92results about How to "Strong light absorption" patented technology

The invention provides a composite shape-stabilized phase change material with light absorption and conductive properties and a preparation method thereof. The material consists of 5-15 percent of porous carbon material and 85-95 percent of organic phase change material distributed in the porous carbon material, wherein the organic phase change material is distributed in the porous carbon material. The method comprises the following steps of: preparing a carbon material with the three-dimensional communicating porous property; heating and fusing the organic phase change material and casting the organic phase change material on the porous carbon material; shocking the mixture at the temperature of 100-120 DEG C for a certain time so as to uniformly distribute the organic phase change material in the porous carbon material; and grinding the mixture at room temperature, and pressing and forming the material in a die. The composite shape-stabilized phase change material has high heat conduction, light absorption and conductivity; the heat transfer efficiency of the phase change material can be obviously improved; and meanwhile, the solar energy and electric energy can be converted into heat energy at high efficiency and are stored in the phase change material, and the material is a photoelectric composite shape-stabilized phase change material.

The invention provides a non-fullerene solar energy cell acceptor material based on multiple condensed rings, a preparation method and an application thereof. A chemical structural formula of the acceptor material is shown in a specification, wherein X is selected from one of the following groups: Y is selected from one of the following groups: A is an acceptor unit having a pi-conjugated structure, and is respectively selected from the following groups. According to the non-fullerene solar energy cell acceptor material, the effective conjugation length is increased, at the same time, recombination performance is reduced, charge mobility is increased, good visible light near infrared area luminous absorption is guaranteed, electron mobility of the material is obviously increased, and the photoelectric conversion efficiency of an organic solar energy cell is greatly increased.

The invention relates to a preparation method and applications of a graphene sheet vertically oriented thin film material, and belongs to the field of functional materials. According to the preparation method, a graphene oxide solution obtained via pre-production is uniformly mixed with an antifreezing agent; an obtained mixture is delivered into a polytetrafluoroethylene container, and then the bottom of the polytetrafluoroethylene container is placed on the surface of liquid nitrogen immediately so as to realize orientation freezing from bottom to top and obtain a hydrogel of the graphene sheet vertically oriented thin film material; the hydrogel is subjected to freeze drying so as to obtain an aerogel of the graphene sheet vertically oriented thin film material; under argon protection, the aerogel is subjected to annealing so as to obtain the graphene sheet vertically oriented thin film material. The preparation method is simple; operation is convenient; the preparation method is suitable for large-scale production; the obtained graphene sheet vertically oriented thin film material possesses highly ordered channels beneficial for water molecule transmission and evaporation; and the graphene sheet vertically oriented thin film material can be used for realizing high efficiency solar energy seawater desalination, and water cleaning of concentrated acid, concentrated alkaline, and heavy metal solution.

A light-sensitive coloring agent as a ruthenium metal complex which is shown as the formula (1).

The present invention relates to a room temperature nitrogen dioxide sensor preparation method based on a reduced graphene-semiconductor. The preparation method comprises: adding graphite and NaNO3 into H2SO4, adding KMnO4, carrying out a reaction in a constant temperature water bath pot, adding deionized water, terminating the reaction, adding a H2O2 solution and hydrochloric acid to obtain an oxidized graphene suspension, dissolving inorganic salt powder in deionized water, adding the obtained solution to the oxidized graphene suspension, drying in a high pressure kettle to obtain corresponding powder, preparing an interdigital electrode and a wiring terminal on the front surface of a substrate by using a monocrystal silicon wafer Si as an insulating substrate, and preparing a reduced graphene-semiconductor composite coating just above the interdigital electrode. According to the present invention, the defects of sensor power consumption increasing, sensor service lifer shortening, detection safety risk increasing and the like in the prior art are overcome with the preparation method of the present invention; and the characteristics of large specific surface area, fast electron transport, good light absorption, fast response, fast recovery and lower working temperature of the reduced graphene are utilized.

