24results about How to "Enhanced light absorption" patented technology

The utility model provides a photovoltaic assembly panel and a photovoltaic assembly, and belongs to the technical field of photovoltaic assemblies, a weight reduction cavity is arranged in the panel, and the weight reduction cavity penetrates through two opposite side surfaces of the panel. According to the utility model, the weight reduction cavity is arranged in the panel to reduce the weight of the panel, so that the self weight of the photovoltaic module can be reduced, the problem that the photovoltaic module is bent downwards due to the heavy weight of the panel is avoided, and the power reduction of the module due to the bending of the photovoltaic module can be further avoided; and the problem that the service life is shortened due to hidden crack defects caused by bending is solved. The weight reduction cavity is arranged in the panel, so that the panel has bending resistance, and the bending resistance of the photovoltaic module is enhanced; the weight reduction cavity is formed in the panel, refraction can be generated when sunlight irradiates, the light absorption capacity of the assembly is improved, and therefore the power of the assembly is improved; and the weight reduction cavity is arranged in the panel, so that the transportation cost and the installation difficulty of the photovoltaic module can be reduced.

The application belongs to the technical field of material preparation, and particularly relates to a light-heat material with an antireflection coating and a preparation method thereof. Micron or nanometer magnetic particles are used as the core, and inorganic materials with antireflection function are used as the functional coating to coat the surface of the magnetic particles; wherein the functional coating is metal oxide or non-metal oxide with light reflection inhibiting function. The method is simple in operation, mild in reaction condition, and the prepared material has an antireflection coating, which can reduce the energy loss in the form of diffuse reflection on the surface of the material in the light-heat conversion process, and shows high energy conversion efficiency. In addition, the coating material is stable in chemical property, so that the prepared composite particles have certain oxidation resistance, and can be widely applied in the fields of paint and water treatment chemical industry.

The application relates to the technical field of photovoltaic solar cells, and discloses a solar cell and a photovoltaic module. The solar cell comprises a silicon substrate, the silicon substrate has a first surface and a second surface arranged oppositely, a medium layer arranged on the second surface, and a doped layer arranged on the surface of the medium layer away from the silicon substrate, wherein the surface of the doped layer away from the medium layer has a plurality of submicron particles. In the application, the roughness of the doped layer can be effectively increased through the plurality of submicron particles on the surface of the doped layer away from the medium layer, the back surface reflection of the cell sheet can be reduced through the submicron particles, the light absorption capacity of the film layer can be improved, and the contact area with metal can be increased, so that the doped layer has better metal contact performance.

This invention belongs to the field of hollow multi-component nanomaterial preparation technology, specifically disclosing a hollow Cu3NbSe4 nanomaterial, its preparation method, and its application. The microstructure of the nanomaterial is a nanoscale hollow cubic structure. The preparation method includes: (1) dissolving niobium source and selenium source separately in oleylamine solvent by heating for later use; (2) treating the soluble copper source and the niobium source dissolved in (1) in a high-boiling-point organic solvent for deoxygenation and dehydration, and then carrying out a solvothermal reaction; (3) when (2) is heated to a certain temperature, injecting the selenium source dissolved in (1) to carry out a solvothermal reaction, and separating the obtained solid product after the reaction is completed. The synthesis process of this invention is simple, the reaction conditions are mild, and the energy consumption and cost are low; more importantly, it realizes the preparation of hollow Cu3NbSe4 nanomaterial with uniform morphology and size, high crystallinity, and stronger light absorption capacity, and the prepared hollow Cu3NbSe4 shows excellent performance in photocatalytic hydrogen production.

The invention relates to the technical field of photocatalysts, in particular to a nonmetal plasmon heterojunction material, a preparation method and application thereof and a method for preparing p-aminophenol through reduction of p-nitrophenol. The nonmetal plasmon heterojunction material provided by the invention comprises a C3N4 nanosheet and a WO3-x nanoplate (x is 0.1 to 0.3) positioned on the surface of the C3N4 nanosheet. The WO3-x local surface plasmon characteristic can effectively expand the spectral response range of the non-metal plasmon heterojunction material in a visible region to a near-infrared region, and the light absorption efficiency of the non-metal plasmon heterojunction material is remarkably enhanced. The nonmetal plasmon heterojunction material provided by the invention can realize efficient reduction of p-nitrophenol based on the synergistic effect of an interface heterojunction, a built-in electric field and oxygen vacancies, is high in selectivity, has excellent photocatalytic activity for reduction of p-nitrophenol, and is excellent in photocatalytic activity stability.

