41results about How to "Realize industrial application" patented technology

The invention relates to a ruthenium nano-cluster / trinickel disulfide heterojunction composite material as well as a preparation method and application thereof. According to the composite material, foamed nickel serves as a substrate material, a Ni3S2 nanosheet array grows on the surface of the substrate material in situ, and ruthenium nanoclusters are anchored on the surface of the Ni3S2 nanosheet array to form the heterojunction composite material. According to the preparation method, the Ni3S2 nanosheet array grows on the foamed nickel substrate in situ, then the composite material with the ruthenium nanocluster anchored on the Ni3S2 surface is prepared through a chemical etching method, and the preparation method is simple, relatively low in cost and suitable for large-scale production; the prepared heterojunction composite material forms a nanosheet array structure and shows a honeycomb structure, so that the catalyst has a relatively large specific surface area, provides more active sites for catalytic reaction, is high in catalytic activity, and can be used as a catalyst applied to hydrogen evolution and oxygen evolution of water electrolysis reaction in electro-catalysis.

The invention relates to an acetylene selective hydrogenation catalyst and a preparation method and application thereof, and relates to the technical field of catalysts, the acetylene selective hydrogenation catalyst comprises the following components by weight percentage: 0.02-0.08 wt.% of Pd, 0.1-0.5 wt.% of Ag, 0.1-0.5 wt.% of Ni, 0.1-0.5 wt.% of Ti, 0.1-0.5 wt.% of Ti, 0.1-0.5 wt.% of Ti, and the balance of Fe. The catalyst comprises the following components in percentage by weight: 0.5-5wt% of alkali metal and the balance of an aluminum oxide carrier. The acetylene selective hydrogenation catalyst provided by the invention is stable in active component, relatively high in strength and strong in adaptability, so that the catalyst has excellent catalytic activity and stable operation capability in a relatively wide temperature range, and the defects in the prior art are overcome.

The invention relates to the technical field of flue gas denitration catalysts, in particular to a high-temperature denitration catalyst and a preparation method thereof.The preparation method comprises the following steps that a titanium source, an aluminum source and an alcohol polymer are added into absolute ethyl alcohol, heating and stirring are conducted, and a mixed solution is obtained; the preparation method comprises the following steps: dropwise adding a mixed solution of absolute ethyl alcohol and distilled water into the mixed solution, hydrolyzing to obtain initial gel, and drying and roasting the initial gel to obtain a nanosheet TiO2-Al2O3 oxide; the preparation method comprises the following steps: dipping a nano flaky TiO2-Al2O3 oxide into a vanadium source and a molybdenum source, and then carrying out drying and roasting treatment, so as to obtain the V2O5-MoO3 / TiO2-Al2O3 high-temperature denitration catalyst. The high-temperature denitration catalyst prepared by the invention has excellent denitration activity and sulfur resistance under the condition of high-temperature and high-sulfur flue gas, and effectively solves the problems of poor denitration activity and sulfur resistance of the existing denitration catalyst under the condition of high temperature.

This invention relates to a method, apparatus, and packaging structure for in-situ packaging of fruits and vegetables using blown fiber spinning, addressing the current issues of efficiency and effectiveness in the use of nanofibers in fruit and vegetable packaging. This method selects carboxymethyl chitosan (CMCH) and polycaprolactone (PCL) as base materials, and uses SBS technology to directly deposit CMCH / PCL nanofibers layer by layer onto the surface of fruits and vegetables, forming a tightly adhered and stable fiber coating. The apparatus in this invention uses spiral-patterned conveyor rollers to simultaneously transport fruits and vegetables while performing blown spinning, achieving rapid and continuous in-situ packaging of fruits and vegetables. The in-situ packaging of this invention can be easily peeled off by hand, and it also serves as an excellent carrier for active substances, effectively inhibiting gray mold in fruits and vegetables. The in-situ packaging film forms a barrier on the surface of fruits and vegetables, reducing weight and hardness loss and delaying the ripening period after harvest.

