12 results about "Manganese doping" patented technology

This invention discloses a method for preparing 1,3-propanediol by hydrogenation of methyl 3-hydroxypropionate. Using manganese-doped layered copper silicate prepared by deposition precipitation as a precursor, a highly dispersed and stable copper-based catalyst is obtained through reduction. The manganese doping and layered copper silicate species enhance the interaction between copper and the support, improving the dispersion of active copper species. Simultaneously, the layered copper silicate increases the difficulty of copper species reduction, thereby improving the Cu content of the catalyst. + / Cu 0 The strong metal-support interaction and the dispersing effect of manganese can effectively inhibit the migration and aggregation of active copper species during the reaction, thus improving the stability of the catalyst. The copper-based catalyst prepared in this invention exhibits high conversion and 1,3-propanediol selectivity in the hydrogenation reaction of methyl 3-hydroxypropionate, with high catalytic activity and stability, and few byproducts, showing good prospects for industrial application.

The application discloses a preparation method of a manganese-doped ruthenium-based metal nanoparticle catalyst, and relates to the technical field of catalysts, in particular to a preparation method of a manganese-doped ruthenium-based metal nanoparticle catalyst.The preparation method comprises the following steps: ultrasonic dissolving a ruthenium salt and a manganese salt in hydrochloric acid to obtain a homogeneous solution; adding carbon black into the homogeneous solution, stirring and drying to obtain a manganese-doped ruthenium-based metal nanoparticle catalyst precursor; carrying out high-temperature annealing reduction treatment on the precursor to obtain a manganese-doped ruthenium-based metal nanoparticle catalyst loaded on the surface of the carbon black; carrying out heat treatment to obtain a manganese-doped ruthenium-based metal nanoparticle catalyst without a carbon black carrier; and immersing in an acid solution to remove unstable manganese substances to obtain the manganese-doped ruthenium-based metal nanoparticle catalyst.The application further discloses the catalyst obtained by the above preparation method and application of the catalyst in electrocatalytic oxidation of nitrogen to prepare nitrate.The method can obtain a manganese-doped ruthenium-based metal nanoparticle catalyst in the form of uniform, super-small nanoparticles, and the manganese-doped ruthenium-based metal nanoparticle catalyst has good electrocatalytic oxidation of nitrogen performance and stability when applied in electrocatalytic oxidation of nitrogen to prepare nitrate.

This invention belongs to the field of hydrometallurgical technology, specifically relating to a method for enhanced gold extraction from cyanide tailings based on magnetically controlled hydrothermal magnetization activation and manganese doping treatment. The method includes: providing cyanide tailings particles; adding the cyanide tailings particles and a biomass reducing donor to an aqueous medium to form a slurry; adjusting the pH of the slurry to obtain an alkaline reaction system; adding a magnetothermal medium of ferric oxide or ferric chloride to the slurry and stirring with MnSO4 to obtain a reaction slurry; placing the reaction slurry in a closed magnetically controlled hydrothermal reactor and conducting a hydrothermal reaction under an external magnetic field; after cooling the reaction product, performing solid-liquid separation; performing graded magnetic separation on the solid phase; leaching the non-magnetic product using a thiosulfate-ammonia system to allow gold to enter the leaching solution; adding a recyclable magnetic gold-capturing carrier to the leaching solution for adsorption and enrichment; recovering the carrier through magnetic separation and regenerating it through analysis to obtain a gold-rich solution; and recovering gold from the gold-rich solution. The above method can stably achieve a synergistic gain in gold extraction and harm reduction under low-temperature hydrometallurgical conditions.

This invention proposes a method for preparing a honeycomb-structured biomatrix-mediated hydrophobic calcium-based adsorbent, comprising the following steps: preparing a stabilizer gel, a template agent solution, and a precursor mixture containing calcium and manganese sources respectively; mixing the template agent solution and the stabilizer gel to form a supramolecular mixture; adding the supramolecular mixture dropwise to the precursor mixture to form microspheres and aging them; subjecting the microspheres to directional freezing and then freeze-drying to form honeycomb-like channels within the microspheres; calcining the microspheres under an inert atmosphere to form a hydrophobic carbon film and inducing manganese doping to form oxygen vacancies, thereby obtaining a honeycomb-structured biomatrix-mediated hydrophobic calcium-based adsorbent. This invention reduces the diffusion resistance of carbon dioxide in the calcium-based adsorbent, making it difficult for the calcium-based adsorbent to aggregate during high-temperature cycling, reducing the interference of water molecules, and improving the adsorption performance for carbon dioxide.

This application discloses a manganese-doped two-dimensional hybrid perovskite material, its preparation method, and its applications, belonging to the field of materials science. The chemical formula of the manganese-doped two-dimensional hybrid perovskite material is C2. 22 H 36 Br4N2Pb: 5.8–60% Mn. This manganese-doped two-dimensional hybrid perovskite material is an organic-inorganic hybrid perovskite compound with excellent scintillation properties. Its synthesis method is simple, low-cost, mild under mild reaction conditions, and highly stable. It has good application prospects in photodetectors, photovoltaic devices, field-effect transistors, light-emitting diodes, and scintillator imaging.