The invention belongs to the technical field of photocatalytic material preparation, and particularly relates to HM-UiO-66 (at) CTF / MFC aerogel and a preparation method and application thereof.The preparation method comprises the following steps that zirconium tetrachloride and 2-aminoterephthalic acid are added into an N, N-dimethylformamide solution of lauryl sodium sulfate, and stirring reaction is conducted; the preparation method comprises the following steps: dissolving sodium dodecyl sulfate in deionized water, then standing at 70-90 DEG C for 5-20 hours, then washing a solid product, removing the sodium dodecyl sulfate in the product, and drying to obtain HM-UiO-66-NH2; the preparation method comprises the following steps: placing HM-UiO-66-NH2 in an inert atmosphere, mixing the HM-UiO-66-NH2 with a chloroform solution of 4-cyanobenzoyl chloride, carrying out a stirring reaction, dropwise adding triethylamine into the mixture, and continuously carrying out a stirring reaction to obtain HM-UiO-66-CN; the preparation method comprises the following steps: mixing HM-UiO-66-CN with 4, 4 '-biphenyl formonitrile, and adding trifluoromethanesulfonic acid into the mixture to prepare HM-UiO-66 (at) CTF-2; and uniformly mixing the aqueous dispersion of the HM-UiO-66 (at) CTF-2 and the aqueous dispersion of the microfibrillated cellulose according to a ratio, and carrying out freeze-drying, so as to obtain the HM-UiO-66 (at) CTF / MFC aerogel. When the aerogel is used as a photocatalyst, the aerogel has good light absorption performance, good VOCs adsorption performance and good photocatalytic degradation efficiency.

The invention discloses an organic photo-thermal eutectic material based on crown ether derivatives and a preparation method and application thereof, and relates to the technical field of organic photo-thermal materials. Wherein the organic eutectic material is a host-guest eutectic formed by assembling an electron-rich donor molecule crown ether derivative and an electron-deficient acceptor molecule through a charge transfer effect. Compared with a single subject or object, the eutectic material has a remarkable near-infrared light absorption characteristic and can be applied to interface water evaporation. Tedious and complex molecular design and synthesis processes are avoided, the preparation process is simple and easy to implement, and meanwhile, the polyurethane foam loaded with the organic photo-thermal eutectic material shows an excellent water evaporation advantage and shows a great potential application value in the fields of seawater desalination and the like.

This invention relates to the field of nanoscale full-spectrum photocatalytic materials, and particularly to a method for preparing a molybdenum selenide / oxygen-deficient bismuth oxybromine@gold three-phase Z-type heterojunction photocatalyst. This method solves the problems of low photogenerated electron-hole separation efficiency, narrow full-spectrum response range, and poor stability in existing bismuth-based photocatalysts. The preparation method involves first preparing oxygen-deficient BiOBr nanospheres via a solvothermal method, then directly reacting tetrachloroauric acid with oleylamine in toluene to prepare small-particle-size monodisperse Au nanoparticles, which are then combined with oxygen-deficient BiOBr to prepare a BiOBr@Au nanosphere core-shell structure. Finally, a MoSe2 / oxygen-deficient BiOBr@Au three-phase composite material is prepared via a hydrothermal reaction. The catalyst of this invention exhibits absorption capacity under the full spectrum of light, and simultaneously achieves a synergistic enhancement of carrier separation efficiency and strong redox capability, demonstrating excellent photocatalytic activity and the ability to efficiently degrade pollutants and produce hydrogen.

