66 results about "Thermal decomposition method" patented technology

The invention discloses a component gradient iridium tantalum coating anode and a preparation method thereof, the component gradient iridium tantalum coating anode comprises a titanium-based bottom layer, a middle layer and a surface active layer structure with component gradient, and the middle layer and the active layer are both prepared through a thermal decomposition method. And the intermediate layer is prepared on the titanium substrate and is composed of TiO2 / Ta2O5 mixed oxide. The surface active layer is prepared on the outer side of the middle layer and comprises a plurality of layers of IrO2 / Ta2O5 oxide coatings with different iridium-tantalum proportions. Compared with a traditional uniform coating anode, the prepared component gradient iridium tantalum coating anode can relieve the stress concentration phenomenon and reduce coating cracking, the service life of the anode is remarkably prolonged, and the catalytic activity of the anode is remarkably improved; the modified carbon nano tube is added into the active layer precursor solution, so that the conductivity change caused by component gradient is improved, and the cell voltage of the component gradient iridium tantalum coating anode is effectively reduced; and moreover, the iridium content is lower, and the preparation cost of the electrode is reduced.

The invention discloses a preparation method of a nuclear magnetic resonance imaging contrast agent based on surface hepatocyte targeting molecule modification ferroferric oxide nanoparticles, which comprises the following steps: synthesizing ferroferric oxide nanoparticles (Fe3O4 NPs) by a thermal decomposition method, and connecting the Fe3O4 NPs with a ligand dopamine-PEG2000-EOB carrying hepatocyte targeting molecules by a ligand exchange method to obtain the nuclear magnetic resonance imaging contrast agent. The nanoparticles Fe3O4-EOB-PEG capable of carrying out selective T2 nuclear magnetic resonance imaging on the hepatocytes are formed. The method is simple and easy to operate, the controllability of the preparation process is high, the biocompatibility of the obtained product is good, T2 signals of hepatocytes can be remarkably improved, the good early diagnosis effect on liver tumors is achieved, and wide application prospects are achieved.

The invention discloses iron oxide nanoparticles capable of responding to particle size change in a tumor microenvironment and a preparation method of the iron oxide nanoparticles, and belongs to the technical field of biomedical nano materials. The nano-particle comprises an iron oxide nano-crystal core with the particle size of 3-5nm and a tumor microenvironment response layer coating the surface of the iron oxide nano-crystal core. The response layer contains groups, such as disulfide bonds, enzyme digestion peptide fragments and the like, which can respond to acidic pH, high-concentration reduced glutathione or matrix metalloproteinase and other tumor characteristic stimuli to generate structural changes. In a tumor microenvironment, the hydration particle size of the nanoparticles can be directionally and controllably converted from 3-20 nm to 20-100 nm (or reversely). The preparation method mainly comprises two steps of preparing the core by a thermal decomposition method and modifying the surface response layer. The technical problems of insufficient tumor targeted enrichment capacity, limited imaging contrast and difficulty in balancing permeation and retention caused by fixed particle size of the existing iron oxide nanoparticles are solved, and the accuracy and efficiency of tumor diagnosis and treatment can be remarkably improved.

The invention discloses a modified hollow cadmium sulfide photocatalytic reducing agent and a preparation method and application thereof, and belongs to the technical field of wastewater treatment.The preparation method comprises the steps that silicon dioxide microspheres and deionized water are mixed to prepare suspension liquid, a sodium citrate aqueous solution, a cadmium chloride aqueous solution, ammonia water and a thiourea aqueous solution are added into the suspension liquid, the mixture is stirred to be uniform and then heated for a reaction, and the modified hollow cadmium sulfide photocatalytic reducing agent is obtained; preparing to obtain a silicon dioxide and cadmium sulfide composite material; immersing the silicon dioxide and cadmium sulfide composite material into a sodium hydroxide solution, heating and etching to obtain nano hollow cadmium sulfide; the preparation method comprises the following steps: immersing nano hollow cadmium sulfide into a 1-octadecene solution, carrying out heating reaction, and carrying out alcohol washing and drying to obtain the modified hollow cadmium sulfide photocatalytic reducing agent. The modified hollow cadmium sulfide composite photocatalyst is synthesized through a silicon dioxide template method and a thermal decomposition method, and high-concentration methyl orange industrial wastewater can be efficiently degraded under the condition of visible light irradiation.

