141 results about "Iron nanoparticle" patented technology

The invention discloses a synthesis method and application of an iron-aluminum co-doped catalyst, and the synthesis method is characterized by comprising the following steps: S1, dissolving an aluminum metal salt and an iron metal salt in a beaker containing deionized water to obtain a solution A; s2, adding a phosphorus source into the solution A, and adjusting the pH to form a turbid liquid B; s3, biomass is added into the turbid liquid B to be stirred for 30 min, and a solution C is obtained; s4, adding a nitrogen source into the solution C, and drying the beaker in a water bath kettle; mixing the obtained dried product with an activating agent, and calcining under inert gas to obtain a catalyst crude product; and S5, grinding the catalyst crude product, washing with ethanol and deionized water, and carrying out vacuum drying to obtain the iron-aluminum co-doped catalyst. The preparation method is simple and low in equipment requirement. The invention discloses a novel nitrogen-doped carbon-coated zero-valent iron nanoparticle catalyst which can degrade pollutants by utilizing electron transfer of the pollutants and the catalyst under the condition of adding any oxidizing agent. Under the neutral room temperature condition, the catalyst has a very good removal effect on degradation of organic pollutants which are difficult to biodegrade, has very good stability, and is low in iron ion dissolution rate.

The invention discloses an ultra-stable anti-bioadhesion coating as well as a preparation method and application thereof, and belongs to the technical field of functional materials. The coating provided by the invention comprises a component A and a component B, the component A comprises nanoparticles, carboxyl silicone oil, a silane coupling agent and a solvent; the component B comprises a base material and a solvent; the nano-particles comprise at least one of silicon nano-particles, iron nano-particles or zinc nano-particles; the base material comprises epoxy resin. Through cooperation of the component A and the component B, the carboxyl silicone oil and the functionalized nanoparticles are combined and embedded into a matrix material, the formed coating can be used for preparing an ultra-stable anti-bioadhesion coating, the stability is good, the durability is good, adhesion of blood components, protein, bacteria, cells and the like can be effectively reduced, and the anti-bioadhesion performance of the coating is improved. The coating and the coating prepared from the coating have good application prospects in implantable medical equipment.

The invention provides a chitosan-iron nanoparticle leaf surface resistance and control agent as well as a preparation method and application thereof, and belongs to the technical field of reduction of heavy metal pollution of crops. The preparation method comprises the following steps: dissolving chitosan in an organic solvent to obtain a chitosan solution, mixing the chitosan solution with ferrous sulfate, adding a sodium tripolyphosphate solution for crosslinking and stirring to obtain a solution containing precipitates, centrifuging, and collecting the precipitates to obtain the chitosan / ferrous sulfate composite material. The TPP and amino groups of the chitosan form ionic crosslinking through triphosphate groups, and Fe < 2 + > is successfully loaded on the surfaces of the chitosan nanoparticles. By complexing chitosan and Fe < 2 + >, the crystallinity of the material is reduced, and the adsorption activity of the amorphous structure is enhanced. Pot experiments show that by spraying the chitosan-iron nanoparticle leaf surface resistance and control agent on leaf surfaces, heavy metals of crops can be remarkably reduced, the antioxidant enzyme activity of plant tissues is improved, active oxygen is effectively removed, oxidative damage is relieved, and therefore plant growth is promoted, and the toxic effect of heavy metal stress on the crops is relieved.

A nanocomposite material including iron sulfide (FeS2) nanoparticles, iron oxide (α-Fe2O3) nanoparticles, titanium dioxide (TiO2) nanoparticles, and graphitic carbon nitride (C3N4) nanosheets and a method of its preparation. The nanocomposite is used in a method of forming oxygen gas from water using an applied voltage and photoirradiation, a method of forming hydrogen gas from water using an applied voltage and photoirradiation, and a method of photodegrading organic pollutants using visible light photoirradiation.

The invention discloses iron oxide nanoparticles capable of responding to particle size change in a tumor microenvironment and a preparation method of the iron oxide nanoparticles, and belongs to the technical field of biomedical nano materials. The nano-particle comprises an iron oxide nano-crystal core with the particle size of 3-5nm and a tumor microenvironment response layer coating the surface of the iron oxide nano-crystal core. The response layer contains groups, such as disulfide bonds, enzyme digestion peptide fragments and the like, which can respond to acidic pH, high-concentration reduced glutathione or matrix metalloproteinase and other tumor characteristic stimuli to generate structural changes. In a tumor microenvironment, the hydration particle size of the nanoparticles can be directionally and controllably converted from 3-20 nm to 20-100 nm (or reversely). The preparation method mainly comprises two steps of preparing the core by a thermal decomposition method and modifying the surface response layer. The technical problems of insufficient tumor targeted enrichment capacity, limited imaging contrast and difficulty in balancing permeation and retention caused by fixed particle size of the existing iron oxide nanoparticles are solved, and the accuracy and efficiency of tumor diagnosis and treatment can be remarkably improved.

