64results about How to "Improve light-to-heat conversion efficiency" patented technology

The invention provides a solar frequency division PV / T system coupled with a micro-nano film and a cavity type heat collector. The solar frequency division PV / T system comprises a linear Fresnel lens and the cavity type solar heat collector. A lighting window is formed in the heat collector in the axis direction, a micro-nano frequency division film is arranged on the inner wall face, right facing the lighting window, of a heat absorption cavity, and a concentrating photovoltaic cell is arranged below the micro-nano frequency division film. Sunlight is concentrated to the lighting window through the linear Fresnel lens at the top, is secondarily reflected by the lighting window to be collected to the cylindrical heat absorption cavity of the heat collector and irradiates the micro-nano film at the bottom, the micro-nano film transmits available wave bands in solar spectrum to the photovoltaic cell for power generation, light of other wave bands is reflected to the inner wall face of the heat absorption cavity, and the light of the other wave bands is reflected to the inner wall face of the heat absorption cavity. The heat is absorbed by the heat absorption coating, converted into heat energy and transmitted to the working medium layer, so that gradient utilization of the full spectrum of the sun is realized. The cavity type heat collector structure can effectively reduce energy dissipation caused by radiation and convective heat transfer, and the solar energy utilization efficiency of the system is improved.

The invention provides a phase-change composite aerogel material for photothermal conversion and high-density heat storage. The phase-change composite aerogel material takes MXene / CNTs modified aerogel as a three-dimensional porous continuous supporting framework and takes a phase-change material as a filling material; wherein the phase change composite aerogel material is prepared from the following components in percentage by mass: 3.0 to 4.4 percent of MXene / CNTs modified aerogel and 95.6 to 97.0 percent of a phase change material according to 100 percent of mass percent. The invention also provides a preparation method of the phase change composite aerogel material. The MXenes / CNTs modified aerogel composite phase change material prepared by the preparation method disclosed by the invention is in a micron level, MXenes and CNTs are attached to the surface and the interior of the MXenes / CNTs modified aerogel composite phase change material, and the MXenes / CNTs modified aerogel composite phase change material is large in heat transfer area, good in heat transfer performance and mechanical performance and wide in application range; the preparation method is simple, and the reaction time and reaction conditions are easy to control. The invention also provides application of the phase-change composite aerogel material in solar photothermal conversion and heat storage materials.

The invention belongs to the technical field of phase-change materials, and particularly relates to a long-term stable supercooling solar phase-change heat storage material capable of controlling electric trigger heat emission and a preparation method of the long-term stable supercooling solar phase-change heat storage material. The phase change heat storage material is composed of hydrogel serving as a framework material, hydrated salt fixed in a hydrogel framework through physical and chemical connection, a stably dispersed photo-thermal agent and an electrode embedded in the material. According to the invention, the spontaneous fluctuating effect of hydrated salt is obviously inhibited to reach a critical dimension and trigger crystallization, the long-term stable supercooled state of the material in a wide temperature range is realized, and by adjusting the proportion of the components, not only is the phase separation of the material effectively prevented, but also the photo-thermal conversion efficiency of the material can be obviously improved.

The invention discloses an MXene composite nanocellulose liquid crystal intelligent color-changing material as well as a preparation method and application thereof. The main components of the intelligent color-changing material comprise nanocellulose liquid crystal with a self-assembly structure and an MXene two-dimensional nanosheet. By compounding the MXene two-dimensional nanosheet with the nanocellulose liquid crystal phase, the MXene two-dimensional nanosheet can be used as a broadband absorbent and a black substrate to remarkably improve the color saturation of the nanocellulose liquid crystal; meanwhile, due to the two-dimensional nanosheet morphology, high photo-thermal conversion efficiency and high conductivity of MXene, the MXene composite nanocellulose liquid crystal intelligent color-changing material is flexible and adjustable in initial color, color-changing response speed, color-changing response sensitivity and color changing range. Based on the excellent characteristics of the nanocellulose liquid crystal and the MXene two-dimensional nanosheet, the MXene composite nanocellulose liquid crystal intelligent color-changing material has color change response to various stimulation factors such as environment temperature change, electric field change, magnetic field change, illumination and external applied stress.

