20 results about "Nanosheet" patented technology

The invention discloses application of a two-dimensional transitional metal carbide nanosheet as a radionuclide adsorbent. Due to the fact that two-dimensional transitional metal carbide nanosheet MXene material has an absorption effect on radionuclide, the two-dimensional transitional metal carbide nanosheet can be utilized as the adsorbent for absorbing radionuclide.Compared with other inorganic nanometer adsorption material, MXene material, featuring a nano layered structure, can effectively increase adsorption capacity of radionuclide. In the meantime, storage space of the adsorbent is greatly reduced due to large density of MXene material.Accordingly, MXene material has potential application value in the field of irradiated fuel reprocessing, control over radioactive pollutants discharged by a nuclear power station, a hospital, a factory and others.

The invention discloses a polymethyl methacrylate-zinc hydroxide nanocomposite and a preparation method thereof. The nanocomposite is powder of which the grain size is 5-40mum. The nanocomposite is formed by connecting zinc hydroxide nanosheets and polymethyl methacrylate in mass percent of (1-40):(60-99) by Zn-O chemical bonds. The zinc hydroxide nanosheets are 5-50mum long, 5-50mum wide and 50-500nm thick, and the polymethyl methacrylate is 50-500nm in grain size. The preparation method comprises the following steps of mixing soluble ammonium salt, soluble zinc salt and water firstly and evenly stirring to obtain mixed solution, adding the polymethyl methacrylate to the mixed solution and stirring to obtain complex solution, subsequently, adding an emulsifying agent to the complex solution and severely stirring to obtain emulsion, then, adding an initiating agent to the emulsion to obtain composite emulsion, and then, putting the composite emulsion in vacuum for drying to obtain a target product. The polymethyl methacrylate-zinc hydroxide nanocomposite is excellent in heat stability, and can be widely used in the field of aviation, automobiles, electronic instruments, consumer goods and the like.

The invention discloses a method for preparing three-dimensional porous bioactive glass. The method comprises the following steps: preparing a three-dimensional porous silicate nanosheet array to serve as a main support material of the bioactive glass through a hydrothermal method; regulating the concentration and reaction time to regulate the particle size of macroporous silicate nanosheets and the size of the nanosheets; and supporting a microporous molecular sieve onto the silicate nanosheets through the hydrothermal method, thereby obtaining the three-dimensional porous bioactive glass of a hierarchical structure. The bioactive glass prepared by the method has a similar structure to that of a natural bone material. The microporous molecular sieve has a drug sustained release function, a composite structure and a functional bionics principle. Meanwhile, the bioactive glass has excellent biocompatibility, biological activity and drug sustained release function and can promote adhesion, proliferation and differentiation of cells on the surface of the bioactive glass. The three-dimensional porous ordered bioactive glass can serve as a new-generation bone substitution material and a biological scaffold material for bone repair.

The invention discloses a composite electrode material, a preparation method and a super capacitor. The preparation method of the composite electrode material comprises: after carbon cloth loaded withCo-MOF is calcined, obtaining carbon cloth loaded with Co<3>O<4> nanosheets; and taking the carbon cloth loaded with the Co<3>O<4> nanosheet as a working electrode, and carrying out electrodepositionin an electrolyte to obtain the composite electrode material. The electrolyte comprises aniline and 0.8 to 1.2 M of sulfuric acid, and the electro-deposition time is 10 to 14 minutes. The compositeelectrode material provided by the invention is the composite electrode material in which carbon cloth is loaded with core-shell structure nanosheets, wherein the core is Co<3>O<4> nanosheets, and theshell is made from polyaniline. According to the composite electrode material disclosed by the invention, the Co<3>O<4> nanosheets obtained in preparation and the core-shell structure nanosheets in aproduct uniformly grow on carbon cloth, and collapse is avoided; and the composite electrode material can be directly used as a working electrode, is high in specific capacitance, good in cycling stability and large in specific surface area, and can improve the utilization rate of active substances.