The invention belongs to a nano-particle preparation method, and provides a ferromanganese-containing base magnetic nano-particle and a preparation method thereof in order to solve the technical problems that the clinical transformation of the magnetic nano-particle in tumor immunotherapy is limited and the magnetic nano-particle cannot be practically applied. The preparation method comprises the following steps: preparing dopamine hydrochloride-polyacrylic acid-polyethylene glycol into a basic magnetic nano-material, modifying the basic magnetic nano-material to obtain a modified material dopamine hydrochloride-polyacrylic acid-polyethylene glycol in order to enable the basic magnetic nano-material to have good biocompatibility, reacting the basic magnetic nano-material with the modified material in a deionized water system, and carrying out ultrasonic treatment, stirring and centrifugal cleaning treatment to obtain the water-soluble magnetic nano-material. And finally, the prepared magnetic nano-material is subjected to functionalization treatment, the ferromanganese-containing base magnetic nano-particles with good biocompatibility are obtained, and a new strategy is provided for multifunctional synergistic treatment of gastric cancer.

This invention discloses a rare-earth permanent magnet powder with a TbCu7 structure and its preparation method. The TbCu7 structured rare-earth permanent magnet powder has an Sm... 1‑a Zr a Fe 9‑y‑z‑r Co y Ti z D r M x The preparation method involves using ultrasonic spray thermal decomposition or chemical co-precipitation to prepare spherical composite oxides from soluble metal salts, followed by reduction treatment at a certain temperature, and finally, high-temperature heating to control the introduction of nitrogen or carbon elements into the unit cell. The resulting magnetic powder is predominantly composed of the SmFe9 phase, effectively controlling the Th2Zn content. 17 Sm2Fe 17 The generation of impurity phases is controlled by the process optimization of this invention, resulting in magnetic powder with controllable morphology and particle size, while reducing rare earth loss, which has significant industrial value.

The invention relates to a high-first-effect quick-charge type nitrogen and phosphorus co-doped hard carbon negative electrode material, a preparation method thereof and a sodium ion battery. The preparation method comprises the following steps: crushing biomass by using a crusher to obtain biomass powder; deionized water is adopted to wash the biomass powder, and then the washed biomass powder is dried at a first preset temperature for a first preset time; uniformly mixing the pretreated biomass powder, an activating agent and a nitrogen doping agent according to a preset mass ratio; placing the mixed material in a first tubular furnace in an inert gas atmosphere for carbonization and calcination; cooling the calcined product to room temperature, taking out the calcined product, transferring the calcined product into an acid solution, stirring and cleaning, repeatedly washing the calcined product with deionized water until the calcined product is neutral, and drying the calcined product in a drying oven at a second preset temperature for a second preset time; the mode of high-temperature nitriding presintering and vapor phase phosphorus deposition is adopted, and element distribution uncontrollability, namely uneven distribution, of a traditional co-pyrolysis method is broken through.

The invention relates to the field of photovoltaic power generation, and mainly relates to a Fe2O3 nanorod array perovskite solar cell and a preparation method thereof. The preparation method of the Fe2O3 nanorod array perovskite solar cell is provided for solving the problems that in the prior art, a physical coating technology is complex in process, high in cost and low in production efficiency. A Nb-TiO2 compact layer is prepared through a hydrolysis-pyrolysis method, a Fe2O3 nano array is prepared through a hydrothermal method, a CH3NH3PbI3-xBrx thin film is prepared through a continuous two-step deposition method, a hole transport layer is prepared through a deposition method, and the Fe2O3 nano rod array perovskite solar cell is prepared. The method is simple and environment-friendly in process, low in cost and high in production efficiency.

