76results about How to "Excellent photothermal conversion performance" patented technology

The invention provides a preparation method of multi-sized monodisperse gold nanoparticles. The preparation method of the multi-sized monodisperse gold nanoparticles includes the steps of (1) subjecting gold salt to a reduction reaction in water under the joint action of citrate and a first reducing agent to obtain seed crystals of the gold nanoparticles; (2) mixing chloroauric acid, citrate and a surfactant with water to obtain seed crystal growth liquid; (3) subjecting the seed crystals of the gold nanoparticles to iterative growth in the seed crystal growth liquid under the action of a second reducing agent so as to obtain the multi-sized gold nanoparticles. The preparation method and application of the multi-sized monodisperse gold nanoparticles have the advantages that with the surfactant coating the different particle diameters of monodisperse gold nanoparticles evenly during gradual growth, particle agglomeration is improved, and the problems that the gold nanoparticles with large particle diameters are widely dispersed and poor in monodispersity are solved, so that the gold nanoparticles can give full play to a photo-thermal transformation performance under a light condition.

The invention discloses aerogel, a preparation method thereof and an application of the aerogel as a solar evaporator. The aerogel consists of a water supply layer and a light absorption layer; the preparation process of the water supply layer mainly comprises the following steps: preparing a solution, carrying out radial freezing, carrying out low-temperature ultraviolet radiation crosslinking, carrying out freeze drying and carrying out pretreatment; and the preparation process of the light absorption layer mainly comprises the following steps: preparing a solution, carrying out unordered freezing, carrying out low-temperature ultraviolet radiation crosslinking, carrying out freeze-drying, completely immersing the aerogel into a prepared carbon nano-tube dispersion liquid, and carrying out freeze drying. In addition, when the aerogel is used as the solar evaporator, the water supply layer at the lower layer provides water for the light absorption layer at the upper layer, and the light absorption layer at the upper layer absorbs solar energy to convert the solar energy into heat energy for evaporating water, so that the water is transmitted from the water supply layer to the light absorption layer.

The invention discloses a phase-change composite material with a photo-thermal conversion function and a preparation method thereof, and belongs to the cross field of phase-change energy storage and energy conversion. The multifunctional phase change composite material is prepared by combining Ti2O3 nano particles with a heat storage phase change material for the first time, so that a photo-thermal conversion function is expected to be provided on the basis of phase-change heat storage and temperature control functions, and the carbon foam-based phase-change composite material which is is easy to cut and process, has a controllable appearance size, has light weight and flexibility, and has photo-thermal conversion performance is provided. Due to the three-dimensional porous carbon foam matrix of the phase change composite material, the phase-change material can be stably stored, and the storage capacity can be regulated and controlled. The phase-change composite material has excellent photo-thermal conversion and temperature adjusting functions and can be used in the aspects of heat energy storage and release, thermal insulation, photo-thermal conversion, infrared stealth and infrared decoy of military equipment, and the like.

The invention relates to a photothermal preparation based on biliverdin, comprising biliverdin, biliverdin gel, biliverdin- Metal chelates, biliverdin-Biomolecular complex, biliverdin-Biomolecule-Metal functional assembly. The photothermal preparation has the following advantages: 1) near-infrared absorption and good tissue penetration depth, The preparation of this series of biliverdin-based photothermal preparations is of great significance for the development of multifunctional phototherapeutic drugs, and has great potential applications in tumor, dermatosis (such as pigment diseases), vascular diseases and so on. 3) Biocompatibility and metabolic mechanism are clear.

