100results about How to "Realize large-scale industrial application" patented technology

The invention discloses a preparation method for a metal organic framework-derived tricobalt tetroxide-modified titanium dioxide nanotube array. The method comprises the following steps: firstly performing pretreatment on a titanium sheet substrate material; performing electrochemical treatment on the treated titanium substrate material by using an ethylene glycol solution containing ammonium fluoride and water as an electrolyte, and performing calcination by using a muffle furnace to change a titanium dioxide crystal form; secondly, performing cobalt hydroxide electrodeposition by means of athree-electrode electrochemical workstation and by using cobalt nitrate hexahydrate as an electrolyte, a titanium dioxide nanotube array as a working electrode, a platinum sheet as a negative electrode and silver/silver chloride as a reference electrode; performing hydrothermal treatment on the titanium dioxide nanotube array to form ZIF-67 in situ; and finally, performing secondary calcination byusing a muffle furnace to obtain the ZIF-67-derived porous tricobalt tetroxide-modified titanium dioxide nanotube array. The method disclosed by the invention can effectively improve absorption capacity of TiO2 on visible light, promote separation of electron hole pairs, and improve photocatalytic degradation efficiency of organic pollutants.

The invention discloses a method for recovering sulfur from atmospheric-pressure oxygen-rich leached residues of lead-zinc ores, and particularly relates to the recovery of sulfur in lead-zinc ore leached residues through vacuum distillation, belonging to the field of reclamation and reuse of solid waste resources. The method comprises the following steps of: placing atmospheric-pressure oxygen-rich leached residues, subjected to drying, milling and screening pretreatment, of lead-zinc ores into a vacuum distillation furnace, heating the residues to 200-400 DEG C, and controlling the pressure of the inside of the furnace to 600-10000 Pa, so that sulfur in the leached residues is sublimated and volatilized; pumping sulfur-containing vapor out of the distillation furnace by a vacuum pump; and cooling the sulfur-containing vapor so as to obtain a sulfur product. After the distillation is completed and the sulfur is completely volatilized, high-boiling-point residues are discharged out of the distillation furnace in a solid powder form. In the whole process, the furnace is internally sealed, thereby avoiding the oxidation and environmental pollution of elemental sulfur. The method is simple in technological process and equipment, high in sulfur recovery rate and product quality, low in energy consumption, strong in adaptability to raw materials and pollution-free, so that the method disclosed by the invention is an economic and efficient sulfur extraction method and can realize the zero discharge of waste smelting residues in a lead-zinc wet process, thus the method has broad application prospects.

A grading technology for cold-pressed pelletizing and shaft furnace magnetization roasting of powdery refractory iron oxide ore comprises the following steps: 1, preparing a combined binder through using clay or bentonite, and industrial magnesium chloride; 2, fragmenting the powdery refractory iron oxide ore, mixing with the combined binder to prepare cold-pressed balls, and sieving; or grinding the powdery refractory iron oxide ore, grading through a strong magnetic process, dehydrating, mixing with the combined binder to prepare the cold-pressed balls, and sieving; or carrying out strong magnetic selection to produce ore tailings, enriching through an ore selection process, dehydrating, mixing with the combined binder to prepare the cold-pressed balls, and sieving; 3, drying materials which cannot pass through a sieve, sieving the dried materials, returning materials which pass through the sieve to a pelletizing operation, sending balls which cannot pass through the sieve to a double combustion chamber shaft furnace to undergo a reduction reaction, cooling, and completing ore grinding and weak magnetic grading through an ore grinding and grading system. According to the technology, a large amount of idle or abandoned low-grade powdery iron oxide ore is recycled, the particle size range of ore roasted in the shaft furnace is enlarged, the shaft furnace magnetization roasting of the powdery refractory iron oxide ore is realized, and the shaft furnace is maximally utilized to complete the ore roasting.

The invention relates to an ammonia gas sensor loaded with platinum particles and a preparation method thereof, and belongs to the field of gas sensors. A gas sensitive material is composed of the platinum particles and a graphene film. The platinum particles are loaded on the graphene film carrier. The method includes the following steps: (1) preparing the graphene film and keeping for later use;(2) using ultraviolet ozone to modify the graphene film obtained in the step (1) and keeping for later use; and (3) impregnating the modified graphene film in the step (2) in a platinum chloride solution, and heating and insulating the graphene film after the impregnation so as to decompose chloroplatinic acid into the platinum particles to obtain the ammonia gas sensitive material loaded with the platinum particles on the graphene film. According to the preparation method, through the ultraviolet ozone treatment, the graphene film is firstly modified by introducing an oxygen-containing functional group, increasing defect sites and adsorption sites of the film, changing resistance characteristics and wettability of the film and loading the platinum particles onto the graphene film. The gas sensitive sensor prepared according to the method has excellent room temperature response performance to ammonia gas.

