194 results about "Metal ion doping" patented technology

The invention discloses application of a metal ion doped graphene oxide film in catalytic synthesis of Schiff base. The metal ion doped graphene oxide film comprises a graphene oxide film and metal ions loaded on the surface and between layers of the graphene oxide film. Metal ions in the metal ion-doped graphene oxide film induce reactant molecule orientation through a cation-pi effect, and a confinement channel formed between the metal ions and GO is combined, so that a front line molecular orbit of a reactant for catalytic synthesis of the Schiff base is better matched, the molecular freedom degree is reduced, and the Schiff base catalytic synthesis efficiency is improved. And the molecules are subjected to bond breaking and bond forming reactions in a specific orientation. Molecules are orderly arranged among layers and flow to pass through a two-dimensional nano confinement channel provided by the graphene oxide nanosheets among the film layers, so that the reaction activation energy is reduced, and efficient catalytic synthesis of various Schiff bases is realized at room temperature. Meanwhile, by regulating and controlling the chemical microstructure of the membrane material, the catalytic reaction efficiency and the reaction selectivity can be effectively improved.

The invention discloses a lithium-rich manganese-based positive electrode material with a core-shell structure, the general formula of the lithium-rich manganese-based positive electrode material is Li < 1 + a > Mn < x > Co < y > Ni < z > O < 2-b-d > (XOc) X < d >, the lithium-rich manganese-based positive electrode material has the core-shell structure, the core is a lithium-rich manganese-based material Li < 1 + a > Mn < x > Co < y > Ni < z > O < 2-b > (XOc) doped with disordered polyanions, and the shell is a lithium-rich manganese-based material Li < 1 + a > Mn < x > Co < y > Ni < z > O < 2-d > X < d > doped with gradient non-metal ions. The invention also provides a preparation method of the lithium-rich manganese-based positive electrode material with the core-shell structure, and the lithium-rich manganese-based positive electrode material with the core-shell structure is prepared by adopting a combined means of rapid Joule heat treatment and surface plasma cleaning treatment. The polyanion-doped bulk phase disordered structure design and the surface gradient non-metal ion-doped core-shell structure are realized. Wherein the bulk phase polyanions can fix transition metal elements to inhibit migration of the transition metal elements to a lithium layer, harmful consumption of active sites is reduced, and a lattice structure is stabilized. In addition, strong bond energy between surface nonmetal and transition metal elements can inhibit dissolution of transition metal in the circulation process, irreversible oxidation of oxygen is reduced, and generation of harmful phase change is inhibited.

The invention discloses a metal-doped carbon quantum dot as well as preparation and application of the metal-doped carbon quantum dot in a nano antibacterial agent, citric acid, urea and tea polyphenol are taken as precursors, metal salt is added, carbon dot synthesis and metal ion doping are synchronously completed in one step through a hydrothermal method, and the metal-doped carbon quantum dot is prepared; the surfaces of the metal-doped carbon quantum dots are negatively charged, and the metal-doped carbon quantum dots have peroxidase-like activity and catalase-like activity at the same time; the metal ions adopt any one of Fe < 3 + >, Cu < 2 + > and Ce < 3 + >; the metal-doped carbon quantum dots are in a sphere-like shape. The metal-doped carbon quantum dots prepared by the preparation method disclosed by the invention have peroxidase-like activity and catalase-like activity at the same time through precise doping of metal ions, and the two activities have a synergistic effect in an oral periodontitis microenvironment, so that a good antibacterial effect is achieved.

The invention relates to a method for optimizing electroplating and etching process parameters, which comprises the following steps of: establishing an interface migration behavior relationship by analyzing the influence of metal ions, doped impurities and surface roughness factors on a reaction interface migration rate and a boundary layer flow behavior in an electroplating and etching process; interface migration behaviors are combined with parameter sensitivity analysis, the influence of process parameters on the interface behaviors is dynamically evaluated, and priority optimization sorting is carried out; dynamic interval zooming is carried out on the sensitive parameters by using the fitted sensitivity function, and a local adjustment range is generated according to material types and graph complexity; a preorder process memory mapping relation is introduced, and morphology evolution information recorded in the electroplating process is transmitted to an etching parameter optimization module; local fine adjustment is carried out on the etching rate, angle control and a disturbance mechanism, and the previous electroplating state is responded; collecting a fluctuation interface feedback signal; establishing a closed-loop optimization control loop of micro-disturbance, response evaluation and parameter correction; and the process consistency and the structure uniformity are improved.

