165 results about "Phosphorene" patented technology

Embodiments of the invention include methods and devices for producing light by injecting electrons from field emission cathode across a gap into nanostructured semiconductor materials, electrons issue from a separate field emitter cathode and are accelerated by a voltage across a gap towards the surface of the nanostructured material that forms part of the anode. At the nanostructure material, the electrons undergo electron-hole (e-h) recombination resulting in electroluminescent (EL) emission. In a preferred embodiment lighting device, a vacuum enclosure houses a field emitter cathode. The vacuum enclosure also houses an anode that is separated by a gap from said cathode and disposed to receive electrons emitted from the cathode. The anode includes semiconductor light emitting nano structures that accept injection of electrons from the cathode and generate photons in response to the injection of electrons. External electrode contacts permit application of a voltage differential across the anode and cathode to stimulate electron emissions from the cathode and resultant photon emissions from the semiconductor light emitting nanostructures of the anode. Embodiments of the invention also include the usage of nanostructured semiconductor materials as phosphors for conventional planar LED and nanowire array light emitting diodes and CFL. For the use in conventional planar LEDs, the nanostructures may take the form of quantum dots, nanotubes, branched tree-like nanostructure, nanoflower, tetrapods, tripods, axial heterostructures nanowires hetero structures.

Ionisation of one of a pair of dopant atoms in a substrate creates a double well potential, and a charge qubit is realised by the location of one or more electrons or holes within this potential. The dopant atoms may comprise phosphorous atoms, located in a silicon substrate. A solid state quantum computer may be formed using a plurality of pairs of dopant atoms, corresponding gate electrodes, and read-out devices comprising single electron transistors.

The invention discloses a preparation method of a carbon nanotube reinforced hydroxyapatite composite material, relating to a composite material for prosthesis materials. According to the preparation method, a carbon nanotube is synthesized in hydroxyapatite powder, the carbon nanotube is subjected to surface modification by using hydroxyapatite, and the carbon nanotube reinforced hydroxyapatite composite material is further prepared. The preparation method comprises the following steps of: firstly preparing carbon nanotube-hydroxyapatite powder from nickel carbonate and the hydroxyapatite powder, then preparing hydroxyapatite-modified carbon nanotube-hydroxyapatite powder, and finally preparing the carbon nanotube reinforced hydroxyapatite composite material. The preparation method disclosed by the invention overcomes the defects that the carbon nanotube is difficult to disperse in a hydroxyapatite matrix, the wettability and the interfacial strength between the carbon nanotube and the hydroxyapatite matrix are low, the hydroxyapatite powder of which the surface is loaded with the carbon nanotube is difficult to form and the biocompatibility of the composite material is poorer in the prior art.

A process for preparing a biologic membrane layer with ordered nanostructure and based on the superhydrophilic / superhydrophobic template includes such steps as electrochemically anodizing on Ti-based material to obtain an ordered TiO2 nanotube array membrane, modifying by FsA-13 to obtain superhydrophobic TiO2 nanotube array membrane, covering with mask, ultraviolet irradiating to obtain a superhydrophiclic pattern, and cathode electrochemical deposition or electrophoretic directional deposition to form a surficial nano-CaP ceramic layer.

The invention discloses a carbon material-black phosphorene composite aerogel and a preparation method and application thereof. The carbon material-black phosphorene composite aerogel is formed by mutual winding of a two-dimensional black phosphorus nano-chip mesh and a carbon material mesh. Different from a conventional aerogel preparation method, the method provided by the invention is characterized in that no chemical cross-linking agent is required, the preparation process is simple in step and convenient to operate, saves time, is efficient, and causes no pollution to environments and material surfaces. The prepared carbon material-black phosphorene composite aerogel has a relatively low density, relatively high porosity and specific surface area and a relatively good photothermal conversion effect, combines excellent physical and chemical properties of black phosphorene, functional characteristics of a carbon material and ultralight and porous characteristics of aerogel, and therefore, lays a solid foundation for further expansion of black phosphorene product series and application.

