89results about How to "Increase contact points" patented technology

The invention relates to the field of lithium batteries, and especially relates to a high-capacity, high-compaction and quick-charge composite graphite negative electrode material. Artificial graphiteand natural graphite single particles are tightly anchored together through amorphous carbon to form a composite graphite secondary particle structure, and a layer of amorphous carbon is applied between the artificial graphite and the natural graphite particles and on the surface of each component particle in a coating manner. The defect that a graphite negative electrode material developed in the prior art cannot give consideration to high capacity, high compaction or quick charging performance is overcome, the advantages of the natural graphite are utilized to ensure the high capacity and high compaction performance of the material, meanwhile, the natural graphite is compounded with the artificial graphite with partial isotropy to buffer the expansion of the natural graphite, and the layer of amorphous carbon is formed between the artificial graphite and the natural graphite particles and on the surface of each single particle, so that the migration rate of lithium ions between thesurface of the graphite and different graphite is increased while the surface defects of the natural graphite are improved.

The invention discloses a preparation method of an indium zinc sulfide/bismuth vanadate composite material. The preparation method comprises the following steps: (1) mixing zinc chloride, indium chloride tetrahydrate and thioacetamide with water and glycerol, and stirring until the obtained mixture is uniformly dispersed; and (2) adding decahedral bismuth vanadate into the obtained mixed solution,stirring, and preparing the indium zinc sulfide/bismuth vanadate composite material by using a low-temperature solvothermal technology. The invention also discloses the indium zinc sulfide/bismuth vanadate composite material prepared by the method, and an application of the indium zinc sulfide/bismuth vanadate composite material as a photocatalyst in the field of new energy. The indium zinc sulfide/bismuth vanadate composite material has a very good catalytic effect on hydrogen production by photolysis of water, and can be repeatedly utilized for multiple times; and the composite material hasthe advantages of simple preparation process, easiness in recycling and the like, and has a wide application prospect in the field of new energy.

The invention discloses a method for preparing a monophenol compound through catalyzing degradation of lignin by using an ammino-complex. The method comprises the steps: adding the lignin, a metal salt, ammonia water, a peroxidant, an alkali and deionized water into a high-pressure reaction vessel, and carrying out stirring to form a uniform solution; carrying out a reaction for 100 to 240 minutes at the temperature of 120 DEG C to 180 DEG C, and carrying out cooling; and adjusting the pH value of a reaction solution to 2 to 3 with an acid, then, carrying out a reaction for 10 to 20 minutes at the temperature of 100 DEG C to 120 DEG C, carrying out cooling, then, carrying out filtration to collect filtrate, carrying out extraction on the filtrate with dichloromethane, separating an organic phase, and carrying out drying with anhydrous calcium chloride, thereby obtaining a monophenol compound mixed solution. According to the method, a stable ammino-complex solution is formed by using the metal salt and the ammonia water under alkaline conditions, so that the number of sites of contact between a catalyst and the lignin can be effectively increased compared with that in the conventional lignin oxidative degradation method; the degradation of the lignin can be efficiently catalyzed in an aqueous solution under moderate reaction conditions; and the method has the characteristics of high efficiency and low cost and is applicable to large-scale industrial production.

The invention provides a molybdenum disulfide/indium hydroxide composite air-sensitive sensing material as well as a preparation method and application thereof. According to the molybdenum disulfide/indium hydroxide composite air-sensitive sensing material, the problems that an existing sensitive material for detecting NOx is high in working temperature requirement, low in sensitivity, poor in selectivity and long in recovery time are solved. The composite air-sensitive sensing material is prepared from MoS2 and indium salt. The preparation method comprises the following steps: (1) weighing the raw materials; (2) dissolving the weighed raw materials, so as to obtain mixed liquid; (3) carrying out hydrothermal reaction on the mixed liquid; (4) washing solid products; (5) preparing MoS2 suspension liquid; (6) preparing reaction liquid; (7) carrying out hydrothermal synthesis reaction on the reaction liquid; and (8) sequentially washing and drying solid products. The composite air-sensitive sensing material used as a sensitive material for preparing air-sensitive elements. The composite air-sensitive sensing material is high in sensitivity, outstanding in selectivity and low in cost. The composite air-sensitive sensing material is suitable for being applied to the preparation of air-sensitive sensing materials and air-sensitive elements.