The invention discloses a natural polysaccharide assisted MXene porous membrane electrode and a preparation method thereof, and relates to the technical field of electrodes. According to the technical scheme, hydrochloric acid and lithium fluoride are used for carrying out etching and intercalation on an MAX raw material, and MXene dispersion liquid is obtained; mixing the MXene dispersion liquid with a metal ion solution to obtain a metal ion doped MXene solution; mixing the metal ion doped MXene solution with a natural polysaccharide dispersion liquid to obtain a natural polysaccharide modified MXene dispersion liquid; mixing the natural polysaccharide modified MXene dispersion liquid with a template substance, performing vacuum filtration, and performing vacuum drying to obtain a flexible MXene film; and carrying out template substance removal treatment on the flexible MXene film to obtain the natural polysaccharide-assisted MXene porous film electrode. According to the invention, the stacking problem of the MXene material is solved, and the electrochemical performance of the natural polysaccharide-assisted MXene porous membrane electrode is obviously improved.

The invention discloses a preparation method of a multi-element doped ferromanganese oxide positive electrode precursor, and belongs to the technical field of lithium ion battery positive electrode material preparation. The molar ratio of manganese to iron in the multi-element doped ferromanganese oxide positive electrode precursor is x: (1-x), 0.2 lt; xlt; and the doping element accounts for 0.1-10% of the total mole number of manganese and iron. According to the multi-element doped ferromanganese oxide positive electrode precursor prepared by the invention, the coprecipitation intermediates are manganese carbonate and ferrous carbonate, and Ksp of the manganese carbonate and the ferrous carbonate are relatively close, so that the uniformity of ferromanganese can be ensured, meanwhile, metal ion doping is carried out in a liquid phase synthesis precursor stage, and the probability that doped ions enter compound lattices is greatly improved. The multi-element doped ferromanganese oxide positive electrode precursor has relatively high stability and good conductivity, and is beneficial to improving the capacity, the cycle life and the compaction density of a lithium iron manganese phosphate positive electrode material.

The invention belongs to the field of positive electrode materials, and particularly relates to a modified lithium iron phosphate positive electrode material and a preparation method and application thereof. The invention provides a preparation method of a modified lithium iron phosphate positive electrode material, which comprises the following steps: (1) mixing a lithium source, an iron source, a phosphorus source, a metal ion dopant, a non-metal ion dopant and a carbon source to prepare precursor slurry; (2) pre-sintering the precursor slurry, adding a fluxing agent, mixing, and carrying out first sintering; adding a metal salt solution for mixing, and performing secondary sintering to obtain a modified lithium iron phosphate positive electrode material; the first sintering comprises the steps of firstly raising the temperature to 550-650 DEG C and sintering for 4-8 hours, and then raising the temperature to 700-900 DEG C and sintering for 8-12 hours. The modified lithium iron phosphate positive electrode material prepared by the invention has high rate capability, cycling stability and specific capacity.

The invention discloses light-driven toxin-enriched composite hydrogel as well as a preparation method and application thereof. The composite hydrogel comprises light-driven hydrogel and detection hydrogel, the light-driven hydrogel is agarose hydrogel doped with Au (at) Ag core-shell nano particles; the detection hydrogel is a double strand formed by an okadaic acid aptamer and a complementary sequence cDNA thereof, and a double strand formed by a domoic acid aptamer and a complementary sequence DNAzyme thereof, the hairpin H1 is used for modifying a quenching group BHQ2 at the 3'end, the hairpin H2 is used for modifying a fluorophore Cy3 at the neck part, the hairpin H3 is used for modifying a fluorophore FAM and a quenching group BHQ1 at the two ends respectively, and the metal ion doped agarose hydrogel is used for catalyzing DNAzyme cyclic shearing; and the photo-thermal driving unit is positioned on the detection function unit. According to the present invention, with the composite system of upper layer photo-thermal enrichment and lower layer dual-signal detection, the rapid and high-sensitivity simultaneous detection of the okadaic acid and the domoic acid is achieved through the combination of the photo-thermal transpiration effect and the HCR and DNAzyme cyclic shearing reaction;

