31results about How to "High photothermal conversion rate" patented technology

The invention discloses a three-dimensional light-to-heat conversion material, device and method capable of efficiently treating salt water and waste water. The preparation method is as follows: adjusting the pH of the graphene oxide solution to 7-13 to obtain solution A; configuring a polymer electrolyte solution, Obtain solution B; with the concentration ratio of solution A:solution B being 3:1~3:12, solution B is added drop by drop in solution A, obtains charged graphene oxide composite solution; Clean and dry after pretreatment The melamine foam is immersed in the charged graphene oxide composite solution to fully absorb the charged graphene oxide composite solution; the saturated melamine foam is placed in an oven at 60-200°C for heat treatment for 6-24 hours, washed and dried to obtain Three-dimensional light-to-heat conversion materials. The material of the present invention has high light-to-heat conversion rate, good performance stability, good elasticity and easy cutting, can be recycled for many times, has simple preparation process, low synthesis cost, wide application range, and can be used for seawater desalination and compounding from low to high concentration Purification of polluted water, etc.

The invention provides a method for preparing selenium nanosheets, comprising the following steps: etching: providing a hydrofluoric acid solution with a mass fraction of 5% to 20%, adding aluminum selenide to the hydrofluoric acid solution to obtain hydrogen Hydrofluoric acid mixed system, transfer the hydrofluoric acid mixed system to 50-80°C and stir for 1-5 hours, after stirring, perform primary centrifugation on the hydrofluoric acid mixed system and collect the precipitate; Add it to the dispersant, and then ultrasonically treat the dispersant with a probe for 4-24 hours. The ultrasonic power of the probe is 200-400W, and the temperature of the dispersant during the ultrasonic process of the probe does not exceed 25°C; the selenium nanosheets are collected by centrifugation: The ultrasonicated dispersant is subjected to secondary centrifugation, the supernatant is collected to obtain a selenium nanosheet dispersion, and then the selenium nanosheet dispersion is subjected to tertiary centrifugation to collect precipitates to obtain selenium nanosheets. The preparation method of the selenium nano sheet of the invention has the advantages of low cost, high output and the like.

The invention discloses an inorganic-inorganic nano hybrid material of a bimodal mesoporous core-shell structure as well as a preparation method and an application of the inorganic-inorganic nano hybrid material. The bimodal mesoporous inorganic-inorganic nano hybrid material of the core-shell structure is prepared by the following steps: firstly, with the presence of a surfactant, reducing metal salt by virtue of ascorbic acid, so that mesoporous inorganic nanoparticles are obtained; then, covering the surface of hexadecyl trimethyl ammonium bromide, which serves as a surfactant, with a layer of mesoporous silicon dioxide; covalently grafting diethyltriamine pentaacetic acid after modifying a mesoporous silicon dioxide shell layer by virtue of amino; and finally, coordinating with metal ions, so that the bimodal mesoporous inorganic-inorganic nano hybrid material of the core-shell structure is obtained. The prepared material has the core-shell material, wherein a core is constituted by the mesoporous inorganic nanoparticles and a shell is formed by the mesoporous silicon dioxide shell layer, and the surface of the mesoporous silicon dioxide shell layer is hybridized and modified by virtue of inorganic metals. The inorganic-inorganic nano hybrid material has the advantages of being uniform in dimension, good in biocompatibility and the like, and the inorganic-inorganic nano hybrid material is high in optical stability, high in photo-thermal conversion rate and high in magnetic resonance imaging resolution ratio; and integration of magnetic resonance imaging and photo-thermal therapy can be achieved.

The invention provides a method for preparing a non-layered molybdenum nanosheet / graphene-based fiber film, comprising the following steps: preparing a pre-stripping dispersion of molybdenum powder, preparing a mixture of molybdenum powder and graphene oxide, and preparing a non-layered molybdenum Nanosheet / graphene oxide dispersion, spinning and post-processing. The preparation method of the non-layered molybdenum nanosheet / graphene-based fiber film of the present invention can not only assist molybdenum powder to be stripped into non-layered molybdenum nanosheets, but also help Non-layered molybdenum nanosheets mixed with graphene oxide. In the spinning process, non-layered molybdenum nanosheets, graphene and carbon black are further loaded on the fiber, which has the advantages of large specific surface area, strong infrared radiation, high thermal conductivity, good flexibility, and remarkable bending resistance. The invention also provides a non-layer molybdenum nanosheet / graphene-based fiber membrane.