The invention discloses a heavy anti-corrosion coating containing polyurethane microcapsules, a preparation method of the heavy anti-corrosion coating and a coating. A primer comprises a component A and a component B. The component A comprises epoxy resin; a solvent; bentonite; a microcapsule; the flaky basalt scales are coated with the polydopamine; zinc powder; steel slag shield powder; soybean lecithin; the component B comprises a solvent; a polyamide resin; the intermediate paint comprises a component A and a component B. The component A comprises a solvent; a hydroxy acrylic resin; an epoxy resin; bentonite; soybean lecithin; a microcapsule; the flaky basalt scales are coated with the polydopamine; micaceous iron powder; titanium dioxide; carbon black; the component B comprises a solvent; a polyamide resin; the finish paint comprises a component A and a component B. The component A comprises organic silicon modified acrylic resin; a silicone resin; hollow microspheres; the flaky basalt scales are coated with the polydopamine; titanium dioxide; soybean lecithin; fumed silica; a solvent; a catalyst; and the component B comprises a curing agent and microcapsules.

The invention belongs to the technical field of photo-thermal catalysis and biomass resource utilization, and particularly relates to a sulfonated biochar PC-SO3H-1 catalytic material as well as a preparation method and application thereof. The preparation method comprises the following steps: performing NaOH aqueous solution ultrasonic pretreatment, washing, drying and grinding on cellulose to obtain pretreated cellulose powder, uniformly dispersing the pretreated cellulose powder, p-toluenesulfonic acid and citric acid in deionized water, fully stirring at room temperature, then transferring the solution into a high-pressure reaction kettle, reacting, cooling, washing and drying to obtain the cellulose-p-toluenesulfonic acid / citric acid composite material. And grinding to obtain the PC-SO3H-1 photo-thermal catalytic material. The catalyst disclosed by the invention can be used for performing efficient photothermal conversion, so that the generation of biodiesel can be quickly catalyzed under the condition of room temperature.

The invention discloses an MXene quantum dot tip heterojunction material with high photothermal conversion efficiency. The MXene quantum dot tip heterojunction material comprises a substrate and a Co3O4 nanoneedle array structure grown on the substrate in situ, ti3C2MXene quantum dots are loaded on the surface of the Co3O4 nanoneedle, and the Ti3C2MXene quantum dots are fixed on the surface of the Co3O4 nanoneedle through the interaction force of heterogeneous charges. The invention also discloses a preparation method of the MXene quantum dot tip heterojunction material. The preparation method comprises the following steps: (1) preparing a Co3O4 nanoneedle structure arranged in an array on a substrate by using a hydrothermal method; and (2) under the irradiation of an ultraviolet lamp, putting the product in the step (1) into an MXene quantum dot solution, and soaking for 6-8 hours.

The invention discloses a preparation method of a plastic source flash graphene-based multifunctional anticorrosive coating, which comprises the following steps: mixing plastic powder and conductive carbon black to obtain mixed powder, and carrying out Joule thermal reaction on the mixed powder to obtain flash graphene; grinding the flash graphene, adding a polypyrrolidone solution, and carrying out ultrasonic dispersion, filtration and drying; adding the obtained dispersed flash graphene into an acetone solvent, ultrasonically dispersing uniformly, then adding epoxy resin, stirring until the epoxy resin is dissolved, and finally adding a curing agent to obtain the multifunctional anticorrosive coating. According to the preparation method, waste plastic can be effectively utilized, so that the multifunctional anti-corrosion coating with relatively good anti-corrosion performance and photo-thermal deicing effect is obtained.

