558 results about "Flower like" patented technology

The invention discloses a preparation method for preparing manganese dioxides in various crystal forms, comprising the following steps of: with divalent manganese salt as a reducing agent and potassium permanganate as an oxidant, adjusting the ratio of raw materials, and reacting in a reaction kettle at 160 DEG C for 1-12h to synthesize both one-dimensional alpha-MnO2 nano fibers and beta-MnO2 nano bars and gamma-MnO2 flower-like structures. The preparation method is simple in preparation process and low in cost; and the product can be used for the research in fields such as super capacitor direction, catalysis and the like.

A stent made of single nitinol wire or other biocompatible material having shape memory properties may be configured to define a flower-like configuration generally providing a proximal plane and a distal plane, each generally centered around a generally cylindrical passage and configured for maintaining patency of an anastomosis or other opening. The wire or other biocompatible material may include a shroud or other covering and may also include one or more loops configured to allow relatively secure engagement of sutures. Methods of deployment are also provided.

The invention provides a cobalt sulfide / carbon composite material with a flower-like structure and a preparation method thereof, and belongs to the technical field of fuel cell electrocatalysts and preparation thereof. The cobalt sulfide / carbon composite material with the flower-like structure is prepared from flower-like carbon with the diameter of 1-5 microns and Co9S8 with the particle sizes of 5-70nm; the mass percent content of the Co9S8 is 30%-80%; the flower-like carbon is prepared from interconnected carbon nanosheets of which the radial sizes are 0.5-3 microns and the thicknesses are 5-20nm; and Co9S8 particles are uniformly loaded on the carbon nanosheets. The preparation method of the cobalt sulfide / carbon composite material with the flower-like structure comprises the steps of intercalating anions of organic small molecules between layered cobalt hydroxide layers through hydrothermal reaction to obtain an intercalated structure precursor, mixing the intercalated structure precursor with powdered sulfur, and then carrying out high-temperature calcination to obtain the cobalt sulfide / carbon composite material with the flower-like structure. The method has the advantages that the method is environment-friendly and nontoxic, the technology is simple and the production cost is low.

The invention relates to a manganese dioxide asymmetric super capacitor and a manufacturing method of the super capacitor; the manganese dioxide asymmetric super capacitor is characterized in that a positive pole of the super capacitor is made of flower-like manganese dioxide or nano manganese dioxide / active carbon composite material with higher pseudocapacitance, and a negative pole of the super capacitor is made of porous carbon with large specific surface area; a water solution system containing univalent or divalent cation is adopted as electrolyte of the super capacitor; and the asymmetric super capacitor formed by encapsulation has the characteristics of being higher in energy density, low in cost, safe and free from pollution.

A fall-protection system and method are described. The system has at least one sensor for sensing if the person is falling and for outputting a status signal. The system also has a processor configured for receiving the status signal from the at least one sensor, and for outputting a corresponding command signal. The system also has a support for the at least one sensor and the processor, the support being portable by the person. The system also has a fall-protection device mountable to the support and configured for receiving the command signal from the processor. The fall-protection device has inflatable membranes, at least some of which are deployable as elongated extensions so to protect a part of the person by forming a substantially flower-like enclosure before said part contacts the ground surface. The fall-protection device is deployable upon the processor outputting a command signal indicative that the person is falling.

The invention discloses a preparation method of a self-assembled ultrathin flower-like nickel cobalt phosphide electrocatalytic material, which is applied to the technical field of electrocatalysis. In the preparation method provided by the invention, a low-temperature hydrothermal-phosphating method is adopted in a preparation process, no additional precipitant is added in reaction, and a nickelsalt and a cobalt salt directly react with a solvent to generate OH-ions, thereby reducing the production cost, simplifying the process and being environmentally friendly. At the same time, an electrocatalytic active substance grown in situ on foamed nickel is directly used as a working electrode, not only avoiding the use of a binder, but also greatly enhancing the electrochemical activity of theactive substance. The self-assembled ultrathin flower-like nickel cobalt phosphide prepared by the method provided by the invention shows good electrocatalytic hydrogen evolution performance in an electrochemical test. In addition, compared with the traditional preparation method, the preparation method provided by the invention has the advantages of simple operation, relatively mild synthesis conditions, energy saving, cheap materials, environmental protection and the like.

