411 results about "Metal doped" patented technology

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 discloses a carbon nitride-based composite material as well as a preparation method and application thereof. The carbon nitride-based composite material comprises a non-metal doped carbon nitride carrier and a noble metal, wherein the noble metal exists in the carrier in an element doping form and / or is loaded on the carrier in an oxide form; the precious metal is one or more of Pt, Pd, Au and Ru, and the nonmetal is one or more of P, S and I. According to the carbon nitride composite material disclosed by the invention, noble metal is utilized to modify carbon nitride, the number of surface active sites is increased, the electron and chemical structures of an active center are adjusted, and meanwhile, generation and migration of photo-generated charges are promoted. Meanwhile, the surface of the carbon nitride composite material is modified by non-metallic elements, so that adsorption and activation of reactant H2O molecules are effectively promoted. The catalyst disclosed by the invention is simple in preparation process, good in repeatability and easy for large-scale production.

The invention discloses a hydrogel-based water-energy-resource co-production solar evaporator and application thereof, and belongs to the technical field of chemistry and environment, the hydrogel-based water-energy-resource co-production solar evaporator is prepared by taking sodium alginate hydrogel as a matrix, adding carbon nanotubes and a titanium-based lithium ion sieve or a metal-doped titanium-based lithium ion sieve into a solution of the sodium alginate hydrogel, taking polyurethane sponge as a carrier frame, and preparing the hydrogel-based water-energy-resource co-production solar evaporator. Ca2 + is adopted as a cross-linking agent to construct a solar evaporator with a flexible size (centimeter-level to meter-level components can be prepared according to application scenes), the solar evaporator is used for the solar driven evaporation process of lithium-containing water resources such as salt lake seawater, and Li + selective enrichment, fresh water collection and waste heat power generation are synchronously achieved. Moreover, the evaporator has the characteristics of simple preparation process, low cost and excellent environmental compatibility, also has a good removal effect on salt ions, and keeps stable fresh water collection performance in a long-time operation process.

The invention discloses a preparation method of a metal doped type hydroxyapatite nanoflower. The method specifically comprises the following steps: dispersing a calcium source and soluble metal salt into water, adding acid phosphate, urea and L-histidine, uniformly mixing, carrying out a hydrothermal reaction, mechanically stirring, filtering, washing, and drying a hydrothermal system precipitate to obtain the corresponding metal-doped hydroxyapatite nanoflower. Compared with the prior art, the metal-doped hydroxyapatite nanoflower prepared by the preparation method disclosed by the invention is directly assembled by nanosheets, and a single metal type can be doped in a customized manner. According to the method, water is used as a unique solvent, the use of an organic solvent is avoided, the pH does not need to be adjusted in advance, the technological process is simple, operation is convenient, equipment investment is small, and the method is suitable for industrial production.

The invention relates to a lithium iron phosphate material, a preparation method thereof and a lithium ion battery, hydroxyl iron phosphate and hydroxyl iron phosphate containing metal doping elements are respectively used as phosphorus and iron sources to prepare a precursor, the compaction density of the lithium iron phosphate material is effectively improved based on a four-level grain size distribution design, and meanwhile, the capacity is ensured to be efficiently exerted. When the lithium iron phosphate material is used for preparing a lithium ion battery, the energy density, the rate capability and the cycle life of the battery can be remarkably improved, the development requirements of high-end application markets such as long endurance of electric automobiles and high efficiency of energy storage systems are met, and the lithium iron phosphate material has a good industrial application prospect.

Exemplary semiconductor processing methods may include depositing a metal-doped boron-containing material on a substrate disposed within a processing region of a semiconductor processing chamber. The metal-doped boron-containing material may include a metal dopant comprising tungsten. The substrate may include a silicon-containing material. The methods may include depositing one or more additional materials over the metal-doped boron-containing material. The one or more additional materials may include a patterned photoresist material. The methods may include transferring a pattern from the patterned photoresist material to the metal-doped boron-containing material. The methods may include etching the metal-doped boron-containing material with a chlorine-containing precursor. The methods may include etching the silicon-containing material with a fluorine-containing precursor. The metal dopant may enhance an etch rate of the silicon-containing material. The methods may include removing the metal-doped boron-containing material from the substrate with a halogen-containing precursor.