The invention belongs to the fields of chemical materials, high polymer materials and the like, and relates to a self-floating photothermal conversion hydrogel material with improved photothermal conversion efficiencyfor seawater desalination as well as a preparation method and application of the self-floating photothermal conversion hydrogel material. The self-floating photothermal conversion hydrogel is successfully prepared in a physicochemical double-crosslinking mode by combining hydrogel matrix macromolecules and a photothermal conversion component, wherein the hydrogel matrix macromolecules are prepared by blending a hydroxyl-containing hydrophilic polymer aqueous solution in the presence of acrylamide, an initiator, a crosslinking agent and aerogel, and the photothermal conversioncomponent refers to cuttlefish juice. The prepared self-floating photothermal conversion hydrogel has good mechanical properties, good sunlight absorption performance and good water surface thermal positioning performance, the preparation process is simple, the energy consumption is low, and the self-floating photothermal conversion hydrogel has good reusability, is suitable for practical application and is an ideal choice for seawater desalination and water purification.

The invention provides a preparation method of a multifunctional conjugated polymer gel-based composite. The method comprises the following steps: sodium alginate is dissolved in a solvent and stirredto be completely dissolved, mass percent concentration of dissolved sodium alginate is 0.5%-3%, and sodium alginate is placed in ice water bath for cooling; conjugated polymer monomers are dispersedin the sodium alginate solution, a mixed solution is obtained, and the conjugated polymer monomers are one of pyrrole, thiophene, aniline and dopamine; a metal cation compound is added to the mixed solution, the metal cation compound is one of ferric chloride hexahydrate and aluminium chloride, and the multifunctional conjugated polymer gel-based composite can be obtained after sufficient reaction. Drug supported conjugated polymer gel can be obtained by adding an anti-cancer drug to the sodium alginate solution. The prepared conjugated polymer gel-based composite has excellent photothermal conversion performance and good biocompatibility and can be applied to safe and efficient photothermal therapy of tumor.

The invention provides a composite hydrogel, a preparation method and application thereof, and a method for stimulating and responding to the composite hydrogel by multiple factors, and belongs to thetechnical field of shape memory polymer materials. The composite hydrogel provided by the invention comprises polyvinyl alcohol hydrogel embedded with sodium carboxymethyl cellulose and dopamine, andthe polyvinyl alcohol hydrogel has a network structure obtained by cross-linking reaction among polyvinyl alcohol molecules; the embedding amount of the sodium carboxymethyl cellulose is 5-100 g/L; the embedding amount of the dopamine is 0.5 g/L to 2.5 g/L. The composite hydrogel provided by the invention can achieve the technical effect of programmed shape recovery under the stimulation of triple factors, and can meet the market requirements.

The invention relates to preparation of thermosensitive liposome co-loaded with hollow gold nanoparticles and tumor therapeutic agents and triple integration application thereof. The preparation is mainly prepared from dipalmitoyl phosphatidylcholine (DPPC), hollow gold nanoparticles and therapeutic agents. A preparation method of the preparation comprises the following steps: preparing thermosensitive liposome via a conventional method, coating the thermosensitive liposome with the hollow gold nanoparticles by using a film extrusion method, and then coating the thermosensitive liposome with the therapeutic agents. The preparation is capable of reducing toxic and side effects of systemic drug therapy and is also capable of achieving the triple integration therapy effect with combination of drug therapy, thermal therapy and radiation therapy; the tumor killing effect is improved.

The invention discloses a nitrogen-doped porous carbon loaded ZnS nano composite material as well as a preparation method and application thereof. The preparation method comprises the steps: dissolving and dispersing zinc salt and sulfur-containing proteins into water; freeze drying and carrying out pyrolysis, to obtain the nitrogen-doped porous carbon loaded ZnS nano composite material. In the preparation process of the composite material, a template agent or acid-base does not need to be introduced for post-treatment; and the obtained nano composite material has a large number of pore passage structures, rich Lewis acid and alkaline sites and good photothermal conversion performance, shows excellent selectivity and high catalytic activity when being applied to CO2 cycloaddition reactionand methylation reaction under light driving, and has a wide prospect in the field of photothermal catalytic materials.