An apparatus for treating tissue includes a first energy application device to direct energy at tissue of a patient to cause at least one channel to be formed and a controller to control application of energy from the first energy application device to form the at least one channel. The at least one channel may be in the shape of a spiral-like shape or may be in a flower-like shape. Mechanisms are provided to help open channels formed in the human skin structure. A second energy application source may be used to maintain the channel open after formation. The controller may cause the first energy application device to form a plurality of channels of varying depth, width and distribution over the human skin surface. The apparatus to control the application of energy may be operated using a foot-activated pedal.

The invention discloses a flower-like nano-WO3 / graphene composite gas-sensitive material and a preparation method and an application thereof. According to the invention, oxidized graphene and soluble tungsten salt are compounded by a microwave-stirring hydrothermal method so as to prepare the flower-like nano-WO3 / graphene composite gas-sensitive material. The content of graphene in the nano-WO3 / graphene composite gas-sensitive material is 0.1-1.0%. The nano-WO3 / graphene composite gas-sensitive material provided by the invention has unique and uniform morphology, has high sensitivity to aniline gas and has good selectivity. Operating temperature is as low as 80 DEG C. The preparation method adopts microwave heating and stirring. The technology is advanced, reaction time is short and cost is low.

The invention discloses an anode material for lithium sulfur batteries and a method for preparing the anode material. The method includes compounding flower-like zinc oxide and polydopamine under the effect of template agents to prepare polydopamine / flower-like zinc oxide; carrying out carbonization and acid treatment on the polydopamine / flower-like zinc oxide to form three-dimensional flower-like carbon structures; filling the obtained three-dimensional flower-liked carbon structures with sulfur; coating a layer of conductive polymers PDA (polydopamine) on obtained carbon sulfur composite materials. The three-dimensional flower-like carbon structures are used as carriers. The anode material and the method have the advantages that the electrochemical performance and the stability of elemental sulfur which is used as the anode material for the lithium sulfur batteries can be effectively improved; the anode material for the lithium sulfur batteries has flower-like morphology, accordingly, the specific surface area can be effectively increased, and the anode material can be in sufficient contact with electrolyte; the sulfur can be supported by hierarchical holes of the formed three-dimensional flower-like carbon structures, the conductive polymers can be coated by the hierarchical holes, accordingly, loss of polysulfide can be effectively inhibited, and the conductivity and the cyclic stability of electrodes can be improved.

The present invention discloses a method for complexing hydrothermal synthesis of uniform flower-like MoS2 nanospheres. The method comprises: sequentially dissolving a certain amount of a molybdenum source, a sulfur source and a complexing agent in deionized water to form a solution, regulating the molybdenum source concentration to 0.04-0.16 M, regulating a molar ratio of the sulfur source to the molybdenum source to 2:7-4:1, and regulating a molar ratio of the complexing agent to the molybdenum source to 2-6; placing the prepared solution in a closed hydrothermal reaction kettle, controlling the reaction temperature at 120-200 DEG C, and controlling the reaction time at 24-72 h; and after completing the reaction, cooling, carrying out suction filtration, washing, and drying to obtain the flower-like MoS2 nanospheres. According to the present invention, the synthesis method has advantages of mild condition, simple operation, uniform product morphology and particle size, good product dispersion property, and high yield; and the synthesized flower-like MoS2 nanospheres adopted as oil product hydrogenation catalysts, electrode materials, solid lubricants and the like have wide applications.