Provided is an efficient combined nano iron suspension fertilizer. The suspension fertilizer efficient combined nano iron is prepared from ingredients including, in mass percentage: 10.0% to 20.0% of FeSO4; 0.5% to 2.0% of zero-valent iron nanoparticles (nZVI); 5.0% to 10.0% of magnetic iron oxide nanoparticles (Fe3O4-NPs); 30.0% to 50.0% of citric acid; 1.0% to 5.0% of a dispersant 5040; 0.2% to 1.0% of xanthan gum; 1.0% to 5.0% of magnesium aluminum silicate; and water as a balance.

The invention discloses a preparation method and application of an iron carbide nanoparticle modified carbon-based Fe monatomic catalyst, in the preparation process, Fe < 3 + > is complexed with oxalic acid in advance to realize coordination self-assembly and effectively inhibit hydrolysis of Fe < 3 + >, and glucose is used as a carbon-based carrier precursor and a reducing agent to prepare a carbon-based Fe monatomic catalyst. According to the preparation method, the self-assembled iron species are converted into Fe3C nanoparticles at a high temperature, melamine and cyanuric acid are used as N sources to realize N-doped carbon and anchor part of the iron species to form Fe monatomic atoms, and in addition, oxalic acid, melamine and cyanuric acid are easy to decompose at the high temperature to generate small-molecule gas, so that glucose forms a porous carbon structure during high-temperature carbonization, and the porous carbon structure is formed. Finally, Fe3C and Fe monatomic synergistic coexistence hierarchical porous N-doped composite carbon-based catalyst is achieved, the obtained catalyst can efficiently activate peracetic acid and degrade phenol organic pollutants, and the catalyst is simple in preparation process, good in catalytic effect and high in stability and has wide application potential.

The invention discloses an ultra-small iron carbide nano-particle and a preparation method and application thereof, the particle size of the ultra-small iron carbide nano-particle is smaller than 10 nm, and the phase composition of the ultra-small iron carbide nano-particle comprises Fe3C, Fe5C2, Fe2C and the like; according to the preparation method, mesoporous silica is taken as a template, organic and inorganic double iron sources are adopted, and the iron carbide nanoparticles which are small in size and uniform in particle size distribution and can be stably dispersed in water for more than 2 months are prepared through the steps of hydrothermal reaction, high-temperature calcination, etching and the like; the ultra-small iron carbide nano-particles obtained by the invention have good activity of various nano-enzymes due to the brand-new image structure and ultra-small size of the nano-particles, and have good T1-magnetic resonance imaging performance.

The invention relates to a preparation method of a multifunctional nano growth-promoting bacterium for overcoming successive cropping obstacles, which comprises the following steps: converting bacillus subtilis into bacillus subtilis spores under the condition of heating or inoculating bacillus subtilis into a sporulation culture medium containing manganese sulfate, preparing iron nanoparticles by using a chemical reducing agent and a coprecipitation method under the protection of inert gas, and carrying out vacuum drying on the iron nanoparticles to obtain the multifunctional nano growth-promoting bacterium for overcoming successive cropping obstacles. The preparation method is simple, the cost is low, the production process is green and environment-friendly and suitable for large-scale production, the prepared nano growth-promoting bacteria can integrate the biological functions of the iron nanoparticles and the bacillus subtilis, the soil fertility is improved, trace elements are supplemented, and meanwhile the biological functions of the iron nanoparticles and the bacillus subtilis are improved. The fertilizer promotes proliferation of beneficial bacteria, inhibits proliferation of harmful bacteria, improves the utilization rate of nutrients, degrades harmful substances, improves stress resistance of crops, realizes dual promotion of soil improvement and crop growth, and has remarkable social and economic benefits.