The invention discloses a preparation method of an ultra-black coating with a nano-pore structure. The preparation method comprises the following steps of: cleaning and activating a metal matrix material, plating the cleaned and activated metal matrix material in a chemical plating solution to deposit a nickel phosphorus carbon alloy coating on the metal matrix material, wherein the chemical plating solution comprises nickel sulfate, sodium hypophosphite, a buffer agent, a complexing agent and a carbon black, and the particle size of the carbon black is 20-60mm, and chemically etching the nickel phosphorus carbon alloy coating on the surface of the metal matrix material using an etching acid solution. A plurality of nanometer conical pores different in sizes are uniformly distributed in the surface of the ultra-black coating prepared by the preparation method, nano-pores which are smaller in pore diameters are filled in the inner surfaces of the nanometer conical pores and in the plane areas between the adjacent conical pores, the light reflectivity of the ultra-black coating within a 400-2000 light wavelength range is less than 0.12%, and the ultra-black coating has light absorption performance better than that of the light absorbing coating obtained by carrying out conventional chemical etching on a Ni-P alloy.

The invention discloses a preparation method and application of an aerogel-polypyrrole photo-thermal conversion material. Chitosan and PVA are used as substrates; the aerogel-polypyrrole photo-thermalconversion material is obtained by preparing chitosan aerogel, adding pyrrole, carrying out in-situ polymerization on FeCl3 and uniformly attaching the FeCl3 to the chitosan aerogel, the aerogel-polypyrrole photo-thermal conversion material is stable in structure, has excellent hydrothermal conversion performance and light absorption performance, can be used as a photo-thermal conversion material, and is applied to occasions such as sea water desalination and sewage treatment.

The invention discloses an organic conjugated small molecular material with a terminal group containing a naphthenic chain as well as a preparation method and application thereof to solar cells, and belongs to the technical field of organic solar cells. The terminal group of the organic conjugated small molecular material contains the naphthenic chain with higher rigidity, so that self-assembly and stacking between molecules are facilitated, the photovoltaic performance of the small molecular material is improved, and the heat stability of the small molecular material is good; moreover, he small molecular material has high light absorption property and has appropriate energy levels and can be dissolved in organic solvents such as chloroform, dichloromethane, tetrahydrofuran and chlorobenzene, and is suitable for being used as an organic solar cell material. The organic conjugated small molecular material disclosed by the invention as a light-captured active layer receptor material is applied to the organic solar cells and has higher photoelectric conversion efficiency.

The invention discloses a hybrid material based on a macrocyclic compound photosensitive dye and titanium dioxide and a preparation method thereof, and application of the hybrid material to photocatalysis. The hybrid material comprises the macrocyclic compound photosensitive dye and titanium dioxide, wherein the macrocyclic compound photosensitive dye is a calixarene compound or porphyrin compound. The invention also discloses the preparation method for the hybrid material based on the macrocyclic compound photosensitive dye and titanium dioxide, and application of the hybrid material to photocatalysis. The organic-inorganic hybrid material prepared from the macrocyclic compound photosensitive dye and titanium dioxide has a hierarchical porous structure, and can improve the free diffusionof gas and surface adsorption of CO2, increase the adsorption quantity and activation degree of reactants, reduce the possibility of electron-hole recombination and effectively enhance photocatalysisefficiency. Moreover, the hybrid material of the invention has high stability and is improved in cyclic utilization stability in photocatalysis.

The invention discloses a serum total bile acid detection reagent with stable and strong anti-interference capability and belongs to the technical field of clinical in-vitro detection. The serum total bile acid detection reagent adopts a novel MES and HEPES biological buffer system, and a novel ampholytic surfactant cocamidopropyl betaine and a non-ionic surface active agent alkyl glycoside are added, so that the anti-interference capability and stability of the serum total bile acid detection reagent are greatly improved; besides, gamma-Fe2O3 nano particles are also added in a component R2 of the serum total bile acid detection reagent, and the gamma-Fe2O3 nano particles have a special nanometer effect and biological enzyme activity characteristics, so that activities of NADH and 3alpha-HSD enzyme in the serum total bile acid detection reagent can be effectively improved, reaction is catalyzed, and the accuracy degree of analysis and detection is improved. Therefore the serum total bile acid detection reagent can be used for detecting the content of serum total bile acid and has strong anti-interference capability and good stability.

