500 results about "Ferric nitrate nonahydrate" patented technology

The invention relates to a method for preparing a composite potassium ferrate solution, which belongs to the chemistry and chemical industry and water treatment agent preparation process technical field. The method comprises the following preparation processes that: firstly, a sodium hypochlorite solution reacts with sodium hydroxide, a white salt substance is generated first and is subject to pumping filtration, then ferric nitrate is added according to a molar mass ratio of sodium hypochlorite to ferric nitrate being equal to between 1.5 and 2.0 to 1, the reaction temperature is between 20 and 45 DEG C, and the pumping filtration is performed after 1.5 to 2.0 hours of reaction; and then a filtrate is added with a saturated potassium hydroxide solution to ensure that the filtrate is transformed into a potassium ferrate solution. Then 0.06 to 0.16mol/L of calcium hypochlorite is added, the reaction temperature is controlled to between 10 and 30 DEG C, the reaction time is between 10 and 30 minutes, and finally the composite potassium ferrate solution with good stability is produced. The composite potassium ferrate solution prepared by the method has good stability, long preservation time, difficult decrease of high iron content, and easiness for industrialized production. The product can be widely used for purification treatment of algae-laden water, city domestic sewage and so on.

The invention discloses a preparation method of a composite nanomaterial of a nano ZnO substrate and a graphene nanosheet. Nano ZnO and the graphene nanosheet are composited to form the composite nanomaterial in a sol-gel method and mechanical alloying combined mode, so that the preparation method is simple and easy to realize and short in reaction time; the finished composite nanomaterial is good in chemical stability; graphene has higher conductivity and can adjust an energy band structure of nano ZnO; nano ZnO has a higher seebeck coefficient, and the nano ZnO substrate and the graphene nanosheet are synthesized, so that interface scattering of phonons can be increased significantly; a recombination rate of an electron-hole pair can be reduced; the appearance of nano ZnO can be adjusted; the heat conductivity of nano ZnO can be reduced; and the photocatalytic efficiency of nano ZnO can be improved. Nitrate of to-be-doped ions comprises any one of aluminum nitrate, ferric nitrate, cobalt nitrate, nickel nitrate, silver nitrate and gold nitrate.

The invention relates to a soft and hard double template method for preparing three-dimensional ordered macroporous iron oxide with a mesoporous pore wall, belonging to the field of multi-phase catalysis. The method comprises the steps of: under the conditions of normal temperature, normal pressure and ultrasound, dissolving ferric nitrate nonahydrate and a soft template P123 into the mixed solution of absolute ethyl alcohol or absolute methanol and anhydrous ethylene glycol; soaking hard template PMMA microballoons which are arranged in a close packing way into the mixed solution; and finally, carrying out suction filtration by using the mixed solution containing the PMMA, drying and programming heating and calcining, and obtaining the hree-dimensional ordered macroporous iron oxide which has rhombohedral structure and the mesoporous pore wall. The iron oxide with macroporous and mesoporous double-mold pore channel structure has good application prospect in the fields such as multi-phase catalysis, absorption, pigment, etc.

A metal oxide-loaded molecular sieve catalyst comprises pure cryptomelane type manganese dioxide and transition metal. A method for preparing the molecular sieve catalyst comprises the following steps: 1, preparing solution of potassium permanganate; 2, preparing solution of manganese acetate; 3, adding the solution obtained by the step one into a three-neck flask, and heating, condensing and refluxing the solution; 4, adding the solution obtained by the step two into the three-neck flask of the step three, condensing and refluxing the solution, filtering and drying the obtained black pasty sediment, and roasting the sediment to obtain an octahedral manganese oxide molecular sieve catalyst (OMS-2) solid; 5, adding cerium ammonium nitrate, cobalt nitrate hexahydrate, copper nitrate trihydrate, ferric nitrate nonahydrate or yttrium nitrate into deionized water to form solution; and 6, mixing the solid taken from the step four and the solution in the step five, soaking cerium on the octahedral manganese oxide molecular sieve catalyst (OMS-2) solid, and drying and roasting the obtained solid to obtain the metal oxide-loaded molecular sieve catalyst. The metal oxide-loaded molecular sieve catalyst has the characteristics of high purification efficiency, low price and good thermal stability.

