32results about How to "Efficient light-to-heat conversion efficiency" patented technology

The invention discloses a flexible metal organic framework/gelatin composite film as well as a preparation method and application thereof, and the preparation method comprises the following steps: (1) mixing a hydroxide nanowire solution and a gelatin aqueous solution, uniformly stirring, and performing suction filtration on a flexible porous substrate to obtain a hydroxide nanowire/gelatin composite film; and (2) soaking the hydroxide nanowire/gelatin composite film in a glutaraldehyde aqueous solution for a cross-linking reaction, and then soaking the hydroxide nanowire/gelatin composite film in an organic ligand solution for a reaction after the cross-linking reaction to obtain the flexible metal organic framework/gelatin composite film. The invention has the characteristics of simple preparation, large-scale production, wide application prospect and the like, and provides a new way for designing a solar interface seawater desalination device for water-electricity co-production.

The invention discloses a polydopamine-coated Prussian blue and silver-loaded nano-composite material, and a preparation method and an application thereof. The composite material is formed by coatingPrussian blue with polydopamine and then growing nano-silver on the polydopamine in situ, and the particle size of the composite material is 100-150 nm. The preparation method comprises the followingsteps: reacting potassium ferricyanide with polyvinylpyrrolidone to obtain Prussian blue, adding dopamine into a Tris-HCl solution of Prussian blue to prepare polydopamine-coated Prussian blue, and mixing and stirring the obtained polydopamine-coated Prussian blue dispersion, ammonia water, a reducing agent and a silver nitrate solution to react in order to make nano-silver grows on the coating layer polydopamine in situ in order to obtain the product. The nano-composite material has a good antibacterial effect, is not prone to causing drug resistance of bacteria, has good stability and dispersity, the preparation method has the advantages is simple and mild, short in time consumption, low in energy consumption and easy to realize large-scale production, and the nano-composite material canbe used for preparing photo-thermal antibacterial drugs or chronic traumatic infection treatment drugs.

The invention provides a preparation method of a graphene-based photothermal conversion material. The preparation method of the graphene-based photothermal conversion material comprises performing hydrothermal reaction, solvothermal reaction and mixed solvothermal reaction on a single-layer graphene oxide dispersion; removing water and organic solvent, and performing high-temperature calcination and ozone treatment to obtain the graphene-based photothermal conversion material. The invention also provides the graphene-based photothermal conversion material prepared through the method and application thereof. The graphene-based photothermal conversion material can be applied to various photothermal conversion devices.

The invention provides a magnetic octahedral platinum-doped gold nano-shell. According to the octahedral platinum-doped gold nano-shell, a metal organic framework material is taken as a template, andthe surface of the octahedral platinum-doped gold nano-shell is modified by an amido bond magnetic protein gadolinium complex. The invention further provides a preparation method and application of the magnetic octahedral platinum-doped gold nano-shell. The synthesized gold nano-shell takes the MOFs material as the template, the method is rapid, simple, convenient, stable and reliable, productionis easy to expand, the better photothermal conversion efficiency is achieved, redundant hydrogen peroxide in a tumor microenvironment can be catalyzed by platinum nano-particles to generate oxygen soas to relieve the hypoxic condition of tumors, and therefore, the spatial and time resolution of CT imaging is promoted, and more accurate imaging is conducted on hypoxic tumors; and the property is stable, good dispersity and biocompatibility are achieved, and the used raw materials are easy to obtain and low in price.

The invention discloses a bionic bismuth nanoflower as well as a preparation method and application thereof, and belongs to the technical field of medicines. The bionic bismuth nanoflower comprises a cell membrane and a bismuth nanoflower body, and the cell membrane serves as a shell to wrap the surface of the bismuth nanoflower body. The bionic bismuth nanoflower disclosed by the invention not only has good biological safety and physiological environment degradability, but also has the characteristics of good NIR II photo-thermal conversion efficiency, radiotherapy sensitization and CT/PAI dual-mode imaging, and is a novel diagnosis and treatment integrated carrier integrating photo-thermal and radiotherapy.

The invention relates to the technical field of heating equipment, in particular to novel solar heating equipment. The novel solar heating equipment comprises a box body and a heat collection pipe. The box body is made of a transparent material and is provided with an air inlet and an air outlet, the air outlet is located on the indoor side, and the air inlet is located on the outdoor side. The heat collection pipe communicates with the air inlet and the air outlet, the heat collection pipe is located in the box body, and the box body is located outdoors. According to the scheme, the novel solar heating equipment is simple in structure, the solar energy can be used for conducting heating only through the transparent box body and the heat collection pipe which is made of an aluminum foil material, the cost is low, the novel solar heating equipment is practical, no pollution is caused to the environment, and the novel solar heating equipment is suitable for being used for heating workshops of a plant and bungalows.