The invention relates to a preparation method and application of a metal phthalocyanine compound with efficient photothermal conversion capacity. The preparation method comprises the following steps: (1) taking benzophenone, 4-hydroxybenzophenone and the like as initial raw materials, and reacting with 4-nitrophthalonitrile in one step or multiple steps to prepare a phthalocyanine precursor; (2) preparing a green metal copper phthalocyanine compound under solvothermal or solvent reflux with a copper salt (such as copper chloride, copper acetate and the like), and after the preparation is finished, washing the green metal copper phthalocyanine compound for multiple times by using ethanol, deionized water and ethanol; and (3) the green metal copper phthalocyanine compound has good high-heat photo-thermal conversion capacity under xenon lamps, sunlight and simulated sunlight, the preparation method is simple in process and easy for industrial production, and the obtained green metal copper phthalocyanine compound can be applied to photo-thermal materials, light therapy, solar seawater evaporators and the like.

The invention provides a nano composite material based on cuttlefish ink at copper oxide, which is characterized in that cuttlefish ink (M) is taken as a core, a layer of CuO is grown outside the cuttlefish ink (M), and an M-CuO composite multifunctional nano material is successfully constructed. The M-coated CuO composite material is spherical, the nano particle size is 128.2 nm, and the M-coated CuO composite material has good photothermal conversion performance (eta T = 47.6%) under the irradiation condition of near-infrared light (NIR). In addition, the M-coated CuO shows a good Fenton effect at room temperature, the Fenton reaction rate can be further improved through a photothermal effect, and the Fenton reaction rate at 45 DEG C under the same condition is more than two times that at 25 DEG C. In an in-vitro cell experiment, the M-coated CuO shows good biological safety, tumor cells can be efficiently killed under a photothermal-chemical kinetics combined treatment effect, and an effective strategy is provided for developing a multifunctional nano material with PTT-CDT combined treatment.

The invention discloses an NIR-II light-driven multifunctional nano enzyme for melanoma treatment and a preparation method thereof, and belongs to the technical field of nano biomedical material preparation, and the preparation method comprises the following steps: accurately weighing pure element substances platinum and selenium according to a ratio, then inserting into a quartz tube, heating to 700-800 DEG C, and reacting to obtain a compound; the compound is naturally cooled to the environment temperature, then the quartz tube is broken, and Pt-Se powder is obtained through collection; the method comprises the following steps: grinding Pt-Se powder into fine powder, then putting the fine powder into a chitosan solvent for ultrasonic treatment, centrifuging after ultrasonic treatment, removing supernate after centrifuging, removing redundant chitosan solvent, centrifuging again, and obtaining nano-enzyme from the supernate, namely PS-CS. The prepared nano-enzyme can effectively convert H2O2 into ROS under laser irradiation, so that the anti-tumor efficiency is improved, and a novel and comprehensive treatment strategy is provided for treatment of melanoma.

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 application discloses a kind of carbon confinement nickel-based schottky heterojunction nanoporous composite antifouling agent and preparation method thereof.The antifouling agent material mainly includes nickel-based schottky heterojunction, metal oxide and nitrogen-doped carbon confinement structure, by reasonably controlling metal component, oxide type, carbon shell thickness and porous structure, excellent photothermal, photodynamic and antibacterial properties are obtained.The material is synthesized by "precipitation-annealing coordination" method, which can effectively improve the stability of the antifouling agent in the tropical South China Sea marine environment, prolong the antifouling period, and show significant antibiofouling ability under seawater corrosion, high temperature, high salt and high ultraviolet conditions.The application has lower cost, good environmental friendliness, and can be widely used in marine facilities, ships and other marine equipment antifouling coating.