The invention discloses a preparation method and application of water-dispersible carbon nano onion. According to the preparation method, candle ash is utilized as a raw material, and the candle ash which is not dispersed in water originally is changed into water-dispersible carbon nano-particles through ultrasonic treatment in strong-oxidation acid solution. The carbon nano onion has higher photo-thermal conversion efficiency, also has the advantages of good biocompatibility, good stability, simple preparation, low cost and the like, and can be applied to the field of photo-thermal treatment of tumors and the like. Meanwhile, as carboxyl is on the surface of the carbon nano onion, the carbon nano onion can be modified by molecules with amino; thus, a multifunctional photo-thermal reagent based on the carbon nano onion can be constructed.

The invention provides a method for preparing a non-layered molybdenum nanosheet / graphene-based fiber film, comprising the following steps: preparing a pre-stripping dispersion of molybdenum powder, preparing a mixture of molybdenum powder and graphene oxide, and preparing a non-layered molybdenum Nanosheet / graphene oxide dispersion, spinning and post-processing. The preparation method of the non-layered molybdenum nanosheet / graphene-based fiber film of the present invention can not only assist molybdenum powder to be stripped into non-layered molybdenum nanosheets, but also help Non-layered molybdenum nanosheets mixed with graphene oxide. In the spinning process, non-layered molybdenum nanosheets, graphene and carbon black are further loaded onto the fibers, which have the advantages of large specific surface area, strong infrared radiation, high thermal conductivity, good flexibility, and remarkable bending resistance. The invention also provides a non-layer molybdenum nanosheet / graphene-based fiber membrane.

The invention relates to a solar fixed-focus multi-dish heat collector thermal power generation system, which is composed of a heat collector, a heat storage device, a steam generator, a superheater, a turbogenerator set, an air cooler and a condensate tank. The hot oil pipe and the cold oil pipe are respectively connected to the heat accumulator through the hot oil main pipe and the cold oil main pipe, and a circulating oil pump is installed on the cold oil main pipe, and the heat accumulator and the steam generator are respectively connected by an oil return pipe and an oil delivery pipe , a hot oil pump is installed on the oil return pipe, the steam generator and the superheater are connected by a steam pipe, the superheater is connected to the turbogenerator through the superheater pipe, the turbogenerator is connected to the air cooler by the steam pipe, and the air cooler is connected through the condensing The water pipe is connected to the condensate tank, and the condensate tank is connected to the steam generator through the condensate pipe, and the condensate pump and iron remover are installed on the condensate pipe. The invention adopts a fixed focusing multi-dish heat collector to construct a light field, and has the advantages of strong wind resistance, high conversion rate of light to heat and electricity, and heat loss of heat pipes.

A preparation method and application of a polypyrrole photothermal film for intercepting volatile organic compounds in water body pollution. The invention belongs to the field of water resource purification materials. The purpose of the present invention is to solve the technical problem that existing photothermal materials cannot separate volatile organic compounds existing in the form of synthetic organic compounds in water, nor can they separate volatile organic compounds produced by microbial metabolism in natural water. The method of the present invention: 1. Spin-coat photoresist on the surface of a silicon wafer with a surface oxide layer; 2. Prepare a micron-scale grid array structure by photolithography; 3. Soak and elute in a silicon dioxide removal solution; 4. Place in KOH solution for processing; 5. Electrodeposit polypyrrole, and remove the template to obtain a polypyrrole film with a micron silicon cone structure on the surface. Or directly etch a silicon wafer without an oxide layer with a KOH solution, and then electrodeposit polypyrrole to obtain it. The photothermal material of the invention exhibits high photothermal conversion rate, good water purification effect and simple preparation process.