458results about How to "High photothermal conversion efficiency" patented technology

The invention discloses a solar water evaporation purification and decomposition device which comprises a water supply line, a float and heat insulation layer, an evaporation layer and a photothermalconversion and solute barrier layer which are connected in sequence from bottom to top. The water supply line enables water to pass through the float and heat insulation layer, and the water is pumpedinto the evaporation layer by virtue of a capillary action; solar energy absorbed by the photothermal conversion and solute barrier layer is converted into heat, and water is heated to be vaporized into water vapor from the evaporation layer; due to pore channel volatilization of the photothermal conversion and solute barrier layer, partial water vapor is decomposed to produce hydrogen and oxygen; since the photothermal conversion and solute barrier layer contains a hydrophobic part and is not infiltrated by water, the solar energy can directly heat a heat-absorbing material only, but not heat water, so that high photothermal conversion efficiency is realized; and meanwhile, the solute in the water is prevented from being separated out on the membrane, and sea water desalination, sewage purification and water decomposition can be realized. Due to the design of a hydrophilic / hydrophobic double-layer evaporation structure, the solar water evaporation purification and decomposition device with high photothermal conversion efficiency and high stability is obtained.

The invention provides a cellulose / two-dimensional layered material composite hydrogel. The composite hydrogel comprises a cellulose three-dimensional network structure and a two-dimensional materialsupported in the cellulose three-dimensional network structure, wherein the two-dimensional layered material is a two-dimensional transition metal carbide, nitride, or carbonitride. According to the composite hydrogel provided by the invention, the two-dimensional layered material can be stably supported in the composite hydrogel system and is not easy to agglomerate; and the composite hydrogel has good compatibility with a biological fluid, and the advantages of full biodegradability and high biological safety, and can be used in the field of biomedicines. The invention also provides a preparation method of the composite hydrogel.

The invention discloses a tower type solar thermal power generation system for a heat absorber of vacuum heat absorption pipes, which is characterized in that water / steam is taken a heat transfer fluid, and fusion salt is taken as a heat storage medium. The tower type solar thermal power generation system comprises a heliostat (1), a support tower (2), a heat absorber (3), a steam turbine (4), a generator (5), a deaerator (6), a condenser (7), a water feed pump (8), a high-temperature fusion salt storage tank (9), a low-temperature fusion salt storage tank (10), a water / steam-fusion salt heat exchanger (11), a fusion salt steam generator (12) and a control valve (13). The heat absorber (3) is formed by connecting the vacuum heat absorption pipes (18) in series and in parallel. According to the invention, the heliostat is arranged in a fan-shaped manner, a rectangular manner or a circumferential manner, the high-temperature and high-pressure overheating steam is obtained, and the solar thermal power generation system is suitable for a large installed capacity tower type solar thermal power generation station.

The invention relates to a slotted solar intermediate / low-temperature ORC (organic rankine cycle) thermal power generator, consisting of a parabolic trough light-condensing array, a linear focusing strengthening heat collecting tube, a heat-conduction working medium, a heat exchanger, an atomizer, an atomization flash evaporation tank, a pressure pump, a pressure control valve, a heat storage device, a heat-storage working medium, an intermediate / low-temperature ORC power unit, an organic evaporating agent tank, an evaporator, a condenser, an air cooling machine set, a regulating valve, a transmission pipeline, a complementary boiler, a light-condensing array cluster PLC (programmable logic controller), and a hydraulic or turbine worm driver. According to the slotted solar intermediate / low-temperature ORC thermal power generator disclosed by the invention, the heat storage device supplies heat to an intermediate / low-temperature ORC power machine by taking atomized water vapor, glycol, heat-conducting oil or fused salt as a heat-transfer working medium so that the intermediate / low-temperature ORC power machine is directly driven to realize solar heat collection power generation. The slotted solar intermediate / low-temperature ORC thermal power generator disclosed by the invention belongs to the field of solar energy heat utilization.

