170 results about "Surface oxygen" patented technology

The invention provides a Cu2O-based heterogeneous composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: coating the surface of a Cu2O hollow sphere substrate with a carbon layer, and depositing layered double hydroxides (LDHs) and metal palladium (Pd) nanoparticles on the carbon layer. According to the material, through a Cu2O-carbon layer-LDHs-Pd multistage heterostructure design, space optimization of light absorption, charge transfer and catalytic sites is realized; cu2O-carbon layer-LDHs interface coupling promotes directed migration of photo-induced electron-hole pairs, and the surface plasmon resonance effect of Pd nanoparticles enhances the charge separation efficiency; the LDHs optimizes a charge transfer path through surface oxygen vacancy or metal valence cycle, so that synergistic oxidation of non-free radicals and free radicals is realized, the organic matter degradation efficiency is remarkably improved, the oxidation path is widened, and the performance bottleneck of a single material is broken through.

The invention discloses a sodium metavanadate-based catalyst activity gradient regulation and regeneration system and method, and relates to the technical field of industrial catalyst regeneration, the sodium metavanadate-based catalyst is of a unique layered structure, the sodium metavanadate-based catalyst comprises an outer layer, a middle layer and an inner layer from the surface to the interior in sequence, and active components and doping elements of all the layers are different; the outer layer is doped with high-content sodium metavanadate and manganese oxide, reactant molecules can be quickly adsorbed and activated in the initial stage of the reaction, the manganese oxide can provide additional active sites, reduce reaction activation energy and promote quick start of the reaction, and the middle layer is doped with a proper amount of sodium metavanadate and cerium oxide, so that the reaction is more stable in the process of the reaction. The cerium oxide can adjust migration and conversion of oxygen species on the surface of the catalyst, optimize the reaction path, improve the selectivity of a target product and reduce side reactions, the inner layer is doped with the low-content sodium metavanadate and tungsten oxide, and the structural stability of the catalyst under high-temperature and long-time reaction is maintained by means of the high stability of the tungsten oxide.

Partially oxidized carbonaceous materials characterized by substantially homogenous, partially oxygenated surfaces thereof are enabled via microwave-assisted methods that are simple and fast. The exemplary methods include combining carbonaceous material(s), at least one mild oxidizer, at least one nucleophile, and an aqueous solvent system to obtain a mixture; and exposing the mixture to microwave radiation for a predetermined time to produce partially oxidized carbonaceous materials. The predetermined time may be in a range from about 5 seconds to about 2 hours, and the power of the microwave energy may be in a range from about 100 w to about 1700 W. The partially oxidized carbonaceous materials are characterized by a homogeneous distribution of oxygen content in surfaces thereof, in nonzero amounts up to about 10 at %, and a standard deviation of surface oxygen content in a range from about 0.1 at % to about 1.0 at %.

The invention belongs to the technical field of wire grinding, and particularly relates to a bare copper wire surface deoxidizing device and a using method thereof.The bare copper wire surface deoxidizing device comprises a grinding base and a control box installed at the top of the grinding base and further comprises a mounting plate, the mounting plate is fixedly installed on the side wall of the grinding base, and a plurality of oxidation detection units are inserted into the side wall of the mounting plate; each oxidation detection unit is used for detecting the surface roughness of the bare copper wire, the multiple insulation sleeves are fixedly inserted into the side wall of the polishing base, and a detachable mounting pipe is rotationally connected to the interior of each insulation sleeve. According to the device, the oxidation state and degree of the surfaces of the multiple bare copper wires can be monitored online in real time, the grinding time is automatically controlled based on the detection result, grinding piece abrasion is reduced, resource waste is reduced, the grinding efficiency is improved, meanwhile, grinding scraps can be rapidly collected, replacement of a loss piece is reminded in time, and the oxygen removal effect of the bare copper wires is prevented from being affected.