The invention discloses a preparation method for a copper / cuprous oxide cladded paraffin microcapsule photothermal conversion phase-change energy-storage composite material by a hydrothermal method, wherein the preparation method comprises the steps: mixing sliced paraffin and oil amine, and stirring evenly at the temperature of 65-85 DEG C to obtain a paraffin-oil amine mixture; dissolving a reducing agent glucose and a copper source in deionized water, and mixing evenly and dropwise adding into the paraffin-oil amine mixture, and under a condition of the temperature of 65-85 DEG C, stirringevenly to obtain a reaction mixture; and placing the obtained reaction mixture in a high pressure reaction kettle, carrying out a reaction for 6-24 h at the temperature of 120-150 DEG C, centrifugingthe obtained reaction liquid, washing with deionized water, drying for 12 h at the temperature of 50 DEG C, and thus obtaining copper / cuprous oxide cladded paraffin microcapsule photothermal conversion phase-change energy-storage microcapsules. The preparation method is simple and low in cost; paraffin is cladded by copper with high thermal conductivity coefficient and cuprous oxide with high light absorbability; the prepared microcapsules have a uniform particle size less than 3 microns, and have good thermal conductivity and excellent light absorbability.

The invention relates to a preparation method of bamboo-like nitrogen-doped carbon nanotubes loaded with metal monoatoms and nanoparticles. The method comprises the following steps of: adding 2-methylimidazole, metal salt, a zinc-containing compound and grinding balls into a ball milling tank, and carrying out ball milling for 2-8 hours to obtain a mixture containing ZIFs single crystals; and placing the mixture containing ZIFs single crystals in a quartz boat, heating the mixture to 800-1100 DEG C from room temperature at a speed of 2-5 DEG C min <-1 > in a tubular furnace, maintaining the temperature for 1-3 hours, and naturally cooling to room temperature to finally obtain bamboo-like nitrogen-doped carbon nanotubes loaded with metal monoatoms and nanoparticles. The steps of washing, separating and the like are not needed, the method has huge potential application value in the fields of photo-thermal catalysis, concerted catalysis and the like, and the application range of the method in the catalysis field is widened.

The invention discloses indoline-dithienoquinoxaline-dibenzo[a,c]phenazine dye and application of the dye to a dye-sensitized solar cell. The dye is a D-A-pi-A pure organic dye, wherein an indoline group is taken as an electron donor; a dithienoquinoxaline group and a thiophene group are taken as pi bridges; a cyanoacetic acid group is taken as an electron donor as well as an anchoring group; meanwhile a dibenzo[a,c]phenazine group is taken as an electronic assisted donor. The dibenzo[a,c]phenazine assisted electronic donor is introduced into dye molecules, so that the conjugacy of the dye molecules is enhanced, and the molecular orbital energy level is regulated; intramolecular electron transfer is promoted through a rigid plane of conjugated big pi-bridge dioctyl dithienoquinoxaline, andthe accumulation of the dye is restrained through an alkyl chain, so that the spectrum response range is expanded effectively, and the electronic life is prolonged; the dye has good light absorptioncapability; the dye-sensitized solar cell based on the dye can obtain big photocurrent, so that relatively high photoelectric conversion efficiency is achieved.

The invention provides a niobium-doped bismuth oxybromide catalyst and a preparation method and a use method thereof. The preparation method comprises the following steps: 1, heating an alcohol solvent until the alcohol solvent is boiled, and naturally cooling, 2, sequentially adding a bismuth salt compound, a niobium compound and a bromine compound, mixing and fully stirring, 3, adding a neutralsolution, 4, carrying out high-pressure constant-temperature reaction, and 5, cooling to room temperature, carrying out centrifugal separation, respectively washing with water and an ethanol solution,drying, and collecting the powder to obtain the flower-ball-shaped niobium-doped bismuth oxybromide. The photocatalyst prepared by the preparation method disclosed by the invention is Nb-BiOBr, the photocatalyst has good visible light photocatalytic degradation organic matter performance, higher photocatalytic activity and photo-induced electron hole separation efficiency, the degradation efficiency of the photocatalyst is 6.4 times that of BiOBr in the prior art, and the photocatalyst is environmentally friendly, harmless, low in price, controllable in method and easy to operate and has wideapplication prospects in the field of environmental pollution and governance.