This invention belongs to the field of solar cell technology, specifically relating to a top-down defect passivation perovskite solar cell. It includes, from bottom to top, a transparent conductive substrate, an electron transport layer, a first passivator layer, a perovskite layer, a second passivator layer, a hole transport layer, and a back electrode. The perovskite layer has an inverse opal structure, comprising perovskite and spherical pores. Several layers of spherical pores are arranged sequentially from top to bottom within the perovskite layer, with several pores per layer. This invention utilizes the three-dimensional continuous through-holes of the inverse opal perovskite structure to promote the penetration of the passivator to the buried interface, thereby achieving overall defect passivation of the perovskite bulk phase and the perovskite / carrier transport layer interface. Furthermore, the slow-light effect of the inverse opal structure helps to prolong the interaction time between incident light and the perovskite, enhancing light absorption performance. Ultimately, a perovskite solar cell with high photoelectric conversion efficiency and good long-term stability is obtained.

The application discloses an ultrablack coating with wide-angle absorption and a preparation method and application thereof, and belongs to the technical field of ultrablack coatings and preparation thereof. The application solves the problem that the existing ultrablack coating cannot present extremely low scattering and high absorption under large-angle incident light. In the application, carbon black is used as an absorbent, a high-temperature-resistant silica sol solution is used as a binder, and a one-step sintering method is adopted to form a stable structure and construct an ultrablack coating with a forest-like light trap array structure. The forest-like array structure on the surface of the ultrablack coating significantly changes the refractive index of the coating surface, thereby reducing the surface optical reflection; the surface forest-like light trap structure is closely arranged, can make the light incident from each angle to reflect back and forth in the structure, and then maximally absorbs the incident light, realizes stable high light absorption under wide angles, makes the reflectivity of the ultrablack coating not obviously change with the angle of incident light, and improves the deep space exploration precision of a space optical system.

The invention discloses a preparation method of a Fe3O4 and plant polyphenol composite biomass-based photo-Fenton catalyst, belongs to the technical field of environmental catalytic materials, and relates to a preparation method of a biomass-based photo-Fenton catalyst. The invention aims to solve the problems of complex preparation process and high cost of the existing iron-based catalyst. The preparation method of the Fe3O4 and plant polyphenol composite biomass-based photo-Fenton catalyst comprises the following steps: 1, pretreating a biomass raw material; 2, loading iron species; 3, alkali precipitation; 4, reduction and nucleation; 5, circularly dipping and strengthening; and 6, post-treatment: collecting a product through magnetic separation, washing the product with pure water for five times, and drying the product to obtain the Fe3O4-plant polyphenol composite biomass-based photo-Fenton catalyst. The preparation method is simple and low in cost.

The application discloses a method for in-situ reduction synthesis of a plasma heterojunction material and application of the plasma heterojunction material in piezoelectric-photocatalytic degradation of dye wastewater. 12 The heterojunction catalyst can realize high-efficiency catalytic conversion through electronic mechanical coupling and solar-induced photogenerated carriers. When the material is applied to MB dye degradation, high piezoelectric-photocatalytic activity is exhibited. Compared with a piezoelectric or photocatalytic method alone, piezoelectric-photocatalysis is a high-efficiency environmental purification technology. In addition, the metal titanium template is first recycled for synthesis of the Bi / BTO catalyst, which is beneficial to commercial-scale application and industrial production.

The application discloses a preparation method of Cu / PDI composite material, which comprises the following steps: step 1, 0.3993g Cu(CH3COO)2.H2O is added into 21mL DMF aqueous solution with a volume fraction of 14%-100%, and stirring is conducted to completely dissolve the Cu(CH3COO)2.H2O, so as to obtain solution A; step 2, 1g PVP is added into the solution A, initial stirring is conducted, then 3.993-35.937mg PDI is added, and continuous stirring is conducted, so as to obtain solution B; and step 3, the solution B is transferred into a polytetrafluoroethylene reaction kettle, the reaction kettle is placed into a drying box, reaction is carried out at 140-180 DEG C for 5-8h, the reaction kettle is cooled to room temperature, and the product C is collected, and then washing and vacuum drying are sequentially conducted, so as to obtain the Cu / PDI composite material, the near-infrared light absorption intensity of the Cu / PDI composite material is enhanced, and the Cu / PDI composite material has excellent photocatalytic activity.