The invention relates to metal ion doped lithium hexafluorosilicate and a preparation method thereof, a negative plate and a preparation method thereof, and a lithium ion battery, the chemical formula of the metal ion doped lithium hexafluorosilicate is Li (2-x) AxSiF6, A is a first main group metal and does not comprise Li, x is 0.5-1.5, x is 0.5-1.5, and x is 0.5-1.5. And the negative plate comprises a current collector, an active material layer attached to the surface of the current collector, and an SEI film prepared from the Li2-xAxSiF6. The Li < 2-x > AxSiF6 has a relatively large interlayer spacing and a rich pore structure, an SEI film is pre-formed on the surface of the negative electrode plate by adopting the Li < 2-x > AxSiF6, and the desolvation capability of Li < + > can be better improved by the rich pore structure and the relatively large interlayer spacing in the circulation process; according to the present invention, the transmission of Li < + > is accelerated, and the inorganic matter-rich SEI film is generated between the SEI film and the active material layer after the uniform deposition of the lithium is induced, such that the generation of the lithium dendrites is further inhibited, the cycle stability and the service life of the lithium ion battery are improved, and the stability and the capacity of the negative electrode plate during the rapid charging are significantly improved.

The invention relates to the field of lithium cobalt oxide precursor materials, and provides a coated aluminum-doped cobaltosic oxide material and a preparation method and application thereof.The coated aluminum-doped cobaltosic oxide material comprises an inner core and a coating layer coating the inner core, the inner core comprises aluminum-doped cobaltosic oxide, the coating layer comprises an oxide containing metal ions, and the metal ions are doped in the coating layer. The metal ions comprise divalent metal ions and metal ions with the valence state larger than or equal to 3. The core of the coated aluminum-doped cobaltosic oxide material provided by the invention is aluminum-doped cobaltosic oxide, so that the capacitance of the positive electrode material is improved; divalent metal ions contained in the coating layer are doped in Li ion sites to play a role similar to supporting columns, and the supporting structure is stable; metal ions with the valence state larger than or equal to 3 are doped in Co ion sites, the lattice distortion relieving effect is achieved, the structural stability can be improved by forming strong combination with lattice oxygen, and the cycle stability of the positive electrode material can be improved through the synergistic effect of divalent metal ions and high-valence metal ions wrapped on the outer layer.

The invention provides application of a metal ion doped aminated graphene oxide membrane material in catalyzing CO2 to synthesize cyclic carbonate. The metal ion doped aminated graphene oxide membrane material has an acidic catalytic site and an alkaline catalytic site at the same time, and a two-dimensional interlayer channel of the metal ion doped aminated graphene oxide membrane material also has a confinement effect. In the process of catalyzing a CO2 / epoxy compound cycloaddition reaction, epoxy compound molecules entering a two-dimensional interlayer confinement channel of the metal ion doped aminated graphene oxide membrane material are subjected to efficient ring opening under the combined action of organic amine molecules and metal ions and react with CO2; and finally, realizing CO2 high-efficiency (the reaction time is less than or equal to 5 minutes, and the conversion rate of the epoxy compound is 75-100%) synthesis of the cyclic carbonate under the conditions of room temperature and low pressure (greater than 0.1 MPa and less than or equal to 1 MPa).

This invention discloses a core-shell structured lithium-rich manganese-based cathode material with the general formula Li. 1+a Mn x Co y Ni z O 2‑b‑d (XO c ) b X d It has a core-shell structure, with the core being a disordered polyanion-doped lithium-rich manganese-based material, Li. 1+a Mn x Co y Ni z O 2‑b (XO c ) b The outer shell is made of lithium-rich manganese-based material Li, which is doped with gradient non-metallic ions. 1+ a Mn x Co y Ni z O 2‑d X d This application also provides a method for preparing a core-shell structured lithium-rich manganese-based cathode material. The method employs a combination of rapid Joule heating and surface plasma cleaning to prepare the aforementioned core-shell structured lithium-rich manganese-based cathode material, achieving a bulk disordered structure design with polyanion doping and a core-shell structure with surface gradient non-metallic ion doping. Specifically, the bulk polyanions can immobilize transition metal elements to suppress their migration to the lithium layer, reducing harmful consumption of active sites and stabilizing the crystal structure. Furthermore, the strong bond energy between the surface non-metallic elements and the transition metal elements can suppress transition metal dissolution during cycling, reducing irreversible oxygen oxidation and inhibiting harmful phase transitions.