The invention belongs to the field of novel two-dimensional materials, and in particular relates to multilayer stable black phosphorene and a preparation method. The reaction of the black phosphorene and oxygen is hindered by chelating of a chelating agent and stable modification of a stabilizer, so that superoxide anions are more difficult to generate, thereby greatly reducing the degradation of black phosphorus in an environment. Further, the multilayer stable black phosphorene is obtained by encapsulating elemental sulfur. According to the method, a stable crystal structure of the black phosphorus is guaranteed; meanwhile, service requirements are met; the thickness of the obtained black phosphorene is between 10nm and 20nm. The multilayer stable phosphorene and the preparation method have a wide important application prospect in the fields such as transistors, sensors, solar cells, switches, battery electrodes and the like.

The invention discloses a phosphorus-doped graphene quantum dot-graphite phase carbon nitride p-n junction photocatalyst as well as a preparation method and application thereof. The preparation method comprises the steps of dissolving 1,3,6-trinitropyrene and Na2HPO4.12H2O into water to obtain a mixed water solution, performing hydrothermal reaction under alkaline conditions to obtain phosphorus-doped graphene quantum dots, using Pi-Pi and hydrogen-bond interaction between the phosphorus-doped graphene quantum dots and graphite phase carbon nitride to form a stable composite material. The phosphorus-doped graphene quantum dot is a p-type semiconductor material, and forms a p-n junction composite material with n-type graphite phase carbon nitride; the p-n junction composite material has remarkably improved photogenerated charge separation rate and visible-light catalytic activity, and can be used for visible-light degradation of dye or organic pollutants as well as hydrogen production from photocatalytic water splitting.

The invention discloses an organic zinc ion secondary battery. The battery comprises an anode, a cathode, a membrane between the anode and the cathode, electrolyte with ion conductivity and a surfactant, wherein active materials adopted by the anode include one or more of black phosphorus, black phosphorus / graphite, compound of graphene carbon nanotube or coal, phosphorene and phosphorene / graphite; the active materials adopted by the cathode comprise simple substances, compounds or complexes focusing on zinc element; the electrolyte with ion conductivity comprises a liquid-state or gel-state material which takes soluble salt of zinc as a solute and takes an organic solvent as a solution; the surfactant comprises an ionic surfactant, a nonionic surfactant and a mixture of the ionic surfactant and the nonionic surfactant. The battery has the characteristics of being high capacity density and power density and excellent in cycling stability, and can be widely applied to different fields of electronics, communication, traffic and transportation.

The invention relates to preparation methods for a metal / black phosphorus nanosheet composite material, black phosphorus and black phosphorene, wherein a preparation method for the metal / black phosphorus nanosheet composite material includes: 1) grinding 0.001-1000 g of transition metal powder and 0.001-1000 g of red phosphorus powder in a mortar or a ball mill for 5-60 min to obtain ground powder; 2) loading the ground powder into a carrier container, and placing the carrier container in a reaction chamber; 3) feeding protective gas into the reaction chamber, heating the reaction chamber to 500-1200 DEG C, and maintaining the temperature for 1-24 h; 4) then cooling the reaction chamber to room temperature to obtain the metal / black phosphorus nanosheet composite material. Compared with theprior art, the methods are simple in operation, are safe and environment-friendly, are low in cost, and can be used for producing the metal / black phosphorus nanosheet composite material, black phosphorus and black phosphorene in large scales.

The invention discloses a black phosphorene as well as a preparation method and application thereof. The preparation method comprises the following steps: after the black phosphorene is weighed and grinded, putting in N-methyl pyrrolidone solvent; under an ice bath condition, smashing in an ultrasonic wave cell pulverizer; carrying out centrifugation on obtained solution; and taking supernate to obtain the black phosphorene. The black phosphorene nanosheet prepared with the preparation method of the invention can stably exist under an atmospheric environment. A black phosphorus block is dippedin the N-methyl pyrrolidone solvent, bonds among black phosphorus (nanometer lamellar body) layers are beaten by ultrasonic wave to enable the bonds to be broken, a lamellar structure is loosened andseparated, and a centrifuge is used to separate the lamellar structure to obtain a lamellar nanometer structure. The method is simple and easy in implementation, the centrifuge can carry out filtering according to different sizes to obtain high-quality nanometer slices with different thickness, controllability is higher, and the volume production of the black phosphorus nanometer sheet can be realized. An electrochemistry performance test proves that a polymer solar cell assembled by the black phosphorene synthesized with the method has high electrochemical performance.