The invention relates to a method for preparing an iron modified SBA-15 mesoporous molecular sieve, which comprises the following steps of: 1) adding nonionic surfactant and ferric nitrate nonahydrate into solution prepared from hydrochloric acid and deionized water in a volume ratio of 1 to 10 with pH of about 1, and stirring the solution at the room temperature till the solution is clear and transparent; 2) adding tetraethoxysilane into the mixed solution obtained in the step 1), placing the mixed solution into an ultrasonic pool, acting ultrasonic wave on the mixed solution for 2 hours, adjusting the pH of the mixed solution to between 3 and 4, transferring the mixed solution to a reaction kettle, and hydro-thermally crystallizing the mixed solution for 24 hours at the temperature of 100 DEG C to form the iron modified SBA-15 mesoporous molecular sieve; and 3) filtering the reaction solution obtained in the step 2), repeatedly washing a filtered substance by using water and drying the filtered substance, and calcining the filtered substance for 6 hours at the temperature of 550 DEG C to obtain the SBA-15 mesoporous molecular sieve of which iron ions are high dispersed inside and outside a skeleton. The method reduces the reactive ageing time to 2 hours from 20 hours, does not need to use a mineralizing agent NH4F, greatly shortens the reaction period, and reduces the reaction cost.

The invention discloses an efficient refuse landfill odor adsorbent and preparation and application thereof. According to the odor adsorbent, iron ions are loaded on the surface of active carbon. According to the preparation method, cocoanut active carbon is taken as a carrier, and ferric nitrate is taken as a precursor; and the preparation method comprises the steps of loading Fe(NO3)3 on the surface of the active carbon by an immersion method, and drying an obtained sample for removing water at a temperature of 100-120 DEG C to obtain the modified active carbon adsorbent. The modified active carbon adsorbent has a good effect when being used for removing malodorous components such as thiol and thioether in odor, is simple to prepare and easy in control of process and has a high industrial application value.

The invention provides a preparation technology of butadiene catalyst by oxidative dehydrogenation of butane, which comprises the following steps of: dissolving an iron sheet by dilute nitric acid to prepare ferric nitrate solution, adding mixed serous fluid of calcium chloride, calcium hydroxide and zinc oxide, taking ammonia water as precipitator to gelatinize ferric nitrate solution, adding binder and activated carbon to age, cooling to be room temperature, filtering and washing, and retaining a filter cake; performing spray granulation for the filter cake; and activating in a rotary kiln in a roasting way, and screening out catalyst spherical particles with the particle size from 40 mu m to 200 mu m by a vibrating screen after roasting. The catalyst prepared by the preparation technology is high in yield, even in particle size, hard to smash, and good in wear resistance, so that the loss of the catalyst can be reduced, the use quantity of the catalyst can be saved, and the economic benefit can be improved.

The invention discloses a preparation method and a use method of polyacrylamide-acrylic acid-VDT physical-crosslinking high-strength hydrogel. The preparation method comprises the steps: firstly, fully stirring acrylamide, VDT and acrylic acid in dimethyl sulfoxide to obtain an even mixed solution; thermally initiating the mixed solution at a certain temperature to obtain soft preformed gel; thensoaking the soft preformed gel in a water solution of ferric nitrate nonahydrate; forming multi-hydrogen bonds from the VDT, and forming physical-crosslinking high-strength hydrogel through a metal coordination interaction formed by ferric ions and carboxyl. The hydrogel material has the performance of quickly and selectively forming strong hydrogen bonds with target molecules in the water solution, adsorbing the target molecules of specific structures and gathering the target molecules. A preparation process of the preparation method disclosed by the invention has the advantage of simplenessand convenience in operation; furthermore, product performance is excellent; meanwhile, the hydrogel can be applied to the fields of matter separation and purification, sensing technologies, analysistechnologies and the like.

The invention relates to a preparation method of a BiFeO3 material, a BiFeO3/TiO2 composite film and an application thereof. The preparation method of the BiFeO3 material comprises the steps: firstly, dissolving bismuth nitrate and ferric nitrate into ethylene glycol monomethyl ether to obtain a solution I; then, dissolving citric acid into the solution I to obtain a solution II; and next, regulating the PH value of the solution II to 3-5 by using acetic acid to obtain a BiFeO3 sol. The BiFeO3/TiO2 composite film comprises a substrate, wherein the substrate is coated with double layers of films which are respectively a BiFeO3 film layer and a TiO2 film layer. The absorptivity of the BiFeO3/TiO2 composite film on a visible light wave band is greatly improved through the absorption spectrum test and theoretical analysis on the double layers of films. The BiFeO3/TiO2 composite film is applied to the preparation of photovoltaic materials, solar cells, orientation controlled photoelectric functional device materials and visible light catalysis sterilization materials.