The invention discloses a solid electrolyte-coated silicon-carbon composite material and a preparation method thereof, and is characterized in that a negative electrode material has a core-shell structure, the core is metal-doped porous carbon and nano silicon deposited in pores, and the shell is a solid electrolyte complex. The preparation method comprises the following steps: uniformly mixing an emulsifier, a phenolic compound, an aldehyde compound, a cross-linking agent, a metal salt of the cross-linking agent and a template agent, then adding an oxidizing agent for reaction, and preparing metal-doped porous carbon through heteroatom doping and activation; depositing nano silicon through a vapor deposition method, coating the surface of the nano silicon with a solid electrolyte through a liquid phase method, and carbonizing to obtain the solid electrolyte coated silicon-carbon composite material. The obtained material has the characteristics of excellent fast charging performance, high initial efficiency and the like when applied to lithium ion batteries.

The invention discloses a high-power silicon-carbon composite material as well as a preparation method and application thereof, and the preparation method comprises the following steps: preparing nano-metal particles, depositing amorphous carbon on the surfaces of the nano-metal particles through a vapor deposition method, and then carrying out acid pickling and core removal to obtain porous carbon; the preparation method comprises the following steps: preparing a silicon-carbon composite material, introducing silane gas and metal gas through a silane cracking method, depositing nano silicon and metal in pores of the silicon-carbon composite material, forming amorphous carbon on the surface of the silicon-carbon composite material, adding the amorphous carbon into a lithium sulfonate solution, and carrying out spray drying to obtain the lithium sulfonate-coated metal-doped silicon-carbon composite material. According to the obtained material, the electronic conductivity of the material is improved by doping metal in the inner core, the expansion is reduced by high-capacity porous carbon, and meanwhile, the lithium sulfonate coated on the outer layer has excellent solvation ability, so that the lithium ion transmission rate of the material is improved, and the rate capability is improved.

The invention relates to the technical field of sodium ion battery positive electrode materials, in particular to a composite sodium ferric sulfate positive electrode material, a sodium ion battery and a preparation method. The preparation method comprises the following steps: preparing a group IIIA metal doped composite sodium ferric sulfate precursor; mixing with a solution containing a sodium source, an iron source and a phosphorus source; and performing staged heat treatment under a protective atmosphere to form a pyrophosphate ferric phosphate sodium coating layer. The particle size D50 of the composite sodium ferric sulfate positive electrode material is 3-5 [mu] m, and the composite sodium ferric sulfate positive electrode material can inhibit iron dissolution and enhance structural stability through bulk phase doping and surface coating cooperation, can prolong the cycle life of a battery and reduce gas production, and is suitable for a high-performance sodium ion battery.

The invention provides an anion-cation co-doped solid electrolyte, a preparation method thereof, a solid-state battery and electric equipment, and relates to the field of solid electrolytes. The general chemical formula of the anion-cation co-doped solid electrolyte is Li < 2 + > (4-m) x Zr < 1-x > M < x > X < 6-ayAy, 0 < x < = 0.4, 0 < y < = 0.8, m is the valence state of M, and a is the valence state of A; m comprises a metal doping element with the ion radius larger than that of Zr < 4 + > and the valence state lower than that of Zr; x comprises a halogen element; a comprises one or more of O, S, N and P; the ion radius of A is smaller than X; the valence state of M comprises + 2 and / or + 3. The Li2ZrX6 solid electrolyte is subjected to anion and cation co-ion doping, so that the disorder degree of a crystal structure can be increased, a Li < + > transmission channel is widened, and the ionic conductivity is improved.