The present invention discloses a polythiophene-based photothermal fabric based on dextran sulfate as a template and a preparation method and application thereof, belonging to the technical field of functional textile processing. The preparation method of the present invention specifically comprises the following steps: (1) grafting dextran sulfate onto the fiber surface; (2) in-situ polymerization of polythiophene onto the fiber surface; (3) fabric washing and drying post-treatment; the present invention aims to form a template for inducing polymerization of thiophene monomers by grafting dextran sulfate onto the fiber surface; and then using an initiator to catalyze in-situ polymerization of 3,4-ethylenedioxythiophene monomers on the fiber surface to prepare polythiophene-based photothermal fabrics; after washing and drying, a fabric with a durable and stable photothermal effect is obtained. Compared with the traditional method of applying PEDOT:PSS to the fabric surface by an impregnation method or a coating method for preparing a photothermal fabric, the method of the present invention has the advantages of good photothermal uniformity, high efficiency, durable photothermal effect and strong photothermal bactericidal property.

The present invention relates to a high-entropy hydrotalcite-modified carbon fiber photothermal conversion material and a preparation method thereof. The technical scheme is: in a nitrogen or argon atmosphere, the waste fabric is heat-treated at a temperature of 300 to 700°C for 120 to 300 minutes to obtain a carbon fiber with a porous structure; then the metal salt is mixed in an equimolar ratio and stirred at 100 to 200°C for 10 to 25 minutes to obtain a mixed salt melt; then the carbon fiber with a porous structure is immersed in the mixed salt melt for 10 to 30 minutes, taken out, washed with water, and dried to obtain a high-entropy hydrotalcite-modified carbon fiber photothermal conversion material. The present invention has the characteristics of short production cycle, simple process, low cost, cheap and easy-to-obtain raw materials, and large-scale production. The prepared high-entropy hydrotalcite-modified carbon fiber photothermal conversion material has excellent photothermal conversion efficiency and high water evaporation rate.

The invention discloses a carbon nanotube gel, a gel electrolyte and a preparation method and application thereof. The carbon nanotube gel comprises a carbon nanotube, gel, an ionic liquid and water, wherein the mass ratio of the carbon nanotubes to the gel is 1: (1-13); the mass ratio of the carbon nanotubes to the ionic liquid is 1: (1-13); the mass ratio of the carbon nanotubes to the water is 1: (9-100). The carbon nanotube gel has good conductivity, flame retardance and photo-hydrothermal evaporation capacity, has excellent photo-thermal conversion efficiency and salt crystallization resistance, not only can efficiently absorb solar energy and convert the solar energy into heat energy so as to accelerate seawater evaporation, but also can keep the performance stability for a long time, and has good application prospects. And a green and efficient solution is provided for seawater desalination.

The invention provides a PN ligand capable of being subjected to cis-trans isomerization and a PN ligand modified Au cluster, and the PN ligand modified Au cluster with high photothermal conversion efficiency is prepared from the PN ligand capable of being subjected to cis-trans isomerization under illumination.

The invention provides a hemicyanine photosensitizer as well as a preparation method and application thereof, and belongs to the field of biological medicines. A hemicyanine dye-based molecule with a D-pi-A structure is developed through donor substitution engineering, and the structure of the hemicyanine dye-based molecule is shown as a formula I in the specification. The hemicyanine dye-based molecule has excellent spectral performance. The PLH1100 nano assembly further constructed on the basis of the hemicyanine dye-based molecule has excellent brain targeting property, tumor enrichment property, light stability and biocompatibility as well as excellent photothermal conversion efficiency and NIR-II tumor imaging capability, and is suitable for photothermal immunotherapy of glioblastoma. In addition, the invention also finds that the PLH1100 can significantly enhance the curative effect of a bispecific T cell adapter (Fn14 * CD3BiTE) aiming at an Fn14 target spot, the combination of the PLH1100 and the Fn14 * CD3BiTE adapter plays a synergistic role in photothermal immunotherapy, a new way is opened up for clinical treatment of glioblastoma, and the PLH1100 and the Fn14 * CD3BiTE have significant clinical application potential. # imgabs0 #