The invention discloses cyclodextrin-mediated water-soluble rare earth nanoparticles and a synthesis method and application thereof in antibody coupling, and the method comprises the following steps: preparing uniform rare earth nanoparticles with different particle sizes by using a high-temperature thermal decomposition method, and carrying out self-assembly modification by using polyethylene glycol (PEG) derivative modification and carboxylated cyclodextrin (CM-CD) to obtain the cyclodextrin-mediated water-soluble rare earth nanoparticles. And coating the surfaces of the rare earth nanoparticles with PEG chain molecules or PEG (at) CM-CD composite molecules to obtain the modified water-soluble rare earth nanoparticles. And then mixing the modified water-soluble rare earth nanoparticles with 1-ethyl-(3-dimethylaminopropyl) carbodiimide (EDC) and N-hydroxysuccinimide (NHS), introducing NHS ester, and carrying out covalent coupling with an antibody to obtain the antibody-coupled rare earth nano probe. An electron microscope, a zeta potential test and an enzyme-linked immunosorbent assay detection kit test prove that the water solubility and the dispersity of the rare earth nanoparticles can be improved by carboxylated cyclodextrin modification, and meanwhile, the loading capacity and the affinity of a coupling antibody are improved.

The embodiment of the invention discloses a Ni < x > Fe < 3-x > O < 4 >-coated SiO2-coated Ni < O > super-hydrophobic-self-cleaning aerogel coating and a preparation method thereof, relates to the technical field of functional materials, and aims to overcome the defects of an existing composite coating. The preparation method of the Ni < x > Fe < 3-x > O < 4 > (at) SiO2 (at) NiO super-hydrophobic-self-cleaning aerogel coating comprises the following steps: preparing a magnetic nanosphere core Ni < x > Fe < 3-x > O < 4 > through a solvothermal method; the preparation method comprises the following steps: preparing Ni < x > Fe < 3-x > O < 4 > (at) SiO2 core-shell nanoparticles through a Stber method and a deposition-thermal decomposition method; and mixing the Ni < x > Fe < 3-x > O < 4 > (at) SiO2 core-shell nanoparticles with methyltrimethoxysilane, performing acid-catalyzed hydrolytic polycondensation, coating the surface of a base material with the mixture, and performing a normal-pressure drying process to obtain the Ni < x > Fe < 3-x > O < 4 > (at) SiO2 (at) NiO super-hydrophobic-self-cleaning aerogel coating.

This invention belongs to the field of inorganic functional material preparation technology, and specifically relates to a method for preparing α-Fe₂O₃ nanopowder by salt-assisted ultrasonic spray pyrolysis. First, an auxiliary salt and a ferric salt are dissolved in deionized water and ultrasonically prepared to form a precursor solution with an iron concentration of 0.01–1 mol / L. Then, the precursor solution is atomized in an ultrasonic atomizer with an ultrasonic frequency of 1.7–3 MHz, and the resulting droplets are collected. After collection, the droplets are ultrasonicated, filtered, and dried to obtain α-Fe₂O₃ nanopowder. This invention, by adding an auxiliary salt as a high-temperature solvent, solves the problems of severe agglomeration, large particle size, and poor uniformity in powders prepared by spray pyrolysis. The α-Fe₂O₃ powder obtained by the above method not only has small particle size, good uniformity and dispersibility, but the added auxiliary salt can also be recycled and reused.

The invention discloses quasi-paramagnetic ferrite nanoparticles prepared through asynchronous dynamic time sequence thermal decomposition and a method. According to the method, a first group of precursors and a second group of precursors with specific thermal decomposition temperature difference are added at a time, and the temperature and time of a plurality of stages such as preheating, nucleation doping, shell doping and grain growth in a programmed heating process are accurately controlled, so that effective coupling of asynchronous decomposition of the precursors and directional doping of core-shell components is realized. The quasi-paramagnetic ferrite nanoparticles prepared by the method have an ultra-small size of 2-6 nanometers, a core-shell structure and high monodispersity, the core part of the quasi-paramagnetic ferrite nanoparticles is an ordered phase rich in a first group of precursor metals, and the shell part of the quasi-paramagnetic ferrite nanoparticles is a disordered phase rich in a second group of precursor metals. The nano-particles show remarkably improved magnetic resonance imaging T1 relaxation efficiency which is far better than that of existing similar contrast agents, and can be used for preparing efficient and safe magnetic resonance imaging T1 contrast agents.