A TiOxNy highly effective solar energy light-heat conversion film preparation method comprises the following steps: (1) cleaning ailming substrate (2) opening vacuum coating chamber, placing ailming substrate on sample pivoted frame (3) baking vacuum coating chamber and turning on corresponding pump cooling water system, vacuum-pumping to background vacuum (4)letting Ar into vacuum coating chamber through mass flowmeter, adjusting air pressure for sputtering (5)starting direct current target power, ionizing Ar, adjusting power sputtering current, presputtering to remove target surface compound of Ti metallic target (6) introducing nitrogen and oxygen through mass flowmeter for reactive sputtering, segmental or continuous adjusting filming parameter, depositing in turn absorption layer and chemical compound reduced reflecting layer of different metal content, (7)stopping the machine and picking out film sample. The inventive process is environment friendly. Said film has property of high light-heat conversion efficiency and long life, can be broadly applied to heat collecting surface of solar energy light-heat conversion field.

The invention discloses a solar water purifier based on interface solar photo-thermal conversion, which comprises a solar interface evaporator and a distilled water collector, the solar interface evaporator comprises an open water storage tray and a light absorber with high photo-thermal conversion efficiency, the light absorber is of a double-layer structure and is formed by compounding an upper-layer photo-thermal conversion material and a lower-layer thermal insulation material, and a dust-free cloth is arranged between the upper-layer material and the lower-layer material. During use, it needs to be guaranteed that the dust-free cloth can continuously make contact with the liquid level in a water storage disc, so that it is guaranteed that enough water is conveyed to the surface of thelight absorber to guarantee continuous evaporation. Only solar energy is used as driving energy, other energy sources are not consumed, meanwhile, the problem of replacement of a filter element of aconventional water purifier is avoided, and the device has the advantages of being portable, low in price, high in water purification efficiency and the like and can be stably applied to seawater desalination, sewage treatment and outdoor drinking water purification for a long time.

The invention provides a phase change energy storing material having photo-thermal conversion performance and a preparation method of same. The phase change energy storing material includes two types,one is a phase change energy storing material (I) of which the inner core and / or the shell contains a photo-thermal conversion material, and the other is a composite shaped phase change energy storing material (II) which contains the photo-thermal conversion material. The phase change energy storing material has excellent photo-thermal conversion performance, can convert solar energy into thermalenergy and stores the thermal energy, and can be applied to the fields such as solar energy utilization, industrial waste heat recovery, energy saving of buildings, heating and air conditioning systems, aerospace, textile fibers, etc.

The present invention provides are a gold nanoflower structure and a preparation method therefor. The gold nanoflower structure is a gold nanoflower particle, with round-head columns being uniformly distributed at the periphery thereof, obtained by using gold octahedrons, gold balls or gold tetrahedrons as seed crystals and reducing chloroauric acid by using weak reductant in an environment of high-concentration polyvinylpyrrolidone. In addition, also provided in the present invention are a gold nanoflower / quantum dot composite probe for living cell immunofluorescent labeling and photothermal therapy, a preparation method therefor and a use thereof. In comparison with traditional probes, the probe, incorporates the features of photothermal therapy and fluorescent labeling, and is capable of killing cancer cells in an effective and directional way. Two light sources are adopted to bring a tremendous photothermal conversion efficiency and a greater enhancement on fluorescence intensity of quantum dots respectively, thus mutual interference of two effects are avoided tactfully. The coating of silicon dioxide averts the biotoxicity of the gold nanoflower and the quantum dot effectually, enabling the surface of the composite probe to be easily functionalized and also imparting an extraordinarily excellent biocompatibility to the composite probe.

A photothermal conversion material showing high sensitivity to the light of a semiconductor laser having an emission frequency band of 750 nm DIFFERENCE 900 nm with a high photothermal conversion efficiency and a planographic original plate fabricated by using the transducer are provided. This photothermal conversion material comprises a phthalocyanine compound of the following general formula (I) wherein R1 DIFFERENCE R8 each represents alkyl or alkoxyalkyl; X1 DIFFERENCE X8 each represents sulfur or NR9, where R9 is hydrogen or alkyl.

The invention provides near infrared absorbing materials showing high light-to-heat conversion efficiency and high sensitivity to lasers whose emission bands are within the range of 750 nm to 900 nm, original plates for direct printing plate making, and novel compounds which can be applied to such absorbing materials and plates. The compounds are polymethine compounds of the general formula (I) A detailed description of general formula (I) may be found in the specification.wherein R1 represents an alkoxy group which may be substituted; R2 represents an alkyl group which may be substituted; R3 and R4 each represents a lower alkyl group or R3 and R4 taken together represent a ring; X represents a hydrogen atom, a halogen atom or a substituted amino group; Y represents an alkoxy group which may be substituted or an alkyl group which may be substituted; Z represents a charge neutralizing ion.