The invention discloses a composite nano sound-sensitive agent as well as a preparation method and application thereof. According to the composite nano sound-sensitive agent provided by the invention, a conjugated system of the narrow-gap semiconductor nano sound-sensitive agent core / the ferric oxide nano functional layer / the surface targeting antibody is constructed, so that multi-mode synergy integrating sonodynamic therapy, ferroptosis induction and immunoregulation is realized. The composite nano sonosensitizer further has precise targeting, efficient sonodynamic effect, ferroptosis enhancement effect and good biocompatibility, a targeting antibody on the surface of the composite nano sonosensitizer can specifically recognize high-expression antigens on the surfaces of tumor cells, and dual-targeting enrichment of a treatment system is achieved in combination with magnetic responsiveness guidance; the coating of the iron oxide nanoparticles obviously enhances the sound-sensitive performance of the inner core of the sound-sensitive agent, improves the ROS generation efficiency, and overcomes the hypoxia limitation of the tumor microenvironment; iron oxide is used as an iron source to continuously release Fe < 2 + >, and cooperates with ROS generated by sonodynamic therapy to induce ferroptosis, so that a ferroptosis enhancing effect is generated.

The invention discloses an auxiliary protein composition, iron oxide nanoparticles, a preparation method and application, the composition comprises an SC protein with an amino acid sequence as shown in SEQ ID NO: 1 and an ST protein with an amino acid sequence as shown in SEQ ID NO: 2, and the composition can be used for modifying the iron oxide nanoparticles. The auxiliary protein composition can effectively promote endocytosis of the iron oxide nanoparticles, and assists the iron oxide nanoparticles to realize lysosome escape; moreover, the iron oxide nanoparticles modified by the auxiliary protein composition are good in biocompatibility and long in retention and storage time in cells, can be used for long-time labeling of the cells, and have wide clinical transformation and application prospects as a cell tracer agent.

The invention discloses application of iron oxide nanoparticles in target treatment of schistosome eggs, and relates to the cross technical field of nano material target delivery and disease prevention and control. On the basis of paramagnetism, a microtubule structure and surface electrical characteristics of schistosoma japonicum egg shells, electrically neutral Fe3O4 magnetic nanoparticles with the particle size of 8-15 nm or electropositive Fe3O4-NH2 magnetic nanoparticles with the surface modified by amino groups are innovatively adopted, efficient egg penetration is achieved through magnetic targeted enrichment and physical-static synergistic effect, and in-vivo and in-vitro experiments prove that the effect of effectively penetrating through the eggs is achieved. The Fe3O4 and Fe3O4-NH2 nanoparticles have obvious worm egg targeting capability, and the penetrating efficiency of the Fe3O4 and Fe3O4-NH2 nanoparticles on worm eggs exceeds 38%, so that an important experimental basis is provided for subsequent development of a nano-drug delivery system for preventing and treating schistosomiasis.

A method of adsorbing chloride ions from an aqueous solution with a nanocomposite. The nanocomposite including iron nanoparticles, aluminum nanoparticles and guar gum. The nanocomposite is in the form of extruded cylindrical particles in which the iron nanoparticles and the aluminum nanoparticles are dispersed in a matrix of the guar gum.

The invention discloses a binder-free silicon / carbon nanotube composite carbon fiber negative electrode material, a preparation method thereof and an application of the binder-free silicon / carbon nanotube composite carbon fiber negative electrode material in a lithium ion structure energy storage composite material. Carbon fibers are used as a substrate, catalyst nanowires are grown through a hydrothermal method, then dicyandiamide is used as a carbon source and a nitrogen source through a chemical vapor deposition method, and the binder-free silicon / carbon nanotube composite carbon fiber negative electrode material is prepared. Uniform and compact carbon nanotubes doped with nitrogen and embedded with ferrocobalt nanoparticles and arranged in a three-dimensional disordered structure grow on the surface of the carbon fiber, and then ultra-thin nano silicon is uniformly sputtered on a carbon nanotube substrate supported by the carbon fiber through a radio frequency plasma magnetron sputtering technology. The carbon nano tube and the silicon material are effectively compounded together, the advantages of carbon and silicon are combined, and a synergistic effect is achieved. When the obtained silicon-carbon composite material is used as a negative electrode material of a lithium ion structure energy storage composite material, excellent electrochemical performance and cycling stability are shown, and the flexible structure and excellent mechanical performance ensure efficient use of the material in different fields and different application scenes.

The invention belongs to the technical field of nano-enzyme materials, and discloses a cucurbituril nano-enzyme for dispelling effects of alcohol and protecting liver and a preparation method thereof. The antialcoholism and liver-protecting cucurbituril nano-enzyme comprises cucurbituril, heme iron and hydrated iron nano-particles. The cucurbituril nano-enzyme capable of dispelling effects of alcohol and protecting liver keeps constant catalytic efficiency in a pH range of 4.0-8.8, is resistant to high and low temperatures, does not inactivate, can complete ethanol decomposition in the stomach, and has the effect of protecting liver.