The invention relates to the technical field of photothermal conversion materials, in particular to an application of a basalt fiber fabric in photothermal conversion. The basalt fiber fabric is placed on the surface of a foam heat insulation layer to form a photothermal conversion layer, the basalt fiber fabric/foam heat insulation layer assembly is placed on the surface of water or the water isintroduced onto the basalt fiber fabric, the evaporation of the water is promoted through the photothermal conversion heating effect, and the modified basalt fiber fabric has better photothermal conversion capability. Compared with an existing photothermal conversion material, the basalt fiber has the advantages of being high in cost performance, high in tensile strength, good in corrosion resistance, long in service life and the like, and has a good application prospect.

The invention discloses a high-heat-preservation-property solar drying room comprising a room frame, walls and light-transmitting heat-insulation plates on the ceiling. The walls are fixed to the room frame and form the drying room. The inner side faces of the light-transmitting heat-insulation plates are coated with a light absorbing material so that sunlight transmitting the light-transmitting heat-insulation plates can be converted to heat, and the heat is evenly distributed into the room directly. Meanwhile, a controllable exhaust opening is formed in the ceiling. A ceramic solar panel is arranged in the drying room, heat converted from solar energy is directly distributed into the room in a thermal radiation mode, the heating effect is optimized, and therefore the drying room is more similar to an existing drying environment; besides, because the ceramic solar panel has good photo-thermal conversion performance and heat-conducting property, it can be guaranteed that the temperatures at all the positions are basically identical, and the even heating effect is achieved; light-transmitting heat-insulation glass and outside heat preservation room design are adopted, and the double heat preservation effect can guarantee the continuous drying effect at night.

The invention discloses a nitrogen-doped carbon material loaded with aluminum single atoms as well as a preparation method and application thereof. The preparation method comprises the following steps: providing a first solution containing 1, 10-phenanthroline and a solvent, and a second solution containing an aluminum source and a solvent; mixing the first solution and the second solution, and then rapidly mixing with melamine, and grinding until the mixture is dry to obtain a solid compound; and sequentially carrying out first calcination and second calcination treatment on the solid compound in an inert atmosphere so as to obtain the nitrogen-doped carbon material loaded with the aluminum single atoms. In the nitrogen-doped carbon material loaded with the aluminum single atoms, aluminum is uniformly dispersed in a single atom state with high content, and aluminum and nitrogen form a coordination structure of AlN4. The preparation method of the nitrogen-doped carbon material loaded with the aluminum single atoms is simple, and the material structure is stable; the catalyst can be repeatedly used for five times or more, and the activity of the catalyst is basically unchanged; and meanwhile, the catalyst has the characteristics of good photo-thermal absorption and conversion, and is a stable, efficient and environment-friendly heterogeneous catalyst.

The invention discloses a water-drive photothermal impermeable building exterior wall, and belongs to the field of construction technology. Through the form of evenly arranging water-drive photothermal balls on the outer surface of the exterior wall and water phototatic composite tubes which are embedded in the exterior wall during construction and connected to the water-drive photothermal balls,once rainwater penetration occurs to the exterior wall, the water-drive composite tubes can absorb permeating water from the exterior wall and then transfer the permeating water to the water-drive photothermal balls to trigger the photo-thermal conversion action, through the water shrinkage feature of rear water shrinkage pull rods, reflective flaps on the surfaces of the water-drive photothermalballs are pulled to deform and fit along photothermal ball grooves, internal photothermal conversion layers are unfolded, the photothermal conversion layers are matched with the reflective flaps to absorb light and convert light into heat energy, and heat is also transmitted to the depths of the exterior wall through the water-drive composite tubes for heating and evaporating the permeating water,then water vapor flows from the water-drive composite tubes to the photothermal ball grooves and dissipates to the outside, thus, the water penetration problem of the exterior wall can be effectivelysolved, and the service life of the exterior wall is prolonged.

