57results about How to "Efficient reduction" patented technology

The invention relates to an offshore photovoltaic module comprehensive performance test system, and aims to solve the problem that a traditional photovoltaic test system cannot accurately simulate an offshore complex environment, and the system comprises a test cavity which is provided with an air inlet; a photovoltaic support and a photovoltaic module arranged on the photovoltaic support; a sunlight simulation lamp; the photovoltaic module tester is electrically connected with the photovoltaic module; the refrigerating / heating module is used for inputting hot / cold air into the air inlet; the salt mist / acid mist / alkali mist nozzle module is arranged at the top of the test cavity; the salt liquid / acid liquid / alkali liquid configuration module is connected with the salt mist / acid mist / alkali mist nozzle module through a liquid conveying pipeline and exchanges heat with an air outlet of the refrigerating / heating module; a fan can be arranged at the air inlet, and a sun shield capable of adjusting the sun-shading coverage area is arranged on the photovoltaic support. Compared with the prior art, the device and the method have the advantages that complex environmental factors such as illumination, temperature, corrosion and shadow shielding on the sea can be comprehensively and accurately simulated, and an effective means is provided for performance test and evaluation of the photovoltaic module on the sea.

The invention relates to the technical field of enzyme engineering, in particular to a glucose dehydrogenase mutant and application thereof. The invention discloses a glucose dehydrogenase mutant. The glucose dehydrogenase mutant is selected from mutation of at least one amino acid of the 20th site, the 132th site, the 135th site, the 176th site and the 182th site of an amino acid sequence shown in SEQ ID NO.1. The invention further discloses a preparation method of the glucose dehydrogenase mutant. Compared with a conventional wild type glucose dehydrogenase mutant, the glucose dehydrogenase mutant provided by the invention has higher reductase activity on NMN, the enzyme activity of the glucose dehydrogenase mutant can reach 1220 times of that of the wild type, and the glucose dehydrogenase mutant can efficiently reduce NMN into NMNH; the glucose dehydrogenase mutant can be mechanically applied for more than 20 times after being immobilized, 800 mM of NMN can be completely transformed within 1 hour, and 1.2 M of NMN can be completely transformed within 1.5 hours.

The invention relates to the field of metallurgy, and provides an efficient titanium slag smelting method which comprises the following steps: controlling the total charging quantity of titanium concentrate in a single furnace according to the effective volume and rated power supply power of an electric furnace, blanking according to a fixed feeding speed, and calculating the total charging quantity of a reducing agent in the single furnace based on the total charging quantity of the titanium concentrate in the single furnace, blanking is carried out according to the feeding speed from high to low; the titanium concentrate and a reducing agent are conveyed into a smelting furnace to be subjected to continuous micro-negative-pressure smelting, first-time deslagging operation is carried out, a first part of titanium slag is obtained, and electrification is maintained; and when the total iron content of the first part of titanium slag is reduced to an expected value, electrifying is stopped, secondary slag tapping and iron tapping operation are carried out, and a second part of titanium slag and low-carbon molten iron are obtained. According to the method, on the premise that the unit furnace burden reducing agent adding amount and the unit power supply power are not changed, the furnace feeding system and the corresponding power supply power of the reducing agent are adjusted, so that the high-and-low carbon adding system and the low-and-low power supply system are formed, and the smelting efficiency in the titanium slag smelting process is effectively improved.

The invention discloses a method for realizing precise green restoration of environmental heavy metal pollutants by coupling a heavy metal sensing module and an aerobic sulfate reduction module. The method comprises the following steps: constructing an aerobic sulfate reduction pathway by heterologous reconstruction of cysteine feedback inhibition-resistant serine acetyltransferase and cysteine desulfylase, putting the aerobic sulfate reduction pathway under the control of a sensing module composed of heavy metal sensing protein genes, so as to construct a'sensing integration 'module, and transferring the'sensing integration' module into environmental microorganisms. The heavy metal in-situ remediation engineering strain is formed. When a specific heavy metal sensing module in the engineering strain recognizes heavy metal pollution, expression of an aerobic sulfate reduction module can be effectively started, so that heavy metal ions are converted into stable metal sulfide, and in-situ green low-carbon remediation of environmental heavy metal pollutants is realized. The genetic method disclosed by the invention is simple and efficient, saves the cost, can realize accurate perception and accurate control of environmental heavy metal pollution, and has important environmental protection application value.