The present invention discloses a TiO2 / GQDs / NiS heterojunction photoanode and a preparation method thereof, solving the existing problem of relative low photoelectric conversion efficiency of TiO2. The method comprises the following steps: taking a titanium piece as a substrate, taking ethylene glycol and an ammonium fluoride aqueous solution containing graphene quantum dots (GQDs) as an electrolyte, and preparing a TiO2 composite film containing GQDs by using an anodic oxidation method; depositing NiS nanoparticles on the surface of the TiO2 via a successive ionic layer adsorption-precipitation reaction; and performing annealing reaction for 2 hours in a tube furnace under nitrogen atmosphere to obtain a TiO2 / GQDs / NiS composite photoanode. The photocurrent density of the TiO2 / GQDs / NiS (dipping 8 times) composite film is 2 times of the photocurrent density of a TiO2 nanotube. The method has the advantages of simplicity and easiness for operation, and the TiO2 / GQDs / NiS composite photoelectrode prepared by using the method has high photocatalytic activity and stability.

The invention discloses a method for preparing a composite biomass airgel light-to-heat conversion material. The discarded biomass material is recycled, carbonized, ground and sieved, and then mixed with a chitosan solution to prepare a light-to-heat conversion airgel. The composite material has a simple preparation process and low cost. The obtained material is non-toxic, degradable, and environmentally friendly. It has high solar steam efficiency and meets the requirements of sustainable development today. It can be used for seawater desalination and sewage treatment, and has wide application prospects.

The invention discloses an Ag2S / SnS2 heterojunction photocatalyst and a preparation method thereof. The preparation method comprises the following steps: synthesizing SnS2 nanosheets through a hydrothermal technology, adding silver ions into an aqueous solution containing the SnS2 nanosheets, and carrying out an ion exchange reaction on the silver ions and tin disulfide to obtain the Ag2S / SnS2 heterojunction composite photocatalyst. The combination of Ag2S nanoparticles and the SnS2 nanosheets significantly enhances the photoelectric properties and the photocatalytic properties of the Ag2S nanoparticles and the SnS2 nanosheets, and the photovoltaic density of the Ag2S(8wt%) / SnS2 compound is 2 times that of the SnS2. The methyl orange photocatalytic degradation activity of the heterojunction is obviously better than that of the Ag2S and the SnS2 nanosheets. The method has the advantages of simplicity in operation, mild conditions and high yield; and the prepared SnS2 ultrathin nanosheets have very high photocatalytic activity.

The invention discloses a preparation method of a high-temperature-resistant light absorption coating. The preparation method comprises the following steps: (1) dispersing a nano carbon material, a surface modifier, a matting material, aromatic diamine and aromatic dianhydride in an organic solvent to prepare a composite suspension; (2) carrying out surface roughening treatment after the substrate is cleaned; and (3) depositing the composite suspension liquid obtained in the step (1) on the substrate treated in the step (2) in an aerial fog spraying or brushing manner, and heating and curing to obtain the high-temperature-resistant light absorption coating. According to the invention, by adjusting the types and proportions of the components in the composite suspension and combining with adaptive spraying process parameters, the components in the suspension can have a synergistic effect, so that the coating has a micro-nano porous structure and also has good mechanical properties. The high-temperature-resistant light absorption coating prepared by the method is good in binding force with a substrate and excellent in light absorption performance, and has a wide application prospect in the fields of optics, navigation and the like.

The invention provides a photocatalytic material and a preparation method and application thereof. According to the photocatalytic material, nano titanium oxide covers a gold nano rod to form a core-shell structure; the nano titanium oxide is chemically bonded with modifying molecules on the surface of the gold nano rod to cover the surface of the gold nano rod. According to the photocatalytic material, organic molecules containing sulfydryl and carboxyl modify the whole surface of the gold nano rod, to prepare nano titanium oxide; under the mutual action between a modifying molecule group on the surface of the gold nano rod and a surface group of the nano titanium oxide, the nano titanium oxide covers the gold nano rod, to obtain the photocatalytic material with the core-shell structure. The thickness of the coverage layer of the nano titanium oxide in the photocatalytic material with the core-shell structure is adjustable, so that the structure is stable and the light absorption performance is excellent; furthermore, the preparation method is simple, the reaction conditions are mild, and environment friendliness is realized; the photocatalytic material is expected to be applied to various aspects such as photocatalysis, solar batteries, and photoelectric conversion, and has a wide application prospect.