The invention relates to a multi-functional composite membrane. The multi-functional composite membrane comprises the following components in parts by weight: 0.1-15 parts of conjugated polymer nano material and 85-99.9 parts of plastic, wherein the conjugated polymer nano material is selected from at least one of the following materials: poly(3,4-ethylenedioxythiophene), polythiophene, polypyrrole, polyaniline, poly(p-phenyl vinyl) and poly(dopamine melanin). The multi-functional composite membrane has high photo-thermal conversion efficiency and can be used for converting near infrared ray and infrared ray in sunlight into heat, and temperature at the periphery of the membrane and in coverage area of the membrane can be increased; meanwhile, bacteria, mould and the like are killed by heat produced by the multi-functional composite membrane; and the multi-functional composite membrane is obtained by mixing and stirring non heavy metal type and non-toxic conjugated polymer nano material with plastic and then forming a thin film by adopting an extrusion method, a calendaring method or a blowing moulding method and can be widely applied to membranes for everyday devices, membranes for packaging, agricultural films and industrial films.

The invention provides a prussian blue nano particle with high photo-thermal performance and of a manganese-doped hollow structure and a preparation method of the prussian blue nano particle, belongs to the field of nanometer material preparation and biomedicine and aims to solve the problems that existing the photo-thermal performance and biosecurity of an existing manganese-doped prussian blue nano particle are in need of improvement, the synthesis process is complex, and the cost is high. The preparation method includes the steps that surface protectant and potassium ferricyanide are added to an acid solution, manganese salt is added, and a heating reaction is conducted; 2, vacuum drying is conducted after washing is conducted; 3, the acid solution, the surface protectant and a manganese-doped solid prussian blue nano cubic sample are mixed, and the heating reaction is conducted after dispersing is conducted; washing is conducted, a blue porous Mn-HPB nano cubic material is obtained, and vacuum drying is completed. The prussian blue nano particle with high photo-thermal performance and of the manganese-doped hollow structure is simple in preparation process and high in controllability, the obtained nano material is uniform in particle diameter and good in dispersing property, and long-term and stable existence is achieved; excellent biosecurity is achieved; a higher photo-thermal effect and photo-thermal conversion efficiency are achieved, and the prussian blue nano particle and the preparation method are used for photo-thermal treatment of tumors.

The invention provides a cellulose / black phosphorus nanosheet composite hydrogel. The composite hydrogel comprises a cellulose three-dimensional network structure and black phosphorus nanosheets loaded in the cellulose three-dimensional network structure. The black phosphorus nanosheets can be stably loaded in the composite hydrogel system, and are not prone to agglomerate, and the composite hydrogel has the advantages of uniform, stable and high photothermal conversion efficiency, good compatibility with biological fluids, complete biodegradability and high biosafety, and can be used in biomedical field. The invention also provides a preparation method of the composite hydrogel.

The invention relates to a preparation method of a gold / nitrogen-doped hollow carbon nanosphere core-shell material, belonging to the field of biomedical materials. The preparation method comprises the steps of firstly, preparing gold sol by using a sol-gel method; secondly, coating the surfaces of gold particles with SiO2 by using an improved stober method, and then forming Au@SiO2@PDA spheres in a weak alkaline water-containing environment by means of auto polymerization of dopamine; finally, carrying out high-temperature calcination, and obtaining the gold / nitrogen-doped hollow carbon nanosphere core-shell material after NaOH is etched. The method is simple, mild and environment-friendly, and does not add additional toxicity; the prepared gold / nitrogen-doped hollow carbon nanosphere core-shell material has the particle size of about 165-175nm; as a near-infrared photothermal therapeutic agent for treating tumors, a product not only has good biocompatibility and light and heat stability, but also has the characteristic of having an internal hollow structure; after the gold / nitrogen-doped hollow carbon nanosphere core-shell material is used, the speed of particle exchange is accelerated, and the photothermal conversion efficiency is improved.