The application discloses a method for electrochemically treating anaerobic fermentation biogas slurry of kitchen waste, mainly comprising the following steps: 1. removing organic matters in the anaerobic fermentation biogas slurry of kitchen waste by electrochemical oxidation, thereby reducing the ammonia nitrogen content and COD value of the biogas slurry; 2. reducing residual hypochlorite in the biogas slurry after electrochemical oxidation in step 1 into chloride ions by a thermal decomposition method, a photo decomposition method or a catalytic decomposition method; 3. constructing a capacitor by using a chloride ion adsorption material and a sodium ion embedded electrode material, and adsorbing sodium chloride in the biogas slurry in step 2 by the capacitor capacitive deionization method; 4. discharging the capacitor adsorbing sodium chloride in a sodium chloride storage tank to resolve the sodium chloride, and returning the capacitor to step 3 to adsorb sodium chloride again after discharging, and repeating the cycle for multiple times until the sodium chloride content in the biogas slurry reaches the discharge standard; compared with the mainstream treatment process of the current anaerobic fermentation biogas slurry of kitchen waste, the method can greatly reduce energy consumption.

The invention discloses a rare earth doped aluminate nanocrystal capable of emitting light in a near-infrared second region through ultrasonic excitation as well as a preparation method and application of the rare earth doped aluminate nanocrystal. The preparation method comprises the following steps: mixing an alkaline earth metal ion compound, an aluminum ion compound, a rare earth ion compound and a polydentate ligand in water for complex reaction to prepare a metal ion chelate precursor; performing high-temperature solid-phase thermal decomposition reaction on the metal ion chelate precursor, performing surface fat-soluble molecular modification in a thermal solvent, and performing surface hydrophilization modification by adopting an amphiphilic polymer to prepare the rare earth doped aluminate nanocrystal capable of emitting near-infrared second region by ultrasonic excitation. The rare earth doped aluminate nanocrystal is prepared by adopting an amorphous complex high-temperature solid-phase thermal decomposition method, the reaction condition is controllable, the operation is simple, the repeatability is good, the used reagent is cheap and easy to obtain, the rare earth doped aluminate nanocrystal has the property of ultrasonic excitation near-infrared second-region luminescence, and the wavelength can be adjusted within 900-2500 nm.

This invention proposes a novel inert titanium anode and its preparation method, belonging to the field of electrochemical technology. The novel inert titanium anode of this invention comprises a titanium substrate and an anode coating. The anode coating is loaded on the surface of the titanium substrate and has a layered structure containing three metal oxides: an inner layer of ruthenium oxide, a middle layer of iridium oxide, and an outer layer of tin oxide. Ruthenium and iridium are deposited sequentially on the surface of the titanium substrate using an electrodeposition method. Then, a tin-containing solution is sprayed onto the surface using a spraying process. Finally, a layered coating containing ruthenium, iridium, and tin oxides is generated in situ on the surface of the titanium substrate using a thermal decomposition method, resulting in the novel inert titanium anode. The novel inert titanium anode prepared by this invention exhibits good electrochemical performance and a long lifespan.

This SiC composite has: a SiC single crystalline substrate having a diameter of at least 150 mm; and a graphene layer formed on the top surface of the SiC single crystalline substrate by a thermal decomposition method, wherein the graphene layer has a surface roughness Ra of 1.2 nm or less. Defects in the graphene layer may be 0.2 or less in terms of intensity ratio ID / G of a Raman spectrum, the SiC single crystalline substrate may be hexagonal 4H or 6H or cubic 3C, the off-angle of the top surface may be in a range of 0.5-10°, and the graphene layer may be composed of 0-2 layers of graphene.

The application provides a chain pyrolysis device with transverse flexible wires and a pyrolysis method, relates to the technical field of pyrolysis, and comprises a closed shell, a chain transmission mechanism, a flexible reaction net, a plurality of flexible scrapers and a baffle; the chain transmission mechanism comprises a pair of parallel horizontally placed flat annular plate chains and driving and supporting components thereof, is divided into a reaction zone, a separation zone and a driving zone; the flexible reaction net comprises a plurality of pairs of fin rods which are arranged at intervals on the two plate chains and a plurality of parallel flexible wires which are connected to the fin rods on the two sides respectively; one end of the flexible scraper is fixed to the inner surface of the closed shell above the separation zone and the other end can contact the flexible reaction net. The application can directly and efficiently pyrolyze large-size strip-shaped organic waste, so as to solve the technical problems that the existing pyrolysis device is prone to softening, caking and blocking of raw materials, serious coking and slagging and high pretreatment cost when processing strip-shaped organic waste.