The application relates to the environmental protection field and discloses Acidithiobacillus caldus suitable for Sb leaching, wherein the preservation number of the Acidithiobacillus caldus is CCTCC No: M2021710. The Acidithiobacillus caldus disclosed by the application can tolerate a high dose of FCC waste catalyst and has a remarkable removal effect on metals (especially Sb) in the FCC waste catalyst, and is suitable for biological leaching treatment of the FCC waste catalyst.

The invention discloses an ozone-treated organic wastewater comprehensive analysis system and a measurement method, comprising the ozone-treated organic wastewater comprehensive analysis system, an oxygen generator, an ozone generator, an ozone detector, a pump, a water inlet storage tank, an ozone destroyer, an ozone detector and a water outlet storage tank, wherein the air inlet of the ozone-treated organic wastewater comprehensive analysis system is connected to the ozone detector, the ozone detector is connected to the ozone generator, the ozone generator is connected to the oxygen generator, and the water inlet of the ozone-treated organic wastewater comprehensive analysis system is connected to the pump; the problem of ozone catalyst performance detection in the process of ozone catalytic oxidation of organic wastewater in a polluted environment is solved.

The application discloses an economical boron-containing stainless steel for hot neutron absorption, which comprises the following steps: (1) component design; (2) smelting molten steel according to the set component in a vacuum environment, applying electromagnetic stirring in a smelting process, and carrying out casting under a nitrogen protection atmosphere to obtain a casting blank; (3) homogenizing heat treatment of the casting blank for 240-720 min between Ac3 and the melting point of boride (T f ); air cooling to room temperature after discharging; (4) after removing casting defects, inclusions and slag foreign matters by grinding the casting blank after heat treatment, carrying out hot deformation and solid solution treatment; the hot deformation heating temperature and the solid solution treatment temperature are respectively T f 10-80 DEG C and 30-100 DEG C. The application is aimed at the characteristics of high cost and poor hot plasticity of the traditional boron-containing stainless steel for hot neutron absorption, reduces the use of precious metal Ni, improves the hardness of the matrix structure, enhances the deformation coordination of the matrix and boride, greatly improves the hot plasticity, and improves the hot deformation capacity of the material.

The invention belongs to the technical field of metal powder processing, and discloses a smelting device, a smelting system and a metal powder forming system. A flow guide pipe is arranged at the bottom of the crucible, a flow guide channel communicated with the interior of the crucible is arranged in the flow guide pipe, a nozzle is arranged at an outlet of the flow guide channel, a flow channel is arranged in the nozzle, and the flow channel comprises a transition section and a drainage section which are sequentially arranged; a heating unit; the switch control unit comprises a stopper rod which penetrates through the crucible and is inserted into the flow guide channel, a switch valve assembly is arranged at the end of the stopper rod, and the switch valve assembly comprises a plug valve matched with the transition section and a needle valve matched with the drainage section. According to the centrifugal atomization device, the flowing stability of copper liquid flow, the consistency of the liquid flow direction and the specification size, the uniformity of the liquid flow, the constancy of the liquid flow temperature and the consistency of the temperature can be well guaranteed, and therefore the quality of metal powder prepared through centrifugal atomization is guaranteed.

The invention discloses a preparation method of a high-efficiency Na-modified solid solution catalyst and application of the Na-modified solid solution catalyst in a reaction for preparing high-carbon alcohol and co-producing high-carbon olefin from synthesis gas. The catalyst comprises a solid solution component and an auxiliary agent component, the solid solution component is a ferrocobalt solid solution, the auxiliary agent component is a sodium elementary substance or oxide, and a reaction active center is the ferrocobalt solid solution, cobalt and cobalt carbide or cobalt oxide species and the sodium elementary substance or oxide. The invention provides a preparation method and application of a novel Na modified ferrocobalt solid solution catalyst, the catalyst has high activity, high C6 + alcohol and C5 + olefin selectivity and stability, the operation temperature can be in a range of 200-350 DEG C, and the reaction pressure is in a range of 0.5-10 MPa. The catalyst is stable in structure in the reaction process, the preparation method is simple and easy to repeat, and industrial application is facilitated.