The application discloses a kind of by mesoporous Fe 0 Nanometer material enhances the method for activity of gallic acid and application thereof.The present application fixes gallic acid (GA) with redox activity in mesoporous zero-valent iron nanoparticles (Fe 0 NPs), and then encapsulated by SiO2 outer layer containing disulfide bond (denoted as Fe 0 @GA-ss-SiO2NPs). With the help of intracellular glutathione, oxygen molecules are activated by electron transfer, and a large amount of O2 ·‑ And H2O2 are spontaneously generated, and the sustained high concentration of Fe 0 Fe 2+ Further catalyzes the decomposition of H2O2, and generates highly oxidized ·OH free radicals. At the same time, GA quinone derivatives produce 1 O2 by Russel mechanism. In vitro cell experiments confirm that the nanometer material can cause cancer cell ferroptosis, and exhibits high-efficiency cancer cell killing effect at ultra-low dose.

The present invention relates to a catalytically active material comprising non-graphitizing carbon grains with iron nanoparticles dispersed therein, wherein dp, the average diameter of the iron nanoparticles in the non-graphitizing carbon grains, is in the range of 1 nm to 20 nm, D, the average distance between iron nanoparticles in the non-graphitizing carbon grains, is in the range of 2 nm to 150 nm, and Δ, the combined total mass fraction of metal in the non-graphitizing carbon grains, is in the range of 30 wt% to 70 wt% of the total mass of the non-graphitizing carbon grains, and wherein dp, D, and Δ conform to the following relationship: 4.5 dp / Δ > D = 0.25 dp / Δ. Furthermore, the present invention relates to a process for manufacturing the material according to the invention, as well as its use as a catalyst.

The invention discloses a carbon nano composite conductive material and application thereof in a cable shielding layer, and belongs to the technical field of conductive shielding materials, the carbon nano composite conductive material comprises 20-35 parts of magnetic iron / PEDOT: PSS nanoparticles and 40-65 parts of a carbon nano material; the magnetic iron / PEDOT: PSS nanoparticles are obtained by modifying the surfaces of magnetic iron nanoparticles with 3, 4-ethylenedioxythiophene: poly (styrene sulfonic acid); the carbon nanomaterial is one or more of carbon black, graphene oxide, reduced graphene oxide and a carbon nanotube. The carbon material is used as the conductive material, and the magnetic iron / PEDOT: PSS nanoparticles are added to replace part of the conductive filler, so that the cable has the advantages of strong anti-interference capability, light weight, high strength and good flexibility.

The invention relates to an iron-loaded graphene fiber rod catalyst as well as a preparation method and application thereof, and belongs to the technical field of water treatment. The preparation method comprises the following steps: calcining biomass to form a graphene-like structure carbon skeleton, carrying out surface modification on the graphene carbon skeleton to load iron nanoparticles on the surface, forming Fe-O-C or / and Fe-N-C bond bridge connection, taking metal iron as an active center, forming an electron-rich center by a Fe site, and forming an electron-deficient center around a graphene-like C site. The catalyst prepared by the method disclosed by the invention can effectively remove organic pollutants in water without adding extra energy and under natural conditions.

This invention relates to a mesoporous single-atom iron nanoparticle self-catalyzing material, its preparation method, and its application. The mesoporous single-atom iron nanoparticle self-catalyzing material comprises: a mesoporous polydopamine framework, and Fe metal catalytic centers chelated in the mesoporous polydopamine framework in the form of single atoms; the mesoporous polydopamine framework has catechol functional groups.

The invention discloses an iron / graphene oxide composite membrane for stable and complete dehalogenation, a preparation method of the iron / graphene oxide composite membrane and application of the iron / graphene oxide composite membrane in a self-circulation reduction system, and belongs to the field of catalytic membrane technologies and water treatment materials. According to the composite membrane, superfine zero-valent iron nanoparticles are uniformly loaded on a graphene oxide sheet layer through an in-situ growth method, and a ferrous iron-ferric iron-reduced graphene oxide cyclic catalytic system is constructed by utilizing a nano confinement effect in the membrane. The ferrous iron activates the sulfite to generate sulfite free radicals and ferric iron, and meanwhile, the ferric iron is reduced and regenerated into the ferrous iron by electrons provided by the reduced graphene oxide, so that a self-sustaining self-circulation catalytic system is formed. The system can realize efficient, rapid and stable degradation and complete dehalogenation of halogenated organic pollutants in a water body. The preparation process is simple, the material stability is high, the catalytic efficiency is remarkable, and the good practical application prospect is achieved.