The invention provides metal-hydrogen modified porous carbon and a preparation method thereof, a silicon-carbon composite material and a preparation method thereof, and a battery, and the preparation method of the metal-hydrogen modified porous carbon comprises the following steps: mixing an aldehyde compound, a phenolic compound, a metal source and a catalyst, and carrying out heating treatment to prepare modified phenolic resin; carrying out carbonization treatment on the modified phenolic resin to prepare metal-doped porous carbon; mixing the metal-doped porous carbon with a metal hydride reducing agent, and performing reduction treatment to prepare metal-hydrogen modified porous carbon; wherein the mass ratio of metal elements to phenolic compounds in the metal source is (2-5): 100. A proper amount of metal-hydrogen bonds are introduced into the inner surface of a porous carbon pore structure; when the porous carbon is subsequently subjected to silicon deposition, low-temperature, uniform and confined deposition of nano silicon in a porous carbon matrix is facilitated, and the silicon-carbon composite material with low expansion rate and excellent electrochemical performance is prepared.

The invention relates to the technical field of environmental governance, and particularly discloses a bismuth ferrite-based photo-Fenton catalyst and application thereof. The bismuth ferrite-based photo-Fenton catalyst comprises a bismuth ferrite matrix or a catalyst, the bismuth ferrite matrix comprises Fe (NO) 9HO and Bi (NO) 5HO in a molar ratio of 1: 1-1: 1.1, the catalyst is one of metal-doped bismuth ferrite, non-metal-doped bismuth ferrite or a bismuth ferrite composite material, and the loading amount of metal in the metal-doped bismuth ferrite is 0.5-5 wt%. Fe (NO) 9HO and Bi (NO) 5HO are adopted as precursors, the stoichiometric ratio of a bismuth ferrite matrix can be regulated and controlled, generation of impurity phases is inhibited, and it is ensured that the matrix has a complete perovskite structure and a good photoresponse characteristic; meanwhile, modification means such as metal doping, non-metal doping or composite carrier loading are adopted.

The invention belongs to the technical field of inorganic nano materials and electro-catalysis, and particularly relates to a cobalt-based spinel oxide nano material as well as a preparation method and application thereof. The cobalt-based spinel oxide nano material comprises a conductive substrate and cobalt-based spinel oxide grown on the surface of the conductive substrate, the molecular formula of the cobalt-based spinel oxide is MxCo1-xO4, and M is transition metal or P-region metal and is selected from one or more of titanium, vanadium, chromium, manganese, iron, nickel, aluminum, cerium and neodymium. Multiple metal elements are doped into a cobaltosic oxide lattice, and the intrinsic structure of spinel is not changed by metal doping. Multiple metal elements are highly uniformly dispersed in the material, so that active sites are comprehensively regulated and controlled, the material shows excellent thermodynamic and chemical stability under harsh conditions of high temperature, large current, concentrated alkali and the like, is suitable for various electrolysis modes, has no metal dissolution risk in long-term operation, can effectively avoid the problems of membrane poisoning and membrane degradation, and has good application prospects. Wide application prospects are shown.

The invention relates to the technical field of high-valued utilization of solid wastes, and discloses a transition metal doped iron-containing solid waste catalytic material, a preparation method thereof and an application of the transition metal doped iron-containing solid waste catalytic material in degradation of PET (Polyethylene Terephthalate). The method comprises the following steps: carrying out physical screening or disc (ball) milling treatment on the iron-containing solid waste, then dissolving the iron-containing solid waste in organic acid, and heating and stirring to obtain turbid liquid; carrying out solid-liquid separation on the turbid liquid to obtain a solid; dissolving transition metal salt in water, adding the transition metal salt and the solid into a reaction container, adding oxalic acid, adjusting the pH value, and uniformly stirring and mixing; carrying out heating reaction on the mixed solution, and drying an obtained reaction product to obtain a precursor; and roasting the precursor to obtain the transition metal doped ferrite catalyst. The method for preparing the PET alcoholysis efficient catalyst from the iron-containing solid waste has the advantages of being low in raw material cost, high in catalytic efficiency, low in equipment requirement, easy to separate and recycle and the like, a brand new thought is provided for PET alcoholysis, the method has a large application prospect, and the catalytic material is suitable for industrialization.