The utility model discloses a continuous reaction multistage micro-channel reactor connected in series with a rectifying tower, which comprises a reaction raw material prefabricating system, a raw material conveying system, a first-stage micro-channel reaction system, a first-stage product rectifying and separating system, a second-stage micro-channel reaction system and a product collecting system, a raw material tank is respectively connected with a micro-channel reactor of the first-stage micro-channel reaction system and a second-stage micro-channel reactor of the second-stage micro-channel reaction system through a metering pump arranged in the raw material conveying system, and the micro-channel reactors are communicated with a rectifying tower of the first-stage product rectifying separation system; the outlet end of the rectifying tower is communicated with the inlet end of the second-stage microchannel reactor, and the outlet end of the second-stage microchannel reactor is communicated with the product collecting system. The continuous reaction device is connected with the rectifying tower in series to realize continuous reaction of materials, can be directly used for industrial production, can replace the original kettle type reaction process, and improves the production efficiency.

This invention discloses a pure magnesium and its purification method. The purification method specifically includes the following steps: (1) placing pure Mg into a crucible and placing it in a melting furnace, setting the temperature of the melting furnace to 650~670℃, and introducing CO. 2 and SF 6 The mixture is protected with a gas mixture. After the pure Mg melts, the temperature is raised to 690~720℃. The Mg-5Mn master alloy is added to the crucible. After it is completely melted, the melt is stirred to make the alloy composition uniform. (2) Remove the slag on the surface of the melt, add the refining agent to the melt, and stir it thoroughly. Let it stand for 30~50 min. (3) After the melt cools down, a high-purity magnesium ingot is obtained. This invention can effectively reduce the Fe impurity content in magnesium metal and reduce the inclusions in magnesium metal.

The invention provides a purification and impurity removal method for lithium-containing liquid. The purification and impurity removal method comprises the following steps: (1) mixing a lithium-containing liquid with solid alkali, carrying out a first precipitation reaction to convert iron ions, aluminum ions and magnesium ions in the lithium-containing liquid into hydroxide precipitates, and then carrying out solid-liquid separation to obtain first separation residues and a separation liquid; (2) detecting the pH value of the separation liquid, when the pH value of the separation liquid is greater than or equal to a preset value, judging that the separation liquid is qualified, and entering the next process; and (3) mixing the qualified separation liquid with soluble carbonate, carrying out a second precipitation reaction to convert calcium ions in the separation liquid into precipitates, and then carrying out solid-liquid separation to obtain second separation residues and an impurity-removed lithium-containing liquid. The lithium-containing liquid is subjected to two-step impurity removal through the solid alkali and the soluble carbonate, the lithium loss rate is low, the impurity removal rate is high, the process is simple, operation is easy, and the cost is low.

The invention relates to scintillator glass melted in a high-concentration hydrogen atmosphere and a preparation method and application thereof. The preparation method comprises the following steps: preparing raw materials and mixing the raw materials; charging and melting in a high-concentration hydrogen atmosphere: charging the powder into a high-purity alumina crucible, then putting the crucible into a hearth of a high-concentration hydrogen atmosphere furnace, vacuumizing, introducing mixed gas into the high-concentration hydrogen atmosphere furnace, controlling the total flow of the mixed gas, and melting in the high-concentration hydrogen atmosphere furnace, when the pressure in the hearth is in a micro-positive pressure state, opening a one-way stop valve, controlling tail gas emission, starting an atmosphere furnace heating system, and heating, preserving heat and founding for a certain time; clarifying and homogenizing; molding by casting and annealing; and processing to obtain the scintillator glass. According to the invention, efficient formation and uniform dispersion of Ce < 3 + > are guaranteed through sufficient reduction, and finally, the scintillator glass reaches better levels in transmittance, light yield, decay time and irradiation resistance.