The present invention discloses a nitrogen-doped porous graphene and a preparation method and application thereof. The preparation method comprises the following steps: uniformly dispersing graphene oxide aerogel, a nitrogen-containing precursor and an activator in deionized water, followed by drying and high-temperature calcination to obtain nitrogen-doped porous graphene; wherein the nitrogen-containing precursor is selected from at least one of urea, melamine and ammonium hydroxide; and the activator is selected from at least one of KFeO4 and KOH. The present invention uses KOH and KFeO4 as activators, and urea, melamine and ammonium hydroxide as nitrogen sources to simply and efficiently prepare nitrogen-doped porous graphene. The obtained nitrogen-doped porous graphene has a large specific surface area, developed pores and a high nitrogen content. When applied to the catalytic reduction of aromatic nitro compounds, its catalytic activity is far superior to the catalysts reported in the literature, including metal catalysts and carbon-based metal-free catalysts. It can efficiently reduce aromatic nitro compounds in aqueous solution under mild conditions, and also has the advantages of low cost and environmental friendliness.

The invention discloses a method for improving metallization rate and dezincification rate of solid waste based on cascade distribution of coke oven gas, which comprises the following steps: mixing a binder and iron-containing and zinc-containing solid waste according to a ratio, and feeding the mixture into a powerful mixer to form a mixture; the mixture enters a ball press machine to obtain green balls containing zinc and iron, and the green balls enter a rotary hearth furnace after being preheated, dried and screened; the green pellets sequentially pass through a heating area, a first reduction area, a second reduction area, a third reduction area, a fourth reduction area and a fifth reduction area which are sequentially arranged in the rotary hearth furnace in the trolley direction to form metallized pellets; and discharging the metallized pellets to a cylindrical cooling machine through a spiral discharging machine, and introducing nitrogen into the cylindrical cooling machine to obtain a final product. The method has the advantage that the metallization ratio of the carbon-containing pellets of the rotary hearth furnace is increased on the premise that the dezincification rate of the zinc-containing and iron-containing solid waste is guaranteed.

The invention relates to the technical field of photocatalytic processes, in particular to a catalyst for preparing methanol through photocatalytic reduction of CO2 as well as a preparation method and application of the catalyst. The catalyst comprises a composite carrier and active sites dispersed on the surface or in pores of the composite carrier, the composite carrier is of a heterojunction composite structure formed by a hollow TiO2 sphere and MCN, the hollow TiO2 sphere comprises a shell layer and a spherical cavity structure located in the shell layer, the shell layer is formed by TiO2 nanoparticles, and the MCN has a mesoporous pore structure; a II-type or Z-type heterojunction interface is formed between the hollow TiO2 spheres and the MCN through physical contact and chemical action; the active sites comprise copper nano species, sulfur vacancy defects and amino groups; the copper nano species are copper nano particles or clusters, and the valence state of copper is 0 and / or + 1 valence amino is grafted on the surface of the composite carrier through an organic long chain. The catalyst provided by the invention can greatly improve the yield and selectivity of methanol prepared by photocatalytic reduction of carbon dioxide.