The invention discloses a preparation process of a cover plate direct writing grid line. The preparation process comprises the following steps: S1, arranging a composite embedded line composed of a core layer and a peelable outer layer on the surface of a cover plate base material; s2, carrying out calibration and pattern compensation on the position of the pre-embedded line by adopting a laser positioning system; s3, depositing a metal conductive layer; s4, removing the outer layer of the pre-embedded wire in a thermal decomposition mode to separate the core layer from the metal layer; s5, laser finishing and forming; s6, annealing treatment is conducted on the grid lines, and transparent passivation layers are deposited on the surfaces of the grid lines; through the steps of pre-embedded line structure compounding, laser positioning calibration, metal deposition and selective removal, laser finishing, post-treatment and the like, high-precision, high-efficiency, low-cost and environment-friendly grid line preparation is realized; the problems of complex flow, high material waste, serious environmental pollution and insufficient silk-screen printing precision of the traditional photoetching etching process are effectively solved.

The invention discloses a photovoltaic module dissociation method based on a freezing-cementing dual force transfer mechanism. The method comprises the following steps: firstly, cutting a module into small blocks and immersing the small blocks into a special seepage system; the seepage system is an oil-in-water type emulsion composed of silica sol, grease, a functional additive and a water phase, the content of the silica sol is 10-30 wt%, and the content of the grease is 5-15 wt%. Then, the soaked assembly block is subjected to at least one time of freezing and thawing cycle treatment, and the cycle comprises the steps that the assembly is cooled to 80 DEG C below zero to 25 DEG C below zero, and heat preservation is conducted; and then rapidly raising the temperature to 40-80 DEG C at a speed of 30-50 DEG C / min for thermal shock, and expanding cracks by using thermal mismatch stress. And finally, obtaining complete glass, a battery piece, a back plate and an EVA (Ethylene Vinyl Acetate) adhesive film through mechanical separation. Efficient and low-temperature dissociation of the assembly is achieved through the physical synergistic effect, the dissociation rate exceeds 90%, the problems of high energy consumption of a traditional pyrolysis method, toxicity of an organic solvent method and low value of a mechanical method are effectively solved, and the method has the advantages of being environmentally friendly, high in material recovery value and simple and convenient in process.

In order to thermally decompose a thermosetting plastic-containing persistent composite plastic waste represented by carbon fiber pipes, GFRP, solar panels, printed circuit boards, and waste tires, the present invention comprises: A) a thermal decomposition step for adding, to a thermal decomposition tank, a thermosetting plastic-containing persistent composite plastic waste which is a raw material to be subjected to a thermal process, and at least 20 wt%, preferably at least an equal amount, of a hydrogen-rich hydrocarbon-based plastic which is represented by PP and PE and which serves as a reaction accelerator, with respect to 100 wt% of the raw material to be subjected to a thermal process, causing a liquid phase-solid phase reaction to occur by holding the same at the melting point of the reaction accelerator for one to two hours, and then thermally decomposing the same through a gas phase-solid phase decomposition reaction by increasing the temperature to a thermal decomposition temperature to generate a hydrogen radical or a hydrocarbon radical from the reaction accelerator; and B) a recovery step for cooling and recovering a thermal decomposition oil obtained through thermal decomposition in the thermal decomposition tank; and, if needed, C) a separation step for washing, separating, and recovering metals, inorganic substances, or reinforcing fibers remaining in the thermal decomposition tank by using a glycol-based solvent. Here, examples of the hydrogen-rich hydrocarbon-based plastic include random cleavage or decomposition-type plastics represented by PE (LDPE or HDPE) and PP, which each have a high Arrhenius factor.

