17results about How to "Excellent photothermal conversion performance" patented technology

The invention discloses preparation of a monatomic graphene type photo-thermal catalyst and application of the monatomic graphene type photo-thermal catalyst in catalyzing aldose to produce ketose, and the preparation comprises the following steps: loading a monatomic precursor (X) on a graphene type carbon material (GT) by adopting a solution impregnation method, further reducing the monatomic precursor into a corresponding monatomic (Y) by adopting a continuous oxidation-reduction method, the monatomic graphene type photo-thermal catalyst is obtained, and the monatomic graphene type photo-thermal catalyst is expressed as Ysg / GT. The catalyst is used for catalyzing other different aldoses (maltose, glyceraldehyde, erythritol and xylose) to produce corresponding ketose, the catalyst shows good catalytic activity and photo-thermal performance, and the ketose yield is larger than 50%. Finally, in the reusability research of the catalyst, the catalyst is found to have good activity and structural stability, the chemical equilibrium limit of the reversible reaction is broken through, the reaction rate is increased, and the catalyst can help to develop an efficient and green catalyst to open up a new way for the reversible reaction process.

The invention relates to the technical field of phase change materials, and discloses a multifunctional composite phase change material and a preparation method and application thereof. The phase change energy storage microcapsule is prepared from the following raw materials: a core material, a Pickering emulsion template and a wall material, the wall material comprises resin and polypyrrole. The multifunctional composite phase change material is prepared from the phase change energy storage microcapsule, a reinforcing material and a polymer elastomer. The phase change energy storage microcapsule provided by the invention is uniform in size, regular in shape, good in stability and good in coating effect, the surface is doubly coated with the resin and the polypyrrole nanoparticles, the phase change material leakage condition is avoided, and the thermal cycling stability is good; the multifunctional composite phase change material has good photo-thermal conversion capability and conductivity and good thermal cycling stability, can meet the multi-scene application requirements in the fields of intelligent wearing, solar energy conversion and human body near-infrared photo-thermal treatment, and is non-powdery and can be directly used.

The invention relates to the technical field of seawater desalination, in particular to a collagenous fiber-based interface photo-thermal evaporator for purifying oil-containing seawater and a preparation method of the collagenous fiber-based interface photo-thermal evaporator. According to the collagenous fiber-based interface photo-thermal evaporator, a porous base material constructed by bonding hydroxypropyl methyl cellulose with collagenous fibers is used as a carrier, and a plant polyphenol-ferric ion coordination system is used as a modified load. Collagen fibers with a multi-layer structure are adopted as raw materials, and the collagenous fiber-based interface photo-thermal evaporator with good mechanical performance is prepared through a green and non-toxic process. The obtained collagenous fiber-based interface photo-thermal evaporator shows super wettability to a water phase and an oil phase, has underwater super-oleophobicity, shows excellent oil-in-water emulsion separation performance, and solves the technical problem that in the prior art, when a solar-driven interface photo-thermal evaporator is used for treating oil-containing seawater, the performance effect is poor. The integrated purification of the oil-containing seawater is realized.

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 discloses a photo-thermal nano material capable of resisting bacteria and promoting osteogenesis through immune activation and a preparation method and application of a composite scaffold of the photo-thermal nano material, and belongs to the technical field of bone implant material preparation. The photo-thermal nano material XCuSi4O10 obtained through synthesis has two-region near-infrared light driving responsiveness, can convert external near-infrared light energy into heat energy, degrades gradually released copper ions, and can achieve a synergistic effect with photo-thermal to achieve removal of bacteria on infected parts. According to the invention, the synthesized photo-thermal nano material is doped into a bone repair material, and a personalized composite scaffold with antibacterial and osteogenesis promoting functions is prepared by using a 3D printing technology. Through thermal stimulation under mild conditions and synergistic enhancement of adjustment of an autoimmune system with Cu ions, safe and effective antibiosis is achieved, and the technical problems that in the prior art, the antibiosis efficiency is low, normal tissue can be damaged due to too high stimulation temperature, and bone regeneration is not facilitated are successfully solved.