The invention discloses blacking and its preparation method. The blacking comprises the following components by weight: 5-10 parts of carnauba waxes, 2-5 parts of stearic acid, 10-20 parts of ceresin, 5-10 parts of crude montan waxes, 80-100 parts of turpentine, and 1-5 parts of oil-soluble aniline black. The raw materials are subjected to heating melting, mixing, stirring, cooling and other steps so as to obtain the blacking, which can endow leather shoes with a uniform color and good glossiness when used for shoe polishing, and is environment-friendly and free of stimulating smell.

The invention relates to a three-dimensional porous MXene assembly, a preparation method and application thereof, and relates to the field of landfill leachate treatment. The preparation method of thethree-dimensional porous MXene assembly comprises the steps of: adding an AgNO3 solution with a concentration of 10-50mg / mL into an MXene aqueous dispersion with a concentration of 0.5-10mg / mL to obtain an Ag / transition metal oxide / MXene dispersion, wherein the mass ratio of AgNO3 to MXene is 1:10-2:1; and mixing the obtained Ag / transition metal oxide / MXene dispersion liquid with a sodium alginate solution with a concentration of 1-10mg / mL, performing stirring, then putting the mixture into a mold filled with a metal ion cross-linking agent, carrying out cross-linking reaction, freezing the cross-linked product in liquid nitrogen for 5-20min, and carrying out vacuum freeze drying to obtain the three-dimensional porous MXene assembly. The obtained assembly has a three-dimensional porous foam structure, and is large in specific surface area, good in hydrophilicity and excellent in light absorption performance.

The invention discloses a random copolymer with difluorobenzothiadiazole and quaterthiophene as a main chain as well as a preparation method and application of the copolymer. According to the invention, random copolymerization is carried out by changing a way that two adjacent thiophene substituent groups of difluorobenzothiadiazole are combined according to length, so that a corresponding randomcopolymer is obtained. The prepared random copolymer with the difluorobenzothiadiazole and quaterthiophene as the main chain has good light absorbing property and solution processability, a light absorbing active layer oriented to a polymer solar cell can be produced, and the polymer solar cell can have high energy conversion efficiency. The prepared random copolymer with the difluorobenzothiadiazole and quaterthiophene as the main chain can enable the polymer solar cell to have good thermal stability, and an alternate copolymer adopting a long side chain cannot enable the polymer solar cell to obtain the same thermal stability.

The invention belongs to the field of photoelectric detectors, and particularly discloses a field effect transistor photoelectric detector based on dielectric layer response, which comprises a grid electrode, a photoelectric response composite dielectric layer, a carrier transport layer, a source electrode and a drain electrode. The composite dielectric layer is formed by compounding a photoelectric response medium and a charge blocking insulating medium; the carrier transmission layer is used for transmitting electrons or holes, the photoelectric response medium is used for absorbing light under illumination to generate electrons, holes or excitons, and the charge blocking insulating medium is used for limiting passing of the electrons, the holes and the excitons; the generation of photo-induced electrons, holes or excitons in the composite dielectric layer and the movement of the photo-induced electrons, holes or excitons limited in the photoelectric response medium cause the change of the effective dielectric constant of the composite dielectric layer and cause the change of the carrier concentration and conductivity of the carrier transport layer, and photoelectric detection is realized according to the change of the current between the source electrode and the drain electrode before and after illumination. According to the invention, the design flexibility of the photoelectric detector is obviously improved, and the photoelectric detector with high performance and low cost can be further realized.

The invention relates to an organic conjugated small molecular material containing thianthrene end groups and a preparation method thereof. The end group of the organic conjugated small molecular material contains thianthrene groups, and the organic conjugated small molecular material has a large conjugated area and sulfur atom substituent groups, so that intermolecular self-assembly and accumulation are facilitated, and the photovoltaic performance of the small molecular material is further improved. The invention is good in thermal stability, good in light absorption and proper in energy level, and can be dissolved in organic solvents such as chloroform, dichloromethane, tetrahydrofuran and chlorobenzene; the invention is suitable for preparing organic solar cell devices by solution processing. The material is used as an electron acceptor material, can be applied to organic solar cell devices, and can achieve a good device effect.