The application discloses a preparation method and application of PTFE catalytic filter material, and the preparation of the PTFE catalytic filter material comprises MnCeTi catalyst preparation, PTFE catalytic fiber preparation, heteropoly acid functionalization and needling. The three-dimensional flower-shaped spherical structure of the prepared PTFE catalytic filter material is used to optimize the mass transfer and conversion channel of pollutants, the intermetallic interaction of Mn, Ce and Ti is used to regulate the surface acid sites and active sites of the catalyst, the surface oxygen vacancies, acid sites and other characteristics are further optimized through the heteropoly acid functionalization, and the low-temperature catalytic dioxin performance of the PTFE catalytic filter material is effectively improved. Meanwhile, the heteropoly acid can form polyoxometalate on the surface of the catalyst, the adhesion strength of the catalyst and the filter material is strengthened, the loss problem of the catalyst in the use process is effectively relieved, and the prepared PTFE catalytic filter material has high efficiency and long-term use performance.

The invention provides a silicon-based negative electrode material and a preparation method and application thereof, and particularly relates to the field of negative electrode materials, the negative electrode material comprises an inner core and a coating layer coating the surface of the inner core, the inner core is composed of a porous carbon matrix and silicon nano-particles deposited in pore channels of the porous carbon matrix, the coating layer is a short-range ordered high-texture carbon layer, and the coating layer is a silicon nano-particle coating layer. The thickness of the high-texture carbon layer is 0.5-30 nm, the length-diameter ratio of the carbon lines is 1-10, and the interlayer spacing is 0.33-0.37 nm. According to the technical scheme, through the synergistic effect of the surface oxygen passivation layer and the high-texture carbon coating layer formed at a high temperature, silicon volume expansion is effectively inhibited, side reactions are reduced, and meanwhile the electrode conductivity and cycling stability are remarkably improved.

The invention relates to the technical field of lithium ion batteries, in particular to a nickel cobalt lithium manganate positive electrode material and a preparation method thereof. According to the invention, the technical problems of poor cycle performance and low specific capacity of the existing nickel cobalt lithium manganate positive electrode material are solved. The preparation method comprises the following steps: synthesizing precursor powder by adopting a coprecipitation process; then carrying out high-shear mixing on the precursor, lithium hydroxide, nano niobium oxide and magnesium fluoride; after the mixed material is subjected to pre-oxidation and high-temperature oxygen-enriched gradient sintering, a gradient reduction etching process is adopted in the cooling stage, and strong wind quenching is matched for surface shaping; and finally, carrying out air jet pulverization and demagnetization to obtain the nickel cobalt lithium manganate positive electrode material. According to the method, lattice respiration stress is effectively dissipated by constructing a radial ordered structure, a bulk phase structure is stabilized through multi-element synergistic doping, interfacial ion transport kinetics is optimized through reduction-induced surface oxygen vacancies and a lattice distortion layer, and the synergistic strategy ensures high stability of the material structure and meanwhile, the material structure has a good application prospect. And the de-intercalation efficiency of the active lithium is greatly improved.

The invention discloses high-purity nickel powder prepared from plant polyphenol through field flow control, a system and a method, a sulfonated tannic acid-gallic acid bio-based system is used as a reduction-stabilizer, and green and efficient preparation of nickel nano powder is realized through a multi-physical field synergistic effect of a three-stage gradient continuous flow reactor and double-frequency ultrasonic-pulse microwave-nitrogen bubbling. The total residence time of the reaction is 25.1-37.7 min, mother liquor is reused after being subjected to salt separation treatment (nanofiltration desalination of a NiSO4 system and ion exchange Cl removal of a NiCl2 system), and the wastewater discharge amount is greatly reduced compared with that of a traditional process; the surface oxygen content of the product is smaller than or equal to 0.9 wt%, the PDI is smaller than or equal to 0.15, the tap density is larger than or equal to 4.0 g / cm < 3 >, the GB / T 33828-2017 standard is met, the method can be used for the high-end field of lithium ion batteries and the like, and green industrial production of the nanometer nickel powder is achieved from the source.

This invention discloses a copper-tungsten oxide / zinc oxide heterojunction photocatalyst, its preparation method, and its application, belonging to the field of nanomaterials and photocatalysis technology. Firstly, a single-atom copper-modified plasma W-type photocatalyst is synthesized using a solution-thermal method combined with an impregnation-thermal reduction process. 18 O 49 Nanowires were first prepared; then porous ZnO nanosheets were prepared via a hydrothermal method combined with calcination; finally, single-atom copper-modified plasma W was constructed via electrostatic self-assembly. 18 O 49 Nanowire / porous ZnO nanosheet heterojunction composite material. This invention utilizes the above-described preparation method to prepare Cu-W nanowires with matched band structures. 18 O 49 / ZnO heterojunction can realize the photogenerated electrons of ZnO into the plasma Cu-W 18 O 49 Nanowire implantation stabilizes and increases the surface oxygen vacancy concentration and free electron density, thereby enhancing the surface plasmon resonance effect and promoting the continuous generation of high-energy hot electrons. Single-atom copper active sites and W 18 O 49 The synergistic effect of nanowires enables the enriched hot carriers to efficiently and selectively photocatalytically reduce CO2 to CH4.