The application provides a BC battery and a preparation method thereof. The BC battery comprises a silicon substrate, the silicon substrate has opposite front and back surfaces, the front surface is provided with a front surface passivation layer, an anti-reflection layer and a patterned protective layer which are sequentially stacked, the patterned protective layer has a discontinuous structure, the back surface is provided with a P region and an N region, and the P region and the N region are provided with metal gate lines. By arranging a patterned protective layer on the front surface of the silicon substrate, the problem of scratch on the front surface of the battery is solved, the reflection of the front surface light is reduced, and the light absorption effect is improved.

The application discloses a visible light detector and a preparation method thereof. The structure of the visible light detector comprises InGaN nanorods grown on a silicon substrate, a first metal electrode located on the silicon substrate, a mixed solution of gold nanoparticles and PEDOT:PSS covering the surface of the InGaN nanorods, and a second metal electrode located on the InGaN nanorods covered with the mixed solution of gold nanoparticles and PEDOT:PSS. The introduction of PEDOT:PSS can effectively passivate the surface state of the InGaN nanorods and reduce the dark current. The introduction of gold nanoparticles can induce surface plasmon effect and improve the light response current. Compared with the detector without the mixed solution of gold nanoparticles and PEDOT:PSS, the detector has higher photoelectric current and lower dark current. The application has the advantages of low cost, excellent performance and simple preparation, and the visible light detector and the preparation method thereof can be applied to the field of visible light communication.

The invention relates to the technical field of semiconductor optoelectronic materials, in particular to a heterojunction photoelectric material based on the in-situ self-reduction surface plasma resonance effect, a preparation method and application, and the technical points are as follows: MoS2 quantum dots are deposited on a substrate, and a Cs2AgBiI6 nanosheet with a selectively exposed (100) crystal face is prepared by a low-temperature solvothermal method to obtain a Cs2AgBiI6 (100) nanosheet; cs2AgBiI6 (100) nanosheets are deposited on a MoS2QDs-substrate through a spin-coating method to prepare a Cs2AgBiI6 (100) / MoS2 QDs-substrate, a reducing agent is sprayed on the surface of the Cs2AgBiI6 (100) / MoS2 QDs-substrate, Ag elementary substances are generated through in-situ reduction, the heterojunction photoelectric material is obtained, an all-inorganic heterojunction system is constructed, the plasma resonance effect is introduced, and collaborative improvement of wide spectral response, high sensitivity, rapid response and high stability is achieved.

The invention provides a TiN / N-TiO2 photocatalytic composite material for producing hydrogen by decomposing water as well as a preparation method and application of the TiN / N-TiO2 photocatalytic composite material, and belongs to the technical field of hydrogen production. The preparation method comprises the following steps: calcining rutile phase N-TiO2 powder in a mixed atmosphere of hydrogen and inert gas, so as to obtain the TiN / N-TiO2 photocatalytic composite material. According to the preparation method, the TiN / N-TiO2 heterojunction photocatalyst with the lattice matching heterogeneous interface is successfully prepared. The separation and transfer efficiency of photon-generated carriers in TiN / N-TiO2 can be improved by forming the lattice matching heterogeneous interface. Meanwhile, the light absorption capacity of the TiN / N-TiO2 in the range of 3002000 nm is obviously enhanced. Finally, TiN / N-TiO2 has excellent activity of photocatalytic decomposition of water to produce hydrogen.

This invention relates to a photothermal polyacrylic acid hydrogel, its preparation method, and its applications, belonging to the field of environmental and energy functional materials. A method for preparing a photothermal polyacrylic acid hydrogel involves using biochar powder, N,N A photothermal polyacrylic acid hydrogel was prepared by free radical polymerization of methylenebisacrylamide, potassium persulfate, and acrylic acid in deionized water. The biochar powder was obtained by carbonization of sodium lignosulfonate. The hydrogel obtained by this invention has a uniform structure, with a uniform and firmly bonded distribution of sodium lignosulfonate biochar within. It exhibits excellent photothermal properties, a rapid photothermal heating rate, and good photothermal stability. Under simulated sunlight irradiation, it can achieve rapid surface heating and efficient seawater evaporation, showing broad application prospects in solar-driven seawater desalination and wastewater purification.