The invention discloses a method for preparing photo-thermal fibers through microfluid air jet spinning. The method is characterized by comprising the following steps of dissolving a polymer in a solvent, preparing a uniform solution, transferring the uniform solution into a needle tube, performing microfluid air jet spinning to prepare fibers, and performing in-situ polymerization of a photo-thermal material to obtain the photo-thermal fibers, so that the photo-thermal performance of the fibers can be greatly improved, and the water evaporation rate and the photo-thermal conversion efficiency can be increased. In the spinning reaction process, an external heat source is not needed to maintain polymerization of the whole system, controllability is achieved, the spinning reaction time is relatively short, energy is saved, and pollution is avoided; and through in-situ synthesis, a stable and efficient method is provided for rapid preparation of the photo-thermal fibers, and the method has industrialization prospects.

The invention discloses an MXene nanosheet loaded rare earth luminescent nanocrystalline composite material, which is a water-soluble nanosheet composite material formed by compounding a two-dimensional MXene nanosheet with negative electricity on the surface and a rare earth luminescent nanocrystalline without a surface ligand and with positive electricity through electrostatic adsorption and further modifying the two-dimensional MXene nanosheet and the rare earth luminescent nanocrystalline. The invention also discloses a preparation method and application of the composite material. The preparation method comprises the following steps: loading rare earth luminescent nanocrystals with positive charges on the surfaces of electronegative two-dimensional MXene nanosheets, and then carrying out surface modification to obtain the water-soluble two-dimensional MXene nanosheet loaded rare earth luminescent nanocrystal composite material. The material has the advantages of being good in biocompatibility, good in photothermal conversion performance and photothermal stability, strong in biological tissue photothermal ablation capacity and the like, and the preparation method is simple and high in repetition rate. The material has good fluorescence property and magnetic resonance imaging capability, and can be applied to fluorescence and magnetic resonance imaging dual-mode imaging in a living body.

The invention relates to the field of environment-friendly materials, aims to problems that in the prior art, the impact resistance is poor and the light to heat capability is poor, and discloses a method for preparing carbon cloth surface covering copper-bismuth nanoparticles for seawater desalting. The method comprises the following preparation steps: putting carbon cloth into deionized water and a dilute nitric acid solution in sequence, and performing activation; preparing a mixed solution that the mass ratio of bismuth salt to citric acid is (1-1.5):(0.8-1), putting the activated carbon cloth into the mixed solution, performing a reaction, further performing heating to 75-85 DEG C, performing a reaction for 1.8-2 hours, further performing heating to 150-170 DEG C, performing a reaction for 8-10 hours, performing cooling to the room temperature, performing cleaning, and performing vacuum drying; and putting the obtained bismuth-based carbon cloth into a 0.5-1mol/L copper salt solution, performing drying, and further performing calcining in the presence of argon. The invention provides a material with good light absorption, a photo-thermal conversion capability and pole strength, the diffuse reflectance of the surface of the material to light can be effectively reduced, and effective absorption of full-wave bands of sunshine can be achieved.

The invention discloses a noble metal ruthenium monatomic supported catalyst as well as a preparation method and application thereof. The catalyst comprises a sulfide carrier and ruthenium dispersed on the surface of the sulfide carrier in a monatomic form, and the proportion of single ruthenium atoms is 0.01-10% by mass of the ruthenium-based catalyst. The CO2 adsorption capacity, the photo-generated charge separation capacity, the light absorption capacity, the photo-thermal conversion capacity and other properties of the catalyst are obviously improved. The preparation method has the advantages of simple and rapid preparation and cost saving, and can realize monatomic dispersion of high-specific-gravity noble metal ruthenium on the surface of cadmium sulfide. According to the monatomic dispersed ruthenium noble metal catalyst prepared by the method, the dispersity of noble metal is improved, the use cost of the noble metal is reduced, and the photo-thermal catalytic reduction of CO2 and high CH4 selectivity of the catalyst are ensured.