The invention discloses a flower-like spherical silver powder preparing method which includes steps that: (1) 1-50g / L silver nitrate solutions and 1-200g / L ferrous sulfate reductant solutions are prepared; (2) complexing agents are added into the silver nitrate solutions and the silver nitrate solutions with the complexing agents are evenly mixed, wherein the complexing agents are binary and n-nary (n>2) organic acids, organic acid anhydrides or organic acid salts, the ratio of carboxyl group concentration and silver ion concentration of the mixed silver nitrate solutions is 0.1:1-1:1, and the silver nitrate solutions and the ferrous sulfate reductant solutions are cooled to be at 0-20 DEG C; (3) reductants are added into the silver nitrate solutions and are continuously stirred until the color of the solutions does not change any more; and (4) deionized water is used for washing for several times after centrifugal separation or natural setting, absolute ethyl alcohol is used for washing for several times, and then the silver nitrate solutions are dried in vacuum on the condition of 0-80 DEG C to obtain flower-like spherical silver powder. The flower-like spherical silver powder obtained in the flower-like spherical silver powder preparing method has good sphericity degree and has a rough surface and narrow particle size distribution, and the number of pieces of the flower-like silver powder can be freely adjusted.

The present invention discloses a method for producing flower-like sphere type nanometer magnesium hydroxide with characteristics of light weight and high specific surface area. The method comprises: (1) preparing a magnesium salt aqueous solution with a certain concentration in a reaction container; (2) preparing an alkaline solution with a certain concentration in a container; (3) adding a certain amount of a dispersing agent to the solution obtained in the step (1) or solution obtained in the step (2) before a reaction; and (4) slowly adding the solution obtained in the step (2) to the solution obtained in the step (1) in a dropwise manner, or slowly adding the solution obtained in the step (1) to the solution obtained in the step (2) in a dropwise manner, reacting to obtain a white precipitate, aging, and carrying out centrifugation washing on the white precipitate (magnesium hydroxide) so as to remove other impurity ions through the washing to obtain the white gelatinous solid. According to the present invention, the special shape magnesium hydroxide preparation method with characteristics of easy operation, no environmental pollution, easy amplification and low equipment requirement is provided, and the magnesium hydroxide synthesized by the method of the present invention is mainly used for printing and dyeing wastewater treatments, heavy metal ion adsorption, and flue gas desulfurization agents.

The invention relates to a flower-like manganese dioxide electrode material for a super-capacitor and a preparation method thereof, and is characterized in that the preparation method comprises the following steps: respectively dissolving potassium permanganate and a manganous salt in deionized water; carrying out stirring for 10 to 30 min under the condition of strong stirring, adding a manganous salt solution into a potassium permanganate solution, wherein the molar ratio of the manganous salt to potassium permanganate is 1: 0.1-10, and transferring a mixed solution to a hydrothermal reaction kettle for a hydrothermal reaction so as to obtain a brownish black precipitate, with a filling rate being 50 to 95%, hydrothermal reaction temperature being 100 to 160 DEG C and hydrothermal reaction time being 2 to 3 hours; and carrying out rinsing with deionized water until a filtrate is colorless and drying a filter cake at a temperature of 40 to 160 DEG C for 1 to 48 hours so as to finally obtain flower-like manganese dioxide. According to the invention, flower-like manganese dioxide with a controllable crystal form and a controllable particle size is rapidly prepared by adopting a hydrothermal method; prepared manganese dioxide has a flower-like structure and a large specific surface area, and the utilization rate of manganese dioxide in a super-capacitor is increased.

The invention relates to a flower-shaped copper oxide catalyst and a preparation method and application thereof to the direct synthesis of an organic silicon monomer. The preparation method of the flower-shaped copper oxide catalyst comprises the following steps: (1) adding copper salt to ethanol or mixed solvent of ethanol and water to form solution; and (2) stirring and adding ammonia, strong alkali and nitrate to the solution in sequence to obtain a homogeneous solution, transferring the homogeneous solution to a reactor to carry out the thermal reaction of a solvent, and controlling the amount of the product of reaction, the reaction temperature and the reaction time to obtain the lower-shaped copper oxide catalyst. The preparation process of the flower-shaped copper oxide catalyst has simple experiment procedures and low cost, is convenient to operate, is environment-friendly and can be produced on a large scale. The prepared flower-shaped copper oxide powder can be used as the catalyst to the field of the direct synthesis of the organic silicon monomer, and particularly, the flower-shaped copper oxide powder is highly selective for the dimethyldichlorosilane monomer.