The invention discloses a ferroferric oxide/bismuth sulfide nanocomposite and a preparation method and application thereof. The preparation method comprises the following steps: dispersing Fe3O4 and dopamine into a Tris-HCl buffer solution to obtain Fe3O4@PDA nanoparticles; dispersing a bismuth source in a solvent, and then dropwise adding the bismuth source into a bovine serum albumin solution toobtain BSA-Bi2S3 particles; dispersing the Fe3O4@PDA nanoparticles into a Na2HPO4-NaH2PO4 buffer solution, adding the BSA-Bi2S3 particles to obtain Fe3O4@PDA@BSA-Bi2S3 nanoparticles. The nanocomposite obtained by the invention is easy to prepare and non-toxic, and has good biocompatibility, colloid stability and MRI & CT contrast effect at cellular and animal levels.

The invention provides a targeting nanomaterial with a cell membrane coated with Au-Fe3O4 as well as a preparation method and application of the targeting nanomaterial, belonging to the technical field of targeting nanomaterials. The targeting nanomaterial provided by the invention comprises a cancer cell membrane, Au-Fe3O4 nanoparticles, tannic acid and phorbol 12-myristate 13-acetate, wherein the Au-Fe3O4 nanoparticles, the tannic acid and the phorbol 12-myristate 13-acetate are wrapped in the cancer cell membrane. PMA can effectively stimulate cells to generate H2O2 and active oxygen O2 <->, can supplement insufficient H2O2 in cancer cells, and can supplement raw materials for Fenton reaction; the Fe3O4 can be partially decomposed in the presence of the tannic acid to form Fe<2+> and Fe<3+>, Fe<2+> can catalyze H2O2 in the cancer cells to be decomposed into hydroxyl radicals, and TA can promote rapid conversion of Fe<3+> generated by Fe3O4 into Fe<2+>; and meanwhile, Au and Fe3O4 have good photo-thermal conversion efficiency, and can give full play to the therapeutic effect of PTT.

The invention belongs to the field of biomedical materials, and particularly relates to a copper-based nano photo-thermal material, a preparation method thereof and application of the copper-based nano photo-thermal material in cancer treatment. The photo-thermal material is of a core-shell structure formed by wrapping a copper selenide nano ellipsoid with a coating layer formed by polydopamine and AIPH. The photo-thermal material disclosed by the invention has a good photo-thermal effect and controllable release performance of oxygen free radicals at tumor sites, can greatly improve the treatment effect, and can be used for combined treatment of cancers.

The invention particularly relates to a black cerium dioxide nano-material and a preparation method thereof, and belongs to the technical field related to preparation of cerium dioxide nano-materials.The preparation method of the black cerium dioxide nano-material comprises the following steps: mixing a cerium salt solution with an alkali liquor, and stirring to obtain a precipitate, wherein themolar concentration ratio of the cerium salt solution to the alkali liquor is 1:(100-200); adding the precipitate into liquid nitrogen, and carrying out low-temperature treatment to obtain blue crystals; unfreezing and drying the blue crystals to obtain yellow cerium oxide; and carrying out a reduction reaction on the yellow cerium oxide at the temperature of 500-800 DEG C under the hydrogen condition to obtain the black cerium dioxide nano-material which is stable at room temperature. The black cerium dioxide nano-material prepared by the method has excellent photo-thermal conversion efficiency, waste gas catalytic treatment, carbon dioxide catalytic reduction and other application values.

The invention discloses a polysiloxane aerogel composite material for efficient water evaporation. The polysiloxane aerogel composite material uses cerium-doped nano-powder as supporting powder and hydrophilic polysiloxane aerogel as a supporting carrier, and a cerium-doped nano-powder is an efficient photothermal conversion material. The hydrophilically modified polysiloxane aerogel has unique structural characteristics, substrate loading can be easily realized, meanwhile, the aerogel has the advantages that the thermal conductivity is low and a 3D porous structure is realized and the salt are not prone to being enriched and crystallized, the rapid passing of water vapor is realized, and the characteristics of efficient light absorption, light conversion, water transport and water evaporation are achieved. The invention further discloses a preparation method of the polysiloxane aerogel composite material for efficient water evaporation and application of the material in seawater desalination or industrial sewage treatment.