The general formula of the eutectic high-entropy alloy is NiaCobFecSidMe, M is a microelement, a is larger than or equal to 15%, b is larger than or equal to 15%, c is larger than or equal to 0% and smaller than or equal to 20%, d is larger than or equal to 15% and smaller than or equal to 25%, e is larger than or equal to 0%, a + b + c + d + e = 100%, and a, b, c, d and e are the molar percentages of the corresponding elements respectively. The eutectic high-entropy alloy is prepared by adopting a suspension induction melting method. The microstructure of the eutectic high-entropy alloy is in a special plate lamellar morphology and has a nanoscale eutectoid lamellar structure, and the microstructure of the eutectic high-entropy alloy is composed of a (Fe, Co and Ni) face-centered cubic FCC solid solution and a (Fe, Co and Ni) 31Si12 type intermetallic compound. The eutectic high-entropy alloy is small in interlamellar spacing and has excellent casting fluidity, the addition of the Si element is beneficial to reducing the overall density and manufacturing cost of the alloy, meanwhile, the oxidation resistance of the alloy is improved, and the eutectic high-entropy alloy has wide application prospects in the fields of aerospace, mechanical industry and the like.

This invention discloses a high-temperature resistant aluminum alloy wire suitable for arc-fused-wire additive manufacturing and its preparation method. The alloy wire comprises: manganese (Mn): 0.3-0.5%, copper (Cu): 5.3-5.8%, titanium (Ti): 0.15-0.35%, boron (B): 0.0005-0.006%, vanadium (V): 0.05-0.3%, zirconium (Zr): 0.05-0.2%, cadmium (Cd): 0-0.4%, silicon carbide (SiC): 0.1-0.4%, iron (Fe): ≤0.15%, silicon (Si): ≤0.06%, magnesium (Mg): ≤0.05%, zinc (Zn): ≤0.1%, other individual impurity elements: ≤0.05%, total other impurity elements: ≤0.15%, and the balance being aluminum (Al). The wire of this invention exhibits a uniform microstructure and moderate strength. The deposit formed by the arc-fused-wire additive manufacturing process possesses excellent strength, toughness, and other mechanical properties, with significantly improved heat resistance.

The invention belongs to the technical field of preparation of high-value chemicals by depolymerizing lignin, and provides a process and a catalyst for preparing aromatic hydrocarbon by hydrodeoxygenation of lignin. The process comprises the following steps: catalyzing and depolymerizing solid lignin into liquid bio-oil by adopting a non-supported NiMo catalyst with higher hydrogenation activity, and carrying out hydrogenation pretreatment on the depolymerized bio-oil under the action of the non-supported NiMo catalyst to improve the stability of the bio-oil, and finally, carrying out hydrodeoxygenation on the pretreated bio-oil by adopting a non-supported MoCuNi catalyst with relatively high selectivity to obtain aromatic hydrocarbon. The process for preparing the aromatic hydrocarbon from the lignin effectively solves the problems of poor stability, high viscosity, high oxygen content and the like of the lignin depolymerized bio-oil, and realizes efficient production of the aromatic hydrocarbon product by hydrodeoxygenation of the lignin. In addition, the adopted catalysts are all non-supported catalysts and have the characteristics of multiple active sites and high catalytic activity, and the preparation method of the catalyst is simple, environment-friendly and pollution-free, and meets the requirements of industrial preparation.