The invention relates to a preparation method of a network-like carbon-loaded iron-based compound material and an application of the network-like carbon-loaded iron-based compound material in a lithium-sulfur battery, and belongs to the field of electrochemistry; the method comprises the following steps of taking slightly oxidized graphene as a substrate, taking ferric nitrate nonahydrate as an iron source, taking glucose hydrothermal carbon as a carbon source of iron carbide and a pore-forming substrate, taking ammonia gas generated in the high-temperature pyrolysis process of melamine as a nitrogen source of an iron-nitrogen compound, and meanwhile, enabling ammonia to corrode the glucose hydrothermal carbon substrate to generate a net-shaped structure. The method has the beneficial effects that 1) the process is simple, and the product cost is low; 2) the obtained positive electrode material has a rich hole structure and ion and electron transport channels, the conductivity of the material can be improved, and the loss of the polysulfide compound can be effectively inhibited, the stability of the electrode material is remarkably improved, and the electrochemical performance is improved; and 4) the adsorption and catalysis of the polysulfide compound are achieved by utilizing the synergistic effect of the iron carbide and the iron-nitrogen compound, and the catalytic action can be used for accelerating the reaction dynamics of the lithium-sulfur battery, so that the transition of the soluble polysulfide compound to insoluble sulfide is accelerated, and the shuttle effectis greatly inhibited.

The invention discloses a method for preparing spherical LFP (lithium iron phosphate)/carbon doped composite powder, which relates to a method for preparing spherical LFP (lithium iron phosphate) for lithium-electron anode materials. The method is characterized in that the spherical LFP (lithium iron phosphate)/carbon doped composite powder is prepared by using ferric nitrate nonahydrate, phosphorous acids, lithium carbonates, doping metal ion salts and carbon sources as raw materials through the steps of (1) adding deionized water into the ferric nitrate nonahydrate and the phosphoric acid, reacting the obtained mixture so as to prepare an iron phosphate suspension; (2) adding the lithium carbonates, the doped metal ion salts and the carbon sources into the prepared suspension, grinding the obtained mixture so as to obtain mixed stock; and (3) carrying out spray drying on the mixed stock so as to obtain a precursor, then calcinating the precursor in an inert atmosphere or a weak reduction atmosphere so as to obtain the spherical LFP (lithium iron phosphate)/carbon doped composite powder. The appearance of the spherical LFP (lithium iron phosphate)/carbon doped composite powder synthesized by using the method of the invention seems like a spheroid, the composite powder has LFP (lithium iron phosphate) materials with good electrochemical performance, and the process is simple, therefore, the composite powder is suitable for industrial mass production.

The invention provides solder removing liquid, a preparation method and application thereof. The solder removing liquid comprises the following components in percentage by weight: 15-50 percent of nitric acid, 1-20 percent of ferric nitrate or ferric chloride, 1-5 percent of sulfoacid and the balance of water. The solder removing liquid provided by the invention has the advantages of strong oxidability, high speed of dissolving solder, simpleness and easiness of raw materials, low preparation cost, no containing of a stabilizing agent and simple formulation and favorability of recycling valuable metals in waste liquid; and the waste solder removing liquid formed after desoldering can stand to generate beta-stannic acid sediment and is convenient for recovering tin metal.

The invention discloses a hydrothermal method for preparing triclinic-phase FeVO4 micro particles. The method comprises the following steps of: mixing ferric nitrate nonahydrate, ammonium metavanadate and nitric acid solution in a molar ratio of 1:1:10, adjusting the pH value to 4 or 7 by using 14 weight percent of aqueous ammonia, transferring the solution to a stainless steel self-pressure kettle of which a lining is made of polytetrafluoroethylene, treating the solution for 2 or 6 hours at the constant temperature of 180 DEG C, filtering the solution, washing and drying the filtrate, and heating the filtrate to 600 DEG C from room temperature at the speed of 1 DEG C per minute under air atmosphere and keeping the temperature for 6 hours, wherein when the pH is 4 or 7 and the hydrothermal treatment is performed for 6 hours, the obtained product is a triclinic-phase FeVO4 mesoporous micro bar, and when the pH is 4 and the hydrothermal treatment is performed for 2 hours, the obtained product is a triclinic-phase FeVO4 imperforate micro block. The method is convenient to operate, the raw materials are cheap, and the topography, crystalline phase structure and specific surface area of the target product particles are controllable.

