17results about How to "Improve light absorption capacity" patented technology

The invention relates to three-dimensional modified polyvinyl alcohol hydrogel as well as a preparation method and application thereof, and relates to the technical field of evaporation materials, few layers of FLG and alpha type Bi2O3 are doped in polyvinyl alcohol hydrogel, and Ppy vapor deposition is performed on the surface of the hydrogel to obtain the three-dimensional modified polyvinyl alcohol hydrogel 3D-PVA coated Bi2O3-FLG / Ppy PEMs. After the material prepared by the method is finally optimized, the evaporation rate reaches 4.03 kg / (m < 2 >. H), meanwhile, the stable evaporation rate of 3.06 kg / (m < 2 >. H) is shown in an evaporation experiment for simulating northern sea water polluted by methylene blue dye, and the degradation effect on pollutants in evaporated water reaches 81% in an illumination experiment. The material prepared by the method not only has high evaporation rate in seawater desalination application, but also shows great potential and application prospect in treatment of seawater polluted by organic dye.

The invention discloses a preparation method of foam composite self-floating sponge and photo-thermal interface evaporation application of the foam composite self-floating sponge. In the foaming process of preparing the porous sponge, the step of adding hydrophobic foam particles in situ is introduced, and the composite material which can rapidly absorb and guide water and has the self-floating characteristic is prepared through a one-step method. The composite material disclosed by the invention can simultaneously meet the dual functions of water absorption, water diversion and self-floating. When the composite material is used as a substrate material of a photo-thermal interface evaporation system, a spontaneous, continuous and stable outdoor evaporation process can be ensured. Under the condition of simulating 1 solar radiation (1000 W / m < 2 >), the technology realizes the water evaporation rate up to 1.86 kg.m <-2 >. H <-1 >; and under natural sunlight irradiation (about 435 W / m < 2 >), the average sewage evaporation rate reaches 1.70 kg.m <-2 >. H <-1 >, and the daily average sewage evaporation capacity is 12.0-14.0 kg.m <-2 >.

The invention discloses a preparation method and an evaluation method of a high-stability ferric oxide / graphene nano composite material, and relates to the technical field of nano materials. The preparation method comprises the following steps: dissolving expanded graphite in DMF (Dimethyl Formamide), standing for one night, carrying out ultrasonic treatment on a mixture in an ice bath environment for 2.5-3 hours, and adding water to prepare a multi-layer graphene solution; respectively weighing FeCl3. 4H2O and anhydrous sodium acetate, adding the FeCl3. 4H2O and the anhydrous sodium acetate into the multilayer graphene solution, and violently stirring to obtain a reaction precursor solution; carrying out heat preservation on the reaction precursor solution in a water bath, cooling to room temperature, and carrying out high-speed centrifugal separation to obtain a wet sample; and washing the wet sample with absolute ethyl alcohol and purified water, and drying to obtain reddish brown powder. The Fe2O3 particles are loaded on the graphene, the two-dimensional lamellar structure, high thermal conductivity and high dispersity of the graphene can effectively prevent agglomeration of the nano particles, uniform distribution of the particles is guaranteed, the stability of the nano material in an aqueous solution is improved, the light absorption capacity of the nano material is improved, and the performance of the material in photothermal conversion is more stable.

The invention provides a molybdenum disulfide nano material rich in sulfur defects and a preparation method and application thereof, and belongs to the technical field of nano material preparation and sterilization. Starting from the properties of the molybdenum disulfide nano-material, sulfur defects with different concentrations are introduced to the surface of the nano-material through high-temperature calcination, and the molybdenum disulfide nano-material rich in sulfur defects is prepared; the molybdenum disulfide nano material rich in sulfur defects is in the shape of nano flower balls with the diameter of 200-300 nm, has the optimal photothermal conversion efficiency and high adsorbability under near-infrared light irradiation, and can efficiently inhibit the activity of escherichia coli and bacillus subtilis; the preparation method disclosed by the invention is simple in process, stable in reaction system, wide in reactant source and environment-friendly, shows a universal sterilization effect, is expected to introduce a new method in the field of sterilization of nano materials, provides a new technology and a new idea for design and preparation of functional nano materials, and has very good practicability.

According to the preparation method of the polypyrrole / hot-pressed melamine sponge aerogel provided by the invention, the polypyrrole is loaded on the hot-pressed melamine sponge in situ by utilizing a pyrrole polymerization reaction, the obtained aerogel can fully utilize the excellent optical performance of the polypyrrole and the porous structure of the hot-pressed melamine sponge, and the polypyrrole / hot-pressed melamine sponge aerogel is prepared. The preparation of the polypyrrole / hot-pressed melamine sponge aerogel which is high in mechanical property, super-hydrophilic, low in thermal conductivity and high in photo-thermal conversion efficiency is realized. The polypyrrole / hot-pressed melamine sponge aerogel prepared by the method provided by the invention can be applied to solar evaporation in saline water, actual seawater or heavy metal wastewater so as to obtain a clean water source.

