39results about How to "Process parameters are easy to adjust" patented technology

The invention relates to a method for preparing Al mixed with ZnO nanosheet array by adopting a pulsed electromagnetic field, which is as follows: an FTO conductive sheet glass is placed in an ultrasonic cleaner for cleaning; the mixed solution I of zinc acetate, ethanol amine and ethylene glycol monomethyl ether is dripped on the conductive sheet glass, and is uniformly coated through a spin coater and heat treated to form a ZnO film thereon; the FTO conductive sheet glass coated with the ZnO film is put into a reaction kettle, the mixed solution II formed by aluminium nitrate, zinc nitrate and hexamethylene tetramine as well as deionized water is filled into the reaction kettle, the pulsed electromagnetic field treatment is applied to the reaction system in the reaction kettle, the kettle is moved to a constant temperature oven for hydrothermal reaction after the treatment, and the sediment on the surface of the glass is washed and dried after the hydrothermal reaction, so as to obtain the Al mixed with ZnO nanosheet array. The method is simple to operate, has low energy consumption, enables the orientation of the nanosheets to be identical, has higher verticality, enables the nanosheets to be neatly arrayed, has big specific surface area, facilitates electron transport when serving as the photoanode, and improves the efficiency of the dye sensitized solar cell.

The invention discloses a preparation method and application of a TiO2 nanotube coated with an amorphous layer. According to the preparation method, titanium oxide powder is firstly adopted and subjected to hydrothermal reaction in a sodium hydroxide solution to obtain a sodium titanate nanotube; the sodium titanate nanotube is washed and subjected to acid exchange to obtain a titanic acid nanotube; lastly, the titanic acid nanotube is subjected to annealing at a proper temperature to obtain the titanium dioxide coated with the amorphous layer. The main body of the titanium dioxide nanotube is an anatase phase and adopts a one-dimensional tubular structure; a part of amorphous titanium dioxide remains on the surface of main body of the titanium dioxide nanotube. As the amorphous titanium dioxide layer is adopted, the specific surface area of the material is higher and the surface functional groups are rich; moreover, the material has certain light absorbing characteristics in a visible light region and the TiO2 nanotube can be applied in the field of water treatment, sensing, dye stuff/ quantum dot sensitization solar batteries.

The invention relates to a preparation method of a high-heat-conduction aluminum nitride thick film, belongs to the technical field of surface coating preparation and application and mainly solves the technical problems that an aluminum nitride thick film can not be prepared, the deposition speed is low, commercialization is difficult to realize and the like in the prior art. According to the method, the aluminum nitride thick film is deposited through arc ion plating, the nitrogen/aluminum ratio in the film is uniform, the thickness of the prepared AlN high-heat-conduction film can be up to 3-10mu m, and a large bonding force can be generated between the film and a substrate, wherein the involved substrate material can be metal such as stainless steel, iron, copper, aluminum and the like, or can be an inorganic non-metal material such as ceramic, glass and the like, or can be a high-molecular organic polymer such as epoxy resin, polyimide and the like. The preparation method comprises the following steps: performing surface treatment on the substrate material; and by selecting pure aluminum as a cathode target material and using pure nitrogen gas as reacting gas, forming the AlN high-heat-conduction film through reaction between aluminum ions obtained by ionization and the nitrogen gas, wherein the purity of the aluminum target material is 99.99%, and the purity of the nitrogen gas is 99.999%. Thus, the method is applicable to multiple fields such as electronic measuring instruments, computer equipment, measurement and control systems, airplanes, precision weapons and the like.

The invention relates to a high-temperature-resistant multi-layer composite diaphragm for a lithium ion battery and a preparation method thereof. The diaphragm is of an A1/B/A2 three-layer structure or an A1/B two-layer structure, wherein A1 and A2 are high-temperature-resistant polymer porous membranes prepared by applying an electrostatic spinning process; the middle layer B is a polyolefin diaphragm, A1/B/A2 or A1/B is compounded through a compounding process, and a three-layer or two-layer composite diaphragm is obtained. The lithium battery diaphragm prepared by the invention has the characteristics of lower closed pore temperature of the middle layer and high temperature resistance of the porous diaphragm on the surface layer, the preparation process is simple and feasible, the adhesive force between different diaphragms is strong, the thermal dimensional stability is excellent, and the dimensional stability, the integrity and the electrolyte wettability of the diaphragm under the condition of extremely high temperature of the lithium ion battery can be improved; therefore, the safety of the battery is improved and the application prospect is good.

The invention relates to a ZnSe nanowire and a preparation method and an application thereof. The ZnSe nanowire is grown along the crystal orientation of the <100>. The ZnSe nanowire is provided with a sphalerite structure, the average diameter is 20 nm-80 nm, the length is 0.5 [mu]m-10 [mu]m, the size is uniform, the crystallinity is good, and the ZnSe nanowire has no structural defects such as a stacking fault. According to the ZnSe nanowire and the preparation method and the application thereof, ZnSe powder servers as pre-reaction materials, gold serves as a catalyst, and the ZnSe nanowire growing is obtained through growth on FTO conductive glass or a SnO2 single crystal substrate by a chemical vapor deposition method. The nanowire can be used for constructing solar batteries, photodetectors, nanometer lasers and the like, performance is especially good in the aspect of hydrogen production through solar photoelectrocatalysis decomposition of water, and good application prospects are achieved.