The invention discloses a preparation method of a SnS2 nanosheet loaded graphene-based nano composite material, which comprises the following steps: step 1, dispersing graphene oxide nanosheets in deionized water to prepare a graphene oxide solution; 2, dissolving tin tetrachloride in deionized water, and adding thiourea as a sulfur source and a reducing agent; 3, adding the graphene oxide solution in the step 1 into the solution obtained in the step 2, and carrying out mixing treatment through ultrasonic waves and transferring a mixture of the two solutions subjected to ultrasonic treatment into a hydrothermal reaction kettle for reaction to obtain a precipitate; and 4, centrifuging, washing, drying and grinding the precipitate obtained by the reaction in the step 3 to obtain the graphene nanosheet/tin disulfide composite nanomaterial. The graphene nanosheet/tin disulfide composite nanomaterial prepared by the method has higher capacity and stability when being used as a sodium storage electrode material.

The invention relates to an efficient photoelectric converter based on a carbon fiber@ tungsten disulfide nanosheet core-shell composite structure and a preparation method of the efficient photoelectric converter, and belongs to the technical field of novel materials and application thereof. The efficient photoelectric converter provided by the invention adopts the carbon fiber@ tungsten disulfide nanosheet core-shell composite structure as a photoelectric conversion material; furthermore, ohmic electrodes are arranged at two ends of each carbon fiber with the carbon fiber@ tungsten disulfide nanosheet core-shell composite structure, and the carbon fiber is connected in parallel to a solar receiving device and then is connected in series with a low-voltage power supply and an electrical appliance for combination, so that the photoelectric converter is obtained. The photoelectric converter disclosed by the invention is simple in structure; preparation equipment and a process for the device are simple; the prepared device is stable in structure and performance; the product yield is high, the cost is low, and the production process is clean and environment-friendly. The photoelectric converter prepared by the preparation method is high in photoelectric conversion efficiency and can be used as a solar power generation device and a light signal sensitive detector.

The invention relates to a PbS nano-sheet preparation method. According to the method, analytically pure lead nitrate and L-cystine are adopted as reaction raw materials; deionized water is adopted as a solvent; analytically pure potassium hydroxide and sodium hexadecylbenzenesulfonate are adopted as reaction auxiliary agents; when lead nitrate and L-cystine are mixed in the solution, L-cystine is subjected to a reaction with Pb<2+>, such that a Cys-Pb<2+>-Cys complex is formed; under a high-temperature high-pressure hydrothermal reaction condition, the Cys-Pb<2+>-Cys complex is decomposed, such that a Pb<2+>-Cys complex is formed; with the extension of reaction time, under the hydrothermal condition, C-S bonds are broken, such that agglomerated PbS nano-ions are formed; during the decomposition process, under cystine obstruction and SDBS soft template restriction, PbS crystals extend with a trend of growing along a two-dimensional direction, such that large-area two-dimensional PbS nano-sheets are formed.

The invention discloses a three-dimensional material based on a copper sulfide lamellar structure and a preparation method thereof. The material comprises copper sulfide nano sheets which grow perpendicularly to a foam copper skeleton, and the diameter of the copper sulfide nano sheets is 5-8 micrometers. The material is characterized in that foam copper is used as a substrate skeleton material, and the copper sulfide lamellar nano structure is perpendicularly grown on the surface of the foam copper. The preparation method comprises the following steps: dispersing sulfur powder into methanol,adding the foam copper into the prepared sulfur powder methanol dispersion liquid, placing the obtained material in a reaction kettle, and keeping a temperature of 60-90 DEG C for 3-6h. The copper sulfide lamellar structure provided by the invention has the advantages of a simple preparation process and high catalytic activity, thus the three-dimensional material based on the copper sulfide lamellar structure has potential application prospects in the fields of photocatalysis, catalyst carriers, electrochemical hydrogen storage and the like.

The invention discloses a synthesis method for a porous ZnCo2O4 nanosheet and a pseudo-cubic micro-nano structure. The synthesis method comprises the following steps: (1) weighing CTAB (CetyltrimethylAmmonium Bromide), and dissolving in the mixed solution of deionized water and ethylene glycol at a constant temperature to obtain settled solution; (2) weighing Zn(NO3)2.6H2O, Co(NO3)2.6H2O and ureaat the molar ratio of 1:2:15, dissolving in the solution obtained in (1), and fully stirring; (3) transferring the solution obtained in (2) to a polytetrafluoroethylene lining stainless steel reaction kettle, sealing, and reacting for 3-20h at the temperature of 100-180 DEG C; (4) after reaction is finished, naturally cooling to room temperature, carrying out centrifugation, respectively cleaningwith the deionized water and absolute ethyl alcohol for three times, and drying to obtain a Zn-Co precursor. According to the synthesis method, through the simple regulation and control of reaction parameters, the micro-nano structure of ZnCo2O4 of different morphologies can be obtained through synthesis.