The invention provides a near-infrared light response electrostatically spun polycaprolactone/molybdenum disulfide (PCL/MoS2) nanofiber membrane. The nanofiber membrane is composed of PCL and MoS2 and has a fiber web structure with high porosity, and the diameter of the fiber ranges from 150 nm to 350 nm. According to the invention, the PCL/MoS2 nanofiber membrane with photo-thermal performance is prepared by utilizing an electrostatic spinning technology, and the nanofiber membrane has good biocompatibility, mechanical performance and photo-thermal conversion performance, is expected to become a relatively ideal bone tissue engineering scaffold, and is expected to be applied to regeneration and repair of bone defects clinically.

The invention discloses a polymer composite microsphere, a preparation method and a drug loading application thereof. The polymer composite microsphere is characterized in that the grain size of the polymer composite microsphere is 170-350nm. The preparation method comprises the following steps: firstly, using dopamine hydrochloride for preparing a core of the composite microsphere; adding the core of the composite microsphere, methacrylic acid, cross-linking agent and initiator into a solvent; adopting a distilling precipitation polymerization method for preparing the polymer composite microsphere. The preparation method provided by the invention is simple and easy; a series of polymer composite nanospheres are acquired by coating a polymer shell layer on the exterior of the nanospheres with an excellent photo-thermal conversion performance; the polymer shell layer is capable of breaking and degrading through disulfide bond-sulfydryl exchange reaction under a reducing condition, so that the drug can be quickly and fully released; the drug therapy is capable of achieving an effect of photo-thermal therapy.

The invention relates to a preparation method of a photo-thermal enhanced antibacterial biomass/graphene aerogel uranium adsorbent, which is characterized in that graphene oxide, antibacterial biomass and amidoximated diaminomaleonitrile are used as raw materials, and the photo-thermal enhanced antibacterial biomass/graphene aerogel uranium adsorbent is prepared by a hydrothermal one-step synthesis method. The prepared uranium adsorbent has high mechanical strength, high photo-thermal conversion capacity and high antibacterial and anti-pollution performance, has unique and excellent adsorption performance on hexavalent uranium, is good in material stability and high in repeated utilization rate, and still has high adsorption performance after 10 times of cyclic regeneration.

The invention provides a pleurotus eryngii-based photo-thermal conversion material and a preparation method thereof. The preparation method comprises the following steps: cutting pleurotus eryngii according to the growth direction of the pleurotus eryngii, performing vacuum freeze drying, putting the cut pleurotus eryngii into a photothermal conversion material modification reaction solution, reacting for a certain time to enable the photothermal conversion material to be adsorbed on the porous structure and the surface of the pleurotus eryngii, and performing vacuum freeze drying to obtain the pleurotus eryngii-based photothermal conversion material. According to the invention, the dopamine is ingeniously adhered to the surface and pore walls of the pleurotus eryngii by utilizing the super-strong adhesiveness of the dopamine hydrochloride and the porous property of the pleurotus eryngii, so that the photo-thermal conversion material integrating a photo-thermal conversion part, a heat preservation part and a moisture transmission part is obtained. Water can be automatically transported from bottom to top through the wicking effect, heat can be preserved so as to reduce heat loss, and the method has the advantages of being low in cost, easy to operate, capable of being naturally degraded, environmentally friendly and the like.

The invention belongs to the field of environmental nano materials, and particularly relates to delta-MnO2/SiO2 composite nanofiber with a light-driven thermal degradation function and preparation andapplication thereof. Surface of SiO2 nanofiber serving as matrix is loaded with delta-MnO2 particles, forming the delta-MnO2/SiO2 composite nanofiber with the light-driven thermal degradation function. The preparation comprises the steps: placing the SiO2 nanofiber into a reaction system taking a permanganate solution and alcohol as raw materials to allow for in-situ deposition, and calcining toobtain the SiO2 composite nanofiber. The composite nanofiber has light-driven thermocatalytic degradation performance, allows for efficient and rapid degradation of volatile organic matters, eliminates the pollution of the volatile organic matters in the environment and is beneficial to environmental remediation, the preparation method is simple and easy to perform, secondary pollution is avoided,the raw materials are cheap and easily available, the conditions are mild, equipment and environmental requirements are low, and the composite nanofiber has a good application prospect.