The invention discloses a preparation method and application of polyphosphazene modified black phosphorene. The preparation method of the polyphosphazene modified black phosphorene comprises the following steps: co-polymerizing a multi-functional-degree polyamine or polyphenol compound serving as a raw material and hexachlorocyclo-triphosphonitrilic comprising flame-retardant elements N and P, obtaining a cross-linked polymer comprising a polymerizable group and flame-retardant elements, and modifying the surface of the black phosphorene by using the cross-linked polymer. The polyphosphazene modified black phosphorene prepared in the invention can be used as a flame-retardant agent to be added into a polymer matrix, so that the advantages of the polyphosphazene and the black phosphorene can be integrated, the compatibility and the flame-retardant efficiency can be improved, and the mechanical performance of the polymer material can also be improved.

The invention provides a black phosphorene-containing graphene flexible resistive random access memory and a preparation method thereof. The preparation method of the resistive random access memory comprises the steps of cleaning a Al2O3 substrate; depositing a Ni / Au composite thin film by an electron beam evaporation technology to obtain a bottom electrode layer; transferring a black phosphorene-containing graphene composite thin film material on the bottom electrode layer by a transfer method to obtain a resistive changing functional layer; forming a top electrode pattern by a photoresist patterning process, depositing a Ag, Cu or Ni thin film by the electron beam evaporation technology to form a top electrode layer, and removing and stripping photoresist to form a memory unit; and forming a coating layer pattern by the photoresist patterning process, depositing the Al2O3 thin film again by an atomic layer deposition technology to form a coating layer, and removing and striping the photoresist to form the black phosphorene-containing graphene flexible resistive random access memory. The resistive random access memory prepared according to the method is simple in structure, fast in erasure speed and small in operation voltage, non-destructive readout is achieved, and the resistive random access memory can be used for fabricating a large-area flexible device.

The invention discloses a heterojunction semiconductor laser and a manufacturing method thereof. Two layers of Adelta-stacked phosphorene and three layers of Adeltadelta-stacked phosphorene are used to form an I-type semiconductor heterojunction through horizontal connection, and thus, population inversion in a laser diode can be realized and the working current can be effectively reduced. The semiconductor laser diode comprises a lower electrode (1), a substrate (2), a lower coating layer (3), an active layer (4), an upper coating layer (5) and an upper electrode (6) sequentially from bottom to top. The heterojunction of the same material is selected, crystal lattice matching is more easily achieved, the manufacturing process is simpler, the two layers of Adelta-stacked phosphorene and the three layers of Adeltadelta-stacked phosphorene can form the heterojunction through horizontal connection simply by a van der waals force. Through a mechanical stripping method, small-layer phosphorene with different stacked structures can be obtained.

The invention provides a preparation method of a black phosphorene / graphene oxide composite water-based lubricating additive, and the method comprises the following steps: preparing black phosphorenenanosheets by using a high-energy ball milling and liquid phase stripping method, and ultrasonically dispersing the black phosphorene nanosheets into an aqueous solution through hydroxylation treatment to obtain a black phosphorene water-based dispersion liquid; and uniformly mixing the black phosphorene water-based dispersion liquid with a graphene oxide dispersion liquid through an intermolecular self-assembly effect and introducing sodium dodecyl benzene sulfonate, polyethylene glycol and the like at the same time at high temperature and high pressure for functional synthesis to finally prepare the black phosphorene / graphene oxide composite water-based lubricating additive. The water-based lubricating additive prepared by the invention can replace a traditional oil lubricating additive,can effectively reduce the friction coefficient of a lubricant and improve the wear resistance of metals, is energy-saving and environment-friendly, and can be applied to the field of titanium alloycutting processing.