The invention discloses a platinum-rhodium alloy loaded titanium dioxide catalyst as well as a preparation method and application thereof, and relates to the technical field of catalysis. The preparation method comprises the following steps: 1, preparing a precursor solution of Pt and a precursor solution of Rh; 2, mixing the Pt precursor solution and the Rh precursor solution, adding TiO2 into the Pt precursor solution and the Rh precursor solution, and carrying out solvothermal reaction to obtain a sample; and 3, washing the obtained sample, and carrying out vacuum drying. The TiO2-loaded platinum-rhodium alloy catalyst prepared by the invention can be used for efficiently carrying out photo-reduction on CO into C2H4, and the yield within 3 hours is up to 362.94 mu mol gcat <-1 >; the catalyst prepared by the invention has high activity and high selectivity which exceed most of currently reported CO photocatalytic reduction performance, and especially can produce C2H4, and the selectivity of C2H4 is close to 50%.

The invention relates to the field of microorganisms, in particular to a South China Sea-sourced psychrophilus sp. CM16 strain and application of the South China Sea-sourced psychrophilus sp. CM16 strain in reduction of hexavalent chromium into trivalent chromium. The psychrophage disclosed by the invention is classified and named as (Algoxiphagussp), CM16 and preserved in the China Center for Type Culture Collection (CCTCC) on October 23, 2024, the address is Wuhan University, Wuhan, Hubei, China, and the preservation number is CCTCC NO: M 20242309. The invention mainly protects the psychrophilus and a microbial inoculum containing the psychrophilus. The marine-derived psychrophage has the beneficial effects that the marine-derived psychrophage is provided, hexavalent chromium is efficiently converted into non-toxic trivalent chromium under a specific culture condition, so that the toxicity of the marine-derived psychrophage in the environment is remarkably reduced, and the marine-derived psychrophage shows strong adaptive capacity and still has excellent reducing capacity on hexavalent chromium under low-temperature and high-salt conditions.

The invention belongs to the technical field of noble metal catalyst preparation, and relates to a preparation method of high-purity potassium chloroplatinite. According to the invention, potassium nitrite is used as a protective medium of platinum (IV) ions and is compounded with a reducing agent, the reducing agent with stronger reducing capacity participates in reduction of platinum (IV) ions firstly, even if the reducing agent is excessive, nitrite can be preferentially combined with the reduced platinum (IV) ions to generate Pt (NO2) 4 < 2-> as the nitrite has stronger coordination capacity on the platinum (IV) ions, so that the platinum (IV) ions can be converted into platinum (IV) 4 < 2->, and the platinum (IV) 4 < 2-> can be converted into platinum (IV) 4 < 2->. The PtCl4 < 2-> is converted into PtCl4 < 2-> under an acidic condition, so that introduction of impurities and excessive reduction of platinum are avoided; the potassium chloroplatinite is prepared by adding a saturated potassium chloride solution and concentrating and crystallizing. The method improves the purity and yield of potassium chloroplatinite, does not use toxic and harmful substances, and is simple and convenient to operate.

The invention discloses a cerium-based photosensitizer, a preparation method and application of the cerium-based photosensitizer in photocatalytic reaction, and relates to the technical field of coordination chemistry and photocatalysis. The general formula of the cerium-based photosensitizer is Ce (L1) 3 (L2) m, and L1 comprises a strong field anion ligand of at least one strong electron withdrawing group or a strong field anion ligand of a rigid structure; l2 is a neutral nitrogen-containing heterocyclic ligand, and m is 0 or 1. According to the invention, strong visible light absorption and long excited state life can be achieved by introducing L1, and the Ce < + > / Ce < 4 + > oxidation potential can be reduced to a mild range, so that the Ce < 4 + > intermediate can be efficiently reduced by a mild reducing agent generated in the reaction, and simple catalytic circulation without an external reinforced reducing agent is realized. When being applied to boronation reaction of various alkenyl / aryl / heteroaryl halides and various organic boron reagents, the photosensitizer shows high catalytic activity (the yield is as high as 91%), the performance is superior to that of a noble metal photosensitizer, but the cost is remarkably reduced, and the photosensitizer is environment-friendly.