The invention discloses a preparation method of a calcium-based adsorbent. According to the preparation method, natural quartz stone powder (including a main component SiO2) and active carbon powder are taken as raw materials for preparing silicon oxynitride by adopting a carbon thermal reduction method; and silicon oxynitride is used as an inert supporting material and is treated by a process of immersing, drying and calcining to load CaO so as to prepare the calcium-based adsorbent. By controlling the CaO precursor and calcining conditions, relatively good circulating stability is obtained. The raw material has a wide source, the preparation method is simple and convenient and the operability is strong; and the problem that the adsorption capacity of the high-temperature CO2 calcium-based adsorbent is reduced after a plurality of times of CO2 adsorption/desorption cycles is improved very well.

The invention relates to a high-entropy ceramic modified coating with controllable components and a controllable microstructure, and a preparation method thereof. The high-entropy ceramic modified coating is a mixed coating formed by any four or more elements selected from zirconium (Zr), titanium (Ti), hafnium (Hf), tantalum (Ta), niobium (Nb), vanadium (V), chromium (Cr), molybdenum (Mo) or tungsten (W) and a substrate coating. The substrate coating comprises SiC-Si, ZrC-ZrSi2 or TiC-Ti. The preparation method comprises the following steps: pre-treating a base material; and mixing a solvent and a binder, carrying out ultrasonic dispersion, then adding a corresponding high-entropy ceramic precursor raw material TMxOy and other raw materials to prepare a uniform slurry suspension solution, and carrying out dipping-drying curing to obtain a pre-coating layer. According to the method, the high-entropy ceramic does not need to be prepared in advance, only the corresponding precursor raw materials are used for coating the surface of the base material through a simple material coating method, and a (carbon, nitrogen, carbon nitrogen or boron) compound high-entropy ceramic solid solution is generated in situ in a infiltration process, so solid solution strengthening effect can be achieved, the cohesion binding force of the coating is high, the hardness and high-temperature oxidation corrosion resistance of the coating can be further improved, and large-scale industrial application can be achieved.

The invention discloses lightweight and high-strength silicon carbide foamed ceramic and a preparation method thereof, and belongs to the technical field of foamed ceramic preparation. Polyurethane foam is used as a template, and high-carbon-residue resin and absolute ethyl alcohol are uniformly mixed to prepare slurry with different viscosities. A foamy carbon precursor with a controllable pore rib structure and strength is obtained through the steps of slurry hanging, drying and pyrolysis carbonization, and then the lightweight and high-strength silicon carbide foamed ceramic is prepared through in-situ gas-solid carbon thermal reduction reaction sintering. Compared with a traditional template method, the method of the invention has the following advantages that the residual carbon amount of a carbonized foamy carbon skeleton is regulated by controlling the slurry hanging amount, so that the pore rib structure, porosity and strength of the silicon carbide foamed ceramic product are controlled. The silicon carbide foamed ceramic prepared by the method is of a three-dimensional open-pore internet-shaped skeleton structure, and has the structural characteristics of hollow pore rib core part, smooth and compact pore rib wall and the like, and the product has the characteristics of light weight and high strength.

The invention provides a Serratia marcescens Xd-1 strain with an accession number of CGMCC No. 7734 and a synchronous extraction and fermentation production method for prodigiosin by using the strain. The method is characterized by comprising the following steps: preparing primary seed liquid of the strain; preparing secondary seed liquid of the strain; mixing a liquid fermentation medium with a volume of V and the secondary seed liquid with a volume of 1 to 8% of V in a container and carrying out fermentation for 6 to 18 h under the fermentation conditions of a rotating speed of 130 to 200 r/min, oxygen flux of 0.5 to 1.5 v/(v.m) and fermentation temperature of 25 to 35 DEG C; and adding an extractant with a volume of 8 to 20% of V into the container and continuing fermentation under the fermentation conditions, wherein total fermentation time is 32 to 64 h.