The application provides a method for removing impurity elements sulfur and oxygen in scrap steel electric furnace smelting, which comprises the following steps: electric furnace smelting under the protection of refining protective slag, wherein, during smelting, desulfurization is firstly performed, and then deoxidation is performed to obtain a product, the smelting temperature is 1673-1923K; the refining slag is selected from CaO-Al2O3-SiO2-MgO system slag, CaO in the refining slag is 58-65wt%, SiO2 is 8.5-11wt%, and CaO / SiO2 is 5.8-6.4. The application removes the impurity element sulfur in scrap steel through the designed refining slag, improves the purity of scrap steel through the combined use of special amount and special type of deoxidizer A and deoxidizer B, and provides guarantee for realizing the recycling of scrap steel; the impurity elements sulfur and oxygen in scrap steel are effectively removed, the requirements of producing high-quality steel with impurity elements are met, and the recycling of scrap steel resources is realized.

The invention discloses a Co-doped cerium oxide catalyst as well as a preparation method and application thereof. The Co-doped cerium oxide catalyst comprises CeO2 with oxygen vacancy defects and Co doped in the CeO2. The preparation method comprises the following steps: dissolving a Ce source and a Co source in a solvent, adding a NaOH solution while stirring, continuously stirring to obtain a suspension, carrying out heating reaction on the suspension at 98-102 DEG C, centrifuging to obtain a precipitate, washing and drying the precipitate to obtain a solid material, and calcining the solid material in a reducing atmosphere to obtain the Co-doped CeO2 catalyst. According to the Co-doped CeO2 catalyst prepared by the invention, PMS is activated under light driving to accelerate a redox reaction so as to degrade pollutants in a system, and the pollutants are ciprofloxacin, acetaminophen, sulfamethoxazole, methylene blue, rhodamine B or tetracycline. And the leakage rate of cobalt ions is far lower than the water pollutant emission concentration limit value and the unit product reference drainage limit value of the existing and newly built enterprises.

The invention discloses a catalyst for preparing 2, 6-diisopropylnaphthalene through naphthalene alkylation reaction as well as a preparation method and application of the catalyst, and belongs to the field of fine chemical engineering. The method comprises the following steps: carrying out heat treatment, filtration and primary roasting on an acid dispersion liquid of hydrogen-type mordenite to obtain acid-treated mordenite; and treating the zirconium sulfate dispersion liquid of the acid-treated mordenite at 60-90 DEG C for 2-8 hours, filtering, and carrying out secondary roasting to obtain the catalyst for preparing 2, 6-diisopropylnaphthalene through the naphthalene alkylation reaction. The obtained catalyst is suitable for alkylation reaction of naphthalene, isopropanol and propylene in a fixed bed reactor, the conversion rate, the yield and the selectivity of the reaction are remarkably improved, and meanwhile generation of carbon deposition is greatly inhibited. The method is simple in preparation process and low in catalyst cost, and has a wide industrial application prospect.

The invention relates to a ceramic green body and a ceramic tile which do not contain a binder and raw slime and a preparation method of the ceramic green body and the ceramic tile. The ceramic body without the binder and the raw slime is further prepared from the following components in parts by weight: 55 parts of superfine lithium tailings, 20 parts of zero-strength lithium tailings, 15 parts of yellow field sand and 10 parts of talc; corresponding chemical components are composed of the following components in percentage by weight: 4.07% of LOI, 25.50% of SiO2, 17.43% of Al2O3, 0.16% of Fe2O3, 0.06% of CaO, 2.57% of MgO, 0.03% of K2O, 0.04% of Na2O and 0.14% of Li2O. The preparation method comprises the following steps: (1) ball-milling and pulping; (2) performing multi-stage differentiation sieving, homogenizing and aging; (3) performing spray granulation to obtain powder; (4) compression molding; (5) performing surface decoration; (6) high-temperature firing is conducted, the highest firing temperature ranges from 1050 DEG C to 1110 DEG C, and the firing time ranges from 45 min to 60 min.

The invention discloses a preparation method of a perovskite material, a perovskite solar cell and a preparation method of the perovskite solar cell, and the method comprises the steps: determining a plurality of substances for synthesizing the perovskite material and the contents of the substances according to the component Cs0. 05FA0. 89MA0. 06Pb (I0. 94Br0. 06) 3 of the perovskite material; dissolving the plurality of substances by adopting an organic solvent to obtain a first solution; and obtaining the perovskite material from the first solution through an inverse temperature crystallization method. In this way, the high-purity mixed perovskite crystal can be obtained, a high-quality perovskite thin film can be formed, the grain size is increased, surface defects are reduced, aging of the precursor solution can be inhibited, and the shelf life of the precursor solution is greatly prolonged.