The invention provides a three-dimensional flower-like layered double hydroxide and a preparation method thereof. In the preparation of the three-dimensional flower-like layered double hydroxide, aluminum sulfate or aluminum ammonium sulfate, soluble divalent metal salt and alkali are used as raw materials; the characteristic that sphere-like micron-sized aluminium hydroxide particles can be rapidly formed by solution of aluminum sulfate and aluminum ammonium sulfate, of which the pH value is 3.7 to 4, under a temperature of 95 to 100 DEG C is utilized; after being prepared, the micron-sized particles react with the divalent metal salt and the alkali, so that a great amount of LDH (Layered Double Hydroxide) crystal nuclei can be rapidly formed on the surface of aluminium hydroxide; and finally, three-dimensional flower-like structure LDH are formed. A prepared LDH laminate has a thickness of about 10 to 20nm; and the BET (Brunauer-Emmett-Teller) specific surface area of the prepared LDH laminate is greater than 140 m<2> / g and is much greater than that of common LDH. The preparation method disclosed by the invention is simple, is simple and convenient to operate, does not require high temperature and high pressure, does not need to use an organic solvent and a surfactant and is low in cost. The three-dimensional flower-like layered double hydroxide can be widely applied to the fields of adsorption separation, catalysis, high polymer materials and the like.

The invention discloses a three-dimensional flower-like In2S3 / In2O3 composite microsphere photocatalytic material and a preparation method thereof, belonging to the field of pollution control and technology. The preparation method comprises the following steps of taking thioacetamide as a sulfur source, substituting lattice oxygen in the In2O3 with sulfur ions through an ion exchange reaction, performing in situ generation of an In2S3 nanosheet on the surface of flower-like In2O3, and forming a heterojunction structure, wherein the morphology of the three-dimensional flower-like In2O3 is uniform, and the particle size of the three-dimensional flower-like In2O3 is 3.0 to 6.5 microns; coating the surface of / In2O3 microflowers with the In2S3 nanosheet. The used raw materials are low in price and easily-obtained, reaction conditions are easily controlled and the requirement on equipment is low, so the preparation method disclosed by the invention is an environmental-friendly preparation method. By using In2S3 / In2O3 composite microspheres, the utilization rate of the In2O3 to visible light can be improved, and the compounding of photon-generated carriers is inhibited; the In2S3 / In2O3 composite microspheres have good application value and prospect in the field of volatile organic contaminants.

The invention discloses a preparation method of a flower-like tin dioxide and graphene composite material, belonging to the technical field of functional composite materials. According to the preparation method disclosed by the invention, the flower-like tin dioxide and graphene composite material with controllable morphology is prepared from graphene oxide, tin chloride pentahydrate and sodium hydroxide as raw materials by adopting the steps of mixed stirring, hydro-thermal synthesis, solid-liquid separation, cleaning and drying. The method disclosed by the invention has the advantages of simpleness, convenience for operation, lower production cost, no influence on the environment and convenience for popularization and application; and in the method, water is used as solvent and no surfactant is used. The flower-like tin dioxide and graphene composite material prepared by adopting the method can be widely applied to new energy source devices such as a lithium ion battery, a solar cell, a super capacitor and the like, or can be applied to the fields of catalyst carriers, information materials and the like.

