41 results about "Lanthanide nitrate" patented technology

The invention discloses a sealing agent for aluminum and aluminum alloy anode oxide films and a preparation method for the sealing agent. The sealing agent comprises the following raw materials by lL: 15-20g of lanthanide nitrate, 0.6-0.8g of oxidizing agent, 0.25-0.3g of stabilizing agent and deionized water, wherein the additive amount of the deionized water is the amount of adding the deionized water until the volume is constant at 1L after the rest raw materials are mixed. According to the sealing agent disclosed by the invention, by utilizing the combined action of rare-earth metal and the oxidizing agent, porous layers of the anode oxide films can be effectively sealed, and the corrosion resistance of the anode oxide films is obviously improved. Meanwhile, the sealing agent disclosed by the invention does not contain chromium, nickel or fluorine, therefore, the human body cannot be harmed, and the environment cannot be polluted. The sealing agent is a green environmental-protection sealing agent. Moreover, the aluminum and aluminum alloy anode oxide films can be sealed at normal temperature, therefore, not only is the energy consumption reduced but also the operation convenient is improved. After being treated by the sealing agent disclosed by the invention, the aluminum and aluminum alloy anode oxide films are compact in surface structure, is in uniform golden yellow and is higher in bonding strength.

The invention relates to titanium dioxide photocatalyst for natural light degradation of organic matter and its manufacturing method. The catalytic agent is composed with a lanthanide of the rare earth and the mixture of C element and a substratum of titanium dioxide. In the components, the mole content of lanthanide is 0.01%-5% and the C mole content is 0.01%-5%. C adulterates in the volume phase in order to replace the O of titanium dioxide; the rare earth element adulterates in the volume phase of titanium dioxide, or deposits in the surface, or the both. The catalytic agent is manufactured by the collosol and gelatinous way. The invention mixes the solution of fetrabutyl titanate, absolute alcohol and glacial acetic acid with the solution of absolute alcohol in the lanthanide nitrate. Under stirring the solution mentioned above, add the water solution of tetra butyl group ammonium hydroxide, in order to make the PH up to 4-6. Then after laying it until being the gel, make it be desiccated, abraded and roasted, so the photocatalyst can be required. The catalytic agent can be used for the natural light degradation of the organic matter, and has no impressed luminaire so that it can save energy.

The invention relates to a preparation method of a catalyst for synthesizing methacrylic acid. The preparation method comprises the following steps: preparing a heteropoly compound catalyst by adopting an ionic liquid and metal salt step-by-step precipitation method; performing a reaction on a molybdenum-containing compound, a vanadium-containing compound and phosphoric acid to obtain solution orslurry A; preparing imidazolium ionic liquid into solution B; preparing alkali metal nitrate, transition metal nitrate and lanthanide nitrate into mixed aqueous solution C; adding the B and the C into the A in a step-by-step precipitation and aging mode; and then obtaining the catalyst by concentrating, drying, forming and roasting. The catalyst prepared by the method has high activity and high selectivity for the reaction of preparing methacrylic acid by carrying out gas-phase oxidation on methylacrolein and has high mechanical strength and high thermochemical stability.

An in situ ligand generated and ligand crystallized lanthanide complex has the following chemical formula: Ln3L4(NO3)2(H2O)2H3O, wherein Ln is lanthanide rare earth ion, L is an organic ligand 1,1-[7,7'-bis-(8-hydroxy negative ion quinoline)]. The organic ligand is in situ generated during the preparation process of a lanthanide coordination polymer and has the following molecular formula: [C20H14N2O2]2-. A preparation method of the lanthanide complex comprises the following steps of: 1) dissolving 8-hydroxyquinoline, lanthanide nitrate and sodium azide in ethanol, stirring and sealing in a hydrothermal kettle; and 2) insulating at 120-140 DEG C for two days and cooling to room temperature according to a program to obtain a bulky crystal, namely the target. The invention has the following advantages: the organic ligand which is directly obtained by a one-pot method participates in coordination to obtain the lanthanide complex; the synthesis of the ligand and the complex is simple and easy to operate; and the compound obtained has good fluorescence performance and magnetic function.