The invention discloses a nano chromium oxyfluoride catalyst as well as a preparation method and application thereof, and the catalyst is prepared by taking a chromium source as a precursor, taking small molecular organic acid, a cationic surfactant and a nonionic surfactant as templates, adding a fluorine source and adopting a template agent guiding-solid phase thermal decomposition method. The preparation method comprises the following steps: grinding and mixing a chromium source precursor, a fluorine source and a template agent, reacting the mixture at 100-200 DEG C for 6-48 hours, centrifugally washing the reactant, drying, and sufficiently roasting the dried product in a muffle furnace to obtain the nano chromium oxyfluoride catalyst. The prepared nano chromium oxyfluoride catalyst has extremely high selectivity and stability when applied to a reaction for preparing fluorine-containing olefins (HFOs) through gas-phase HF removal of hydrofluoroalkanes (HFCs), the catalytic selectivity reaches up to 100% (the selectivity of a cis-product Z-HFO-1225ye reaches up to 98%), the catalytic conversion rate reaches 85% or above, and the nano chromium oxyfluoride catalyst has the advantages of being high in conversion rate, high in selectivity, good in stability and suitable for industrial production. The cost is low, and the operation is simple.

The application relates to the technical field of magnetic particle imaging, and more particularly to an iron oxide nanoparticle and application of the iron oxide nanoparticle in magnetic particle imaging. The nanoparticle is an octahedral superparamagnetic ferroferric oxide nanoparticle, the nanoparticle is synthesized by adding a surfactant and controlling a reaction rate through a high-temperature thermal decomposition method, the surfactant includes oleic acid and oleylamine, the octahedral superparamagnetic ferroferric oxide nanoparticle is coated with an amphiphilic polymer, the amphiphilic polymer includes polymaleic anhydride-1-octadecenoic acid and polystyrene maleic anhydride copolymer, and the outer layer of the amphiphilic polymer includes biological membranes such as macrophage membranes, red blood cell membranes, neutrophil membranes and tumor cell membranes according to biological application requirements. The surface of the octahedral magnetic particle is a crystal face, the crystal face has low spin disorder and low anisotropy, so that the octahedral magnetic particle has the advantages of low coercivity and high initial magnetic susceptibility, and thus becomes a high-sensitivity magnetic particle imaging tracer.

The invention relates to the technical field of supercapacitors, in particular to a preparation method of a ruthenium cathode plate for a supercapacitor, which combines a coating method and a thermal decomposition method, and obtains a ruthenium cathode plate product with strong coating adhesive force, low equivalent resistance and large specific capacity by blending an impregnation liquid, coating and drying a substrate for multiple times and then performing thermal decomposition treatment. The impregnation liquid is prepared from ruthenium-containing carbon powder, a ruthenium-containing compound and a solvent I according to a weight ratio of 1: (0.1-5): (1-20). Through technological process management and control and ruthenium powder preparation technology optimization, the high capacity is ensured, and meanwhile, the binding force of the RuO2 coating and the substrate is greatly improved.

The invention discloses rare earth permanent magnet powder with a TbCu7 structure and a preparation method of the rare earth permanent magnet powder. The rare earth permanent magnet powder with the TbCu7 structure comprises the following components: Sm < 1-a > Zr Fe < 9-y-z-r > Co < y > Ti < z > D < r > M < x >. The preparation method comprises the following steps: preparing a spherical composite oxide from soluble metal salt by using an ultrasonic spray pyrolysis method or a chemical coprecipitation method, then carrying out reduction treatment at a certain temperature, and finally controlling introduction of nitrogen or carbon elements into unit cells through high-temperature heating. In the prepared magnetic powder, the SmFe9 phase is used as the main phase, generation of the Sm2Fe17 impure phase of the Th2Zn17 type is effectively controlled, the morphology and the particle size of the obtained magnetic powder are controllable through process optimization, meanwhile, the rare earth loss is reduced, and important industrial value is achieved.

The invention discloses a preparation method of a high-stability titanium electrode, and relates to the technical field of titanium electrode preparation through a thermal decomposition method. The method comprises the following steps: S1, carrying out surface treatment on a titanium substrate; s2, preparing an iridium tantalum coating solution containing cysteine hydrochloride; and S3, uniformly coating a titanium substrate with the coating solution, sintering to form an active coating, and cooling to room temperature to obtain the coated titanium electrode. Compared with a traditional iridium tantalum system, the coating titanium electrode introduced with cysteine hydrochloride has the advantages that the coating structure can be optimized, and the coating stability can be improved. Cysteine hydrochloride has certain reducibility and can inhibit excessive oxidation of noble metal oxides to a certain extent, so that the coated titanium electrode with better stability and longer service life is obtained and is used for producing a copper foil anode.