The invention discloses a method for preparing flower-like nanometer gold, relating to nanometer gold. The invention provides a method for preparing the flower-like nanometer gold covered by trypsinase with higher stability, better biocompatibility and more uniform particles. The flower-like nanometer gold consists of nanometer particles and is covered by the trypsinase, and the particle diameter of the product is between 100 and 200nm with uniform shapes and particle diameters. Chloroauric acid is mixed with trypsinase solution to obtain a mixed liquid of the chloroauric acid and the trypsinase solution; ascorbic acid is added into the mixed liquid of the chloroauric acid and the trypsinase solution to obtain reaction solution; and the reaction product is collected and washed to obtain the product of the flower-like nanometer gold.

The invention discloses a surface enhanced Raman scattering detection chip and a preparation method thereof. In-situ growth of nanometer flower-like ZnO on a silicon wafer is achieved by utilization of a hydrothermal method. A three-dimensional ZnO-Ag composite material is prepared by utilization of a physical non-solvent magnetron sputtering method. The composite material has high surface enhanced Raman effects. In addition, the composite material is modified with probes so as to construct a chip with the surface enhanced Raman effects. By modification with sulfydryl type probe molecules, explosive molecules with low original Raman activity can be captured on the chip. Through synergetic resonance, the probes and the composite material generate surface enhanced Raman signals, so that the sensitivity of the chip to the explosive molecules is better than that of a simple substrate not modified by probes. In addition, the chip shows good Raman effects for a plurality of explosives and has single high selectivity for the explosive TNT.

An apparatus for treating tissue includes a first energy application device to direct energy at tissue of a patient to cause at least one channel to be formed and a controller to control application of energy from the first energy application device to form the at least one channel. The at least one channel may be in the shape of a spiral-like shape or may be in a flower-like shape. Mechanisms are provided to help open channels formed in the human skin structure. A second energy application source may be used to maintain the channel open after formation. The controller may cause the first energy application device to form a plurality of channels of varying depth, width and distribution over the human skin surface. The apparatus to control the application of energy may be operated using a foot-activated pedal.

The invention discloses a nanoscale flower-like zinc oxide preparation method. The flower-like zinc oxide is prepared by ultrasonic-assisted hydrothermal method, and has uniform particle distribution and a nanoscale flower-like structure with uniformly growing slices as petals. The nanoscale flower-like zinc oxide preparation method provided by the invention has the advantages of easily-obtained materials, simple apparatus and process, high efficiency, high speed, high yield, and so on, and is suitable for large-scale industrial production.

The invention discloses a preparation method of nano-nickel oxide for an electrode material of a supercapacitor, and the nano-nickel oxide prepared by the method. The preparation method comprises the following steps: mixing NiCl2.6H2O and a choline chloride-based deep eutectic solvent to obtain a solution I with the mass concentration being 10 to 30 g / L; and heating to 120 to 150 DEG C, mixing 100 to 300 parts of deionized water and 1,000 parts of the solution I, reacting for 0.5 to 2 hours, performing centrifugal separation to obtain precipitate, and washing, drying and calcining the precipitate to obtain the nano-nickel oxide. The preparation method is mild in condition, short in consumed time and suitable for large-scale industrialized production. The prepared flower-like nano NiO crystal grains have the grain sizes of being less than 10 nm, are distributed uniformly and are large in specific surface area, so the supercapacitor prepared by taking the nano NiO crystal grins as the electrode material has high reversible capacity and cycling performance, and the specific capacity of the supercapacitor is still stabilized to be close to 460 F / g after 3,000 times of charging / discharging circulation.

The invention relates to a carbon nanotube / molybdenum disulfide nanosphere composite material and a preparation method thereof. The preparation method comprises the steps of firstly preparing a nitrogen-doped carbon nanotube, and then reacting to generate a nitrogen-doped carbon nanotube / flower-like molybdenum disulfide nanosphere composite material. The composite material serves as a super-capacitor electrode material and shows excellent electrochemical performance. In addition, the preparation process is simple, green and environmental protection, serves as a new energy material and has great potential applications in the field of equipment such as a super-capacitor and a lithium ion battery.