The invention discloses an SCR (Selective Catalytic Reduction) catalyst containing synthetic zeolite and iron, and particularly relates to an SCR catalyst which always has an NOx purifying property in a low-temperature region after being subjected to relatively long-term action of hot water and relatively long-term action of sulfur oxides. A preparation method of the SCR catalyst, disclosed by the invention, comprises the following steps: crystallizing a hydrogenised synthetic zeolite with maximal oxygen cycle number of 8-12 and a three-dimensional structure by using a mixing procedure, and blending with a ferric nitrate (III) water solution or ferric chloride (III) water solution with a pH value of 0.1-0.7 to obtain the SCR catalyst without a filtering procedure and a cleaning procedure.

The invention discloses a preparation method of a poly-metallic oxide-loaded catalytic ozonation catalyst and an application. The preparation method of the catalyst comprises the following steps of: a, activating diatomite, the diameter of which is 1-3mm, in a microwave generator, then immersing the diatomite in a NaOH solution, and taking out the diatomite to dry to obtain pre-treated diatomite; b, immersing the pre-treated diatomite in a mixed solution of copper nitrate, nickel nitrate, manganese nitrate, cobalt nitrate and ferric nitrate to obtain a catalyst precursor; and c, drying the catalyst precursor, and roasting the catalyst precursor at a high temperature to obtain the poly-metallic oxide-loaded catalytic ozonation catalyst. By selecting diatomite as a carrier which is cheap and easily available, the preparation process is simple, and the catalyst is easy to recover and suitable for industrial production on a large scale. The poly-metallic oxide-loaded catalytic ozonation catalyst prepared by the preparation method is used for treating antibiotic industrial wastewater.

The invention discloses an SBA-15 loaded iron-cobalt oxide catalyst, a preparation method and an application thereof in wastewater treatment. The SBA-15 loaded iron-cobalt oxide catalyst comprises 80.0-95.0% of SBA-15 and 5.0-20.0% of iron cobalt oxide, wherein a molar ratio of iron to cobalt in the iron-cobalt oxide is 1:1 to 4:1. The SBA-15 loaded iron-cobalt oxide catalyst is obtained by adding aminoacetic acid into a salt solution containing ferric nitrate and cobalt nitrate, stirring uniformly, then adding SBA-15; stirring for 22-26 hours; heating to a temperature of 280-300 DEG C to carry out a combustion reaction; drying a combustion product and transferring the combustion product into a muffle furnace for calcinations. The catalyst can be used for treating printing and dyeing wastewater. The catalyst provided by the invention is simple in preparation method and low in cost, and has high catalytic activity, low dissolution of metal ions and good stability. The catalyst is mild in reaction conditions and good in treating effect for treating the wastewater.

The invention relates to a novel material for absorbing electromagnetic waves, and in particular relates to a preparation method of a graphene oxide/barium ferrite wave-absorbing material. The preparation method comprises the following steps: forming a sol from analytically pure barium nitrate Ba(NO3)2 and ferric nitrate Fe(NO3)3 with a graphene oxide water solution by taking citric acid and ethylene glycol as a compound complexing agent; continuously heating and stirring the sol to form a gel; and igniting the gel by virtue of microwave-assisted auto-combustion to further prepare the graphene oxide/barium ferrite wave-absorbing material. The preparation method disclosed by the invention is simple and controllable in process, uniform in temperature distribution of the entire system through microwave field heating, and meanwhile, the preparation method can be used for greatly shortening reaction time and greatly improving the wave-absorbing performance of a barium ferrite material with the doping of the graphene oxide.