The present application relates to the technical field of solid polymer treatment, and particularly relates to a treatment method and a treatment system for volatile organic compounds in solid polymers, and a method for granulating solid polymers, which comprises: blowing a mixed gas containing gaseous light hydrocarbons and nitrogen through solid polymers containing volatile organic compounds to perform degassing. The treatment method is safe and efficient, can effectively reduce the content of volatile organic compounds in the solid polymers, and improves the environmental protection of solid polymer production and the quality of the solid polymers.

This invention belongs to the field of alloy forming technology and discloses a 2GPa-grade hydrogen embrittlement-resistant hot-formed steel containing NbVTiMo composite precipitates, its preparation method, and its applications. Through the synergistic proportioning of Nb, V, Ti, and Mo quaternary microalloys, a NbVTiMo composite nano-precipitate with high thermal stability and good interfacial bonding is formed. Compared with traditional single / low-element microalloy precipitates, this composite precipitate can act as a highly efficient hydrogen trap, significantly improving the hydrogen atom capture ability, effectively inhibiting hydrogen enrichment at grain boundaries and defects, improving the hydrogen embrittlement resistance of hot-formed steel, and reducing the risk of hydrogen-induced cracking and delayed fracture. Simultaneously, extending the coiling holding time promotes the full nucleation and dispersed distribution of the precipitates; shortening the austenitizing holding time avoids excessive dissolution and coarsening of the precipitates, maintaining the nanoscale of the precipitates, and achieving a fine and dense distribution of the precipitates, thus balancing hydrogen embrittlement resistance with the strength and toughness of the steel.

The invention relates to the technical field of extraction of lithium from brine, and discloses a method for preventing pollution and poisoning in the lithium extraction process of an aluminum adsorbent, lithium-containing brine containing high-sulfate, high-borate and high-concentration organic matters is used as a raw material, inorganic acid is used for adjusting the lithium-containing brine into a meta-acidic system, and then the lithium-containing brine is adsorbed to be saturated through the aluminum adsorbent; after leaching with a lithium salt-containing solution, desorbing the saturated adsorption column by using pure water, disinfecting the obtained desorbed effluent to obtain qualified liquid, and carrying out the steps of residual chlorine removal and the like to enter a subsequent production process. According to the method, the problems that the aluminum adsorbent is easily polluted by impurity ions in the brine, poisoned and blocked by floccules in the lithium extraction process can be solved, the performance of the aluminum adsorbent can be fully exerted, the process is continuous and stable, the efficiency is high, the cost is low, and the economic and environment-friendly benefits of the process of extracting the lithium from the brine are remarkably improved.

The application discloses a method for regulating dynamic recrystallization structure of austenitic stainless steel thick plate, which comprises the following steps: (1) diffusing annealing austenitic stainless steel thick slab at 1230-1260 DEG C to obtain homogenized slab; (2) after hot rolling of the homogenized slab, immediately performing large deformation hot rolling with single pass reduction of 25-50% to obtain rough rolling plate with surface temperature not lower than 1090 DEG C; if the thickness of the rough rolling plate reaches the required thickness, then water cooling to room temperature to obtain controlled hot rolling plate; otherwise, the next step is performed; (3) after rapidly cooling the rough rolling plate to below 920 DEG C, performing small deformation hot rolling with single pass reduction of 5-10%, total reduction is greater than or equal to 25%, and then water cooling to room temperature to obtain controlled hot rolling plate. The application adopts special 'high-temperature large reduction assisted low-temperature small reduction' process to regulate dynamic recrystallization behavior of the material to obtain uniformly distributed recrystallization grain structure, aiming at the problem that it is difficult to control the hot rolling structure of the austenitic stainless steel thick slab. The process has strong operability and can realize industrial application.