The invention discloses a preparation method of a full-spectrum response plasmon photocatalyst for reducing carbon dioxide to prepare methane, and belongs to the technical field of photocatalytic reduction of CO2. Tungsten hexacarbonyl and silver nitrate, nickel chloride or chloroauric acid are used as raw materials, and a solvothermal reaction is performed to obtain a plasmon W18O49 nanowire photocatalyst doped with different metal ions. According to the preparation method for preparing the CH4 plasmon photocatalyst through full-spectrum response CO2 reduction, the prepared Au, Ag or N metal ion doped plasmon W18O49 nanowires have high ultraviolet-visible-near infrared light absorption capacity and rich surface oxygen vacancy concentration, adsorption and activation of CO2 molecules are facilitated, meanwhile, the surface oxygen vacancy concentration is increased, and meanwhile, the surface oxygen vacancy concentration is increased. The surface of the catalyst can effectively stabilize a * CO intermediate generated in the photocatalytic CO2 reduction process, and the performance and selectivity of the original plasmon W18O49 for preparing CH4 through photocatalytic CO2 reduction are remarkably improved.

The invention relates to the technical field of medical breathable films, in particular to a medical and sanitary antibacterial deodorizing polyethylene breathable film and a preparation method thereof. The invention relates to an antibacterial deodorizing polyethylene breathable film for medical and sanitary use. The antibacterial deodorizing polyethylene breathable film is prepared by compounding metal ion doped mesoporous silica (MSN) with polyethylene (PE) breathable particles, the particle is prepared from 1-5 parts of a metal ion doped mesoporous silica nano antibacterial agent MSN and 100 parts of PE breathable particles. A resin matrix in the PE breathable particles is low-density polyethylene (LDPE) or linear low-density polyethylene (LLDPE); the inorganic filler for forming the microporous structure in the PE breathable particles comprises at least one of stearic acid modified calcium carbonate with the average particle size of 50-2000 nm, talcum powder, calcined shell powder, kaolin, silica fume, zeolite powder, titanium dioxide, silicon dioxide and glass powder. The PE breathable film has deodorizing, antibacterial and antistatic effects, is used in the field of medical non-woven fabrics, and reduces the bacterial infection risk of medical staff.

The invention discloses an O3-P2 layered double-phase sodium ion battery positive electrode material and a preparation method thereof, and belongs to the technical field of sodium ion batteries. The chemical formula is Na (1.0-x) MxNiaMnbMe1-a-bO2, x is more than 0 and less than 0.5, a is more than 0.1 and less than 0.9, b is more than 0.1 and less than 0.9, a + b is more than 0.2 and less than 1, M is a metal element, and Me is a transition metal element. Through doping of metal ions, an impurity phase component in an original positive electrode material is converted into a layered P2 phase component, and the O3 and P2 layered two-phase sodium ion battery positive electrode material is formed. The composite phase structure obtained through metal ion doping enhances the structural stability of the material, so that the positive electrode material has the advantages of low cost, low strain, high capacity, good cycling stability and rate capability, simple preparation process, high repeatability and great potential for large-scale production.

The invention relates to a preparation method of monodisperse doped titanium dioxide with in-situ lattice strain, and belongs to the field of preparation of nano functional material dispersions. The titanium dioxide prepared by the method has abundant oxygen vacancies and surface active sites. According to the method, a titanium source is injected twice, a rapid heating solvothermal reaction is carried out, lattice strain regulation and control are achieved through lattice shrinkage rate difference at an amorphous and crystal interface, oxygen vacancy forming energy is reduced, and an oxygen vacancy structure is further stabilized through doping of low-valence metal ions. And the surface modifier can regulate and control the surface properties of the particles to adapt to various solvent systems, so that a high-transparency composite functional material is conveniently prepared.