The invention relates to bio-based flame-retardant polyurethane flexible foam with photo-thermal conversion performance and a preparation method and application thereof, and the preparation method comprises the following steps: reacting vanillyl alcohol (VA) with phenylphosphoryl dichloride (PPDC) to synthesize vanillyl alcohol-based phosphorus-containing dihydric alcohol, namely flame-retardant polyhydric alcohol (PPDVA); biomass castor oil is used as a raw material and is uniformly mixed with flame-retardant polyol, polytetrahydrofuran, MXene (Ti3C2Tx) powder, a foaming agent, a catalyst and a foam stabilizer, a precursor solution of a component A is prepared, isocyanate of a component B is added into the component A, and Ti3C2Tx-loaded polyurethane soft foam is obtained after foaming and curing; and dipping the Ti3C2Tx-loaded polyurethane flexible foam in a PDMS solution, carrying out ultrasonic treatment, and curing in a drying oven to obtain the bio-based flame-retardant polyurethane flexible foam with photo-thermal conversion performance. The polyurethane soft foam obtained by the invention has super-hydrophobicity, good photo-thermal conversion performance and good flame retardant effect, and can be used in the fields of oil-water separation and flame retardance; the preparation method is simple, green and environment-friendly.

The present invention discloses a core-shell structure PAA-PNIPAAm hydrogel material for environmental water collection, the method comprising the following steps: using ultraviolet irradiation method under low temperature conditions, first preparing a core layer poly N-isopropylacrylamide (PNIPAAm) macroporous hydrogel, then coating a layer of small-pore sodium polyacrylate (PAA) hydrogel with an open-pore structure on the surface of the PNIPAAm hydrogel to obtain a PAA-PNIPAAm hydrogel, and finally coating polydopamine (PDA) nanoparticles on the surface of the PAA-PNIPAAm hydrogel, and immersing it in a LiCl solution to obtain a core-shell structure PAA-PNIPAAm hydrogel environmental water collection material. This method is more environmentally friendly in existing preparation technology, the process is simple and easy to operate, and solves the problems of poor hygroscopicity, low water collection efficiency, and water evaporation in a low-humidity environment, and while ensuring good hygroscopicity of the material, it has excellent photothermal conversion and water release, and improves water collection efficiency, so the material can provide a promising solution for clean water production in arid and inland / remote areas.

The invention belongs to the technical field of electrostatic spinning materials, and particularly relates to a composite phase change electrostatic spinning nanofiber fabric and a preparation method and application thereof, and the fabric is obtained by depositing a nanofiber membrane on the surface of a composite phase change cotton fabric through an electrostatic spinning technology; the composite phase change cotton fabric is formed by dipping a cotton fabric in a composite phase change material solution, and the nanofiber membrane is a compound formed by an MXene solution and a high-molecular polymer. Compared with the prior art, the prepared P-M-PEG-coated SiO2 composite phase change nanofiber fabric has the advantages of good photo-thermal conversion performance, heat storage performance and moisture management performance, keeps the mechanical performance advantages of softness, bending resistance, durability and the like of the fabric, fits human skin in practical application and is comfortable, the preparation process is simple, the preparation period is moderate, and the preparation method is suitable for industrial production. The device can be applied to physical education, especially in a low-temperature environment, and passive heating after active warm-up is achieved.

The invention belongs to the technical field of nano materials, and provides a synthesis method and application of a p-tert-butyl thiacalix [4] arene protected silver cluster, and the synthesis method comprises synthesis of a p-methyl phenyl sulfide silver precursor, preparation of a mixture, synthesis of a compound 1, synthesis of a compound 2 and contrast of the mixture of the compound 1 and the compound 2. The synthesis of the p-methyl phenyl sulfide silver precursor comprises AgNO3, acetonitrile, p-MePhSH, Et3N and an ethanol solution, and the mixture comprises (p-MePhSAg) n, H4TC4A, K2Cr2O7, DMF (Dimethyl Formamide) and PhCOOAg. Aggregation of generated Ag (0) atoms is regulated by regulating and controlling reduction kinetics of DMF to realize regulation and control of a silver core, a compound 1 and a compound 2 are synthesized, the compound 1 shows good photo-thermal conversion performance as a photo-thermal conversion agent, and the compound 2 shows good detoxification capacity as a catalytic degradation agent of nitro aromatic chemical substances.