The invention discloses a mine laneway support digital processing method, system and platform based on 3Dmine. The method comprises the following steps: generating and acquiring first data corresponding to mine laneway and to-be-supported digital processing; respectively creating a first model and a second model corresponding to the first data according to the first data in combination with 3Dmine; based on the first model and the second model, generating second data corresponding to the mine laneway support, and according to the second data, constructing a third model corresponding to the mine laneway support; the third model is a supported roadway design model; generating corresponding third data based on the third model; according to the method, the system and the platform corresponding to the method, fine, efficient and digital management of the whole process of the laneway support engineering is promoted, the production organization efficiency of mine enterprises is improved, and the safety management capacity of various underground laneway engineering and the construction quality management and control capacity of the support engineering are improved.

The present invention relates a mechanical structure (also known as mounting structure) for installing cover plates of the pasta machine, a method for installing cover plates of the pasta making machine, and a pasta machine with brackets and cover plates.

The present invention provides a lead-zinc-copper refining device, comprising: a bed layer part, comprising a material cup, a furnace body and a furnace belly arranged in sequence from top to bottom, the material cup is fixedly installed at one end of the furnace body away from the molten pool part, the furnace body is connected with the furnace belly, the furnace body is fixedly installed with a smoke exhaust port, and the furnace belly is fixedly installed with a first air supply port; a molten pool part is connected with one end of the furnace belly away from the furnace body, the molten pool part includes a reduction zone and a clarification zone along the length extension direction, the reduction zone is located at one end of the molten pool part close to the bed layer part, the clarification zone is fixedly installed with a slag discharge port and a siphon port in sequence from top to bottom, and the reduction zone is fixedly installed with a spray gun. The present invention can coordinately process solid and liquid lead-zinc-copper oxide materials in an integrated and efficient manner, with remarkable effects, and is worthy of promotion.

The invention relates to the technical field of photocatalysts, in particular to a nonmetal plasmon heterojunction material, a preparation method and application thereof and a method for preparing p-aminophenol through reduction of p-nitrophenol. The nonmetal plasmon heterojunction material provided by the invention comprises a C3N4 nanosheet and a WO3-x nanoplate (x is 0.1 to 0.3) positioned on the surface of the C3N4 nanosheet. The WO3-x local surface plasmon characteristic can effectively expand the spectral response range of the non-metal plasmon heterojunction material in a visible region to a near-infrared region, and the light absorption efficiency of the non-metal plasmon heterojunction material is remarkably enhanced. The nonmetal plasmon heterojunction material provided by the invention can realize efficient reduction of p-nitrophenol based on the synergistic effect of an interface heterojunction, a built-in electric field and oxygen vacancies, is high in selectivity, has excellent photocatalytic activity for reduction of p-nitrophenol, and is excellent in photocatalytic activity stability.

The invention discloses a cyclodextrin bionic organic iridium magnetic catalyst as well as a preparation method and application thereof, and belongs to the field of catalysts and application. The catalyst is prepared from three parts, namely magnetic nanoparticles, beta-cyclodextrin and an adamantane functionalized 2-pyridine benzamide type organic iridium catalyst, the magnetic nanoparticles are surface carboxylated magnetic nanoparticles, are activated by N-hydroxysuccinimide and then are connected with aminated beta-cyclodextrin through amido bonds; the beta-cyclodextrin is connected with adamantane in the adamantane functionalized 2-pyridine benzamide type organic iridium catalyst structure through a host-guest coupling effect. The invention further discloses application of the combination of the catalyst and a rhodamine 110 type quinone reduction regulation fluorescent probe in coenzyme NADH (Nicotinamide Adenine Dinucleotide Hormone) detection. The cyclodextrin bionic organic iridium magnetic catalyst MBs (at) CD (at) Ir prepared by the invention has excellent biocompatibility, and the constructed NADH fluorescent probe has the advantages of high sensitivity, good selectivity and easiness in recovery of the catalyst.

The invention relates to the technical field of metal preparation. The invention provides a preparation method of metal copper. The preparation method comprises the following steps: S1, preparing a copper oxide thin film; s2, preparing a metal aluminum film on the surface of at least one side of the copper oxide thin film; and S3, the thin film containing the copper oxide thin film and the metal aluminum film is placed in an alkaline solution to be soaked, and metal copper is obtained. The method can be used for preparing the metal copper at room temperature, and is simple and convenient.