The invention provides an iron composite nitrogen-doped graphene-like catalyst as well as a preparation method and application thereof, and belongs to the technical field of water treatment catalyst preparation. The catalyst provided by the invention comprises an outer coating layer and an inner core to form a coated structure, the outer layer is a nitrogen-doped graphene-like material; the inner core is metal iron nanoparticles, and the size of the metal iron nanoparticles is smaller than 200 nm. The preparation method is simple and low in equipment requirement. The prepared NG-coated Fe catalyst can effectively and rapidly remove organic pollutants such as bisphenol, ciprofloxacin and atrazine in water under the condition that an oxidizing agent is not added, and the removal rate within 15 minutes is larger than 80%; the catalyst has a good removal effect on organic pollutants which are difficult to biodegrade under the neutral room temperature condition, and is good in stability and very low in dissolution rate of metal ions in the catalyst.

The invention discloses a composition with a tumor mitochondrial dual regulation effect, temperature-sensitive hydrogel and application, and belongs to the technical field of biological medicine, the composition is composed of a peroxide initiator and a mitochondrial autophagy inhibitor, the peroxide initiator is used for causing mitochondrial damage, and the mitochondrial autophagy inhibitor is used for causing mitochondrial autophagy. The mitochondrial autophagy inhibitor is used for inhibiting mitochondrial The peroxide initiator is indocyanine green, chlorin, iron oxide nanoparticles or Fe-MOFs (Metal-Organic Frameworks); the mitochondrial autophagy inhibitor is chloroquine, 3-methyladenosine or bajulomycin A1; the tumor is specifically melanoma; the combination of the peroxide initiator and the mitochondrial autophagy inhibitor can better inhibit the energy metabolism of tumor cells and inhibit the occurrence and development of tumors, and after the composition is delivered through the temperature-sensitive hydrogel carrier, the treatment effect of the composition on tumors is further improved.

The invention discloses a salvinia natans bionic coating based on a reusable thermosensitive softening template and deep pinning and a preparation method of the salvinia natans bionic coating. The coating is prepared from epoxy resin, ferroferric oxide nano particles, ferroferric oxide micro particles, ferroferric oxide particles modified by 3-aminopropyl triethoxy silane, corn starch, polyvinylpyrrolidone, octadecylamine, perfluorooctyltriethoxy silane and deionized water, and the ferroferric oxide particles are prepared from epoxy resin, ferroferric oxide nano particles, ferroferric oxide micro particles, 3-aminopropyl triethoxy silane modified ferroferric oxide particles, corn starch, polyvinylpyrrolidone, octadecylamine, perfluorooctyltriethoxy silane and deionized water. Preparing magnetic slurry from epoxy resin, a solvent and ferroferric oxide particles, and performing staged magnetic field curing; preparing a thermosensitive template with modified ferroferric oxide as an inner core and corn starch as a shell, and embedding the micro-bulge tips under thermosensitive and magnetic field conditions; and carrying out hydrophobization treatment under the protection of the template, and finally heating and ultrasonically recovering the template. The cost is reduced through a reusable template, the wettability gradient is kept stable through deep pinning, ordered distribution of particles is achieved through layered magnetic field regulation and control, the gas film coverage rate and stability are improved, and the method is suitable for ships, ocean engineering and antifouling protection.

The invention relates to a magnetic mesoporous material based on functionalised silica (3MS-f), the method comprising the steps of: i) hydrolysing and precondensing, in an acid medium, a silica precursor (SiO2) in the presence of a porogen compound having the formula (POE)n-(POP)m-(POE)n wherein: -POE is a polyoxyethylene block; -POP is a polyoxypropylene block; -n is equal to 20 or 106 and -m is equal to 70; ii) incorporating silica-coated superparamagnetic iron nanoparticles into the precondensed mixture obtained in step i) and continuing the condensation; iii) removing the porogen agent from the obtained condensed structure, whereby an organised magnetic mesoporous material based on silica (3MS) is obtained; iv) functionalising the material (3MS) obtained in the preceding step by covalently grafting at least one reactive function that is capable of forming a weak bond with at least one organic molecule of interest (MIO), the weak bond being selected in particular from among electrostatic bonds between oppositely charged groups such as carboxylate / ammonium, phosphonate / ammonium or sulphonate / ammonium and hydrophobic bonds such as bonds between alkyl chains or between aromatic groups; v) optionally, recovering the functionalised magnetic mesoporous material based on silica (3MS-f) obtained in the preceding step.