The invention discloses a method for synthesizing a chromium ion-doped tungsten oxide complete photolysis water catalyst flat reactor, comprising the following steps: step 1: fully dissolving sodium tungstate and chromium acetate in water and then mixing with glacial acetic acid to obtain a reaction solution, wherein the volume ratio of water to glacial acetic acid is 1:1, wherein the concentrations of sodium tungstate, chromium acetate, citric acid or trisodium citrate are 0.01-1 mol L −1 , 1×10 −3 ~0.4 mol L −1 , 0~2 mol L −1 , and the molar ratio of sodium tungstate, chromium acetate, citric acid or trisodium citrate in the solution is maintained at 1:0.1~0.4:0~2, and then transferred to a stainless steel autoclave reactor with a polytetrafluoroethylene liner. The synthesis method of the present invention significantly improves the activity of the complete photocatalyst for water splitting (solar energy → hydrogen (STH) conversion efficiency value 4.3%~6.1%), service life, and reduces its cost price.

The present invention provides a method for synthesizing a nitrogen-doped tungsten trioxide complete photocatalyst for water splitting. Catalysts of different shapes are obtained within different ranges of the molar ratio of the tungsten precursor to hydroxylamine hydrochloride. The band structure of nitrogen-doped tungsten trioxide is regulated by adjusting the content of the N atom dopant, and the hierarchical structure morphology is controlled to increase the number of active sites and the diffusion and mass transfer capacity of water molecules. The synthesized four different types of nitrogen-doped tungsten trioxide complete photocatalysts for water splitting can effectively meet different requirements for the photocatalytic water splitting rate. Compared with the prior art, the method provided by the present invention significantly improves the solar energy to hydrogen (STH) conversion efficiency of the catalyst for complete photocatalytic water splitting, and the maximum conversion efficiency value can reach 3.8%, and reduces the cost of catalyst materials, which has practical significance for reducing the cost of green hydrogen production. The method provided by the present invention is suitable for large-scale preparation of complete photocatalytic water splitting catalysts.

The utility model provides an OLED (Organic Light Emitting Diode) display panel and a display device. The OLED display panel comprises a substrate; a first electrode in the substrate; the pixel definition layer and the pixel units are arranged on the first electrode, through holes are formed in the pixel definition layer, the through holes are filled with the pixel units, the pixel units are electrically connected with the first electrode, the pixel definition layer comprises a black material layer, and rough patterns are arranged on the outer surface of the black material layer; and the second electrode is arranged on the pixel definition layer and the pixel unit and is electrically connected with the pixel unit. When the OLED display panel is used, external light enters the surface of the black material layer from the second electrode, the rough patterns can enhance the back-and-forth reflection of the light on the surface of the black material layer, the light absorption effect of the light by the black material layer is enhanced, and therefore the reflectivity of the OLED display panel is reduced.

The invention discloses a natural high-modulus asphalt particle size detection method based on an image recognition technology, which comprises the following steps: heating natural high-modulus asphalt to be detected to a flowing state, and preparing a film sample on a glass slide; performing multi-view-field image acquisition on the film sample in a microscopic imaging system to obtain an asphalt particle image; identifying natural rock asphalt particles in the asphalt particle image, and counting particle size distribution parameters of the natural rock asphalt particles; and determining the storage stability of the natural high-modulus asphalt to be detected based on the particle size distribution parameters. According to the natural high-modulus asphalt particle size detection method disclosed by the invention, efficient detection and stable control on the particle size state and the storage stability of the natural high-modulus asphalt are realized.

The utility model relates to a photovoltaic module which comprises a bottom plate, two fixing plates are arranged at the two ends of the bottom plate, two supporting plates are arranged at the positions, located on the edges of the two sides of the bottom plate, of the two ends of one fixing plate, a placing plate is rotationally installed between the two supporting plates, and a mounting frame is arranged at the edge of one end of the placing plate. A rotating mechanism is arranged at one end of the mounting frame, a first motor is driven to enable a lead screw to rotate to drive a screw sleeve to move front and back, a spray pipe arranged on one side sprays water to the surface of the photovoltaic panel, a screw sleeve seat drives a movable block to slide along the interior of the mounting frame, and the photovoltaic panel is placed on the movable block. And the gear and the rack block are meshed and rotate, and the gear rotates to drive the brush to rotate through the shaft rod to clean the surface of the photovoltaic panel, so that the cleaning effect is improved, the light absorption effect of the photovoltaic panel is improved, and meanwhile, the labor loss is reduced.