The invention discloses a method for preparing an outdoor copper foam composite high entropy ceramic photothermal fresh water evaporator, comprising the following steps: S1, adding cobalt nitrate hexahydrate, iron nitrate nonahydrate, nickel nitrate hexahydrate, chromium nitrate nonahydrate, manganese nitrate hexahydrate, and hexadecyltrimethylammonium bromide to deionized water, mixing evenly, then adding urea, and stirring to obtain a mixed solution; S2, subjecting the mixed solution to a hydrothermal reaction, centrifuging, washing, and drying to obtain a precursor powder; S3, subjecting the precursor powder to a heat treatment to obtain a high entropy ceramic; S4, adding high entropy ceramics and aluminum phosphate to deionized water, ultrasonically dispersing to obtain a suspension, placing copper foam in the suspension, and drying after immersion to obtain an outdoor copper foam composite high entropy ceramic photothermal fresh water evaporator. The invention has a simple preparation process and is easy to mass produce; the prepared photothermal fresh water evaporator has a high water evaporation efficiency.

The application discloses a kind of hydrophilic photo-thermal covalent organic framework nanofiber materials and preparation method thereof, belong to photo-thermal material and seawater desalination field.For the technical problem that existing photo-thermal material is difficult to consider high efficient light absorption and fast water transport, first, homogeneous polymerization method is used, monomer containing sulfonic acid group and porphyrin monomer etc. occur polycondensation reaction in acetic acid aqueous solution, and the photo-thermal covalent organic framework dispersion is obtained by dialysis purification;Subsequently, the dispersion is freeze-dried, and the hydrophilic photo-thermal covalent organic framework nanofiber is obtained.The material uses porphyrin big π bond system as photo-thermal conversion core, and uses the rich sulfonic acid group and regular pore channel in framework to build efficient water transport network.The preparation process of the application is mild and controllable, and the obtained material has excellent broadband light absorption and hydrophilic ability, and has broad application prospect in the field of solar-driven interfacial seawater desalination.

The invention relates to the technical field of biomedical materials, in particular to a gadolinium oxide-based nano preparation as well as a preparation method and application thereof. The preparation method of the preparation comprises the following steps: preparing gadolinium oxide nanoparticles through a hydrothermal method and amination modification, and dissolving the gadolinium oxide nanoparticles in deionized water to obtain a contrast agent solution; dropwise adding the nano-particles into a gold source solution under stirring at a certain temperature to obtain nano-particles with core-shell structures; and finally, slowly adding the synthesized dispersant solution of the water-soluble polymer into the core-shell nanoparticle solution to obtain a gadolinium oxide-based nano preparation solution. And performing post-treatment such as dialysis, freeze drying and the like to obtain the core-shell structure nanoparticles based on the gadolinium oxide nano preparation. The invention relates to a gadolinium oxide-based nano preparation for cancer diagnosis and treatment, gadolinium oxide is used as an MRI contrast agent, and a gold shell is grown on the periphery of the gadolinium oxide as a photo-thermal preparation; the hydrogel has the characteristics of good biocompatibility and the like, and has an important practical prospect in the field of preparation of diagnosis and treatment integrated medicines.

The invention discloses a Y0. 4Sr0. 6MnO3 perovskite porous loading material as well as a synthesis method and application thereof, and belongs to the field of cracking CO2 fuel synthesis catalyst materials. The invention aims to solve the problems of low stability, low CO yield and low CO2 conversion rate of a catalytic material in a solar thermochemical fuel preparation process (two-step CO2 catalytic cracking). The method comprises the following steps: mixing EDTA (Ethylene Diamine Tetraacetic Acid) with an ammonia water solution, adding deionized water, heating in a water bath, and magnetically stirring; adding Y (NO3) 3.6 H2O, Mn (NO3) 2.4 H2O and Sr (NO3) 2 powder, and then adding citric acid monohydrate; adding ammonia water to adjust the pH value, and keeping heating and stirring; drying, grinding, calcining, then grinding, mixing with deionized water, dropwise attaching turbid liquid to the SiC porous framework, and purging; and drying. According to the preparation method, the Y0. 4Sr0. 6MnO3 powder material is attached to the SiC porous framework, so that the gas-solid reaction contact area of the powder material and CO2 is increased, and the oxidation-reduction reaction rate is increased; the heating rate of the material is accelerated, and the photo-thermal conversion efficiency and the overall efficiency are improved.