The invention provides an ultraviolet light detecting transistor based on a graphene / C60 composite absorbing layer. The transistor comprises a gate metal layer, a highly doped silicon gate, a gate dielectric layer, and a graphene / C60 composite absorbing layer, wherein the gate metal layer, the highly doped silicon gate, the gate dielectric layer, the graphene / C60 composite absorbing layer are successively arranged from bottom to top. The highly doped silicon gate and the gate dielectric layer simultaneously support the graphene / C60 composite absorbing layer film as the substrate of the whole transistor device. The graphene / C60 composite absorbing layer is composed of a single layer or multiple layers of graphene and the C60 with a certain thickness. The graphene is arranged at the lower end of C60 and is furthermore used as a C60 growth template, wherein the graphene contacts with the gate dielectric layer. Two ends of the graphene layer are respectively provided with a source electrode and a drain electrode. The graphene interacts with the C60 through a Van der Waals force, thereby forming a hetero junction transistor with an ultraviolet absorbing characteristic. Array integrationcan be performed on a plurality of ultraviolet light detecting transistors. The invention provides a specific plan of the array system for spectrum detection analysis and image identification.

The invention discloses a wide-spectrum extremely-low transmission structure and a preparation method thereof. The wide-spectrum extremely-low transmission structure comprises a substrate, and furthercomprises a nano forest structure directly formed on at least one surface of the substrate, and metal nano particles loaded on the nano forest structure; when only one surface of the substrate is ofa nano forest structure, a metal layer is arranged on the other surface, opposite to the nano forest structure, of the substrate. The structure provided by the invention has the advantages of high stability and high light absorption capability.

The invention relates to the technical field of wastewater treatment, in particular to a device and a method for treating high-concentration organic wastewater by cooperation of electrochemistry and photocatalysis. A substrate made of a conductive material is coated with a C3N4 / macroporous carbon composite, then the high-concentration organic wastewater is treated by cooperation of electrochemistry and photocatalysis, and the device has the characteristics of being simple in structure, high in wastewater purification efficiency and capable of recycling useful gas.

The invention discloses a near infrared absorption organic dyestuff based on alkynyl triphenylamine and perylene diimide and a preparation method and application thereof. The organic dyestuff takes alkynyl triphenylamine and perylene diimide as raw materials, and is prepared by adopting Sonogashira reaction; the preparation method is simple and mild in condition, and simultaneously, compared withperylene diimide, the prepared and obtained organic dyestuff obviously changes the distribution of LUMO and HOMO of perylene diimide. The energy levels of LOMO and HOMO of perylene diimide and the energy level difference between LOMO and HOMO of perylene diimide are changed, so that the UV absorption spectrum of the organic dyestuff is of great red shift and almost cover the whole visible light region, and the applied range in the photoelectric field is effectively improved.

The invention discloses a GQDs / SnS2 heterojunction photocatalyst and a preparation method thereof. A simple one-step hydrothermal method comprises the following steps: adding a graphene quantum dot into an aqueous solution containing a sulfur source and stannic chloride (the molar ratio of the sulfur source to the stannic chloride is 2.2 to 1); performing a hydrothermal reaction at the temperature of 120 to 180 DEG C for a certain while to obtain the GQDs / SnS2 heterojunction photocatalyst. Through combination of GQDs and a SnS2 nanosheet, the photoelectric performance and photocatalytic performance of the GQDs and the SnS2 nanosheet are enhanced remarkably, and the photo-generated current density is 5 times that of pure SnS2. The activity in heterojunction photocatalytic degradation of methylic orange is superior to that of the SnS2 nanosheet. The method is easy and convenient to operate, is mild in conditions, and has high yield; the prepared GQDs / SnS2 ultrathin nanosheet has very high photocatalytic and photo-electrochemical oxygen evolution capabilities.

The invention discloses mildew-proof shoe-blacking, which is characterized by comprising the following components in parts by weight: 5-10 parts of nitrobenzene, 2-5 parts of oxidized polyethlene wax, 5-10 parts of crude montan wax, 20-30 parts of turpentine oil, 1-5 parts of oil-soluble aniline black, 10-20 parts of ozokerite and 5-10 parts of mildew-proof agent. The mildew-proof shoe-blacking is fast in volatilization, difficult to grey and good in gloss when being coated on leather shoes and can prevent the leather shoes from mildewing. The mildew-proof agent adopted in a formula is phenol or pentachlorophenol which evenly has high anti-corrosive property, so that vamp mildewing can be effectively prevented.