The invention discloses a black phosphorus-based composite nano material as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing black phosphorus nanosheets, freeze-dried powder of polyethyleneimine-modified magnetic Fe3O4 nanoparticles with positive charges on the surface, and a polyethyleneimine-modified glucose oxidase solution; the black phosphorus nanosheet and polyethyleneimine modified magnetic Fe3O4 nanoparticle freeze-dried powder are added into a polyethyleneimine modified glucose oxidase solution to be mixed, and a full electrostatic binding reaction is carried out. According to the preparation method, ferroferric oxide nanoparticles are loaded on black phosphorus nanosheets in an electrostatic bonding mode, glucose is oxidized, the preparation stability is excellent, the loading capacity is stable and controllable, the black phosphorus-based composite nanomaterial achieves multi-mode combined synergistic enhancement of the anti-tumor effect, and the anti-tumor effect of the black phosphorus-based composite nanomaterial is greatly improved within the high concentration range of 50-75 micrograms / mL. And the cell survival rate detected by an MTT test is more than 80%, and the cytotoxicity is low.

The application relates to the technical field of electroplating, and discloses a chromium electroplating process for improving the hardness of a connector terminal, which comprises the following steps: performing surface pretreatment on the connector terminal, removing surface impurities through ultrasonic cleaning and micro-etching treatment; performing heating treatment on the connector terminal; performing electroplating treatment on the connector terminal by using an electroplating solution comprising trivalent chromium salt, boron nitride nanoparticles, ferroferric oxide nanoparticles, nickel ions, sodium dichromate and chromium alloy additives, so as to form a chromium plating layer; performing passivation treatment on the plating layer; performing low-temperature treatment on the plating layer; and spraying a protective layer on the chromium plating layer. Through the trivalent chromium salt and the sodium dichromate, the trivalent chromium salt is used to reduce hexavalent chromium ions into trivalent chromium, the toxicity of the hexavalent chromium is reduced, the sodium dichromate is used to provide a stable chromium source, the deposition of chromium elements in the electroplating process is ensured, the pollution of hexavalent chromium to the environment and the harm of hexavalent chromium to the health of operators are solved, and the environmental protection and safety of the electroplating process are improved.

A method of making a pyrazole compound includes mixing a diazonium salt with a reactant in the presence of a solvent, thereby coupling a diazo group of the diazonium salt to an α-carbon atom of the reactant to form a reaction intermediate having a formula of (I) or (II); mixing the reaction intermediate and hydrazine in the presence of a superparamagnetic iron oxide nanoparticles catalyst thereby cyclizing the hydrazine with an ester group of the reaction intermediate to form the pyrazole compound having a formula of (III) or (IV).

The invention relates to the technical field of surface treatment, and discloses a micro-arc oxidation electrolyte which comprises a basic electrolyte for micro-arc oxidation, ferric oxide nanoparticles and a dispersing agent, and the ferric oxide nanoparticles are dispersed in the basic electrolyte. On the basis of the basic electrolyte for micro-arc oxidation, the insoluble coloring agent ferric oxide nanoparticles are added, and in the micro-arc oxidation process, the nanoparticles can be efficiently and stably integrated into a film layer, so that the high-stability red ceramic film which is uniform in color, saturated in color, high in binding force and frosted in texture is prepared. The invention further discloses a preparation method of the micro-arc oxidation electrolyte, a preparation method of the micro-arc oxidation ceramic membrane, a metal workpiece and a terminal product.

The application belongs to the field of environmental functional materials and water treatment technology, and specifically discloses a composite material for simultaneously removing antibiotics and hexavalent chromium in water based on a selenium iron / carbon molybdenum heterostructure, and a preparation method and application thereof. The composite material comprises composite selenium iron nanoparticles and carbon molybdenum, and a heterojunction interface is formed between the selenium iron nanoparticles and the carbon molybdenum. The selenium iron / carbon molybdenum catalyst constructed by the heterojunction engineering utilizes the enhanced active metal circulation reaction and a large number of in-situ generated interface defects to synergistically improve the intrinsic electron transfer capability, constructs a high-efficiency redox reaction interface platform, and efficiently activates the persulfate oxidant, so as to realize the simultaneous and rapid removal of antibiotics and heavy metals in water.