The invention belongs to the technical field of new materials and energy conservation and environmental protection, and particularly relates to a preparation method and application of copper ferrocyanide / molybdenum disulfide / graphene oxide photo-thermal aerogel. Graphene oxide dispersion liquid and molybdenum disulfide dispersion liquid are mixed and subjected to ultrasonic treatment, hydrogen peroxide and a polyacrylic acid aqueous solution are added, then the mixture is transferred to a high-temperature hydrothermal kettle, and the mixture is subjected to hydrothermal reaction; after the reaction is completed, freezing and drying a product to obtain molybdenum disulfide / graphene oxide aerogel; and growing copper ferrocyanide on the surface of the molybdenum disulfide / graphene oxide aerogel to obtain the copper ferrocyanide / molybdenum disulfide / graphene oxide aerogel. The copper ferrocyanide particles grow on the surface of the molybdenum disulfide / graphene oxide aerogel, and the light capturing and absorbing capacity of a solar interface distillation system of the molybdenum disulfide / graphene oxide aerogel is improved by utilizing the photo-thermal absorbing capacity of the copper ferrocyanide; semi-volatile organic pollutants evaporated from the wastewater are effectively degraded through the photo-Fenton reaction, and the utilization efficiency of the wastewater is improved.

The invention relates to an organic micromolecule photo-thermal material, an evaporator system containing the photo-thermal material, a preparation method and application of the photo-thermal material, and particularly, the photo-thermal material provided by the invention has excellent photo-thermal performance including a narrow energy gap of 0.77 eV, a wide absorption spectrum of 250-1840 nm and photo-thermal conversion efficiency of 26.75% under simulated sunlight. The temperature can be quickly increased to 68 DEG C under simulated sunlight (the light intensity is 1kW m <-2 >), and the temperature can reach 140 DEG C under the condition of strong light (4kW m <-2 >). In addition, the material shows excellent light stability, and still keeps stable after multiple heating / cooling cycles and long-time illumination. The application range is wide, efficient conversion from light to heat to electricity can be achieved, a flexible evaporator and a water-electricity co-production system driven by solar energy can be constructed, and the system is particularly suitable for providing energy and fresh water for remote areas.

The invention discloses a multifunctional film material with a cellulose-graphene-MXene hybrid interwoven structure and a preparation method thereof. The preparation method comprises: step 1: surface functionalization of MXene nanosheets to grow a layer of polydopamine coating on the MXene nanosheets in a Tris buffer; step 2: extracting cellulose from corn stalk powder to obtain cellulose slurry; step 3: pouring functionalized MXene and graphene into the cellulose slurry together, stirring until the mixture is uniformly mixed, and then ball milling to obtain a mixed slurry; step 4: mixing the mixed slurry obtained in step 3 with PVA and heating, pouring the mixed solution into a mold and drying to obtain a multifunctional composite film; the material has a wide source of raw materials, a simple preparation process, low cost, and no pollution, and the prepared multifunctional composite material with a cellulose / graphene / MXene hybrid interwoven structure has excellent photothermal performance, high flexibility, good thermal conductivity and photothermal conversion performance, high wear resistance and recyclability.

This invention discloses a GTR membrane, its preparation method, and its application, belonging to the field of biomedical materials technology, and solves the problem of insufficient antibacterial effect of existing GTR membranes. The method includes the following steps: uniformly dispersing BaTiO3 in a Tris buffer solution; dissolving dopamine hydrochloride powder in the reaction system; stirring evenly; centrifuging to collect the precipitate; cleaning and drying to obtain PDA@BaTiO3 nanoparticles; adding the PDA@BaTiO3 nanoparticles to a silver ammonia solution; stirring at room temperature; centrifuging to collect the precipitate; cleaning and drying to obtain Ag@PDA@BaTiO3 particles; uniformly dispersing the Ag@PDA@BaTiO3 particles in a hexafluoroisopropanol solution of L-polylactic acid; electrospinning the reaction system to obtain a fiber membrane; and sequentially subjecting the membrane to ventilation, high-temperature annealing, and natural cooling to room temperature to obtain the GTR membrane. The GTR membrane provided by this invention possesses both piezoelectric and photothermal effects, exhibits rapid sterilization and long-lasting antibacterial activity, and has a simple preparation process.