An electrode which includes nanoparticles of a carbon-doped tin oxide of formula C—SnO2-x where x=is from 0.001 to 0.1, having surface oxygen vacancies. The electrode includes a fluorine-doped tin oxide substrate. A film of the nanoparticles is present on at least one surface of the fluorine-doped tin oxide substrate. The surface oxygen vacancies correspond to an O 1s peak shift of 0.5-2 eV in the X-ray photoelectron spectroscopy (XPS) for C—SnO2-x compared to C—SnO2 without surface oxygen vacancies.

The invention discloses a sodium ion battery hard carbon negative electrode material and a preparation method thereof, and belongs to the technical field of carbon material synthesis and electrochemistry. The hard carbon negative electrode material is prepared by carrying out pre-oxidation treatment, inert atmosphere pyrolysis, constant-speed cooling and crushing treatment on an animal hair generating substance material. According to the invention, the corresponding relationship among the interlayer spacing, the micropore number and the surface oxygen-containing groups of the animal hair generating substance fiber under the preoxidation-inert atmosphere temperature-changing pyrolysis, the sodium storage capacity and the cycling stability is determined; the rabbit hair-based hard carbon negative electrode prepared under the optimal condition realizes the sodium storage specific capacity of 265.30 mAh g <-1 > and the capacity retention ratio of 88.55% after 300 cycles under the current density of 50mA g <-1 >. The low-cost large-scale preparation scheme of the hard carbon negative electrode material, which can be industrially popularized, provided by the invention provides technical reference for industrial development of the sodium-ion battery.

The invention discloses a photochromic TiO2-PEG200 (Polyethylene Glycol 200) nano particle and an application of the photochromic TiO2-PEG200 nano particle in photocatalytic oxidation of a C-H bond. The catalyst is synthesized through a solvothermal method, PEG200 is used as a solvent and a modifier, and self-doped Ti < 3 + > and surface oxygen vacancies are introduced into TiO2. Under the irradiation of blue light (405nm), the catalyst generates a photochromic effect, Ti < 4 + > is reduced into high-concentration Ti < 3 + > in situ, and meanwhile, a large amount of superoxide free radicals (O < 2 + >) are generated. A photo-generated hole directly activates an ethylbenzene alpha-C-H bond to generate a benzyl free radical, and the benzyl free radical reacts with a superoxide free radical (O2.) and is finally converted into acetophenone. The catalyst has excellent visible light response and charge separation efficiency, and the acetophenone yield is up to 56 mmol.g <-1 >. H <-1 > and is 10 times that of traditional TiO2. The reversible circulation of Ti < 3 + > / Ti < 4 + > enables the catalyst to maintain good stability, and the activity is still maintained at 95% or above after five times of circulation. The operation conditions are mild (room temperature and normal pressure), a strong oxidant is not needed, an efficient, stable and environment-friendly photocatalysis solution is provided for C-H bond activation, and the method has important application value in the field of fine chemical synthesis.

The application provides a lithium supplement additive and a preparation method and application thereof. The lithium supplement additive comprises a lithium-rich material, and the lithium-rich material is a lithium-rich oxide. The particle structure of the lithium-rich material comprises a central region and a surface layer region arranged in sequence from inside to outside. The surface layer region contains first oxygen vacancies, and the concentration of the first oxygen vacancies gradually decreases from the side close to the central region to the side far from the central region. The lithium supplement additive provided by the application comprises a lithium-rich material, and the lithium-rich material comprises a central region and a surface layer region. In the surface layer region, the concentration of oxygen vacancies gradually decreases from inside to outside. The arrangement can effectively reduce the diffusion of surface oxygen vacancies to the inside and the structural instability and continuous oxygen and gas production caused thereby, and can also reduce the occurrence of electrolyte side reactions, thereby reducing gas production.

