese tetroxide, titanium dioxide and sugar or glucose are used as raw materials; and the raw materials are put in a ball mill for ball milling, and are dried and sintered to obtain a carbon-coated manganese-doped lithium titanate composite material. In the method, carbon coating is performed on the doping inside lithium titanate cells and the outside of grains by using manganese ions and the lithium titanate is modified simultaneously, so the electrical conductivity of the lithium titanate is greatly improved, the cyclical stability and the reversible capacity of large currents are obviously improved, and the performance requirements of the negative electrode material of a power lithium ion battery are met. The method has a simple preparation process and is easy to realize industrialization; and the carbon-coated manganese-doped lithium titanate composite material obtained by the method has excellent electrochemical performance, realizes the optimal combination of the maximum reversible circulation capacity and the optimal high electrical conductivity, and can be applied to high-power lithium ion batteries.

The invention discloses a method for preparing trimanganese tetroxide by using manganese sulfate solution. The method comprises the following steps of: regulating the pH value of the manganese sulfate solution by using an alkali substance to convert the manganese sulfate solution into manganese hydrate solution; and adding ion liquid into the solution, performing microwave auxiliary heating in a state of exposing in the air, oxidizing manganese hydrate into the trimanganese tetroxide, and filtering, washing and drying the trimanganese tetroxide to obtain brown red trimanganese tetroxide solid. The method has the advantages of high conversion rate (the lowest conversion rate is not less than 60.45 percent) of the trimanganese tetroxide and large specific surface area (the largest specific surface area can reach 187m<2> / g). The invention also has the advantages of low production cost, easy operation and convenience for realizing industrialized production.

The invention discloses a method for preparing nano trimanganese tetroxide. The method is characterized by comprising the steps of by selecting waste banana peels as a raw material, drying in air, cutting into small pieces, heating with water, extracting active ingredients, reacting with potassium permanganate, filtering, and drying to obtain the nano trimanganese tetroxide which has the particle size of 10-80 nanometers, has good capacitance property and high energy storage property and serves as an electrode material for supercapacitors. Compared with the prior art, the method has the advantages that the preparation process is simple, low in cost, environmental friendly and rich in resource, and the product has the application advantage and has good economic, social and ecological benefits.

The present invention relates to a manganic oxide catalyst for toluene liquid-phase catalytic oxidation to prepare benzoic acid and benzaldehyde, its preparation method and application. The described manganic oxide can be manganese dioxide, manganese sesquioxide, trimanganese tetraoxide and manganese monoxide and other mixed valence manganic oxide, and said catalyst can be prepared by means of thermolysis method, hydropyrolysis process or precipitation process. Said catalyst has higher activity, selectivity and stability.