This invention discloses a manganese dioxide nanozyme with photothermal and antibacterial functions and its preparation method, belonging to the field of biomedical materials technology. The invention first uses lactoferrin (LF) as a carrier template to synthesize manganese dioxide nanoparticles (LF-MnO2) with uniform particle size, high solubility, and high dispersibility via a one-step redox method. LF-MnO2 exhibits photothermal properties, achieving rapid heating and photothermal sterilization under near-infrared light irradiation. LF-MnO2 possesses various enzyme activities, including superoxide dismutase (SOD) and catalase (CAT), which can scavenge various oxygen free radicals. Furthermore, LF-MnO2 can efficiently catalyze the production of oxygen from hydrogen peroxide. The LF-MnO2 prepared by this invention has broad application prospects in photothermal antibacterial, antitumor, reactive oxygen species scavenging, and tissue regeneration and repair fields.

The invention relates to an underwater laser communication system and method, in particular to a bionic sunflower type underwater wireless laser communication system and a link establishment method, and solves the technical problems that the mechanical structure and the control strategy of the existing underwater wireless laser communication system are complex, the scanning link establishment efficiency is low, and the flexibility and the reliability are poor. The four-quadrant low-light detection unit and the light regeneration unit are used for converting and regenerating detected underwater weak light signals, the bionic sunflower structure unit is used for simulating a natural tracking mechanism of a sunflower to light, a traditional two-dimensional rotary table is replaced, the device has the advantages of automatic tracking and quick response, the requirement for an instrument logic structure is reduced, and the detection efficiency is improved. The system complexity and energy consumption are reduced, the flexibility and reliability of laser communication are improved, the problem that beams of an underwater wireless laser communication system are not easy to align is solved, the difficulty of re-alignment after an underwater wireless laser communication link is interfered is reduced, and the re-alignment time is shortened.

The invention discloses a full-biomass transparent liquid mulching film with photo-thermal conversion performance and a preparation method and application thereof, the liquid mulching film comprises the following components in parts by weight: 2-4 parts of lignin-containing nanocellulose, 1-2 parts of a biomass cross-linking agent, 25-30 parts of a biomass plasticizer and 65-70 parts of gelatin, the lignin-containing nanocellulose is nanocellulose with residual lignin obtained by performing lignocellulose refining treatment on corn straws. The liquid mulching film disclosed by the invention realizes full-biomass configuration, has excellent photo-thermal conversion performance, has extremely high application potential in high-altitude areas, and can effectively meet the photo-thermal conversion requirements under strong ultraviolet irradiation and low-temperature environments.

A preparation method of the porous titanium dioxide composite material comprises the following steps: 1) adding tetrabutyl titanate into glacial acetic acid while stirring until a solution is stirred to be white, so as to obtain a mixture; (2) transferring the mixture obtained in the step (1) into a drying oven, heating for a period of time, cooling at room temperature, centrifuging and drying to obtain porous titanium dioxide particles P-TiO2; and 3) dispersing the titanium dioxide particles P-TiO2 obtained in the step 2) in pure water, performing ultrasonic treatment until the titanium dioxide particles are uniformly dispersed, adding a certain amount of copper acetate solution, performing photodeposition under irradiation, and then performing centrifugation and drying to obtain the porous titanium dioxide composite material (Cu / P-TiO2) with the plasma resonance effect. The preparation method comprises the following steps: firstly, synthesizing titanium dioxide particles P-TiO2 with a porous structure by adopting a simple solvothermal method, then carrying out photodeposition treatment on the P-TiO2, loading metal Cu, successfully constructing a Schottky junction between the P-TiO2 and the metal Cu, obtaining the porous titanium dioxide composite material Cu / P-TiO2 with a plasma resonance effect, increasing exposure of active sites, and improving the photocatalytic activity of the porous titanium dioxide composite material Cu / P-TiO2. Compared with traditional titanium dioxide, the photocatalyst has a larger light absorption range, the catalytic activity and the photo-thermal conversion efficiency are effectively improved, and the hydrogen production performance is excellent.

