40 results about "Niobium(V) chloride" patented technology

The invention relates to nano powder material preparation and application and provides a niobium and indium co-doped nano tin oxide powder preparation and application method. The method includes: taking and adding niobium chloride, indium trichloride and chloride pentahydrate into deionized water, and well dissolving to form uniform mixed solution; adding a complexing agent to perform complexing reaction of metal cations; adopting ammonium hydroxide solution to adjust solution pH value to 7-12, and continuing reaction to form sol; adjusting rotary evaporation temperature, and continuing reaction to form wet gel; drying, and subjecting obtained powder to grinding, screening and sintering to obtain niobium and indium co-doped nano tin oxide powder. By effective modification of tin oxide surface structural characteristics, the foundation is provided for subsequent compounding with a silver substrate, and silver-based electrical contact composite materials can be further improved in density, electricity and hardness performance.

The invention relates to the technical field of electrochemical energy source materials and provides a phosphorus niobium oxide preparation method. The method includes: dissolving columbium pentachloride into an alcohol solvent, and subjecting to reduction reaction under airtight conditions to obtain a niobium oxide precursor; putting red phosphorus and the niobium oxide precursor in an upstream area and a downstream area of a flowing protective atmosphere respectively; heating the upstream area into a first area temperature in a range of 425-550 DEG C, keeping the temperature for 1-10h, heating the downstream area to a second area temperature in a range of 650-950 DEG C, and performing combination reaction to obtain a phosphorus niobium oxide. The preparation method is simple, easy to operate and free of high-corrosiveness reagents, thereby being a green environmental-friendly process.

The invention relates to a graphene / niobium pentoxide composite electrode material and a preparation method thereof. The preparation method comprises the following steps: 1) mixing and stirring the graphene oxide dispersion liquid and carbodiimide compounds, and heating to reflux for reaction; 2) dissolving niobium pentachloride in absolute ethanol, adding to step 1) 3) adding a reducing agent to the reaction solution obtained in step 2) for a reduction reaction; 4) performing a solvothermal reaction on the reaction solution obtained in step 3), collecting a solid product, washing, and drying; 5) Annealing the dried solid product in step 4) under the protection of an inert gas to obtain the graphene / niobium pentoxide composite electrode material. The graphene / niobium pentoxide composite electrode material prepared by the preparation method can have high specific capacity and cycle performance while charging and discharging at a high speed.

The invention relates to a vermiculite surface in-situ grown potassium niobate material and a preparation method thereof.The preparation method includes: adopting a one-step hydrothermal method; placing vermiculite in a solution containing potassium hydroxide and niobium pentachloride; controlling nucleation and growth of KNbO3 on vermiculite by controlling reaction temperature and time, wherein potassium niobate grows on the surfaces of inner and outer layers of two-dimensional layered vermiculite in-situ through a one-dimensional needle-like structure to form a KNbO3 / VMT material of a three-dimensional material, and KNbO3 and vermiculite interact through chemical bonds, so that adhesion force is large.The preparation method is simple and convenient in process.The material can be used as a photocatalytic material.The problem that reaction raw materials are prone to loss, difficult to store and separate and high in recovery cost due to the fact that only KNbO3 powder can be adopted as a catalyst in the past is solved.

The invention relates to a nanometer spectral long-acting catalyst capable of highly-efficiently decomposing organic pollutants under dark light and light-free conditions. The nanometer spectral long-acting catalyst is composed of, by weight, 100 parts of water and 3 to 20 parts of nanometer modified niobium oxide. The nanometer modified niobium oxide is prepared through the following steps: dissolving 3 to 10 parts by weight of niobium pentachloride in 100 parts by weight of absolute ethyl alcohol at room temperature so as to obtain an ethanol solution of niobium pentachloride, and carrying out standing for 5 to 30 min; adding 5 to 15 parts by weight of bismuth vanadate and 0.01 to 0.1 part by weight of blocked isocyanate into the ethanol solution of niobium pentachloride and carrying outuniform mixing so as to obtain a first mixed solution; dripping 100 parts by weight of an aqueous solution of ethanol into the first mixed solution at a speed of 3 to 10 ml / min while stirring the first mixed solution; adding N,N-dimethyl formamide, continuing stirring the first mixed solution for 30 min and carrying out standing at room temperature so as to obtain a second mixed solution; and carrying out soaking and drying, putting a dried substance into a muffle furnace and carrying out calcining at 400 to 500 DEG C so as to obtain the nanometer modified niobium oxide. The nanometer spectral long-acting catalyst has good catalysis effect under dark light and light-free conditions.

The preparation of oxygen-sensing sensor includes the steps of: preparation of titanium trichloride doped with certain amount of niobium or tantalum pentachloride as source matter; addition of hydrogen peroxide as strong oxidant and DBS surface cladding agent and stirring at 50-70 deg.c water bath for 3-5 hr to form gel; mixing obtained powder with terpineol and painting the mixture to ceramic tube with brush-type electrodes; sintering in a muffle furnace at 380-450 deg.c for 1 hr to prepare niobium or tantalum pentachloride doped TiO2 nanometer powder, addition of heating filament to prepare the thick-film oxygen-sensing element; and aging through electrical heating for 10 dyas. The present invention has low working temperature, high sensitivity, fast response and high stability.

The preparation method of a phosphorus-selenium co-doped niobium disulfide nanomaterial of the invention belongs to the technical field of preparation of clean energy storage and conversion materials. The niobium pentachloride and the degassed oleylamine were mixed and stirred magnetically, heated to 300 °C under the protection of nitrogen, and injected into CS 2 The sulfur source was kept at this temperature for 2 hours, and then naturally lowered to 200°C. The TOP-Se solution prepared in advance was injected. The temperature of the system was rapidly increased to 320°C and kept for 1 hour. , to obtain phosphorus-selenium co-doped niobium disulfide nanoflowers. The invention realizes for the first time the synthesis of niobium disulfide nanomaterials with controllable phosphorus and selenium co-doping morphology, fills the vacancy of such transition metal sulfide synthesis technology, and provides conditions for its research in the field of catalytic materials.