The invention relates to the technical field of photocatalyst preparation, and particularly relates to an ultrathin black phosphorene non-metal promoter material, as well as a preparation method and acomposite material of the ultrathin black phosphorene non-metal promoter material. Liquid nitrogen low temperature pretreatment is beneficial to ultrasonic assisted liquid phase stripping of a layered material, so that the stripping efficiency is improved, and a high quality and high yield ultrathin black phosphorene nanosheet is prepared; the prepared ultrathin black phosphorene nanosheet, as anon-metal promoter material, can form strong electronic coupling with a photocatalyst material, which is favorable for rapid migration of photogenerated charges and provides a relatively large specific surface area to expose more active sites; the ultrathin black phosphorene non-metal promoter material is high in photocatalytic performance.

The invention discloses a gold-modified phosphorus-doped carbon nitride composite material modified titanium dioxide photoelectrode and a preparation method and application thereof. The preparation method comprises the following steps: FTO conductive glass with Tio2 nanorods growing is prepared by taking the FTO conductive glass as a substrate through a hydrothermal synthesis method; a P-doped C3N4 composite material and an Au-modified P-doped C3N4 composite material are prepared; the Au-modified P-doped C3N4 composite material is dissolved in water; and the FTO conductive glass with the Tio2 nanorods growing is spin-coated with the solution to obtain the P-C3N4@Au modified Tio2 photoelectrode (i.e. the gold-modified phosphorus-doped carbon nitride composite material modified titanium dioxide photoelectrode). According to the P-C3N4@Au modified Tio2 photoelectrode, a spectral absorption range is expanded, the absorption intensity of ultraviolet visible light is enhanced, and the photoelectric catalysis property is effectively improved.

The invention discloses a preparing method for a cobalt-phosphide-modified molybdenum-doped bismuth vanadate photoelectrode. The preparing method includes the steps that a bismuth oxyiodide photoelectrode is made on the surface of conducting glass with the sedimentation method, a vanadium source solution and a molybdenum source solution are dropwise added onto the bismuth oxyiodide photoelectrode,annealing cleaning is carried out, and then molybdenum-doped bismuth vanadate photoelectrode is obtained; cobalt phosphide is subjected to electrodeposition on the surface of the molybdenum-doped bismuth vanadate photoelectrode through photo assisting in a three-electrode system, and the novel bismuth vanadate photoelectrode is obtained. The invention also discloses application of the composite molybdenum bismuth vanadate photoelectrode to photoelectrocatalysis decomposition of water. The photoelectrode prepared with the method is used for producing hydrogen through photoelectrocatalysis decomposition of water, and through molybdenum doping, the concentration of charge carriers can be effectively increased, and photocurrent is increased; through cobalt-phosphide electrodeposition, composite loss in the photoelectrode can be effectively delayed, the service life of photon-generated carriers is prolonged, an oxygen evolution reaction on the surface of the photoelectrode is promoted, andtherefore the solar energy photo-hydrogen conversion efficiency of the semiconductor photoelectrode is improved.

The invention discloses an antimony-selenide thin-film solar battery using black phosphorene as a conducting material and a preparation method thereof. The solar battery is characterized in that the battery comprises a metal positive electrode 1, an n type heavily-doped black phosphorene film 2, an n type molybdenum disulfide 3, an intrinsic hydrogenated nano crystalline silicon film 4, a p type antimony selenide film 5, a p type heavily-doped black phosphorene substate 6, and a metal negative electrode 7. According to the invention, the solar battery has the following advantages: the molybdenum disulfide being a direct band-gap semiconductor material is used to form a buffer layer, the antimony selenide having a high absorptivity is used as absorption layer, the intrinsic hydrogenated nano crystalline silicon is used for realizing passivation of a pn junction interface, so that the defect-mode density of the interface is reduced; and because the black phosphorene is used as the conducting material, the series resistance of the battery is reduced, the light current is increased substantially, and the photoelectric conversion efficiency of the antimony-selenide thin-film solar battery is improved.

The invention discloses a preparation method of a shell-like structure cellulose nanofiber / black phosphorene composite film. The method comprises the following steps: obtaining stably existing cellulose nanofiber / black phosphorene dispersion by virtue of hydrogen bond interaction, and forming the layered cellulose nanofiber / black phosphorene composite film in a self-assembly manner. According to the preparation method disclosed by the invention, the cellulose nanofiber serves as a construction module of a black phosphorene nano-composite film, self-assembly is performed by adopting a vacuum suction filtration method, and the shell-like structure layered composite film having excellent mechanical property and fireproof performance. The cellulose nanofiber / black phosphorene composite film prepared by the invention has an ordered 'brick-mud' layered structure, is excellent in mechanical property, additionally has excellent biocompatibility, and can be applied to the fields of tissue engineering, biological medicines and the like.