The invention belongs to the technical field of energy storage materials and particularly relates to preparation and application of a nickel-based three-dimensional graphene/manganese dioxide composite material. The preparation method includes steps that foamed nickel serves as a template, an organic carbon source serves as a raw material, graphene grows on the foamed nickel in situ through a chemical vapor deposition method, and nickel-based three-dimensional intercommunicated network structure graphene is prepared; nickel-based three-dimensional intercommunicated network structure graphene is taken as a conductive substrate, in-situ growth of manganese dioxide on a surface of the conductive substrate is performed by utilizing a hydrothermal reaction method to prepare a nickel-based three-dimensional intercommunicated network structure graphene/manganese dioxide composite material in a wet state, washing with the water is performed to be neutral, and freeze drying is performed to obtain the nickel-based three-dimensional intercommunicated network structure graphene/manganese dioxide composite material. The nickel-based three-dimensional graphene/manganese dioxide composite material is used as a working electrode of a supercapacitor.

The invention discloses an MoS2/schwertmannite Fenton composite catalyst, and a preparation method and application thereof, and belongs to the field of water treatment. The structure of the compositecatalyst is as follows: MoS2 with a lamellar structure is distributed on the surface of sphere-shaped schwertmannite. In an X-ray diffraction (XRD) pattern of the catalyst, characteristic diffractionpeaks of schwertmannite exist at positions of 26.26 degrees, 35.16 degrees, 46.53 degrees and 61.34 degrees, and characteristic diffraction peaks of MoS2 exist at positions of 14.38 degrees, 32.67 degrees, 35.87 degrees, 39.53 degrees, 49.79 degrees, 58.33 degrees and 72.79 degrees. The composite catalyst can accelerate circulation of Fe<3+>/Fe<2+> in a Fenton-like oxidation reaction under illumination and light-shielding states, and oxidation reaction efficiency is promoted. The invention further provides the preparation method of the catalyst and application of the catalyst in the field of wastewater treatment.

The invention discloses a composite catalyst of MoS2/defective MIL-100 (Fe) and a preparation method and application thereof. According to the composite catalys, MIL-100 (Fe) grows on MOS2 in situ toobtain a MoS2/MIL-100 (Fe) material, the MoS2/MIL-100 (Fe) material is activated at a high temperature to obtain the composite catalyst, the composite catalyst is formed by bonding MOS2 and MIL-100 (Fe), and the mass ratio of MOS2 to MIL-100 (Fe) is 0.2-0.8: 1. According to the composite catalyst, the reduction effect of Mo < 4 + > is utilized; meanwhile, the iron-based active component exposed bythe defective MIL-100 (FE) is utilized, good physicochemical properties of MoS2 and the defect type MIL-100 (Fe) are considered at the same time; a favorable way is provided for diffusion of pollutant molecules and H2O2 molecules in a Fenton-like system; the defect that the promotion effect of MoS2 composite catalysts on Fenton-like compounds in the prior art needs to depend on light conditions is overcome, the oxidation reaction promotion efficiency is improved, the pH application range is wide, and good catalytic degradation performance is still kept under the neutral pH condition.

The invention discloses an application of a house rubbish compound bactericide in the aspect of improving the mineral nutrition requirement in a lawn plant body. Three strains namely, bacillus subtilis, actinomycete and saccharomycete are diluted by 100-200 times so as to form the compound bactericide, wherein the volume ratio of bacillus subtilis to actinomycete to saccharomycete is 1: 1: 1. After the compost compound microorganism bactericide is sprayed, the variation tendencies of a large amount of elements (Na, K, Ca and Mg) are the same basically along with the increase of dilution multiple of the bactericide, and the influences of the compost compound microorganism bactericide on lawn plant growth due to host plant varieties and environment factors are obviously different, which is beneficial to absorption and utilization of the lawn plants on mineral elements.