The invention belongs to the technical field of photo-thermal electric conversion, and particularly relates to alkali lignin loaded copper sulfide nanoparticles, a photo-thermal electric device and a preparation method and application of the alkali lignin loaded copper sulfide nanoparticles and the photo-thermal electric device. According to the preparation method, alkali lignin nanoparticles and Cu < 2 + > in copper salt are firstly adsorbed and then react with S < 2-> to prepare alkali lignin-loaded copper sulfide nanoparticles, and then the alkali lignin-loaded copper sulfide nanoparticles and hydrogel with a thermoelectric function are assembled to obtain the photo-thermal electric device. Wherein the alkali lignin loaded copper sulfide nanoparticles as a photothermal conversion material have excellent photothermal conversion efficiency and long-term stability, and are the key point of improving the performance of photothermal electric devices; the hydrogel with the thermoelectric function keeps excellent thermoelectric performance and water retention performance, and the stability and durability of the hydrogel are enhanced; the photo-thermal electric device assembled by the alkali lignin and the copper sulfide nano-particles has excellent photo-thermal electric performance and long service life, and the huge potential and application prospect of the alkali lignin loaded copper sulfide nano-particles in the fields of photo-thermal electric devices and the like are fully proved.

The invention discloses a mesoporous hollow carbon drug loading system with cascade enzyme catalytic activity and preparation and application thereof, and belongs to the technical field of medicines. The drug loading system is composed of mesoporous hollow carbon, an anti-tumor drug, gold nano-enzyme and a hydrophilic functional polymer. The preparation method comprises the following steps: preparing gold nano-enzyme; the preparation method comprises the following steps: preparing MHC-COOH and MHC-SH; and preparing the drug-loaded nano enzyme. The drug loading system provided by the invention realizes efficient loading and stable dispersion of chemotherapeutic drugs. The gold nano-enzyme with the size consistent with that of the mesoporous channel of the carrier is used as a'gated 'switch and has multiple functions. The drug loading system has the effect of enhancing PTT; the premature release of chemotherapeutic drugs is prevented, the toxic and side effects on normal tissues are reduced, and the reduction / pH / NIR multi-responsive drug release behavior is realized; under the irradiation of near-infrared light, the drug release speed is further accelerated, the GSH consumption rate and the catalytic rates of the gold nano-enzyme and MHC are further improved, and a nano delivery system for enhancing chemotherapy through photo-thermal and cascade enzyme catalysis is achieved.

The application discloses a preparation method of a polyurea photo-thermal anti-icing coating and belongs to the technical field of photo-thermal anti-icing. The application is based on silica / polyurea composite particles and carbon materials, and super-hydrophobicity and relatively high photo-thermal conversion efficiency are obtained. The method is characterized in that silica nanoparticles are combined into polyurea molecules to form silica / polyurea composite particles; then the composite particles are combined with graphite microparticles and uniformly dispersed in polysiloxane, and a super-hydrophobic photo-thermal coating with excellent wear resistance and durability is developed. The coating surface has high photo-thermal conversion efficiency, can obviously increase temperature under the irradiation of sunlight, can delay the icing time and reduce the ice adhesion strength, and thus better anti-icing and de-icing effects are achieved.