The invention provides a metal-doped porous carbon material, a metal-doped silicon-carbon composite material, a preparation method and application of the metal-doped porous carbon material and the metal-doped silicon-carbon composite material, and a lithium ion battery, and belongs to the technical field of carbon materials. The preparation method comprises the following steps: mixing a phenolic compound, an aldehyde compound, a surfactant, an alkaline reagent, a metal compound and water, and carrying out addition-polycondensation reaction on the obtained mixed material liquid to obtain metal-doped phenolic resin; and sequentially carrying out re-curing treatment, pyrolysis treatment and activation treatment on the metal-doped phenolic resin to obtain the metal-doped porous carbon material. According to the metal-doped porous carbon material prepared by the method disclosed by the invention, metal is uniformly doped in the porous carbon material, and on the basis, silicon is deposited to obtain the metal-doped silicon-carbon composite material; the metal-doped silicon-carbon composite material as a negative electrode material of a lithium ion battery has relatively high initial coulombic efficiency and relatively good rate capability and cycle performance.

The invention relates to the technical field of materials, in particular to a graphdiynyl lanthanide series metal doped copper nano material and a preparation method and application thereof, and the preparation method comprises the following steps: preparing graphdiyne; in an inert gas atmosphere, graphdiyne, CuCl2. 5H2O, Dy (NO3) 3.5 H2O and ascorbic acid are subjected to a reaction in an aqueous solution, and the graphdiynyl lanthanide metal Dy doped copper nano material is obtained. Wherein the copper nano material is a cuprous oxide nano material. According to the prepared Dy-Cu2O / GDY, CO2 can be efficiently converted into C2H5OH through electrocatalytic reduction.

The invention belongs to the technical field of new materials and electronic information, and particularly relates to a transition metal doped ZnIn2S4 gas sensor as well as a preparation method and application thereof. The gas sensor comprises a substrate and a transition metal doped ZnIn2S4 nano array growing on the surface of the substrate in situ, the nano array is composed of a plurality of two-dimensional nano sheet layers, the two-dimensional nano sheet layers are arranged in a staggered stacking mode and extend at an included angle of + / -5 degrees relative to the normal direction of the surface of the substrate, and the transition metal doped ZnIn2S4 nano array is arranged on the surface of the substrate. And a network assembly with a three-dimensional flower-shaped topological structure is formed through physical or chemical connection. The preparation method is simple, the energy band structure of the material is effectively regulated and controlled, the forbidden band width is reduced, on the other hand, the specific surface area of the material is remarkably increased, and the pore size distribution is optimized. And the prepared gas sensor shows excellent gas selectivity to triethylamine, is high in response value and high in recovery speed, and is expected to be applied to the fields of environmental monitoring and food safety.

The invention provides a metal-doped biomass carbon negative electrode material and a preparation method thereof.The preparation method comprises the steps that an acid activating agent is added into biomass powder for soaking, then a pore inducer is added for high-temperature activating treatment, and activated porous carbon is obtained; preparing a mixed metal salt solution, adding the activated porous carbon into the mixed metal salt solution, sequentially stirring and standing, and performing suction filtration and drying to obtain an intermediate; and putting the intermediate into a vapor deposition reaction cavity, heating under the protection of nitrogen, introducing a silicon source gas and a germanium source gas for a deposition reaction, and cooling after the deposition reaction is completed to obtain the metal-doped biomass carbon negative electrode material. According to the process, through collaborative integration of structural design and element functions, the comprehensive electrochemical performance of the metal-doped biomass carbon negative electrode material is remarkably improved, and the problem that a traditional doped material is insufficient in stability and capacity utilization rate is solved.

The application provides a Sn-doped Fe-N-C catalyst, a preparation method and application thereof. The catalyst comprises a carrier and Sn atoms and Fe atoms supported on the carrier, and the carrier is an N-doped carbon material. The application dopes the p-block metal Sn with stronger electronegativity into the Fe-N-C catalyst, forms an electron-withdrawing environment around the FeN4 site, reduces the electronegativity of the FeN4 site, and weakens the adsorption strength of the FeN4 site on the oxygen reduction intermediate. Meanwhile, the metal Sn is weaker in reactivity with hydrogen peroxide produced by the reaction of oxygen via a two-electron process than Fe, reduces the concentration of free radicals produced by the reaction, improves the stability of the carrier and active sites, and can effectively prevent the shedding of Fe. The application uses the catalyst as a cathode catalyst of a proton exchange membrane fuel cell, is low in cost, and can simultaneously meet the requirements of high catalytic activity and good stability.