The invention discloses a selective absorbing film set of a radiation absorbing layer based on mixture. The mixture is mixed by a superabsorbent material and a transparent material. The absorbing film comprises a metal substrate, and a selective absorbing film of the radiation absorbing layer based on the mixture, an antireflection dielectric film and a protective film which are deposited sequentially on the substrate. According to the selective absorbing film set, performances of the absorbing film can be controlled flexibly by adjusting the parameters of materials of the film set, the thickness of the coating, ingredients of the mixed film, the size, the shape and the like. The premise of maintaining high absorption and low emissivity can be met, and meanwhile, requirements of diversification and individuation of solar thermal products of solar water heaters and solar air conditioners can be met. The selective absorbing film set has the advantages that structure is simple, and the selective absorbing film set is adaptable to various processing and producing and has an important significance to development of the field of solar selective thermal absorbing films.

The invention discloses a photothermal composite material, and a preparation method and an application thereof. The method comprises the following steps: premixing tetrabutyl titanate with an alcoholsolvent according to a predetermined ratio to prepare a mixed solution; soaking sponge in the mixed solution, and heating the soaked sponge by using hot steam to obtain a photothermal composite precursor; and placing and carbonizing the photothermal composite precursor in an argon-protected tubular furnace to prepare the photothermal composite material. The preparation method of the photothermal composite material has the advantages of low cost, simple technology and realization of large-scale production, and the obtained photothermal composite material has a high light absorption capacity, ahigh water transportation capacity and a high photothermal conversion efficiency, and can be applied to photothermal seawater desalination treatment in order to effectively improve the seawater desalination efficiency.

The invention provides an ultrathin nanosheet semiconductor material and a preparation method and application thereof. The preparation method comprises the following steps: heating a first organic solvent with high boiling point to obtain a first solution; heating to dissolve a precursor source AnBm of an A and a precursor source RjVk of an R in a second organic solvent with high boiling point to obtain a second solution; and mixing the first solution and the second solution, and heating with stirring to obtain the ultrathin nanosheet semiconductor material. The invention has the advantages of simple preparation process, good repeatability and strong controllability; the prepared nanometer material has thickness of 1-50 nm and an ultrathin nanosheet structure; and the ultrathin nanosheet semiconductor material prepared by the invention has photothermal conversion effect, and can be used as a novel photothermal conversion material in a solar cell or a solar energy collection device.

The invention discloses a branched gold-platinum dual-metal nanoparticle as well as a preparation method and application thereof. The gold-platinum dual-metal nanoparticle has photo-thermal / radio-sensitization combined treatment performance and structurally contains gold-platinum nanoparticles and polyethylene glycol, wherein the gold-platinum nanoparticles are used for photo-thermal / radio-sensitization combined treatment, and polyethylene glycol is used for the surface modification of a thioctic acid terminal of a hydrophilic polymer. The gold-platinum dual-metal nanoparticle can be applied to the photo-thermal / radio-sensitization combined treatment and has the advantages of simplicity in preparation, low cost and remarkable treatment effect.

The invention relates to copper selenide / mesoporous silica core-shell nanoparticles and a preparation method and application thereof. The copper selenide / mesoporous silica core-shell nanoparticles are Cu2<-x>Se / mSiO2-PEG core-shell nanoparticles, where x is 0-1, and m is mesoporous. The preparation method comprises the following steps: preparing a Cu2<-x>Se nanocrystalline, transferring the hydrophobic Cu2<-x>Se nanocrystalline into an aqueous phase through CTAB (Cetyltrimethyl Ammonium Bromide), and growing a mesoporous silica layer on the surface of the CTAB through a sol-gel method by taking the CTAB as a template; and finally, modifying and coupling polyethylene glycol to the surface, and obtaining the copper selenide / mesoporous silica core-shell nanoparticles. The invention also discloses application in preparation of diagnosis and treatment preparations. The obtained Cu2<-x>Se / mSiO2-PEG has extremely low cytotoxicity, so that cancer cells can be effectively killed through light and heat, and the anti-cancer drug DOX can be effectively transmitted into the cells and has pH and laser-sensitive drug sustained release performance, so that a synergistic effect between photothermal therapy and chemotherapy can be realized.