The invention discloses a preparation method of a catalyst for visible light-ozone synergistic catalysis and the catalyst prepared by the preparation method. The preparation method of the catalyst comprises the following steps of: preparing an active component ZnO-g-C3N4 and preparing the reduced graphene hybrid ZnO-g-C3N4 aerogel. By forming a Z-type heterojunction powder catalyst material ZnO-g-C3N4 from g-C3N4 and ZnO and loading the powder catalyst material ZnO-g-C3N4 onto a graphene gel framework with a three-dimensional structure, the obtained reduced graphene hybrid ZnO-g-C3N4 aerogel catalyst has excellent degradation efficiency on organic pollutants under visible light-ozone synergistic catalysis, and meanwhile, rapid and efficient separation and recovery of the catalyst are realized, so that the prepared catalyst has excellent cycling stability activity.

The invention discloses a preparation method of conductive silver paste applied to a ceramic filter. The method comprises the following steps: adding potassium halide, aluminum sulfate, polyvinylpyrrolidone and silver nitrate into ethylene glycol, and reacting to generate nano-silver rods; preparing a first dispersion liquid which is an ethanol dispersion liquid or a mixed dispersion liquid of nano-silver rods, a high-boiling-point organic solvent is added, ethanol is distilled under reduced pressure, then lead-free glass powder and a thickening agent are added, and the conductive silver pasteis obtained. According to the invention, the conductive silver paste is prepared by using the nano silver rods with small diameter and large length-diameter ratio and a nano silver sheet with small particle size to replace micron-sized silver powder with large particle size, so that the adhesive force and conductivity of the conductive silver paste are increased, the sintering temperature is reduced, the finally formed conductive layer is more compact, and the resistance of the conductive layer is favorably reduced; the conductive silver paste provided by the invention does not contain lead,is lower in sintering temperature, smaller in resistance and higher in adhesive force, and has the advantages of environmental protection and low cost.

The invention provides a negative pole piece, a preparation method thereof and a lithium ion secondary battery comprising the negative pole piece. A negative active material layer in the negative polepiece comprises a negative active material, a first conductive agent, a first binder, a first thickener and gel particles, wherein the gel particles have a certain swelling property and a good electrolyte adsorption effect, and meanwhile, the conductive agent contained in the gel particles can ensure a conductive network in the negative pole piece and ensure ion conductivity and electron conductivity among the particles in the negative active material layer. The negative pole piece can solve the problem of low electrolyte retention capacity of the pole piece under high compaction density, andis beneficial to improving the long cycle performance of the battery. The negative pole piece provided by the invention can improve the electrolyte retention amount of the negative pole piece under high compaction density and improve the cycle performance of the battery.

The invention discloses a preparation method of a nano carbon material composite resin hard carbon electrode material. The preparation method comprises the steps of preparing a phenolic aldehyde mixed solution; adding a dispersed aqueous solution of a nano carbon material into the phenolic aldehyde mixed solution to obtain a uniformly dispersed mixed solution; then adding an alkaline substance catalyst to obtain a reaction solution; heating the reaction solution at constant temperature in vacuum to obtain composite phenolic resin hydrogel; performing freeze drying on the composite phenolic resin hydrogel to obtain composite phenolic resin aerogel; crushing the composite phenolic resin aerogel, and carbonizing at low temperature to obtain composite resin carbon aerogel; performing high-temperature treatment on the composite resin carbon aerogel to obtain a composite resin hard carbon material; and uniformly mixing the composite resin hard carbon material, PTFE and ethanol to obtain the nano carbon material composite resin hard carbon electrode material. According to the invention, the phenolic resin source hard carbon is used as an active material main body, the production cost is low, and an aqueous reaction system is adopted, so that the method is environment-friendly and pollution-free.