The invention discloses a two-dimensional embedded structure catalyst, as well as a preparation method and application thereof. The catalyst is prepared by embedding noble metal into the laminar structure of black phosphorene which has a two-dimensional laminar structure and serves as a carrier, wherein the content of noble metal is 2-500 percent of the weight of the carrier. The catalyst has excellent durability and high stability, can be used for prolonging the service life of a fuel cell, and can be used as a catalyst of a proton exchange membrane fuel cell.

The invention relates to a titanium dioxide nanotube / hydroxyapatite composite coating used for medical porous titanium and a preparation method of the titanium dioxide nanotube / hydroxyapatite composite coating, belonging to the technical field of the improvement for medical titanium materials. According to the titanium dioxide nanotube / hydroxyapatite composite coating used for medical porous titanium, porous titanium is taken as a substrate, a composite coating is distributed on the inner surfaces and the outer surfaces of hole structures of porous titanium, and specifically, the composite coating is composed of a titanium dioxide nanotube and hydroxyapatite deposited on the titanium dioxide nanotube. The titanium dioxide nanotube / hydroxyapatite composite coating used for medical porous titanium is uniform and compact, and has strong interface bonding strength, as well as good biological activity and good compatibility. The invention further provides the preparation method of the composite coating which is characterized in that a preparation process is simple, the period is short, and the operability is strong.

The invention discloses a method for preparation of a BP (black phosphorene) modified electrode and detection of rutin. The method comprises specific steps as follows: (1), poly(3,4-ethylenedioxythiophene) / polystyrene sulfonate (PEDOT:PSS) is taken as a protective agent and mixed with BP, and a BP-PEDOT:PSS composite material is prepared; (2), the BP-PEDOT:PSS composite material prepared in the step (1) is applied to the surface of a glassy carbon electrode (GCE) through coating and is air-dried, and the modified electrode BP-PEDOT:PSS / GCE is obtained; (3), electrochemical behaviors of rutin are researched by utilizing BP-PEDOT:PSS / GCE as a working electrode, and electrochemical parameters of related electro-catalytic reactions are calculated; (4), an electrochemical sensitivity detection method of rutin is established with differential pulse voltammetry, linear ranges are 0.02-15.0 mu mol / L and 15.0-80.0 mu mol / L, and limit of detection is 0.007 mu mol / L (3sigma). The modified electrode is successfully applied to determination of rutin tablet samples.

The invention provides a preparation method of a proportion-controllable phosphorus-doped MoS2-loaded graphene nanosheet, comprising the steps of preparing graphene oxide; preparing MoS2-loaded graphene by using a hydrothermal method to load Mo source on the graphene oxide; and adopting a gas phase deposition method for doping phosphorus onto the MoS2-loaded graphene to obtain the phosphorus-dopedMoS2-loaded graphene nanosheets. The nanosheet has excellent energy storage performance when used for the electrode material of a sodium ion battery.

The invention discloses black phosphorene aerogel as well as a preparation method and application thereof. The aerogel is inorganic aerogel being of a three-dimensional network structure, and is prepared by means of freeze drying on two-dimensional black phosphorus nanosheets which are dispersed in an organic solvent under ultrasonic assistance. Compared with the conventional aerogel preparation method, the preparation method has the advantage that the aerogel can be formed by means of self-crosslinking assembly among two-dimensional black phosphorus nanosheet layers without use of any chemical crosslinking agent. The preparation process is simple in steps, is convenient to operate, is short in time and efficient, and does not cause pollution on the environment and the material surface. The black phosphorene aerogel has lower density, higher porosity, larger specific surface area and higher photothermal conversion characteristic. The prepared black phosphorene aerogel brings the superior characteristics of black phosphorene and aerogel into full play, and has a very high application prospect in the field of adsorption and energy storage materials.