The invention discloses a preparation method for a flower-like Ag2CO3 / Mg-Al-NO3LDHs nanometer material. The preparation method comprises the following steps: adopting an ion exchange method, using flower-like Mg-Al LDHs as a precursor, dropwise adding a silver nitrate solution, continuously stirring for 1 h at the room temperature, conducting centrifugal separation on the product, cleaning with deionized water, and finally drying in a baking oven at 60 DEG C. The preparation method has the advantages that according to the prepared flower-like Ag2CO3 / Mg-Al-NO3 LDHs nanometer material, through a scanning electron microscope and a transmission electron microscope, the condition that Ag2CO3 nanometer particles are well dispersed on the lamella of flower-like Mg-Al-NO3 LDHs can be clearly observed, and under visible light, not only can dye with different ion types be efficiently degraded, but also a degradation effect is played on a phenol organic solution. The photocatalysis property attributes to the condition that under the modification of Ag2CO3 nanometer particles, heterojunction is formed between Mg-Al-NO3 LDHs and Ag2CO3, so that effective separation and transfer of electrons and holes are realized.

The invention belongs to the technical field of electrocatalytic hydrogen evolution material preparation, and relates to a preparation method for constructing a two-dimensional metal-organic frameworks (MOFs) nano-hydrolysis electrocatalyst based on foamy copper. The preparation method comprises the following steps: based on foamy copper, carrying out the in-situ growth of flower-like copper phosphate nanosheets on the surface of foamy copper through a self-sacrificing template method at first; and then, carrying out the in-situ growth of copper-bearing MOFs nanosheets on the surface of foamycopper based on the copper phosphate nanosheets grown on the surface of foamy copper, wherein the copper-bearing MOFs nanosheets are perpendicular to Cu3(PO4)2 nanosheets. The preparation method provided by the invention has the beneficial effects that foamy copper is adopted as a reaction base, has a three-dimensional network macro-porous structure, and is stable in structure, rich in material source and low in price; through the structural design of the base and the adoption of the self-sacrificing template method for the in-situ growth of the MOFs nanosheets, no extra metal sources need tobe added, the preparation process is simple and controllable, and the structure of the catalyst grown on the surface of the base is stable; and the morphology of a composite material is changed by regulating and controlling the reaction time and the reaction temperature, the ultra-thin MOFs nanosheets are formed, and the specific surface area and the active site exposure ratio are high.

Disclosed are a flower-like nanometer cobalt hydroxide material and a preparation method thereof. The material is synthesized by the self-assembling method. The preparation method includes that metallic cobalt is reacted with alkali in an oil and water double-phase system at the room temperature, and the flower-like nanometer cobalt hydroxide material is prepared under a guiding effect and a wrapping effect of a soft template with the participation of the soft template. The preparation method is simple to operate and easy to control. The size of a multi-dimensional structure a prepared cobalt hydroxide nanoflower ranges from 300 nanometers to 500 nanometers approximately, the multi-dimensional structure of the nanoflower is self-assembled by cobalt hydroxide plates, and the nanoflower is high in specific surface area and pore volume, and can be applied to fields of battery materials, catalytic materials and the like.

The invention relates to a preparation method for a visible-light-responsive composite photocatalyst. The photocatalyst is a few-layer carbo nitride / zinc oxide compound. The composite photocatalyst is prepared by compounding a certain mass of few-layer carbo nitride (few-layer C3N4) and a certain mass of zinc oxide (ZnO). The preparation method comprises the following concrete steps: placing a prepared flower-like ZnO material in deionized water for ultrasonic treatment until uniform dispersion is realized; then adding a certain mass of few-layer C3N4 and continuing ultrasonic dispersion and stirring for a certain period of time; and then transferring a mixed solution to an oil-bath pan for heating under stirring until evaporation to dryness is realized so as to obtain the few-layer C3N4 / ZnO composite photocatalyst. The results of photocatalysis performance experiments prove that the composite photocatalyst has a wide visible light response range and high photocatalytic activity compared with a non-visible-light-responsive ZnO material with a wide band gap, and has good application prospects and economic benefits in conversion of solar energy, sewage treatment and the like.