The application discloses a preparation method of a lightweight oxidation-resistant coating on a carbon-based composite material surface, which comprises the following steps: brushing a slurry containing a carbon source on the surface of the carbon-based composite material, solidifying, forming a carbon source transition layer on the surface of the carbon-based composite material, and then performing a molten salt assisted infiltration treatment on the surface of the carbon source transition layer to obtain the lightweight oxidation-resistant coating. The preparation method of the application provides the carbon source for the subsequent process by pretreating the carbon-based composite material, and adds a suitable reinforcing phase to improve the bonding force between the coating and the substrate. Then, the molten salt disproportionation reaction is used to prepare the coating, the thickness and microstructure of the coating are strictly controlled by controlling the infiltration process, and finally, the smooth, uniform and dense lightweight oxidation-resistant carbide ceramic sealing layer is obtained. In the oxidation process, a glassy film is formed to seal the surface oxygen diffusion channel, the short-term ablation resistance is excellent, and the lightweight high-strength requirement of aerospace vehicles can be met.

The application discloses a gradient nickel oxide film and a preparation method and application thereof, and comprises the following steps: first, vacuumizing a reaction chamber, then putting a target material into the reaction chamber, inputting argon, and starting illumination, wherein the target material is a pure nickel target; then inputting oxygen, gradiently adjusting the oxygen content, adopting a reaction magnetron sputtering method to deposit sputtering on the target material in an argon and oxygen mixed gas atmosphere, setting sputtering power and deposition time, and obtaining the gradient nickel oxide film with gradiently changed surface oxygen content; compared with an existing chemical deposition method, the preparation method is stable in process and stable in component, the obtained nickel oxide film has a thickness of 10 nm, small crystal grains make the film have the best conductivity, the film can not only block the electrons in the absorption layer from going to a bottom electrode ITO layer, but also can guide away holes due to the good conductivity, so that invalid recombination is reduced, and finally the battery efficiency is improved.

This invention discloses a low-vacuum laser welding device for medium-thick aluminum alloy plates, belonging to the field of metal welding technology, aiming to solve the problems of prominent porosity defects and insufficient mechanical properties in the welding of medium-thick aluminum alloy plates. The device consists of a laser cleaning and oscillating welding integrated module, a low-vacuum welding chamber module, a control system, and a detection module. The laser cleaning module uses a pulsed fiber laser to remove the oxide layer at an optimal energy density of 13.24 J / cm² under nitrogen protection, reducing the surface oxygen content to 9.66%. The low-vacuum welding chamber module constructs a negative pressure environment of 10²-10³ Pa to suppress plasma plumes. The oscillating laser welding module optimizes the stirring of the molten pool by achieving circular oscillation with a frequency of 80 Hz and an amplitude of 1 mm. The control system coordinates and regulates the parameters of each module, and the detection module monitors the weld quality in real time. This device reduces the weld porosity to below 0.032% and the tensile strength to 388.62 MPa (83.16% of the base material), making it suitable for welding medium-thick aluminum alloy plates for aerospace applications.

The invention belongs to the technical field of selective catalytic reduction, and particularly relates to a preparation method of a CeO2-CuNi0. 5Mn1. 5O4 composite catalyst and application of the CeO2-CuNi0. 5Mn1. 5O4 composite catalyst in stable CO-SCR denitration in an aerobic environment. The CeO2-CuNi < 0.5 > Mn < 1.5 > O < 4 > composite catalyst synthesized by a solution-gel method can be applied to the field of CO-SCR (selective catalytic reduction). Compared with an existing catalyst, the CeO2-CuNi0. 5Mn1. 5O4 composite catalyst has the advantages that the number of surface active sites is large, richer surface oxygen vacancies are provided, a CeO2 fluorite structure serves as a rigid framework to inhibit spinel phase grain aggregation, spinel phase compact crystal lattices lock metal ions, XRD crystal phases are not obviously changed before and after the reaction, the structural stability is remarkable, and the catalyst is suitable for industrial production. And the catalyst still has excellent CO-SCR performance in an aerobic environment.