The invention discloses a simulation static scene construction method and device, terminal equipment and a storage medium, and the method comprises the steps: obtaining each frame of playback data collected in a drive test process, and taking the Gaussian coordinate of a vehicle in the first frame of playback data as a coordinate origin for constructing a simulation static scene; rendering the road network data in the 2D base map and the high-precision map in the road test process into the simulation static scene; and after target information of each static target in each frame of playback data is converted to a Gaussian coordinate system, each static target is rendered to a simulation static scene, and construction and output of the simulation static scene are completed. The method is applied to the field of scene simulation, the high-precision map and the static target in the road test process are rendered into the simulation static scene, the environment condition of the unmanned vehicle in the road test process can be restored more accurately and efficiently, the generated simulation static scene can be used for testing, and the test efficiency is improved. And the algorithm test cost of unmanned driving is greatly reduced.

The invention provides a bismuth-based core-shell structure catalyst and a preparation method and application thereof, and belongs to the technical field of electric energy catalytic conversion. The bismuth-based core-shell structure catalyst comprises Bi nanoparticles and a shell layer coating the Bi nanoparticles, the shell layer is of a mesoporous structure, and the material of the shell layer comprises a nitrogen-doped carbon material. According to the technical scheme, the bismuth-based core-shell structure catalyst is provided, the catalyst takes Bi nanoparticles as a core and a nitrogen-doped carbon material with a mesoporous structure as a shell, highly concentrated and small-size pore size distribution is shown, the adsorption performance on carbon dioxide is improved based on the space confinement effect, and the catalyst not only has relatively high catalytic activity, but also has a good application prospect. And the catalyst has extremely high formic acid production selectivity, can realize efficient electro-catalysis of reduction of carbon dioxide to produce formic acid, also has good stability, and shows good application prospects.

The invention discloses a fusion protein, high-density lipoprotein containing the fusion protein, a bionic nano-drug and preparation and application of the fusion protein and the high-density lipoprotein and the bionic nano-drug. The fusion protein comprises alpha-helix amphiphilic polypeptide and neuronal targeting peptide, and the high-density lipoprotein containing the fusion protein is used as a bionic nano-carrier; brain-targeted delivery of drugs can be achieved through intravenous administration, compared with brain in-situ administration, manpower, material resources and financial resources are saved, and meanwhile the compliance of patients is remarkably improved.

The invention discloses preparation of a heterojunction photocatalyst and application of the heterojunction photocatalyst in treatment of uranium-containing wastewater. The preparation comprises the following steps: step 1, preparing polystyrene nanospheres; step 2, preparing PS-TiO2 (Polystyrene); and 3, adding PS-TiO2 prepared in the step 2 into ethanol, carrying out ultrasonic dispersion, adding a carbon quantum dot solution, carrying out a stirring reaction at a certain temperature for a certain time, carrying out centrifugation, washing with ethanol and deionized water to obtain a faint yellow product, and drying the faint yellow product to obtain the heterojunction photocatalyst. The heterojunction photocatalyst PS-TiO2-coated CQDs is synthesized by taking a support type material polystyrene nanosphere as a substrate, coating the surface of the substrate with a photocatalyst TiO2 and introducing carbon quantum dots to construct an S-type heterojunction coupling in-situ surface active site modification strategy, and the heterojunction photocatalyst PS-TiO2-coated CQDs shows extremely high photocatalytic activity and special selectivity to uranium, and can be applied to the field of uranium treatment. The PS-TiO2-coated CQDs show excellent ion interference resistance, chemical stability and cycle performance in a uranium-containing solution, and the photocatalytic removal rate of the PS-TiO2-coated CQDs to U (VI) is greater than 99%.