The invention relates to a preparation method of a zinc oxide-metal organic framework composite antibacterial material. Lanthanide-series MOFs which are good in biological property and easy to prepareare adopted as a framework material; the MOFs-Ln is prepared from thiodiacetic acid (TDA) and lanthanide nitrate. Through two-step stripping, the particle sizes and porosity of the MOFs-Ln can be adjusted, so MOFs structures of different sizes are obtained; and then, zinc nitrate, sodium hydroxide and sodium chloride are used for growing ZnO NPs on the surface and in pores of the MOFs-Ln in an in-situ growth mode, so the ZnO NPs@MOFs-Ln material with good antibacterial performance can be obtained. The morphology and particle size of MOFs-Ln can be regulated and controlled by changing the content and reaction time of TDA and lanthanide nitrate and changing a stripping mode, so the subsequent growth size of ZnO NPs is influenced, and the generation of nanoscale ZnO particles with high antibacterial activity is limited; and the material has efficient antibacterial effects.

The invention provides a preparation method of a rare earth heat stabilizer. The method comprises the following steps: (1) dissolving lanthanum nitrate and neodymium nitrate into ethanol, preparing a 2.4mol/L rare earth-ethanol solution, controlling the molar ratio of the lanthanum nitrate to the neodymium nitrate to be 0.78: 0.25, transferring the rare earth-ethanol solution into a reaction vessel, and heating up to 75-90 DEG C; (2) preparing a 1.2mol/L sodium hydroxide water solution, dripping the prepared sodium hydroxide water solution into the rare earth-ethanol solution, controlling the molar ratio of hydroxide ions to two rare earth cations to be 3: 1.03, and reacting for 10-20 minutes; (3) adding stearic acid into the reaction vessel for three times, wherein the amount of the stearic acid added for the first time is 50% of the total adding amount, the amount of the stearic acid added for the second time is 30% of the total adding amount, and the amount of the stearic acid added for the third time is 20% of the total amount; controlling the molar ratio of the stearic acid to the rare earth cations to be 3: 1.03, and reacting for 20-30 minutes; and (4) filtering the product, washing with water, drying, crushing and grinding to obtain the powdered stearic acid rare earth heat stabilizer. The method is simple in technology, less in three wastes and high in yield.

The invention discloses novel green fluorescent powder with Tb<3> doped tungstate. The novel green fluorescent powder is chemically composed of (Gd0.9Tb 0.1) 2 (WO4) 3. The synthesis method of the fluorescent powder includes that lanthanide nitrate and a sodium tungstate solution are mixed according to chemometry to serve as parent salt solution which is moved to a reaction kettle after complete mixing, the parent salt solution is then put in an air dry oven for reaction for a certain time under high temperature and high pressure, and white precipitates are obtained; white precursor powder isobtained via centrifuging, cleaning and drying on the basis of the white precipitates, and finally, the novel green fluorescent powder with Gd2 (WO4) 3: Tb<3+> is obtained via calcination. The prepared fluorescent powder is good in green emission, energy transfer effect exists among Gd<3+>->Tb<3+>, light intensity of Tb<3+> can be enhanced remarkably, and the novel green fluorescent powder is expected to be a lighting display material of the new generation.

The invention discloses a preparation method of a La modified Cu-SSZ-13 molecular sieve. The Cu-SSZ-13 molecular sieve catalyst is prepared by adopting a one-step method; then ion modification is performed on the prepared molecular sieve by using a lanthanum nitrate solution to obtain the La-modified Cu-SSZ-13 molecular sieve catalyst, wherein the catalytic performance of La (0.015-Cu-SSZ-13) is obviously improved compared with that of Cu-SSZ-13, and the catalyst has better N2 selectivity.

The invention discloses a preparation method of pearl wool particles for a pillow inner material, and the method comprises the following steps: (1) uniformly mixing a sodium silicate solution and a sodium bicarbonate solution to obtain a silica gel sol system, and adding polyvinyl alcohol, tricalcium phosphate, the sodium silicate solution and the sodium bicarbonate solution to obtain a silica gelgel system; (2) adding a cobalt naphthenate and lanthanum nitrate solution into the silica gel gel system, and reacting to obtain an antibacterial agent; and (3) adding low-density high-pressure polyethylene, talcum powder and polylactic resin into an extruder, pumping butane, an antibacterial agent, carvacrol and monoglyceride into the extruder, reacting to form a foaming body, extruding, drawing and cutting the foaming body to obtain pearl wool, and treating the pearl wool by adopting a home textile pearl wool machine to obtain the pearl wool particles for the pillow inner material. The prepared pillow inner material is excellent in softness, resistant to dirt and particularly remarkable in antibacterial effect, and does not mildew after being used for a long time.