The invention discloses a CNF / MXene@Ga electromagnetic shielding composite film and a preparation method thereof, comprising dispersing MXene in water, adding metal Ga, first ultrasonicating at room temperature, and then ultrasonicating under ice bath conditions to obtain a uniform MXene@Ga aqueous dispersion; adding cellulose nanofiber CNF to the dispersion and mixing evenly, performing vacuum-assisted filtration, and then adding a water-soluble organic solvent with a boiling point lower than that of water to continue vacuum filtration, performing solvent exchange, repeating multiple times, and after the organic solvent is drained, removing the film and drying it to obtain a CNF / MXene@Ga electromagnetic shielding composite film. The electromagnetic shielding composite film has a multilayer structure stacked layer by layer, and also has good flexibility and tensile strength, and at the same time has the functions of electromagnetic shielding, Joule heating, photothermal conversion, etc.

The invention relates to photo-thermal reagent nano-particles with photoacoustic imaging, fluorescence imaging and photo-thermal therapy functions and a preparation method and application thereof.The photo-thermal reagent nano-particles are prepared from a photo-thermal reagent and amphiphilic molecules, and the photo-thermal reagent has the structure shown in the general formula A, the absorption and emission wavelength of the photo-thermal reagent nano-particles is located in a near-infrared region of 1100-1300 nm, and the photo-thermal reagent nano-particles show strong near-infrared absorption and emission characteristics, excellent biocompatibility, as high as 69.17% of photo-thermal conversion efficiency and 0.5-0.6 cm of deep tissue penetrating power. After water-soluble modification, the photo-thermal reagent nano-particles can be used as a photo-acoustic and fluorescence imaging agent, efficient enrichment of tumor parts is realized through multi-mode imaging guidance, and the photo-thermal reagent nano-particles have excellent photo-thermal conversion performance and can effectively kill superficial and deep tumors. In addition, the biological safety of the photo-thermal reagent nano-particles is good, and the application potential of the photo-thermal reagent nano-particles in the field of biomedicine is further improved. General formula A # imgabs0 #

The invention provides a preparation method of a composite catalytic material capable of degrading rhodamine B in organic wastewater. The preparation method comprises the following steps: (1) loading isodecyl acrylate on the surface of a foam iron matrix; (2) synthesizing poly (acrylamide-iso-decylacrylate) on the surface of the foam iron matrix by utilizing a polymerization reaction between an acrylamide monomer and an iso-decylacrylate monomer; and (3) assembling a BiCu2O6STe5 / Bi2BrTmO4 nano crystal on the surface of the poly (acrylamide-iso-decylacrylate). The composite catalytic material prepared by the method disclosed by the invention has a wide absorption spectrum and excellent and stable performance of photo-thermally activating peroxymonosulfate to degrade rhodamine B organic dye.

The invention provides a sodium hydrosulfide-loaded iron monatomic nano-enzyme preparation as well as a preparation method and application thereof, and the sodium hydrosulfide-loaded iron monatomic nano-enzyme preparation is constructed by taking iron monatomic nano-enzyme as a drug carrier to load sodium hydrosulfide and taking hyaluronic acid as an encapsulating agent and a targeting agent. On one hand, hydrogen sulfide gas released by sodium hydrosulfide can inhibit the activity of catalase in tumor cells, and the chemical kinetic treatment effect of the iron monatomic nano-enzyme is enhanced; on the other hand, mitochondrial dysfunction can be caused by increase of active oxygen, ATP synthesis is reduced, expression of heat shock protein is reduced, and mild photothermal therapy based on the iron monatomic nano-enzyme is promoted.