The application relates to the technical field of photocatalysis and heavy metal treatment, and particularly discloses a method for photocatalytic reduction of hexavalent chromium, which comprises the following steps: mixing a photocatalyst with a hexavalent chromium solution, adjusting the pH value to 1-7, stirring, and irradiating; wherein the photocatalyst is a bismuth molybdate nanoring; the method uses the novel bismuth molybdate nanoring as the photocatalyst to efficiently reduce the hexavalent chromium for the first time, the reaction rate is fast, the photocatalyst can be recycled, the method is green and environment-friendly, and the cost is low.

The invention relates to a formate dehydrogenase mutant and application thereof, and belongs to the field of enzyme engineering and carbon dioxide reduction. The invention provides a formate dehydrogenase mutant. The formate dehydrogenase mutant comprises a formate dehydrogenase catalytic subunit FdhA, an electron transport subunit FdhB and a membrane anchoring protein subunit FdhC, compared with formate dehydrogenase, the formate dehydrogenase mutant has the advantages that a membrane anchor protein subunit FdhC is deleted, or the membrane anchor protein subunit FdhC and an electron transport subunit FdhB are deleted. Compared with the existing formate dehydrogenase, the formate dehydrogenase mutant provided by the invention has high activity and can tolerate oxygen at the same time. The formate dehydrogenase mutant provided by the invention shows huge potential value in the carbon dioxide immobilization industry.

This invention discloses a method and apparatus for constructing a microdroplet self-Fenton system. The construction method includes the following steps: mixing an iron salt with an acidic solution, and subjecting the resulting mixed solution to ultrasonic atomization to form micron-sized droplets, thereby obtaining the microdroplet self-Fenton system. The construction apparatus includes an atomizing reactor for storing the mixed solution and an ultrasonic generator for providing ultrasonic waves. The microdroplet self-Fenton system constructed by this invention has the following advantages: good adaptability, enabling the acquisition of a self-Fenton system under conditions of no light, no catalyst, and no sacrificial agent; it helps to increase the generation rate and yield of ·OH in the system, giving the system stronger redox capabilities and enabling efficient degradation of organic pollutants, providing important guidance for promoting the effective treatment of organic pollutant wastewater; the process is simple, easy to operate, low in cost, environmentally friendly, suitable for industrial applications, and facilitates the effective treatment of organic pollutant wastewater.

This invention provides an in vitro simulated blood vessel device and an embolic agent performance evaluation device. The in vitro simulated blood vessel device includes an interventional device port, a basic vascular access, a biomimetic arterial module, a pressure measuring module, a first resistance valve, a pump tank, a pulse pump, and a flow meter, all connected sequentially via tubing. The pressure measuring module enables real-time monitoring of the fluid pressure in the tubing, thereby monitoring the stability of the embolization. The transparent biomimetic blood vessel tubing highly replicates the vascular structure, providing a realistic vascular simulation environment and facilitating long-term observation of the embolic agent's status and the patency of the embolic area. This device can be widely used for in vitro performance testing and evaluation of embolic agents and other implantable medical devices.

The invention discloses a cyclodextrin bionic organic iridium magnetic catalyst and its preparation method and application, belonging to the field of catalysts and applications. The catalyst comprises three parts: magnetic nanoparticles, β-cyclodextrin and adamantane-functionalized 2-pyridine benzamide-type organic iridium catalyst; the magnetic nanoparticles are surface carboxylated magnetic nanoparticles, which are connected to the amino β-cyclodextrin through an amide bond after being activated by N-hydroxysuccinimide; the β-cyclodextrin is connected to the adamantane in the structure of the adamantane-functionalized 2-pyridine benzamide-type organic iridium catalyst through a host-guest coupling effect. It also includes the application of the catalyst combined with a rhodamine 110-type quinone reduction-regulated fluorescent probe in the detection of coenzyme NADH. The cyclodextrin bionic organic iridium magnetic catalyst MBs@CD@Ir prepared by the present invention has excellent biocompatibility, and the constructed NADH fluorescent probe has the advantages of high sensitivity, good selectivity and easy recovery of the catalyst.