The invention discloses a MoO<3-x> / g-C<3>N<4> composite photocatalytic material. The composite photocatalytic material is composed of a hydrophobically modified cellulose acetate membrane and a MoO<3-x> / g-C<3>N<4> compound supported on the cellulose acetate membrane, wherein the MoO<3-x> / g-C<3>N<4> compound is formed by connecting MoO<3-x> with g-C<3>N<4> via a Z-type heterojunction. The inventionalso discloses a preparation method for the above MoO<3-x> / g-C<3>N<4> composite photocatalytic material and the application of the composite photocatalytic material to degrading of VOCs in water bodies. The MoO<3-x> / g-C<3>N<4> composite photocatalytic material of the invention has high photothermal conversion efficiency and high quantum efficiency, and can improve the vaporization speed of waterand realize high-efficiency degradation of VOCs; and high-quality and high-efficiency production of clean water is successfully achieved through the synergistic effect of vaporization and degradation.

The invention discloses a photothermal conversion composition and a preparation method thereof. The coating composition is composed of the following raw materials, by weight, 50 parts of acrylic resin, 25-35 parts of dimethylbenzene, 1-4 parts of photothermal nanometer material, 3-5 parts of dispersing agent, 0.5-1 part of antifoaming agent, 0.5-1 part of flatting agent and 1-3 parts of adhesion promoter. The photothermal nanometer material is CuS semiconductor nanometer particles or a mixture of CuS semiconductor nanometer particles and an infrared absorption material, wherein the infrared absorption material is one of zirconium carbide, silicon carbide and nanometer gamma alumina, or a mixture of the zirconium carbide, the silicon carbide and the nanometer gamma alumina. The CuS semiconductor particles with super-nano microstructures are utilized to prepare the photothermal conversion material organic coating composition. The coating composition is used as a coating, has the advantages of being high in photothermal conversion efficiency, good in heat storage and preservation, wide in raw material resource, easy to prepare, environment-friendly, capable of being applied to the field of solar photothermal conversion and the like.

The invention belongs to the technical field of nanometer material preparation technology and special materials, and particularly relates to preparation of a mesoporous silica nanocomposite with the photo-thermal function and photo-thermal performance research thereof. According to the mesoporous silica nanocomposite, cetyl trimethyl ammonium chloride is adopted as a template, tetraethoxy-silicane is adopted as a silicon source, trithione propyl trimethoxy silane is adopted as a sulfydryl modifier, and the mixture is stirred under the temperature of 60 DEG C to perform a reaction to form meso-porous silicon balls; then, the obtained sample is dispersed into water, a copper ion saline solution is added into the alkaline condition, stirring continues to be performed, then, cupric ions are adsorbed, then, sodium sulfide or sodium thiosulfate water solution is added on the acid condition, and stirring is performed to obtain the mesoporous silica nanocomposite modified by copper sulfide. The meso-porous silicon balls with the photo-thermal treatment function have the advantages of being small in particle size, high in specific surface, large in capacity, good in biocompatibility and the like, and the preparation method has the technical advantages of being simple in technology, low in cost, high in photo-thermal conversion efficiency, wide in application range and the like.

A linear Fresnel reflection type mid-and-low temperature solar energy thermochemical utilization device comprises a linear Fresnel reflection condensing mirror array driven by a solar tracking device to real timely track the sun, and a thermal absorber matched with the condensing mirror array and independently arranged, wherein the thermal absorber is tubular, a selective absorption coating is coated on the surface of the outer wall, and a chemical reactant medium and a catalyst are filled in the tube; a solar energy light-focusing system formed by the Fresnel reflection condensing mirror array and the solar tracking device is adopted and is well matched with the hot grade of thermal chemical reaction of mid-and-low temperature fossil fuel, the structure is simple, the manufacturing and running cost is low and the wing resistance is good when the solar energy thermochemical utilization device is mounted close to the ground; with the chemical reactant medium and the catalyst in the thermal absorber, the solar energy thermochemical utilization device can serve as the thermochemical reaction place while absorbing the solar energy, so that the heat can be directly absorbed and utilized, and the system integration complexity and energy transfer loss can be effectively reduced; as the thermal absorber is independently arranged, the safety and the stability are higher during the heat absorption and reaction process.