This invention discloses a fluorescent material of divalent manganese-doped Zn₂GeO₄, its preparation method, and a high-sensitivity optical pressure measurement application based on this material, belonging to the field of fluorescent material preparation and pressure sensing applications. The material is prepared using a DC arc method and has the general chemical formula: Zn₂GeO₄:xMn 2+ Where 0.002 ≤ x ≤ 0.030. Mn 2+ Replace Zn 2+ The location shows a single broadband green light emission at 533nm, originating from... 4 T1( 4 G) to 6 A1( 6 S) Energy level transition. The preparation method of the divalent manganese-based fluorescent material described in this invention is low-cost, convenient to operate, and also has the characteristics of green synthesis. The intensity ratio pressure measurement method based on the single fluorescence emission peak of this material exhibits extremely high pressure sensitivity and has important application prospects in the field of optical pressure measurement under extreme environmental pressure scenarios.

This invention relates to the fields of electrocatalytic materials and industrial electrochemistry, and discloses a composite coated titanium anode with an intermediate layer, its preparation method, and its application. The preparation method includes: titanium substrate pretreatment, electrochemical deposition of a gold intermediate layer, preparation of a manganese-doped iridium dioxide active coating solution, thermal decomposition coating, and repeated sintering steps. This invention utilizes a dual synergistic strategy of a gold intermediate layer and manganese-doped IrO2 to achieve dense coverage of the gold intermediate layer and in-situ growth of the manganese-doped IrO2 active layer in the same thermal decomposition process. The gold intermediate layer not only acts as a conductive and passivation-resistant barrier but also stabilizes high-valence manganese by inducing lattice strain. Manganese doping precisely regulates the electronic structure of Ir sites, significantly enhancing intrinsic activity. The anode prepared by this invention exhibits excellent performance in PEM electrolysis and copper plating tests. The preparation process of this invention is simple, cost-controllable, and compatible with existing production lines, and can be widely applied in PEM water electrolysis, electrolytic copper foil, and other electronic electroplating fields.

The application discloses a manganese-doped Cu7S4 nanomaterial and a preparation method and application thereof. The manganese-doped Cu7S4 nanomaterial comprises a Cu7S4 nanomaterial and manganese elements doped in the Cu7S4 nanomaterial, and the manganese-doped Cu7S4 nanomaterial has an enzyme-like catalytic performance. The preparation method comprises the following steps: reacting a mixed reaction system containing Cu2O, polyvinylpyrrolidone, a manganese salt and a hydroxide to obtain a Cu2O / Mn(OH)2 composite; and then reacting NaHS to obtain the manganese-doped Cu7S4 nanomaterial. The manganese-doped Cu7S4 nanomaterial provided by the application has a unique and novel structure, higher enzyme-like catalytic effect, high stability, long-term storage, and is beneficial to clinical application of tumors, and the preparation method is simple and easy to implement, low in cost, universal and beneficial to large-scale production.

This invention discloses a manganese-doped nickel diselenide cathode material, its preparation method, and its applications, belonging to the field of zinc-iodine battery technology. The invention utilizes a hydrothermal synthesis method, employing nickel nitrate and manganese nitrate as metal precursors, selenium powder as a selenium source, and hydrazine hydrate as a reducing agent. The process involves mixing and ultrasonication, hydrothermal reaction, centrifugation, washing, and vacuum drying. Manganese doping induces localized lattice distortion in nickel diselenide, driving the transition of the nickel center's electronic configuration from a low-spin to a high-spin state. Simultaneously, it optimizes the material's electronic structure and surface adsorption properties, significantly accelerating iodine redox kinetics and suppressing the polyiodide shuttle effect. The manganese-doped nickel diselenide cathode material provided by this invention has a simple preparation process and excellent performance, providing key material and technical support for the development of high-rate, long-life aqueous zinc-iodine batteries, and is suitable for large-scale energy storage applications.

The present application relates to the technical field of manganese dioxide preparation, in particular to a method for deep purification and impurity removal of manganese sulfate solution for electrolytic manganese dioxide. The preparation process comprises the following steps: preliminary treatment of crude manganese sulfate solution; preparation of iron-manganese doped carbon adsorbent from lignin; complex precipitation of heavy metal ions in the treated manganese sulfate solution by sodium lignosulfonate and iron-manganese doped carbon adsorbent; preparation of byproduct from the filter residue in step S3 by high-temperature pyrolysis. The present application prepares iron-manganese doped carbon adsorbent from high-temperature pyrolysis of lignin, and adsorbs heavy metal ions in the manganese sulfate solution by the iron-manganese doped carbon adsorbent. The carbon adsorbent obtained after high-temperature treatment of lignin has a certain effect of flocculating metal ions, and can complex with heavy metal ions in the manganese sulfate solution to form solid complexes, thereby removing other heavy metal ions in the manganese sulfate solution and improving the purity of the manganese sulfate solution, laying a foundation for the preparation of high-purity manganese dioxide.

The application discloses an armored vehicle low-temperature sodium ion battery positive electrode material and a preparation method thereof, and particularly relates to the technical field of electrochemistry, and relates to an armored vehicle low-temperature sodium ion battery positive electrode material and a preparation method thereof; the armored vehicle low-temperature sodium ion battery positive electrode material is prepared from ferric chloride hexahydrate, manganese chloride tetrahydrate, sodium ferrocyanide and carboxylated multi-walled carbon nanotubes through co-precipitation synthesis and dehydration, phosphating hydrothermal reaction, carbon nanotube winding and thermal reduction, and surface polymer coating; the manganese iron-based prussian white with an open three-dimensional ion channel is used as an active framework, the intrinsic electronic structure is optimized by using manganese doping, and the content of crystallization water hindering ion migration is effectively controlled by using an accurate low-temperature dehydration process in the synthesis, so that the sodium ion diffusion capacity and charge transfer efficiency of the material in a low-temperature environment are improved.