This invention discloses a reduced metal-doped lithium titanium silicate material, its preparation method, applications, and batteries. The reduced metal-doped lithium titanium silicate material has a Li composition. 2‑mx M m+ x Ti y N n+ (4‑4y) / n SiO 5‑z M is one or more of Na, K, and Mg, where 0 ≤ x ≤ 2; N is one or more of Zr, Nb, Ta, Mo, and W, where 0.8 < y ≤ 1. The reduced metal-doped lithium titanium silicate material prepared by this invention has a lower voltage plateau, higher capacity, and excellent long-cycle stability. Furthermore, the preparation method is simple, low-cost, and conducive to industrial production.

The application discloses a bimetallic doped hierarchical porous carbon catalyst and a preparation method and application thereof. The bimetallic doped hierarchical porous carbon catalyst is prepared from two transition metal salts and specific biomass powder as raw materials through 160-180 DEG C hydrothermal carbonization and 200-500 DEG C calcination. The catalyst has simple components, is cheap, and has a simple preparation process. The catalyst can efficiently catalyze synthesis of 2,5-furan dicarboxylic acid from 5-hydroxymethylfurfural under mild conditions. The target product has high yield and simple separation, and has a good industrial application prospect.

The present invention is directed to piezo photocatalytic process for the production of hydrogen from water, wherein the process comprises the steps of: (a) providing non-metal-doped barium titanate which includes at least one defect; (b) contacting the non-metal-doped barium titanate provided in step (a) with water to form a mixture; and (c) subjecting the mixture formed in step (b) to: (i) actinic radiation; and (ii) mechanical force, to produce hydrogen from the water, as well as non-metal-doped barium titanate and methods of production thereof.

This invention relates to the field of molecular sieves, specifically to a P-modified metal-doped MWW molecular sieve, its preparation method, and its applications. In this molecular sieve, A... Pδ‑7 / A P ≥50%, A Pδ‑7 represent 31 The peak area of ​​the P species signal peak at the terminal group with a P chemical shift of -7ppm ± 15ppm in the P MAS NMR spectrum, A P It represents 31 The peak area of ​​the total signal peak in the pMAS NMR spectrum. The molecular sieve of this invention has high activity, selectivity, and stability, and excellent resistance to carbon deposition.

A catalytic electrode includes a nickel-based porous base material, and a plurality of catalytic alloy balls of nickel and another metal doped with elements, in which the another metal includes iron, the elements include C, F, and S, and the catalytic alloy balls are dispersed on the surface of the nickel-based porous base material. The catalytic electrode also includes a plurality of metal phosphide particles covering the nickel-based porous base material and the catalytic alloy balls, and the metal phosphide particle includes nickel phosphide, nickel iron phosphide, nickel cobalt phosphide, nickel copper phosphide, or nickel zinc phosphide.

The invention discloses a two-dimensional carbon-based catalyst material as well as a preparation method and application thereof, and belongs to the technical field of catalyst preparation. The preparation method comprises the following steps: by taking aniline as a carbon source and a nitrogen source, initiating oxidative polymerization by ammonium persulfate in a perchloric acid solution containing a metal precursor to generate metal-doped polyaniline; and heating the polymer to induce an explosion reaction so as to realize rapid stripping and carbonization of polyaniline and finally obtain the two-dimensional carbon-based material. The method provided by the invention has the advantages of low initiation temperature, extremely short reaction time and remarkable energy-saving advantage, the obtained material shows excellent catalytic performance and good stability in various systems such as energy conversion and electro-catalytic synthesis as an electrode catalyst, and the preparation process is low in raw material cost, simple to operate, low in energy consumption, small in environmental pollution and suitable for industrial production. And the method has a good large-scale application prospect.