A negative planographic printing plate precursor for heat-mode exposure systems, which has, on a support, a photosensitive layer containing: (A) a light-to-heat conversion agent; (B) a polymerizable unsaturated group-having compound; and (C) an onium salt having a counter anion with a valency of at least 2. The precursor is capable of being exposed with an IR laser for image formation thereon. The onium salt may be, for example, a diazonium salt, iodonium salt or sulfonium salt. The counter anion has at least two anionic sites which may be the same or different, and the anionic structure is preferably divalent to hexavalent.

The invention relates to a heat pipe photovoltaic hot water composite system combined with a thermoelectric plate. The system comprises a whole-plate photovoltaic hot water module, a semiconductor double-layer heat exchange header, a photovoltaic and electric power control system and a water tank. The double-layer heat exchange header comprises two layers, i.e., a direct heat exchange layer and asemiconductor heating layer. On a clear day, circulating water flows through the direct heat exchange layer and the semiconductor heating layer, hot water is produced, the temperature of a photovoltaic cell is reduced and the photoelectric conversion efficiency is increased. On a somber day, the circulating water only flows through the semiconductor heating layer; the thermoelectric plate works; the water temperature is obviously raised by the heat pump effect of the thermoelectric plate; compared with the output of the hot water of a common PV (photovoltaic) / T (temperature) system, the output of the hot water is greatly increased; the temperature of the photovoltaic cell is lower and the photoelectric conversion efficiency is higher. The invention has the characteristic that the heat pipe photovoltaic hot water composite system can be miniaturized. The relationship between electric power and the output of the hot water can be regulated according to the weather and the requirement. The utilizing efficiency and the quality of solar energy are improved. Meanwhile, the dependence on an external power supply is reduced and the application range of the system is enlarged.

The invention discloses a paper based composite light absorption material for efficient photothermal conversion and a preparation method thereof. Carbon black particles in commercial carbon black inkare deposited on a filter paper surface by ultrasonic loading, the preparation method is simple, low in cost, and green and environment-friendly, and a composite light absorption material characterized by broad spectral response range, high photothermal conversion efficiency and strong hydrophilcity can be obtained, is easy for mass production and wide application, enriches the existing photothermal material field, and fills the blank of the technical field. At the same time, by utilizing the efficient photothermal conversion characteristic, the paper based composite light absorption materialprovided by the invention can be applied to seawater desalination, can meet the social requirement for rapid acquisition of purified water, and also provides a new way for photothermal utilization ofsolar energy.

The invention discloses a Ti-alloy nitride selective-absorption film system. The selective-absorption film system comprises a metal substrate and further comprises a Ti-alloy nitride selective-absorption film, an anti-reflection dielectric film and an SiO2 protective film which are deposited on the metal substrate in sequence. The selective-absorption film system provided by the invention is characterized in that the solar absorptivity is greater than 97%; the solar emissivity is smaller than 3%; both the photo-thermal conversion efficiency and the heat-collecting efficiency are high. Under the premise of keeping high absorptivity and low emissivity, the selective-absorption film can meet the requirements of diversification and individuation of photo-thermal products such as solar water heaters and solar air conditioners by adjusting the components of Ti alloy. The selective-absorption film system is simple in structure and free from oxygen deposition, and has the characteristics of simple preparation technology and using less target materials, so that the production efficiency is greatly improved; the industrial large-scale production cost is lowered. Therefore, the selective-absorption film system is of great significance for the development of the field of solar selective heat absorption films.

The invention discloses a preparation method of a bismuth quantum dot material growing in mesoporous silica nanoparticles, and belongs to the field of nano material preparation research. According tothe method, mesoporous silica is prepared by using an organic template, and bismuth quantum dots are reduced and grown in situ, so that the particle size of the prepared mesoporous silica is about 150nm, the pore diameter is about 10 nm, and the particle size of the bismuth quantum dots is about 1-2 nm. Mesoporous silica prepared has excellent adsorption performance, has a good protection effecton bismuth, improves the photo-thermal conversion efficiency of bismuth, and has a wide application prospect in the fields of electronic devices, sensors, drug carriers and the like. The bismuth quantum dots (Bi@SiO2) grown in the mesoporous silica nanoparticles have excellent photothermal conversion performance and huge potential in the field of tumor photothermal therapy. The preparation methodprovided by the invention is simple in equipment and has the advantages of easiness in control of process conditions, low cost and the like.