The present invention discloses a lithium replenishment winding machine, including a lithium replenishment mechanism for coating and replenishing lithium on a pole piece and a winding mechanism for winding the pole piece after lithium replenishment into a battery cell, and a material storage mechanism is also provided between the lithium replenishment mechanism and the winding mechanism, and the pole piece after lithium replenishment passes through the material storage mechanism and then is transferred to the winding mechanism for winding. The present invention organically combines the originally independent lithium replenishment mechanism and the winding mechanism by adding a material storage mechanism to form a complete lithium replenishment winding machine device integrating lithium replenishment and winding, so that the production line of lithium batteries is shortened, which not only saves the use and maintenance costs of the equipment, but also saves the use costs of space, and also reduces the danger caused by the excessively long transportation route of the pole piece after lithium replenishment.

The invention relates to a multiphase composite material, a preparation method thereof and application of the multiphase composite material in electrolyzed water. The multi-phase composite material comprises foamed nickel, and NiMoO4, Mo3Se4 and Ni3Se2 which are grown on the foamed nickel. In an alkaline medium, the composite material has excellent catalytic activity on HER, the overpotential in the HER process can be remarkably reduced, the water electrolysis hydrogen production efficiency is improved, meanwhile, the multi-phase composite material shows long-term stability under high current density, and industrial application is expected to be achieved.

The present invention discloses a flat hole array energy feeding structure for improving the microwave uniformity of a high-temperature furnace, comprising an energy feeding waveguide (1), an impedance matching structure (2), a large-size microwave energy feeding resonant cavity (3), a flat hole array structure (4), a microwave diffusion structure (5), a microwave action cavity (6), a high-temperature furnace structure (7), and a heated material (8). The present invention has a reasonable structural design, which allows microwave energy to be dispersed and evenly pass through a heat-insulating material, and can effectively improve the microwave field uniformity of the high-temperature furnace, solve the problem of heat-insulating material ablation, extend the service life of the heat-insulating material in the microwave field, improve the reliability of the long-term operation of the high-temperature furnace, and realize the industrial application of microwave high-temperature projects.

The invention relates to a double-heterostructure 2D perovskite solar cell applied to indoor photovoltaics and a preparation method thereof, the solar cell sequentially comprises an ITO substrate, a MeO-2PACz hole transport layer, a 2D perovskite double-heterostructure absorption layer, a PC61BM electron transport layer and an Ag electrode along the direction of incident light, and the 2D perovskite double-heterostructure is composed of DJ type and RP type perovskite. And the interface of the electron transport layer is also modified with a BCP layer. According to the preparation method disclosed by the invention, a layer of novel RP type 2D perovskite structure can be formed on the surface of the original DJ type 2D perovskite layer, so that the interface defects of the 2D perovskite are effectively reduced, and the photovoltaic performance of the 2D perovskite device under the indoor light condition is further improved.

The invention discloses a method for preparing iron phosphate dihydrate of nanoparticles, which comprises the following steps of: diluting an iron phosphate complex solution by using water, reducing the concentration to 10% or lower of the original concentration, and carrying out solid-liquid separation to obtain the iron phosphate dihydrate nanoparticles. Nanoscale irregular iron phosphate dihydrate particles obtained by the preparation method provided by the invention are further subjected to high-temperature dehydration to form iron phosphate nanoparticles with crystal configuration. According to the method disclosed by the invention, the crystal aging process in the existing iron phosphate dihydrate preparation process is reduced, and the energy consumption is greatly reduced. Besides, nano-particle iron phosphate is mixed with large-particle-size iron phosphate particles, so that gaps among the particles can be reduced in a high compaction process, and the preparation of high-compaction lithium iron phosphate is realized. The preparation method disclosed by the invention is simple and controllable in reaction condition and can realize industrial application.