The invention relates to the field of lithium primary batteries, in particular to an all-weather double-high lithium / carbon fluoride battery as well as a preparation method and application thereof. According to the invention, mixed acid pretreatment is carried out on the surface of CFx, an oxygen-containing functional group is introduced for surface oxygen modification, and the components of a discharge product are obviously changed through the design of a low-melting-point electrolyte, so that the lithium / carbon fluoride primary battery which can be used in all weathers is designed. The technical problems that a traditional Li / CFx primary battery electrolyte is high in melting point, high in viscosity, slow in ion transport kinetics at low temperature, high in electrode / electrolyte interface resistance and the like are solved, and the energy density and the power density of the Li / CFx primary battery in a wide temperature range are comprehensively improved. The preparation process of the electrolyte is simple, the yield is high, and the electrolyte is suitable for large-scale production and has a wide application prospect.

The application belongs to the technical field of organic solid waste resource utilization and high-value conversion, and specifically discloses a dual-phase rare earth metal-based high-entropy oxygen carrier for waste plastic gasification, a preparation method and application thereof. a Ni b Co c Mg d M e O y , wherein a, b, c, d and e are respectively 5% to 35% of atomic percentage, a+b+c+d+e=100% is satisfied, M is a rare earth metal Ce or La, and y is in the range of 0 to 4 but not 0. The dual-phase structure formed after the introduction of the rare earth metal enhances the surface oxygen vacancy content of the oxygen carrier, is beneficial to the migration of the lattice oxygen to participate in the gasification reaction, the high-entropy oxygen carrier lattice is distorted, the metal-oxygen bond is weakened, and then the oxygen release capacity is promoted, the catalytic cracking capacity for waste plastics is improved, and the syngas yield and the oxygen carrier circulation stability are improved. The preparation method of the oxygen carrier is simple, can be widely used in the field of waste plastic gasification, and has high use value.

The invention belongs to the technical field of organic solid waste recycling and high-value conversion, and particularly discloses a double-phase rare earth metal-based high-entropy oxygen carrier for waste plastic gasification and a preparation method and application of the double-phase rare earth metal-based high-entropy oxygen carrier. The oxygen carrier has a general formula of FeaNibCocMgdMeOy, a, b, c, d and e respectively account for 5%-35% of atoms, a + b + c + d + e = 100%, M is rare earth metal Ce or La, and y ranges from 0 to 4 but is not 0. The content of surface oxygen vacancies of the oxygen carrier is increased by a biphase structure formed after introduction of the rare earth metal, lattice oxygen migration is facilitated to participate in gasification reaction, lattice distortion of the high-entropy oxygen carrier occurs, metal-oxygen bonds become weak, oxygen release capacity is further promoted, catalytic cracking capacity on waste plastics is improved, and the catalytic cracking efficiency of the high-entropy oxygen carrier is improved. The yield of the synthesis gas and the cycling stability of the oxygen carrier are improved. The oxygen carrier disclosed by the invention is simple in preparation method, can be widely applied to the field of waste plastic gasification, and has relatively high use value.

The invention discloses a catalytic oxidation synthesis method for acid spices. The method specifically comprises the following steps: S1, filling a catalyst; s2, carrying out reaction initialization; s3, raw material injection; s4, separating and purifying a product; the invention relates to the technical field of perfume synthesis. According to the catalytic oxidation synthesis method of the acid perfume, magnetism is given to the catalyst through a Fe3O4 magnetic core, second-level separation is achieved through an external magnetic field after reaction, the recovery rate is increased, the production cost is reduced, the mesoporous CeO2 carrier provides high-dispersion active sites, the surface oxygen vacancy density is high, alcoholic hydroxyl groups are directly oxidized through photo-generated holes, and O2-free radicals are generated through electron transfer, so that the catalytic oxidation synthesis of the acid perfume is achieved. According to the method, the oxidation path of conversion from C = O to COOH is accurately regulated and controlled, a guarantee is provided for improving the product purity, the reaction time is shortened in cooperation with light-heat-magnetic multi-field coupling, the production efficiency of the product is improved, meanwhile, precious metal is prevented from being used, and good environment friendliness is achieved.