The disclosure provides a metal ion doped lithium iron phosphate material and a preparation method and application thereof, and relates to the technical field of lithium batteries. The metal ion doped lithium iron phosphate material comprises flaky lithium iron phosphate and metal ions doped on the flaky lithium iron phosphate, and the flaky lithium iron phosphate has a porous structure. The method comprises the following steps: using an organic metal compound as a deposition raw material to deposit a carbon layer and metal oxide particles on the surface of a porous Fe2O3 flaky precursor to obtain a composite material; mixing the composite material, a lithium source and a phosphorus source according to a stoichiometric ratio, and then drying and sintering to obtain an M-LiFePO4 material. The M-LiFePO4 prepared by the disclosure has good uniformity and is not prone to agglomeration, inherits the two-dimensional flaky morphology of the precursor material and has a porous structure, has good rapid charging and discharging capacity, and improves the rate performance of the lithium iron phosphate material through doping of metal ions.

The invention discloses a defect regulation and control method for improving the phase stability of inorganic perovskite CsPbI3, and the method comprises the steps: firstly constructing different defect models for CsPbI3, carrying out the structural optimization of the defect models and an initial CsPbI3 structure, carrying out the calculation of a phase change barrier based on the optimized structure, determining the influence of the atom vacancy defect concentration on the stability, and carrying out the calculation of the phase change barrier. The method comprises the following steps: firstly, selecting a CsPbI3 model, then, carrying out metal ion doping replacement on the initial CsPbI3 model, carrying out structure optimization on the replaced model, finally, carrying out formation energy calculation on the optimized structure, and determining the optimal doped and replaced metal ion, thereby completing the defect regulation and control of the CsPbI3 phase stability. According to the scheme of the invention, based on the formation of the metal ions capable of determining the optimal doping and replacement of the inorganic perovskite CsPbI3 material, the optimal regulation and control of the defects of the inorganic perovskite CsPbI3 material are realized, the service life of the perovskite solar cell is remarkably prolonged, the solar cell is enabled to convert solar energy into electric energy more effectively, and the efficiency of the solar cell is improved. The power generation capability of the solar cell is improved, and the cost is effectively saved.

The invention discloses a high-performance long-cycle lithium iron phosphate positive electrode material and a preparation method thereof, and solves the technical problem of poor long cycle performance of existing lithium iron phosphate due to non-uniform and unstable carbon layer network. The preparation method comprises the following steps: S1, mixing and ball-milling iron phosphate A and iron phosphate B with different specific surface areas, lithium carbonate, a carbon source, an organic polymer dispersant and a metal ion doping agent to form precursor slurry; s2, drying the precursor slurry to obtain a precursor yellow material; s3, performing primary calcination on the precursor yellow material in an inert gas atmosphere to obtain lithium iron phosphate powder, and crushing the lithium iron phosphate powder; s4, uniformly mixing the crushed lithium iron phosphate with a carbon source, a nitrogen-containing organic matter and a metal ion doping agent, and carrying out spray drying after ball milling; and S5, carrying out secondary calcination on the spray-dried material in an inert gas atmosphere to obtain the lithium iron phosphate with the nitrogen atom-doped carbon coating layer. The lithium iron phosphate positive electrode material has the advantages of stable structure, good long cycle performance and the like.

The invention relates to an alkaline earth metal ion doped titanium-based phosphate composite material as well as a preparation method and application thereof, and belongs to the technical field of sodium ion batteries. The chemical formula of the alkaline earth metal ion doped titanium-based phosphate composite material is KxMyTiOPO4 / C, M is selected from one or more of beryllium, magnesium, calcium, strontium and barium, x is larger than or equal to 0.8 and smaller than or equal to 0.95, y is larger than or equal to 0.001 and smaller than or equal to 0.1, and the values of x and y meet the charge balance of the chemical formula. By doping alkaline earth metal ions, the lattice structure is effectively stabilized, and the exchange of K-Na ions is avoided, so that the cycling stability of the battery is remarkably improved, and the service life of the battery is remarkably prolonged.