The invention provides a preparation method and application of a ternary rare earth metal alloy particle (at) porphyrin COF mimic enzyme. The preparation method comprises the following steps: suspending porphyrin COF in an ethanol solution containing ternary rare earth metal ions M13 < + >, M23 < 3 + > and M33 < 3 + >, and carrying out a stirring reaction in an N2 atmosphere; after stirring is completed, suction filtration and ethanol washing are conducted, and porphyrin COF solids adsorbed with ternary rare earth metal ions are obtained. And suspending in absolute ethyl alcohol, dropwise adding a NaBH4 ethanol solution while stirring, carrying out stirring reaction in a dark place, centrifuging the suspension, washing with ethanol and deionized water, and carrying out vacuum drying to obtain the mimic enzyme. The invention also provides application of the mimic enzyme in visible light driven CO2 reduction preparation of ethylene. The method adopts room-temperature reaction, takes visible light as an energy source and water as a solvent and a hydrogen source, is green and environment-friendly, high in reduction product generation efficiency and high in ethylene selectivity, and is a green, efficient and practical method for preparing ethylene through CO2 reduction.

The invention discloses a regeneration method for lithium battery waste, belongs to the technical field of waste battery regeneration, and mainly relates to a hydrogen reduction roasting method for lithium battery waste, including three-stage reduction roasting; the temperature of the first stage reduction roasting is 450±20℃, the hydrogen flow rate is 10‑15m 3 / h tons of material, the reduction roasting time is 10-20min, the second stage reduction roasting temperature is 530±40℃, and the hydrogen flow rate is 20-30m 3 / h tons of material, the reduction roasting time is 10-40min, the temperature of the third stage reduction roasting is 620±30℃, and the hydrogen flow rate is 25-30m 3 / h tons of material, and the reduction roasting time is 10-30min. After the roasting product is leached, the leachate is further treated to remove impurities and precipitate lithium to prepare a lithium salt product, and the leached residue is subsequently treated to separate and recover nickel and / or cobalt and manganese. The method of the present invention can achieve simple and efficient separation of valuable elements in lithium battery waste.

The invention discloses an actinide iron hoop body thin film material as well as a preparation method and application thereof, and belongs to the technical field of iron materials. The actinide iron ring body thin film material is a crystal thin film prepared by a spin coating method, and chemical components of the actinide iron ring body thin film material comprise cyclodextrin, actinide ions and alkali metal ions. Firstly, the actinide cyclodextrin crystal thin film is prepared on a substrate through a spin-coating method, and the thin film is good in compactness and controllable in thickness; and high-efficiency controllable reduction of the crystal film is realized through two ways of irradiation reduction or LED photoreduction, so that the iron ring body film is obtained. The actinide iron hoop body thin film material has the basic properties of iron hoop bodies, and lays an important foundation for development of iron hoop body devices.

The present invention relates to a quaternary ammonium xylan coating mercury ion detection paper-based chip and its preparation method and application. The preparation method comprises: quaternary ammonium xylan is modified to obtain quaternary ammonium xylan, and gold nanoparticles are prepared using the quaternary ammonium xylan as a reducing agent, and then Raman beacon molecules are added to the system to obtain a quaternary ammonium xylan / gold nanoparticle / Raman beacon molecule composite coating material; the composite coating material is applied to the surface of paper, and then immersed in a silver ion solution to utilize the reducing property of the quaternary ammonium xylan to in-situ reduce the silver ions to silver nanoparticles deposited on the coating surface, thereby obtaining a quaternary ammonium xylan coating mercury ion detection paper-based chip. The present invention utilizes the chloride ions loaded by the quaternary ammonium group on the quaternary ammonium xylan to react specifically with mercury ions, and proportionally interfere with the Raman signal, thereby achieving the effect of high sensitivity and quantitative detection of mercury ions, and also has the advantages of mild preparation conditions and environmentally friendly preparation raw materials.