The application relates to a preparation method of a composite hydrogen-induced color change film and relates to a preparation method of a color change film. In order to solve the problems of high cost and complex process of existing magnetron sputtering, plasma vapor deposition and other methods and equipment, sol and ZnO sol are prepared by adopting a sol-gel method; mixed sol is uniformly attached to the surface of a glass substrate by adopting a pulling and dipping method; and a composite hydrogen-induced color change film is prepared by adopting a thermal decomposition method and loading a catalyst. The application explores the optimal addition amount of ZnO and the optimal heat treatment temperature, and improves the response rate of the composite film to hydrogen. A catalyst loading method based on the thermal decomposition method is provided. The composite film has a fast response rate to hydrogen, good reversibility, obvious color difference before and after color change, can rapidly and accurately detect hydrogen leakage in the environment, and has a wide prospect in the field of hydrogen leakage detection. The application belongs to the technical field of hydrogen leakage detection.

The invention provides a rare earth doped Cs2NaErF6 at-CaF2 nanocrystalline luminescent material and a preparation method thereof, and belongs to the technical field of fluorescent nano materials. According to the invention, the core-shell structure nano material with Cs2NaErF6 as the core and CaF2 as the shell is successfully prepared for the first time. The method comprises the following steps: firstly, preparing a rare earth doped Cs2NaErF6 nanocrystal core by adopting a high-temperature coprecipitation method; then, calcium trifluoroacetate is used as a precursor, and a CaF2 shell layer grows on the surface of the precursor through a high-temperature thermal decomposition method; the technical problem that rare earth doped Cs2NaErF6 nanocrystals are difficult to coat is solved, the prepared core-shell material is uniform in morphology, good in dispersity and high in stability, the up-conversion luminescence intensity and the fluorescence lifetime of the core-shell material are remarkably improved compared with those of an uncoated core material, and the core-shell material has wide application prospects in the fields of biological imaging, display, anti-counterfeiting and the like.

This thermal decomposition method for a plastic comprises: a step for crushing a first plastic group including the plastic to obtain a crushed product; a step for causing a liquid substance to adhere to the crushed product; a step for mixing the crushed product to which the liquid substance is adhered and solid particles that promote thermal decomposition of the plastic, thereby obtaining a mixed product; and a step for thermally decomposing the plastic by charging the mixed product into a thermal decomposition container and heating the mixed product.

The present application relates to a kind of crystalline cobalt antimonate coating titanium electrode and its preparation method.The electrode active coating component is crystalline CoSb2O6, and Co and Sb element are uniformly distributed in active coating.The electrode is without noble metal such as Ru and Ir, and cost is far lower than classic TiO2-RuO2 coating titanium electrode.The electrode can achieve good chlorine evolution activity under low chloride ion concentration, and chlorine evolution activity is slightly lower than TiO2-RuO2 electrode, and service life is superior to TiO2-RuO2 electrode.In the field of on-site electrochemical treatment of wastewater, it has wide application prospect.The present application also provides the preparation method of cobalt antimonate coating titanium electrode, precursor solution is prepared by ethylene glycol-citric acid sol-gel method, electrode is coated by dip-coating plating film method, and finally electrode is prepared by thermal decomposition method.The present application is simple in process, low in cost, and suitable for large-scale production.

The invention relates to a core-shell structure rare earth nano light-emitting probe and a preparation method and application thereof.The light-emitting probe comprises an inner core and one or more shell layers wrapping the inner core, the inner core structure is AREF4, the shell layer structure is AREF4 or CaF2, A is selected from one or more of alkali metal, and RE is a rare earth element; the core-shell structure rare earth nano luminescent probe is synthesized by a thermal injection core high-temperature thermal decomposition method. Compared with the prior art, the method has the advantages that the dissolution and ion mixing of the inner core can be inhibited, the doped ion distribution of the core-shell nanoparticles is optimized, and the structural stability and the luminescence property of the nanoprobe are improved.