The invention discloses preparation of a water-soluble metal-organic framework composite material and application thereof in detecting the concentration of fluorine ions in water. The preparation comprises the following steps of: preparing a urea solution; adding aluminum trichloride into ultrapure water, carrying out ultrasonic treatment until the aluminum trichloride is completely dissolved, adding 2-aminoterephthalic acid under a stirring condition, and stirring until the 2-aminoterephthalic acid is completely dissolved to obtain a mixed solution; slowly dropwise adding the urea solution into the mixed solution, and stirring to obtain a reaction solution; carrying out heat preservation after the reaction solution is heated, cooling, centrifuging, washing precipitates, and carrying out centrifugal separation to obtain a first product; and dispersing the first product into N, N-dimethylformamide, stirring, carrying out centrifugal separation to obtain a second product, dispersing thesecond product into methanol, stirring, carrying out centrifugal separation, and carrying out vacuum drying to obtain the water-soluble metal organic framework composite material. The composite material is used for detecting the fluorine ion concentration in water. The fluorescent probe prepared by the preparation method has a nanosheet microstructure, is easy to store, and has excellent solubility and good stability in water.

The invention discloses a zirconium hydroxide nanosheet/nanofiber composite membrane and a preparation method thereof. The composite membrane is of a hierarchical pore structure, wherein the zirconium hydroxide nanosheets are constructed at the surface confinements of the polymer nanofibers and are uniformly distributed on the surfaces of the polymer nanofibers; and the zirconium hydroxide nanosheet is in a zigzag form. The preparation method comprises the following steps: dissolving a high-molecular polymer in a solvent to prepare a high-molecular polymer solution; adding a zirconium source and an electrostatic spinning precursor solution; and injecting the mixture into an injector for electrostatic spinning to obtain a hybrid nanofiber membrane with uniform fiber diameter, infiltrating the hybrid nanofiber membrane with ammonia water, and heating for reaction. The preparation process is simple, environmentally friendly and energy-saving; the prepared super-soft self-supporting zirconium hydroxide nanosheet/nanofiber composite membrane has a hierarchical pore structure, super-strong moisture permeability and super-high air permeability, and has very strong adsorption and degradation capabilities on erosive chemical warfare agents and simulants thereof, and neurological chemical warfare agents and simulants thereof.

The invention provides a preparation method of a double-layer zinc stannate nanosheet negative electrode material and a product and application of the double-layer zinc stannate nanosheet negative electrode material. Zinc salt and tin salt are dissolved in deionized water according to the molar ratio of 2: 1: 300, and stirring is conducted till the solution is clear; carrying out oil bath reflux at 110-120 DEG C for 3-5 hours, cooling to room temperature, washing and drying to obtain dispersed zinc stannate nanoparticles; the preparation method comprises the following steps: dispersing zinc stannate nanoparticles in 50 mL of isopropanol, magnetically stirring for 24-48 hours, centrifuging for 10-20 minutes at the rotating speed of 8000-10000 rpm, and drying to obtain the double-layer zinc stannate nanosheet. The double-layer zinc stannate nanosheet has larger specific surface area and conductivity, is beneficial to improving the electrochemical performance of the material, has the first charge specific capacity of 680 mAh/g and the first discharge specific capacity of 1347 mAh/g, and has higher discharge specific capacity. The preparation process is relatively simple and easy to operate.

The invention provides a photo-thermal preparation based on a selenium nanosheet. The photo-thermal preparation based on the selenium nanosheet comprises the selenium nanosheet, and polyethylene glycol attached to the selenium nanosheet, wherein the selenium nanosheet has a good photo-thermal conversion rate, and cancer cells are killed by utilizing local high temperature generated by the seleniumnanosheet under the irradiation of near-infrared laser, so that the effect of photo-thermal tumor treatment is achieved. Polyethylene glycol is attached to the surface of the selenium nanosheet, andhydrogen bonds are formed between hydroxyl on the surface of polyethylene glycol and an aqueous solution, so that the photo-thermal preparation based on the selenium nanosheet can be better promoted to be dissolved in the aqueous solution, and the advantages of being good in compatibility, high in stability and the like are achieved. The invention further provides a preparation method and application of the photo-thermal preparation based on the selenium nanosheet.