This invention discloses the application of a carbon-modified noble metal catalyst in the low-temperature combustion of propane or mixed alkanes. The carbon-modified noble metal catalyst is prepared by adding sodium hydroxide solution dropwise to a cerium salt solution, mixing, and reacting to obtain a cerium dioxide support. The cerium dioxide support is then impregnated in an equal volume of noble metal salt solution, dried, and calcined. The calcined product and glucose are added to deionized water, mixed, and subjected to a hydrothermal reaction, followed by drying and calcination to obtain the final product. In this invention, carbon species exist in the form of doping or interstitial filling, inducing lattice distortion and a high concentration of surface oxygen vacancies in the support, significantly improving the mobility of lattice oxygen and the reactivity. Simultaneously, the interfacial carbon species optimize the microelectronic environment of the active center through strong electron interactions, maintaining the low valence state of Ru and the metallic states of Pt and Pd. This catalyst effectively avoids the shielding effect of the carbon layer and exhibits excellent catalytic combustion activity and stability for propane and mixed alkanes at low temperatures.

The invention provides the double-electric-layer capacitor electrolyte with high energy density and cost advantages, the additive of the electrolyte contains small cations to increase the degree of freedom of salt ions and reduce the viscosity, and the anion part contains hydrophobic groups and oxyphilic groups of oxyphilic functional groups on the surface of activated carbon to reduce the contact between water molecules and an electrode interface, so that the service life of the double-electric-layer capacitor is prolonged, and the service life of the double-electric-layer capacitor is prolonged. And furthermore, the gas production rate of the electrolyte is reduced, the high-rate performance is adapted, the capacity exertion is increased, and the characteristic of low cost is compatible. The capacity retention rate of an EDLC battery cell containing the preferable additive is increased to 78.2% (19.3%) from 58.9% of a blank sample after 1000 circles of 125A large-current circulation (the current of a conventional application scene of the capacity battery cell is 25A), the capacitance retention rate is increased to 78.2% (19.3%) from 58.9% of the blank sample after 1500h of high-temperature floating charge at the voltage of 65DEG C and 2.9 V, and the internal resistance growth rate is increased to 78.2% (19.3%) from 58.9% of the blank sample. According to the present invention, the preferable additive can significantly improve the capacity, such that the injection amount of the cell electrolyte can be reduced so as to reduce the production cost on the premise of maintaining the capacity unchanged, the safety is high, the process change is small, the electrochemical performance is significantly improved, and the commercialization requirement can be well met.

A high-temperature stable titanium-based heterogeneous catalyst and its preparation method belong to the technical field of titanium catalysts. The present invention introduces silica sol modification in the carrier pretreatment stage, uses SiO2 to block the oxygen vacancies on the surface of YSG to enhance the hydrothermal stability; combines citric acid to Ti 4+ / Ce 3+ The chelation effect of the cerium layer achieves bimetallic co-dispersion, eliminating competitive adsorption. Finally, long-term heating at 750°C stimulates the directional migration of cerium to titanium grain boundaries, constructing a nanoscale pinning network. This fundamentally addresses the three major challenges of abnormal titanium grain growth, support structure degradation, and active component mismatch at high temperatures.

The inventions relate to olefin polymerization processes. The invention describes: compounds that act as solid activating supports; catalysts; and catalytic compositions containing olefin polymerization catalysts that comprise said solid activating supports having the formula (I): support - O - A. In the compounds expressed by this formula, the support is a solid substrate of an inorganic oxide, and A is a polyfluorinated functional group bound to an oxygen atom on the substrate surface and having the general formula: [C(R1 ) (R2 )-O-MLn]z+ (Cty+ )z / y (II), where M is selected from the group consisting of an atom of aluminium, gallium, boron, a group 3 transition metal, and lanthanide; L is a ligand; n is 2, 3 or 4; z is 0 or 1, and Cty+ is a cation capable of converting a neutral transition metal complex into a cationic complex capable of catalyzing olefin polymerization, with a charge y, where y is 1 or 2. The invention makes it possible to use olefin polymerization catalysts on solid supports in suspension processes and gas-phase processes, thereby producing polyolefins in the form of powders having a narrow particle size distribution and a high bulk density.

The application provides an oxygen vacancy surface doped manganese-based lithium supplementing agent, a preparation method and application thereof, and belongs to the field of lithium ion battery lithium supplementing materials. The manganese-based lithium supplementing agent is treated by using a plasma treatment method, the concentration, depth and gradient distribution of oxygen vacancies on the surface of the manganese-based lithium supplementing agent are controlled by adjusting the type of gas, plasma power, treatment temperature and treatment time, the surface stability of the lithium supplementing agent is improved by controlling the surface doping of oxygen vacancies, and the surface oxygen precipitation and surface side reactions are inhibited. The preparation method is simple and low in cost, the physicochemical properties of the manganese-based lithium supplementing agent can be effectively improved, and the manganese-based lithium supplementing agent has important application prospects in lithium ion batteries.