The invention discloses an iron-doped cerium dioxide photocatalyst and a preparation method thereof, a molecular formula of the iron-doped cerium dioxide photocatalyst is FexCe1-xO2-0.5x, wherein X is 0.05-0.2. According to the preparation method, cerium nitrate, ferric nitrate and sodium carbonate are taken as initial raw materials, a coprecipitation method is employed to obtain flake-like FexCe1-xO2-0.5x, in the preparation process, x value is changed to obtain the FexCe1-xO2-0.5x with different composition. Doping of iron has obvious influence on CeO2 forbidden band width, the FexCe1-xO2-0.5x has good photocatalysis performance, the preparation method and the required equipment are simple, and industrial production can be easily realized.

The invention discloses a preparation method of a nickel-zinc ferrite/polyaniline composite material. The preparation method comprises the following steps: respectively weighing nickel nitrate, zinc nitrate and ferric nitrate in a stoichiometric ratio of 3:2:10 of Ni<2+>:Zn<2+>:Fe<3> in Ni0.6Zn0.4Fe2O4, adding distilled water, and mixing and dissolving under a magnetic stirring condition; dropwise adding a NaOH solution to an obtained mixing solution, regulating pH to 9-11, reacting under a water bath condition until the solution is in a colloidal form; repeatedly centrifuging and washing through distilled water and absolute ethyl alcohol to obtain a brown precipitate; drying the precipitate in an oven at 80-100 DEG C to obtain a ferrite precursor; calcining in a muffle for 2-2.5 hours at 900-1100 DEG C and naturally cooling to obtain the required nickel-zinc ferrite. Processability, stability and electric performance of the material disclosed by the invention are better improved.

The invention belongs to the technical field of preparation of carbon nanotubes, and particularly relates to high-magnification carbon nanotubes having an ultrafine tube diameter and prepared by a two-stage method, a catalyst and a preparation method of the catalyst. The high-magnification carbon nanotube catalyst having the ultrafine tube diameter and prepared by the two-stage method is composedof the following components in parts by weight: an active metal dispersion phase comprising 14.6-25.9 parts of cobalt nitrate, 0.9-2.7 parts of ammonium molybdate, 0-10.9 parts of ferric nitrate and 0-8.4 parts of nickel nitrate; a carrier metal continuous phase comprising 30.9-54.6 parts of aluminum nitrate and 25.4-45.3 parts of magnesium nitrate; and 15.2-22.6 parts of a complexing agent. The active metal particles in the catalyst are small in particle size and large in number, the outer diameter of the carbon nanotubes generated through cracking is 5 nm-10 nm, the multiplying power can reach 45-55 times, and the yield is 1.3-2.0 times of the yield of a conventional superfine carbon nanotube catalyst; the preparation process of the catalyst can effectively control the particle size of the active metal particles in the catalyst, is simple and convenient in technological process, and is beneficial to industrial large-scale production.

The invention discloses a method for preparing completely dispersed alpha aluminum oxide nano particles. The preparation method adopts a chemical precipitation method, and comprises the following steps of firstly dissolving ferric nitrate and aluminum nitrate in water, wherein the proportion of the ferric nitrate to the aluminum nitrate is based on a molar ratio of iron ions to aluminum ions of 5: 1-9: 1; regulating pH value to be 6-9; filtering, washing, drying and precipitating so as to obtain a precursor; calcining the precursor for 0-30 hours at 620-800 DEG C so as to obtain the calcinated product of alpha aluminum oxide and alpha ferric oxide; and removing alpha ferric oxide and other impurities in the calcinated product through acid etching so as to obtain the completely dispersed alpha aluminum oxide nano particles. The method has the advantages that the raw materials are cheap, the technology is simple, and the calcining temperature is low, and the prepared alpha aluminum oxide nano particle are small in size, good in dispersibility, and expected to be used in industry in large scale.

The invention discloses a black nanophase ceramics pigment and a preparation method thereof, the method comprises: dissolving ammonium oxalate, ammonium formate, ammonium acetate and ammonium propionate in water and then mixing evenly with chromic nitrate, manganous nitrate, ferric nitrate and cobalt nitrate, heating the mixture at the temperature of 400-500 DEG C, and combusting until no air gives out to obtain the black nanophase ceramics pigment. The invention has simple reaction conditions, and the raw materials such as the nitrates, the ammonium acetate and the like are medicaments with low price and abundant resource; and the invention is benefit to large-scale industrialized production. The prepared black nanophase ceramics pigment has black color, high temperature-resistance, stable performance and good dispersibility.