The invention discloses high-stability two-dimensional black phosphorene as well as a preparation method and an application thereof, relates to the preparation method of the two-dimensional ultrathinblack phosphorus by taking an organic solvent rich in hydroxyl functional groups as a source and introducing hydroxyl through ultrasonic liquid-phase stripping, and belongs to the technical field of preparation methods of two-dimensional materials. The material is modified, and the hydroxyl functional groups are introduced to the surface of black phosphorus by using the organic solvent, so that black phosphorus can also stably exist in air. At present, the organic functional group is introduced by the organic solvent to modify the surface of ultrathin black phosphorus, blocky black phosphorusis stripped to be not more than 2 nm, and the stability and catalytic activity can be improved.

The invention discloses a phosphorene-graphene composite material and a preparation method thereof. The phosphorene-graphene composite material is a porous foam material formed by compositing of phosphorene and graphene. The preparation method includes: subjecting phosphorene and graphite oxide to vacuum ball milling, and adding into dispersion liquid to disperse to obtain phosphorene and graphite oxide mixed suspension; soaking a porous matrix into the mixed suspension, heating in shielding gas to 500-1100 DEG C, and keeping the temperature for 1-48 hours to obtain a precursor of the phosphorene-graphene composite material; soaking the precursor of the phosphorene-graphene composite material into acid liquid to remove the porous matrix, so that the phosphorene-graphene composite material is obtained. The phosphorene-graphene composite material gives full play to dual advantages of phosphorene and graphene and is great in electricity conductivity, heat conductivity, stability and flexibility, large in specific surface area and excellent in mechanical performance, high yield and high product quality are achieved, and the preparation method is simple, easy in operation and low in equipment requirement.

A quantum dot luminophore comprising at least one luminescent core, a spacer layer, an encapsulation layer, and a plurality of quantum dots is disclosed. The luminescent core is designed to emit a red light after being excited by an incident blue light, and the quantum dots are configured to irradiate a green light by the illumination of the blue light and / or the red light. In the present invention, the quantum dots are particularly used to cover or surround the luminescent core for solving the light re-absorption. By such arrangement, even though part of incident blue light (about 10-30%) may be reflected by the luminescent core made of phosphor materials, the reflected blue light still can also be recycled by the quantum dots surrounding the luminescent core, such that the light conversion efficiency and emission intensity of the luminescent core are hence increased because the loss of blue light is decreased.

The invention discloses a long glass fiber reinforced flame-retardant ABS composite material and a preparation method thereof. The composite material comprises polycarbonate, ABS, a flame retardant material, modified fibers, modified graphene oxide and other components, and the surface of the modified graphene oxide is treated with a silane coupling agent, so that the compatibility of the grapheneoxide and matrix components (polycarbonate and ABS) is improved, the graphene oxide and the matrix components can be uniformly dispersed in a system, the modified fiber is mainly prepared from blackphosphorene, dopamine, absolute ethyl alcohol and pretreated fiber, the pretreated fibers are glass fibers with carbon nanowires growing on the surfaces, and the glass fibers are continuous glass fibers. By utilizing the synergistic effect of the aluminum hydroxide, the magnesium hydroxide, the polysiloxane, the modified graphene oxide and the black phosphorene, the ABS composite material has excellent flame retardance, and is low in smoke, low in toxicity and higher in practicability during combustion.

The invention discloses a macroscopic-quantity preparation method of phosphorene. The macroscopic-quantity preparation method comprises the following steps: (1) preparing liquid; (2) peeling; (3) centrifugally separating; and (4) filtering and washing. For the existing dilemma of difficulty in large-scale preparation of non-defective phosphorene, the method uses equipment with continuous operation, namely high-pressure homogenizer, so that when passing through a homogenizing cavity, materials are acted by mechanical forces such as high-speed shearing, high-frequency oscillation and convection impact and corresponding heat effect simultaneously, so that the peeling effect is good. The method has the characteristics of high equipment utilization rate, large productivity, stable process parameters, easiness in implementation of automatic operation and the like, can guarantee the product quality and also can realize industrial-scale preparation. The phosphorene prepared by adopting the method has good application prospect in the fields of photoelectron, energy storage, catalysis and the like.