The invention relates to a method for recovering nitrogen and phosphorus in biogas slurry based on high-purity cellulose carbon, and belongs to the technical field of biogas slurry purification and nitrogen and phosphorus recovery. In order to solve the problem of insufficient adsorption capacity of the existing activated carbon for recovering the nitrogen and the phosphorus in the biogas slurry, the invention provides a method for recovering the nitrogen and the phosphorus in the biogas slurry based on high-purity cellulose charcoal, which comprises the following steps: preparing the high-purity cellulose charcoal, modifying the high-purity cellulose charcoal and recovering the nitrogen and the phosphorus in the biogas slurry. According to the method, high-purity cellulose of the corn straw is reserved through pretreatment, a synergistic modification scheme of sulfuric acid-oxalic acid combined acid pre-etching activation and magnesium sulfate loading is adopted, biochar pore blockages are effectively removed, surface oxygen-containing functional groups are enriched, and magnesium loading uniformity and immobilization strength are improved; the capability of adsorbing and recycling ammonia nitrogen and phosphorus in the biogas slurry is obviously enhanced. According to the invention, resource utilization of agricultural wastes is realized; the modified biochar can be used as a slow-release fertilizer or a soil conditioner after adsorbing nitrogen and phosphorus, so that nutrient circulation is completed, and the biochar has both environment-friendly and economic values.

An aerosol-generating substrate reservoir (103) for use in an aerosol-generating system (200) is described. The aerosol-generating system (200) may be a personal aerosol-generating system, such as an electronic vaping system, configured to deliver an aerosol to a user. The aerosol-generating substrate reservoir (103) comprises a porous element, the porous element comprising activated carbon. The porous element has a surface oxygen concentration (Ototal) of at least 3 wt% when measured using temperature programmed desorption. The aerosol-generating substrate is sorbed in the porous element. The aerosol-generating substrate may comprise at least one of glycerol, nicotine, water, and an acid. An aerosol-generating system (200) comprising an aerosol-generating substrate reservoir (103) and a method of making an aerosol-generating substrate reservoir are also described.

The application discloses a kind of sodium ion battery hard carbon negative electrode material and preparation method thereof, belong to carbon material synthesis and electrochemistry technical field.The hard carbon negative electrode material is the material of animal hair biological substance after being prepared by pre-oxidation treatment, inert atmosphere pyrolysis, uniform speed cooling and crushing treatment.The application determines the corresponding relationship between the interlayer spacing, micropore quantity and surface oxygen-containing group of animal hair biological substance fiber under pre-oxidation-inert atmosphere temperature pyrolysis, sodium storage capacity and cycle stability, and the hard carbon negative electrode based on rabbit hair prepared by optimal condition realizes 265.30mAh g ‑1 The sodium storage specific capacity of 50mA g ‑1 Current density is 300 cycles after 88.55% capacity retention rate.The low-cost large-scale preparation scheme of hard carbon negative electrode material proposed by the application can be industrialized and popularized, which provides technical reference for the industrialization development of sodium ion battery.

The invention discloses a method for constructing a defect interface in a metal oxide by using a photo-thermal coordination strategy and a product thereof. The method comprises the following steps: realizing energy collaborative supply of catalyst synthesis and defect construction by utilizing a photo-thermal collaborative strategy of focusing solar radiation through a Fresnel lens. The precursor is quickly converted into a metal oxide at high temperature of focused solar radiation, electron transition of the metal oxide is excited by ultraviolet light, metal-oxygen bonding is selectively weakened through electron-hole interaction, and surface oxygen desorption is driven to form a defect enrichment layer; meanwhile, a local high-temperature field (400-450 DEG C) triggers lattice reconstruction kinetics and induces metastable oxide to be converted into a thermodynamic stable phase. According to the invention, a plurality of metal oxides (including Co3O4, CuO, NiO, MnO and NiCoMnO) are successfully converted into a multi-phase / single-phase structure rich in defects.