The invention belongs to the technical field of biomedical materials and particularly relates to a silicon-phosphorus-based composite stent as well as a preparation method and application thereof. The preparation method disclosed by the invention comprises the following steps: (1) dispersing silicon-phosphorus nanosheets, and then, adding an organic matter for reaction to obtain organic matter modified silicon-phosphorus nanosheets; (2) ultrasonically dispersing the organic matter modified silicon-phosphorus nanosheets, adding a biopolymer material, and carrying out uniform mixing to obtain a precursor; and (3) adding a cross-linking agent into the precursor, injecting the mixture into a mold, and performing ultraviolet irradiation to form a three-dimensional cross-linked network, thereby obtaining the silicon-phosphorus-based composite stent. According to the silicon-phosphorus-based composite stent as well as the preparation method and application thereof, silicon-phosphorus nanosheets are modified by the organic matter, the organic matter forms an organic coating layer on the surface of each silicon-phosphorus nanosheet, and the silicon-phosphorus nanosheets and the organic coating layers are combined through chemical bonds or Van der Waals force, so that the stability of the silicon-phosphorus nanosheets can be improved, and the dispersity of the silicon-phosphorus nanosheets in the composite stent can be improved.

The invention belongs to the technical field of communication equipment components, and discloses a controllable attenuation band-pass filter, which comprises a dielectric layer, a metal layer is arranged on one side of the dielectric layer, and an input microstrip line, a plurality of resonators, a plurality of graphene nanosheets and an output microstrip line are arranged on the other side of the dielectric layer; the plurality of resonators are arranged between the input microstrip line and the output microstrip line at intervals, an input coupling slot with a first preset width is reserved between the input microstrip line and the adjacent resonator, a coupling line is arranged between the two adjacent resonators, and the resonators are connected through the coupling line; the plurality of graphene nanosheets are respectively clung to the plurality of resonators; the input microstrip line, the resonators and the output microstrip line are all provided with a plurality of connecting holes, and the connecting holes penetrate through the dielectric layer and are connected with the metal layer. According to the invention, functions of an attenuator and a filter are realized by using one device, the cost is reduced, the integration level is good, the selectivity is good, the design structure is simple, and the device has a good application prospect in the development of communication systems.

The invention discloses a method for improving corrosion resistance of vinyl resin, and belongs to the technical field of high polymer materials. Adding vinyl resin into the MXene nanosheet solution, and evaporating the solvent to dryness; and then sequentially adding a cobalt iso-octoate accelerant and a butanone peroxide initiator, defoaming, standing for curing, and then heating. The corrosion resistance of the MXene nanosheet modified vinyl resin is utilized, and the mechanism is as follows: after the nanosheet is combined with the resin, the isolation effect of a resin coating on corrosive liquid is improved, the hydrophobicity of the resin coating is effectively improved, and meanwhile, the isolation effect of the resin coating on corrosive ions can be effectively improved after modification; the two-dimensional MXene nanosheet is used for modifying the corrosion resistance of the vinyl resin for the first time, the preparation process is simple, the addition amount of the nanosheet is small, and the corrosion resistance of the vinyl resin can be well improved.

The invention relates to a pulling type solar collection device of solar equipment. The solar collection device, arranged on the top of the solar equipment, includes a first solar panel and guide rails arranged at two ends of the first solar panel. A second solar panel is arranged below the first solar panel. Two ends of the second solar panel are each provided with a first slide block that matches one corresponding guide rail. A third solar panel is also arranged below the first solar panel. Two ends of the third solar panel are each provided with a second slide block that matches one corresponding guide rail. The first, second and third solar panels are based on a dye-sensitized solar cell. The dye-sensitized solar cell includes a photo anode, a counter electrode and an electrolyte, wherein the photo electrode and the counter electrode face each other and the liquid electrolyte is sandwiched between the photo electrode and the counter electrode. The photo electrode includes an FTO substrate, a TiO2 composite film is arranged on the surface of the FTO substrate, and the TiO2 composite film includes an SrTiO3/Zn2SnO4/TiO2 nano-sheet heterostructure and a TiO2 nano-particles.