The invention provides a wastewater organic pollutant degradation system based on a perovskite three-dimensional electrode, which comprises a three-dimensional electrochemical reactor, wastewater containing organic pollutants is degraded in a tank body of the three-dimensional electrochemical reactor under the action of an electric field generated between an anode plate and a cathode plate of the three-dimensional electrochemical reaction, and a perovskite type particle electrode material is filled between the cathode plate and the anode plate of the tank body. The perovskite type particle electrode is an activated carbon particle electrode loaded with perovskite type oxide on the surface, the preparation raw materials of the perovskite type particle electrode comprise lanthanum nitrate, ferric nitrate, citric acid and water, and activated carbon is mixed before gel is formed. By preparing the perovskite type particle electrode material and using the perovskite type particle electrode material in the three-dimensional electrochemical reactor, the degradation efficiency of the three-dimensional electrochemical reactor on organic pollutants in wastewater can be improved.

The invention relates to a conductive multi-element composite oxide, and aims to provide a preparation method of a multi-element composite rare earth oxide with a highly conductive layered structure. Including: using citric acid and structure inducer X as solute, using gel accelerator and deionized water as solvent to prepare precursor solution A; using lanthanum nitrate and tin tetrachloride pentahydrate as solute, using deionized water as solvent , to prepare precursor solution B; add precursor solution A dropwise to precursor solution B to form a uniform transparent solution, and continue to react under stirring to obtain a uniform sol; after aging to form a wet gel, then vacuum freeze-drying treatment, The multi-component complex oxide block is prepared; after grinding, sieving and calcining, the multi-component complex rare earth oxide with high conductivity layered structure is obtained. The product obtained by the present invention has a multi-microchannel layered structure, which can increase the concentration of electron-hole pairs in the multi-element composite oxide phase and improve its electrical and thermal conductivity. The reaction synthesis conditions are simple, the cost is low, and it is favorable for large-scale production.

The invention discloses a microemulsion method for preparing nanometer cathode Ln2NiO4 of a solid oxide fuel cell, which relates to a preparation method of cathode material Ln2NiO4 of a solid oxide fuel cell, and aims to solve the problems of poor chemical stability and high polarization resistance of a cathode material of an existing solid oxide fuel cell. The preparation method comprises the following steps of: (1) mixing and stirring an oil phase, a surface active agent and a cosurfactant to obtain a solution, and dividing the solution into two equal parts; (2) dissolving soluble lanthanide nitrate and nickel nitrate in water, and adding an obtained solution into a solution obtained in the step (1); (3) dissolving alkali into water, and adding an obtained alkali solution into the other solution obtained in the step (1), thereby obtaining microemulsion; and (4) mixing the two microemulsion, centrifuging and washing the microemulsion to obtain a solid-phase matter, and sintering the solid-phase matter at a high temperature to obtain the nanometer cathode Ln2NiO4. The polarization resistance of the nanometer cathode Ln2NiO4 is 0.5ohm.cm<2>, and the chemical stability of the nanometer cathode Ln2NiO4 is good. The microemulsion method provided by the invention is mainly applied to cathodes of solid oxide fuel cells.

The invention discloses a preparation method of a nanofiber. The preparation method comprises the following steps: a, dissolving 0.1458-0.4374 part of lanthanum nitrate and 0.1263-0.3789 part of aluminum nitrate in 5-15 parts of N,N-dimethylformamide, and adding 0.825-2.475 parts of polyvinylpyrrolidone to obtain an electrostatic spinning precursor solution; b, preparing a La(NO3)2/Al(NO3)3/PVP precursor fiber by an electrostatic spinning method; and c, drying and sintering at the temperature of 730-850 DEG C to obtain the LaAlO3 nanofiber. The invention further discloses the obtained LaAlO3 nanofiber and application of the LaAlO3 nanofiber in a supercapacitor electrode. The LaAlO3 nanofiber prepared by the method is uniform and continuous in thickness, the diameter is 50-80 nm, the fibersize is greatly reduced, the specific surface area is increased, and the electrochemical performance of the LaAlO3 fiber material is favorably improved.

The invention discloses modifying agent used for PE waste plastic recycle. The modifying agent comprises polyethylene-maleic anhydride, epoxy resin, terpene resin, urea resin, epoxidized soybean oil,triethanolamine, silane coupling agent and lanthanide nitrate. The modifying agent is used for reprocessing of PE waste plastic, can effectively improves overall quality of the PE plastic, promotes the PE plastic to recover to process and use performances of the original plastic, promotes sound development of a reprocessing industry of the PE waste plastic, and has great population and use values.