This invention relates to the field of photopolymerization materials technology, and more particularly to a low-migration, oxygen-resistant photoinitiator, its preparation method, and applications, applicable to environmentally friendly coatings, 3D printing resins, and biomedical adhesives. The nano-photoinitiator of this invention is prepared from a trivalent iron salt compound and an organic ligand containing a carboxylic acid group; it generates initiating free radicals under ultraviolet and / or visible light irradiation, which are used to initiate the free radical polymerization reaction of unsaturated monomers. The system of this invention can still achieve rapid and complete curing in an air environment, significantly reducing or avoiding the oxygen inhibition effect commonly found in traditional free radical photocuring, and exhibits high stability; simultaneously, it has advantages such as wide availability of raw materials, low cost, easy aqueous phase conversion, and reduced potential irritation and migration risks, thus improving the system's biocompatibility and environmental friendliness.

The invention relates to a carbon quantum dot sensitized TiO2 nanotube photo-anode material and a preparation method and application thereof.TiO2 is anodized and annealed to prepare a TiO2 nanotube array, then the TiO2 nanotube array is subjected to electrophoretic deposition in a carbon quantum dot solution to obtain the carbon quantum dot sensitized TiO2 nanotube photo-anode material, the preparation method is simple, and raw materials are wide in source; the photo-anode material prepared by the method has a one-dimensional ordered tubular structure, the reaction active area is larger, and the light energy utilization rate is improved; compared with a TiO2 nanotube photo-anode which is not sensitized by carbon quantum dots, the sensitized photo-anode shows higher light absorption capacity in an ultraviolet region and a visible light region, and the photo-electrochemical activity is excellent; tests prove that compared with a traditional photo-anode, the ammonia yield is improved by 151.5%, and the photo-anode has a wide application prospect.

This invention relates to the field of coating materials technology, specifically to a superhydrophobic photothermal anti-icing coating material based on biochar and its preparation method. The preparation method of the superhydrophobic photothermal anti-icing coating material includes: firstly modifying biochar with potassium hydroxide to obtain first modified biochar; secondly modifying the first modified biochar with hydrogen to obtain second modified biochar; mixing and dissolving the second modified biochar with a sulfur source and a molybdenum source, followed by heat treatment to obtain MoS2-loaded modified biochar; and mixing the MoS2-loaded modified biochar with a binder to obtain the superhydrophobic photothermal anti-icing coating material. This invention aims to solve the problems of high energy consumption and maintenance costs, long construction cycles, and short de-icing time associated with traditional de-icing methods for wind turbine blades.

The invention discloses a method for synthesizing methyl benzoate, monosubstituted methyl benzoate and dimethyl furan-2, 5-dicarboxylate through a photocatalytic oxidation esterification one-pot method. According to the method, cobalt phthalocyanine / B / P co-doped g-C3N4 Z-type heterojunction is taken as a visible light active photocatalyst, air is taken as a molecular oxygen source, a 300W xenon lamp is taken as a light source, and methyl benzoate, series monosubstituted methyl benzoate and 2, 5-dihydroxymethylfurfural are synthesized from benzyl alcohol or series monosubstituted benzyl alcohol or 5-hydroxymethylfurfural and methanol through a one-step photocatalytic oxidation esterification one-pot method under the conditions of room temperature and normal pressure. The invention discloses a novel green and low-carbon synthesis process of dimethyl furandicarboxylate. The synthesis method has the characteristics of atom economy of a synthesis route, cheap and wide sources of raw materials, direct use of air as an O2 source, high activity of a catalytic system, good selectivity, recyclability of the catalyst and the like.

The application discloses a preparation method of Mo-doped Bi2O3 and application of the Mo-doped Bi2O3 in photocatalytic nitrogen fixation, and is characterized in that: in the synthesis process of Bi2O3, molybdenum salt is added to obtain brownish yellow Mo-doped Bi2O3 through a solvothermal method. The preparation method is simple, raw materials are cheap and easy to obtain, the environment is less polluted, and the Mo-doped Bi2O3 is harmless to human bodies, has good photocatalytic nitrogen reduction performance, and has a good application prospect in the field of photocatalytic nitrogen fixation.