This invention discloses a method for preparing a metal-doped anode material with high closed-pore ratio, comprising the following steps: pre-oxidation, liquid-phase coating, isostatic pressing, metal doping, and carbonization. By using glucose to liquid-phase coat pre-oxidized biomass char, followed by isostatic pressing to form a dense and uniform composite carbon framework, the pores are predominantly closed pores of 0.4-2 nm, and the carbon layer is tightly bonded to the matrix without cracks. Furthermore, by gas-phase doping with zinc, zinc is uniformly dispersed in the form of single atoms / clusters and embedded in the carbon lattice, forming a unique Zn-C coordination structure without metal particle agglomeration defects. Simultaneously, the high temperature of 1400-1600℃ promotes the migration of zinc atoms into the carbon lattice depth, improving the microcrystallinity of the carbon material while retaining sodium storage active sites, resulting in stronger structural stability and ultimately achieving a high closed-pore ratio, thereby improving the capacity and rate performance of the anode material.

The invention provides a transition metal Fe doped vanadyl phosphate material and a preparation method thereof. Fe partially replaces V metal cations in crystal lattices, a local coordination environment and an electronic structure are adjusted, a stable Fe-O-P-O-V delocalized electronic structure is formed, and Zn < 2 + > intercalation / deintercalation reversibility and crystal lattice stability are optimized. Compared with the traditional VOPO4, the Fe-doped vanadyl phosphate material has the advantages that the V-O bond strength is obviously enhanced, the interplanar spacing is reduced, the dissolution of PO4 < 3 > and the fracture of a lattice structure are inhibited, the symmetry of a VO6 octahedron is obviously improved, and excellent circulation (the capacity retention ratio reaches 80% after 2000 times of circulation) and rate capability are shown. The preparation process is simple, low in cost, mild in reaction condition, high in yield and low in equipment dependence; the obtained positive electrode material is improved in capacity, enhanced in structural stability and improved in rate capability, and an innovative solution is provided for developing a high-stability aqueous ion battery positive electrode material.

An electroluminescent device, a method for manufacturing semiconductor nanoparticles, and a display device are provided. An electroluminescent device of an embodiment includes: a first electrode and a second electrode spaced apart from each other; and a light emitting layer disposed between the first electrode and the second electrode and including semiconductor nanoparticles configured to emit blue light having a peak emission wavelength of greater than or equal to about 440 nm and less than or equal to about 480 nm, the semiconductor nanoparticles including zinc, tellurium, selenium, and sulfur, the semiconductor nanoparticles also include a metal dopant, and the metal dopant includes aluminum, gallium, zirconium, hafnium, magnesium, or a combination thereof.

This invention discloses a method for preparing a highly coordinated sulfur-doped single-atom catalyst and its application, comprising the following steps: S1, mixing and stirring zinc nitrate hexahydrate, dimethylimidazole, hexadecyltrimethylammonium bromide, a metal source, and deionized water to obtain metal-doped ZIF-8; S2, heating the metal-doped ZIF-8 under an argon atmosphere to obtain an undoped metal single-atom catalyst; S3, preparing the undoped metal single-atom catalyst into a highly coordinated sulfur-doped metal single-atom catalyst; S4, adding the highly coordinated sulfur-doped single-atom catalyst to antibiotic wastewater for treatment; This invention avoids coordination in the first shell of the metal atom by mixing the single-atom catalyst and thiourea and performing a second pyrolysis, thereby forming a sulfur-doped highly coordinated single-atom catalyst.

A high-stability lithium-rich manganese-based positive electrode material, a preparation method therefor, and use thereof. The preparation method comprises the following steps: mixing a lithium-rich manganese-based positive electrode material to be modified and an ammonium salt containing a transition metal, and sintering to give an intermediate material; and performing water leaching treatment on the intermediate material to give the high-stability lithium-rich manganese-based positive electrode material. The preparation method synchronously allows for oxygen vacancies, transition metal doping, and lithium concentration gradient distribution on the surface of the lithium-rich manganese-based positive electrode material, thereby enabling the lithium-rich manganese-based positive electrode material to possess high rate performance, voltage attenuation suppression, and excellent long-term cycling stability. Moreover, the method is simple and low-cost, and has good repeatability, making it very suitable for large-scale production and facilitating the practical application of high-capacity and high-voltage materials in high-energy-density batteries.