The invention relates to a preparation method and application of a tooth antibacterial and mineralized dual-function anti-caries material. The anti-caries material provided by the invention comprises two components, namely a mineralizing solution I and a mineralizing solution II. The mineralization liquid I contains polyelectrolyte and soluble salt of antibacterial metal cations; and the mineralization liquid II contains phosphate and fluoride. The pH values of the two mineralizing solutions are both 9.5 + / -0.5. During use, the surface of a demineralized tooth is firstly cleaned, the mineralizing liquid I and the mineralizing liquid II are sequentially coated, flushing is performed after each action for 15 minutes, 1-3 cycles are performed every day, and continuous treatment is performed for 7-14 days. Through polyelectrolyte template guiding and antibacterial metal ion doping, a biomimetic mineralization layer with an antibacterial function is formed on the surface of the demineralized tooth, and the dual functions of antibacterial and remineralization are achieved. The material can significantly recover the mechanical properties of teeth, the elastic modulus and hardness recovery rates respectively reach 68.6% and 62.5%, the dental caries score is reduced by 70% or more, and the dental caries prevention material has an excellent dental caries prevention effect and a clinical application prospect.

The invention provides a UV-cured color-tunable dual-emission room-temperature phosphorescent material as well as a preparation method and application thereof, and belongs to the technical field of color-tunable room-temperature phosphorescent functional materials. According to the invention, nitrogen-doped or nitrogen-metal ion-doped carbon quantum dots are used as a main ultraviolet light response phosphorescence color development center, a polyacrylamide and cellulose-based derivative double network is used as a substrate and a secondary phosphorescence color development center, acrylamide double bonds are broken into polyacrylamide through ultraviolet light, and further dehydration is carried out; the prepared room-temperature phosphorescent material shows different visible light colors under the excitation of ultraviolet light with two wavelengths, is tunable in color, can be applied to the fields of anti-forgery ink, optical information coding, photoelectric devices, advanced information encryption, humidity sensing detection and the like, and has wide application prospects. Wide popularization and application prospects are realized.

The application provides a positive electrode material and a preparation method thereof, an electrochemical device and an electronic equipment, and particularly relates to the technical field of batteries. 1+x M 1‑x O2, wherein 0 3+ and Zr 4+ , the anion includes F ‑ , and the alkali metal ion includes Na + . The application can effectively improve the problems of low first coulomb efficiency, serious voltage attenuation and poor safety of the lithium-rich layered positive electrode material.

The invention discloses bimetal ion co-doped zinc oxide nano-powder and a preparation method thereof, and belongs to the technical field of zinc oxide doped nano-material preparation, the bimetal ion co-doped zinc oxide nano-powder simultaneously comprises two different metal ions doped, the chemical formula of the bimetal ion co-doped zinc oxide nano-powder is Zn (1-x-y) M1xM2yO, x is more than 0.005 and less than 0.05, y is more than 0.005 and less than 0.05, M1 is a gallium ion, y is more than 0.005 and less than 0.05, y is more than 0 and less than 0.05, y is more than 0 and less than 0.05, x is more than 0 and less than 0.05, y is more than 0 and less than 0.05, y is more M1 is an aluminum ion, M2 is an aluminum ion, or M1 is an aluminum ion and M2 is a gallium ion. The preparation method provided by the invention adopts a pre-polymerization-pyrolysis method to solve the problem of difficulty in co-doping due to reaction activity difference during co-doping of multiple ions, and is simple to operate, easy to control the reaction process, high in polymerization rate, free of generation of byproducts and suitable for industrial production. The prepared bimetallic ion co-doped zinc oxide nano powder is uniform in composition and high in purity. The preparation technology provided by the invention is low in raw material cost, relatively high in yield, high in process adaptability and suitable for large-scale industrial production; according to the preparation technology provided by the invention, the doping amount of different metal ions in the zinc oxide crystal can be accurately controlled, and compared with aluminum or gallium single metal doping, the zinc oxide crystal has more excellent performance, so that the production cost can be reduced, and the related performance of a doped ZnO-based material can be improved.

The invention discloses a high-capacity aromatic pinene formaldehyde adsorbent and a preparation method thereof, the adsorbent comprises a meso-porous silicon substrate, pinene covalently grafted on the meso-porous silicon substrate and metal ions doped in the meso-porous silicon substrate, pinene is alpha-pinene or beta-pinene, the pinene and hydroxyl contained in the meso-porous silicon substrate form a covalent bond through a silane coupling agent, and the metal ions are doped in the meso-porous silicon substrate. The grafting amount of pinene is 5-15 wt%, the metal ions are one or more of Zn < 2 + >, Cu < 2 + > and Ni < 2 + > and exist in the form of metal oxides or metal hydroxylates, and the doping amount of the metal ions is 0.5-3 wt%.