The invention belongs to the field of magnetic composite photocatalytic materials, and in particular relates to a ZnFe2O4/Bi7O9I3 magnetic composite photocatalytic material and a preparation method thereof. The preparation method comprises the following steps of: firstly, inserting ZnFe2O4 magnetic nanoparticles into a micron-sized flower-like structure formed by Bi7O9I3 nanosheets to form a composite structure in which particles are inserted into micron flowers; wherein the size of the ZnFe2O4 nanoparticles is 20-80nm, the thickness of the Bi7O9I3 nanosheet forming the Bi7O9I3 micron flowersis 5-10nm; ZnFe2O4 and Bi7O9I3 are compounded according to a mass ratio of 1:(2-6), the formed magnetic composite photocatalytic material shows superparamagnetism, is high in saturation magnetizationintensity, strong in photocatalytic activity and strong in magnetic separability, has good visible light degradation capability on a target pollutant bisphenol A, and can be quickly recycled through an external magnetic field to achieve the purpose of recycling for multiple times; and the preparation method of the magnetic composite photocatalytic material is reliable in principle, simple, easy tocontrol, green, safe, free of high-temperature calcination, conventional in equipment and low in cost, and has the industrial prospect of large-scale production.

The invention discloses a preparation method of a high-performance Alk-Ti3C2/PDMS flexible piezoresistive sensor. The method comprises the following steps of: preparing a PDMS flexible film with a structured flexible substrate, synthesizing a conductive material two-dimensional MXene sheet (Ti3C2Tx) and a 3D wrinkle-shaped Alk-Ti3C2, then preparing an Alk-Ti3C2/PDMS conductive film, and finally, assembling the Alk-Ti3C2/PDMS conductive film and a flexible interdigital electrode together through glue to obtain the flexible piezoresistive sensor. According to the invention, an abrasive cloth isused as a template, so that the structured PDMS film is effectively obtained, and the pressure range of the sensor is widened; according to the invention, NaOH is utilized to optimize the structure ofthe two-dimensional material Ti3C2Tx, so that the stacking phenomenon of the material is effectively prevented, a unique wrinkle-shaped structure is obtained, and the sensitivity of the sensor is improved; the preparation method provided by the invention is simple, feasible and easy to operate, and the application field of the Ti3AlC2 ceramic material nano material is widened.

The invention discloses a polypeptide mixture with oxidation resistance and DPP-IV (Dipeptidyl Peptidase IV) inhibitory activity. The amino acid sequences of the polypeptide mixture comprise HLVDEPQNLIK, DDQNPHSSN and DDEVDVDGTVEEDLGK. The polypeptide mixture is derived from whey protein. The preparation method of the polypeptide mixture comprises the following steps: step 1, carrying out ultrahigh-pressure treatment on a whey protein isolate solution with the concentration of 1% to obtain an ultrahigh-pressure whey protein isolate solution; step 2, adjusting the pH value of the ultrahigh-pressure whey protein isolate solution in the step 1 to 2.0-3.0, adding pepsase and acid protease, carrying out heating hydrolysis and enzyme deactivation, carrying out centrifugation to obtain a supernatant, and carrying out freeze drying after rotary evaporation to obtain a polypeptide mixture crude product; and step 3, adjusting the concentration of the polypeptide mixture crude product to 1mg/mL, and separating and purifying the polypeptide mixture crude product by adopting gel filtration chromatography and RP-HPLC. The polypeptide mixture disclosed by the invention is high in oxidation resistance and DPP-IV inhibitory activity, simple in preparation process, easy to operate, environment-friendly and pollution-free.

The invention belongs to the field of waste water treatment, and particularly relates to a carbon material supported palladium catalyst, as well as a preparation method and application thereof. The preparation method comprises the steps of mixing a biomass material and a palladium salt solution, adjusting pH to be alkaline, and carrying out hydrothermal reaction after mixing so as to obtain a hydrothermal reaction product; then carrying out solid-liquid separation on the hydrothermal reaction product to obtain a solid phase, drying the solid phase, and carrying out heat treatment to obtain a carbon-supported palladium catalyst; correspondingly obtaining the carbon material supported palladium catalyst with large specific surface area, high contact efficiency and high reaction activity, sothat the technical problems of higher palladium catalyst cost, less reaction sites, low oxidant contact efficiency, low reaction efficiency, difficulty in reusing the catalyst and the like in an existing advanced oxidation technology are solved.