The invention discloses a coal dealkalization method. The method comprises the following steps: (1) grinding raw coal to be dealkalized to obtain coal powder; (2) mixing the coal power obtained in the step (1) with eluent to obtain a mixed solution of coal and water, wherein the eluent is a water solution of a water-soluble organic solvent and the volume fraction of the water-soluble organic solvent is in a range of 5 to 20%; introducing gas containing carbon dioxide into the coal-water mixed solution obtained in the step (2), stirring the mixed solution to soak and wash the coals for 3 to 24 hours at a temperature of 20 to 60 DEG C to make carbon dioxide become excess; (4) subjecting the coal-water mixed solution, which has been processed in the step (3) to solid-liquid separation to obtain solids, and finally drying the solids to obtain the dealkalized coal. The provided method has the advantages of good dealkalization effect, mild reaction conditions, simple technology, and low cost.

The invention relates to a composite heat storage material based on steel slag-coal gangue and a preparation method thereof. The heat storage material comprises the following components in percentage by mass: 35-45% of steel slag, 40-50% of coal gangue, 0-10% of a sintering aid and 0-10% of a modifier. According to the invention, after the raw materials are subjected to the procedures of crushing, grinding, mixing, compression molding, sintering and the like, the obtained heat storage material is high in strength, the specific heat capacity is 1.1-1.3 J/g.DEG C, the heat conductivity is 2-3 W/m.K, and the cost is only 1/3 of that of a current marketized heat storage material; the heat storage material is wide in application range, low in cost, safe, reliable, long in service life, and simple in related preparation process, special process and equipment requirements do not exist, and further industrial production can be realized; and industrial wastes such as steel slag, coal gangue and the like are fully utilized in the formula, so that the environmental pollution caused by the solid wastes and the like can be greatly relieved, and the resource utilization of the solid wastes is realized.

The invention discloses a transparent thin film transistor device based on zirconium oxide and lanthanum oxide, which comprises a conductive glass substrate, a dielectric layer, a semiconductor layerand an upper metal electrode which are sequentially arranged from bottom to top, the upper metal electrode comprises a source electrode and a drain electrode, and the dielectric layer is made of a mixed oxide of zirconium oxide and lanthanum oxide. The insulating layer and the semiconductor layer of the TFT are prepared by adopting a solution method, so that low-cost and large-area TFT preparationis realized, and equipment and raw material investment is relatively low; and the method is compatible with a traditional process in process, and the preparation cost can be effectively controlled.

The invention provides a surface treatment method for improving the corrosion resistance of carbon steel, and belongs to the technical field of material surface treatment. According to the surface treatment method, an iron-based layered double hydroxide film with a corrosion inhibiting anion intercalation is prepared on the surface of the carbon steel directly, the corrosion resistance of the carbon steel can be improved, the adhesion of an organic coating applied to the surface of the carbon steel is increased, and the long-term corrosion resistance of the carbon steel is enhanced. The surface treatment method mainly comprises the following steps that (a) pretreatment is carried out on the surface of the carbon steel; (b) an iron-based layered double hydroxide film is prepared on the surface of the carbon steel; and (c) the iron-base layered double hydroxide film obtained in the step (b) is subjected to corrosion inhibiting anion exchange to prepare the iron-based layered double hydroxide film with the corrosion inhibiting anion intercalation. The surface treatment method is easy to operate, low in cost and stable in performance, and has high practical application value.

The invention discloses a device and method for mineralizing and fixing CO2 and preparing fine calcium carbonate by carbide slag. The device is a novel circulation-separation-integrated slag dissolving reactor for leaching calcium components in carbide slag, and comprises an airlift circulation reactor, a solid-liquid separator and other accessories. The invention also provides a novel method forpreparing calcium carbonate by mineralizing and fixing CO2 by using carbide slag, which comprises the following circulation processes: a), putting carbide slag and a NH4Cl solution into a circulation-separation-integrated slag dissolving reactor, and introducing air to form circulation so as to obtain CaCl2 solution and NH3-containing air; b), absorbing the NH3-containing air with water to obtainammonia water; recycling air after NH3 is removed; c), introducing the CaCl2 solution and ammonia water into a mineralization tower to react with CO2 in the waste gas, and performing separating to obtain calcium carbonate and NH4Cl solution; and d), evaporating and concentrating the NH4Cl solution for recycling, and using evaporated water for absorbing ammonia gas to finish circulation; the device is easy to amplify, and large-scale industrial application is facilitated.