The invention discloses an alkylation catalyst and application thereof in raspberry ketone synthesis, and the preparation method of the catalyst comprises the following steps: (1) pretreatment: washing ion exchange resin with an alcohol solvent to remove impurities, and drying to obtain pretreated resin; (2) hydrophobization treatment: carrying out hydrophobization treatment on the resin pretreated in the step (1) and silane, and then washing and drying to obtain hydrophobized modified resin; and (3) metal ion doping: dipping the hydrophobic modified resin in a metal ion solution for doping, and then filtering, washing and drying to obtain the modified acidic cation exchange resin catalyst. When the catalyst is applied to raspberry ketone synthesis, the catalytic activity, the selectivity and the stability of the catalyst are superior to those of a traditional method and an unmodified catalyst, and the catalyst has remarkable industrial application value.

The invention relates to a preparation method and antibacterial application of an adjustable manganese-based Prussian blue analogue. Through metal ion doping and lattice engineering regulation and control, a manganese element is introduced into a Prussian blue frame structure, and controllable regulation of the doping amount and optimization of a crystal structure are realized. The prepared material has excellent photothermal conversion capability and multienzyme simulation activity, and shows a photothermal-enzyme synergistic enhancement effect under the irradiation of near-infrared light. In-vitro studies show that the material can efficiently inhibit the growth of gram-negative bacteria; animal experiments further verify that the composition has a remarkable curative effect in infected wound repair. The invention not only provides a preparation method of a nano material with controllable metal doping, but also provides a novel photo-enzyme synergistic treatment method for drug-resistant bacterium infection treatment.

The present invention provides a preparation method and application of a lithium iron phosphate positive electrode material. The preparation method comprises the following steps: (1) after a first mixing of an iron source and pure water, oxidation is sequentially performed, a metal ion doping source is added for a second mixing, and a phosphorus source is added for a third mixing to obtain a pure water system mixed solution, an alcohol solution is added to the pure water system mixed solution for a fourth mixing, and then the mixture is allowed to stand, and an iron phosphate precursor is obtained after centrifugal washing; (2) after a first grinding of the iron phosphate precursor and a lithium source in step (1), a carbon source is added for a second grinding to obtain a mixed powder, the mixed powder is sequentially subjected to a first sintering to obtain a first carbon-coated lithium iron phosphate, the first carbon-coated lithium iron phosphate is subjected to a second sintering, and the lithium iron phosphate positive electrode material is obtained after screening. The preparation method of the present invention has the advantages of low cost and high preparation purity.

The present invention belongs to the field of semiconductor material preparation, and specifically relates to a tin oxide electronic paste and its preparation method and application, including mixing tin oxide nanoparticles with metal ion dopants, solvents, and binders and performing dispersion treatment, wherein the molar ratio of the tin oxide nanoparticles to the metal ion dopants is determined according to the electrical properties of the desired tin oxide electronic paste; the binder is used for bonding, pore formation, and dispersion of the paste; the mixture after the dispersion treatment is concentrated to obtain the desired tin oxide electronic paste. The tin oxide film layer is further obtained by coating and sintering, which can be applied to the carrier transport layer or buffer layer in optoelectronic devices such as solar cells, light-emitting diodes, and field effect transistors. The present invention can adjust the semiconductor properties of the tin oxide film layer by performing doping treatment during the paste preparation process to achieve the improvement of device performance, and the process is simple, the conditions are easy to control, and it can be prepared in batches, and has good application prospects.

The invention relates to the field of lithium ion battery positive electrode materials, and particularly discloses a preparation method and application of a co-doped ferrous phosphate precursor material.The preparation method comprises the steps that an antioxidant solution and a salt solution containing doped metal ions are added into a ferrite solution, and an iron source mixed solution is obtained; mixing and reacting a phosphorus source, an iron source and an alkaline solution to obtain blue ferrous phosphate slurry; and then filtering, washing, drying and crushing to obtain the doped ferrous phosphate precursor material. According to the invention, doping and morphology regulation and control are integrated in a single reaction system through a metal ion doping process, so that the preparation process is greatly simplified, and the compaction density and the rate capability of the prepared lithium iron phosphate positive electrode material are remarkably improved.