The present invention discloses a ZnSe-GaP solid solution nanometer material and a preparation method thereof. According to the present invention, the prepared ZnSe-GaP solid solution nanometer material has the linear shape, has the diameter of 50-500 nm, and has the length of 5 [mu]m-5 mm; the preparation method comprises: adding zinc selenide, gallium phosphide, selenium powder and zinc powder to a three-temperature-zone tubular furnace, and growing on a graphite substrate by using a CVD method so as to obtain the ZnSe-GaP solid solution nanometer material; and the prepared ZnSe-GaP solid solution nanometer material has characteristics of good crystal, large aspect ratio and uniform size, and the preparation method has characteristics of simple process, easy process parameter control and simple operation, is suitable for large area preparation, and is used for preparation of nanometer optoelectronic devices.

The invention discloses a method for preparing a ZnO nano-rod array by a pulse electromagnetic field. The method provided by the invention solves the problem that the existing ZnO nano-rod array has a small length-diameter ratio and low verticality. The method provided by the invention comprises the following steps of putting fluorine-doped tin oxide (FTO) electrically-conductive glass into a supersonic wave washer, carrying out cleaning, dropwisely adding a mixed solution of zinc acetate, ethanolamine and ethylene glycol monomethyl ether on the cleaned FTO electrically-conductive glass, uniformly spreading the mixed solution on the cleaned FTO electrically-conductive glass by a spin coater, putting the cleaned FTO electrically-conductive glass coated with the mixed solution into a tube-type heating furnace, carrying out heating to obtain a ZnO film, dissolving zinc chloride into deionized water to obtain a precursor solution, adjusting a pH value of the precursor solution by ammonia water, putting the FTO electrically-conductive glass coated with the ZnO film into a reactor, pouring the precursor solution into the reactor, carrying out pulse electromagnetic field treatment on thereaction system in the reactor by a pulse electromagnetic field generation device, then transferring the reactor into an incubator, carrying out a hydro-thermal reaction process, washing off white precipitates on the surface of the FTO electrically-conductive glass by deionized water, putting the FTO electrically-conductive glass obtained by the previous step into a constant-temperature dry box and carrying out drying to obtain the ZnO nano-rod array. The method provided by the invention does not adopt a surfactant, and has simple processes, low energy consumption and no pollution.

The invention relates to a method for preparing a micro-nano fiber membrane with a core-shell structure through electrostatic spinning by a Janus parallel needle. The tail section of the needle comprises double channels, the double channels at the front section are combined to form a single channel, and therefore, two solutions are mixed for further preparation ofthe fiber with the core-shell structure. The electrostatic spinning process comprises following steps: macromolecules are dissolved in a solvent and stirred until the macromolecules are completely dissolved, or the macromolecules areheat to be molten, and spinning precursor solutions are obtained; two different macromolecule solutions or melts are extracted by injectors respectively and connected to the double channel ends of theJanus parallel needle through latex tubes; a positive pole of a high-voltage power supply is connected to the single channel section of the Janus parallel needle, and a negative pole is connected toa receiving device; spinning parameters are set, the power supply is switched on, the spinning is performed for a period of time, and the micro-nano fiber membrane with the core-shell structure is obtained. The preparation method is simple, the core-shell structure is controllable, the cost is lower, and the membrane can be applied to the fields of filtration and adsorption, drug loading, tissue engineering scaffolds and the like.

The invention discloses a graphite carbon nitride nanotube array photoelectrode, a preparation method of the array photoelectrode and application in solar energy photoelectrochemistry decomposition water generation oxygen serving as a photo-anode. The diameters and lengths of graphite carbon nitride nanotubes in the graphite carbon nitride nanotube array photoelectrode can be adjusted, the diameter range is 20nm-170nm, and the length range is 400nm-2500nm. The graphite carbon nitride nanotube array photoelectrode is obtained by high-temperature condensation polymerization in an inert atmosphere with anodized aluminum supported by a conductive substrate as a template and with concentrated cyanamide solutions as a precursor. The graphite carbon nitride nanotube array photoelectrode has a large specific area and more surface activity sites, serves as the photo-anode to be applied in solar energy photoelectrochemistry decomposition water generation oxygen, and has excellent performance.

The invention provides an air-alcohol ion nitrocarburizing and oxidizing process for steel, which relates to the surface chemical heat treatment process for steel, and is applicable for the surface reinforcing of carbon steels, alloy structural steels and die and tool steels. The invention comprises such procedures as: cleaning, drying and placing a tempered work piece on a cathode disc of an ion nitriding furnace, vacuuming the inside of the ion nitriding furnace, inputting an adjustable DC voltage, inputting air and alcohol in flow proportions and meanwhile heating, keeping temperature, cooling in the furnace, and tapping. The invention uses no ammonia or nitrogen hydrogen, reduces cost, and reduces environmental pollution as well as hidden problem concerning safety due to hi-pressure gas bottle and combustibility and explosivity of hydrogen, and improves the wear resistance and hardness of work pieces.