The invention provides a titanium nanosheet/graphene-based heating film which comprises a first transparent insulating layer, an electrode, a second transparent insulating layer and a titanium nanosheet/graphene-based fiber membrane, wherein the first transparent insulating layer covers one surface of the titanium nanosheet/graphene-based fiber membrane; the second transparent insulating layer covers the other surface of the titanium nanosheet/graphene-based fiber membrane, one end of the electrode is electrically connected with the titanium nanosheet/graphene-based fiber membrane, and the other end of the electrode extends out of the first transparent insulating layer or the second transparent insulating layer. According to the titanium nanosheet/graphene-based heating film, by means of the efficient photo-thermal conversion efficiency and electro-thermal conversion efficiency of the titanium nanosheet/graphene-based fiber film, the electro-thermal and photo-thermal diversified heat production functions are achieved.

The invention belongs to the field of photo-thermal functional coordination polymer materials, and discloses a three-dimensional carboxylic acid copper fullerene metal organic framework material as well as a preparation method and application thereof. The chemical formula of the material is {[Cu3 (C5F6O4) 3/2 (H2O) 3] 2 [([mu]3-[eta]2: [eta]2: [eta]2) 2-C60]. 2.5 (C11H10)} n, wherein n is a non-zero natural number. The preparation method of the material comprises the steps of mixing hexafluoroglutaric acid, cuprous oxide and a 1-methylnaphthalene solution of C60, and performing ultrasonic treatment, heating, cleaning and drying to obtain the material. The three-dimensional carboxylic acid copper fullerene metal organic framework material in a single crystal form is rapidly prepared through a solvothermal synthesis method, the photo-thermal conversion efficiency of the prepared material reaches up to 86.19%, and the prepared material has good photo-thermal stability, can be recycled for multiple times and has a huge application prospect in the aspects of photo-thermal functional materials and laser adjuvant therapy.

The invention relates to 2,2-di-cyano methylene thiazole. The chemical structure of the 2,2-di-cyano methylene thiazole is shown in a formula (I). The 2,2-di-cyano methylene thiazole is prepared through a reaction of 2-(4-(4-cyanophenyl)thiazole-2(5H)-methylene)malononitrile and 4-(diphenyl amino)benzaldehyde. The 2,2-di-cyano methylene thiazole has near-infrared absorption performance, high photo-thermal conversion efficiency, and excellent light stability and thermal stability, and can be used as a photo-thermal agent.

The invention discloses a mitochondrial targeting photo-thermal/chemotherapy synergistic nano-drug delivery particle as well as a preparation method and application thereof, and the nano-drug delivery particle successfully introduces lipid-DOX into a system through the mutual insertion effect of Au-S and lipid, and realizes PTX loading. In-vitro related experiments show that the system has obvious mitochondrial targeting property, and can stimulate the generation of endogenous reactive oxygen species (ROS) to realize the efficient tumor inhibition effect based on the mitochondrial pathway. An in-vivo anti-tumor experiment result shows that the system can generate an excellent anti-tumor effect through a photo-thermal-drug-oxidative stress synergistic effect.

The invention provides a carbon-based phase change energy storage material for solar direct photo-thermal conversion and a preparation method, and belongs to the technical field of phase change composite materials. The heat-conducting reinforced phase-change material comprises heat-conducting reinforced phase-change material particles and a carbon-based photothermal conversion enhancer coating the surfaces of the heat-conducting reinforced phase-change material particles, and the mass percentage of the heat-conducting reinforced phase-change material particles to the carbon-based photothermal conversion enhancer is (75-95): (5-25); the heat-conducting reinforced phase-change material particles comprise an organic phase-change material matrix and a carbon-based high-heat-conductivity porous material. According to the invention, the organic phase change material matrix, the carbon-based high-thermal-conductivity porous material and the carbon-based photothermal conversion enhancer are combined through the specific coating structure, so that the effects of enhancing the thermal conductivity and improving the photothermal conversion capability of the two carbon-based materials on the phase change matrix can be fully exerted respectively; on the premise of ensuring the high thermal conductivity and excellent liquid leakage prevention capability of the carbon-based phase change energy storage material, the outstanding photothermal conversion performance is also endowed.

The invention belongs to the technical field of nanoparticle preparation, and discloses a composite nanoparticle with photoacoustic development and photothermal therapy functions. The composite nanoparticles with the photoacoustic development and photothermal therapy functions are formed by coupling graphene quantum dots (GQDs) of surface-PEGylated composite porphyrin molecules and copper sulfidenanoparticles (CuS) modified with hyaluronic acid on the surface. According to the preparation method, GQDs-PEG-P is coupled to the surfaces of the HA-CuS nanoparticles, so that the composite nanoparticles with the photoacoustic development and photothermal therapy functions are obtained. The composite nanoparticles with the photoacoustic development and photothermal therapy functions has the characteristics of good biocompatibility, remarkable photothermal conversion efficiency, excellent photostability and the like, can realize multiple functions of biosensing and tumor diagnosis and treatment, and is beneficial to practical application; and besides, the preparation process is simple, green and pollution-free, and can be popularized and used.