39 results about "Rhenium sulfide" patented technology

The invention relates to a selenium rhenium sulfide composite two-dimensional material and a preparation method and application thereof; the preparation method comprises the steps of (a) dissolving ammonium perrhenate and thiourea in an organic solvent to form a first solution; (b) dissolving selenium powder in hydrazine hydrate to obtain a second solution; (c) mixing the first solution and the second solution, and pouring the mixture in a reactor with a substrate to carry out hydrothermal reaction; after the hydrothermal reaction, cooling, and taking out the substrate. By controlling minor doping of sulfur, a selenium rhenium sulfide nanosheet with high coverage, good distribution uniformity and small size is obtained on the substrate, the size of the nanosheet reaches 50-100 nm; the nanosheet with high coverage and vertical growth can provide larger specific surface area, and greater current density is provided in electric catalysis. By adjusting doping quantity of sulfur, the electronic structure of the material is adjusted, hydrogen absorption free energy of the material is lowered, conductivity of the material is improved, more defects and active sites are created, and the electrocatalytic performance of the material is improved.

The invention discloses a preparation method and application of a rhenium disulfide nanoflake. A single-layer and/or few-layer disulfide nanoflake is prepared by mixing a rhenium source with xanthateand carrying out hydrothermal reaction. The method is characterized in that the large-scale commercially-produced xanthate is selected as a sulfur source; the method has good repeatability and low cost, and can be used for preparing the single-layer and/or few-layer disulfide nanoflake. The nanoflake can be applied to the fields of adsorption, photocatalysis, photodegradation, lubrication, photoelectronic devices and the like.

The invention discloses a rhenium disulfide nanosheet array film adsorption sensor and a preparation method thereof. The sensor comprises an electrode base and a sensitive material. The electrode base is composed of a gold electrode and a ceramic insulating sheet substrate, wherein the gold electrode is an interdigital electrode structure. The sensitive material is a rhenium disulfide nanosheet array film, and is synthesized by chemical vapor deposition method. Through design of the synthetic strategy, the rhenium disulfide nanosheet array film in an orientation perpendicular to the electrode base can be deposited on the electrode base so as to compose the adsorption sensor. The sensor has the characteristics of simple structure, small size, low preparation cost and simple synthesis. Because of the vertical orientation of the nanosheet, more gas molecules can be adsorbed on the surface, thus being beneficial to diffusion of molecules. Therefore, compared with the existing sensors, the sensor provided by the invention has the advantages of high sensitivity, short response recovery time and good accuracy, and is very suitable for popularization and application.

The invention discloses preparation of rhenium sulfide and a cadmium sulfide/rhenium sulfide composite material. A two-dimensional monolayer rhenium disulfide is grown on a mica sheet substrate through an ordinary pressure chemical vapor deposition method with sulfur powder as a sulfur source and rhenium trioxide as a rhenium source under protection of an inert gas and a water-assisting precondition; by means of a secondary growth method, cadmium sulfide particles are again deposited on the mica sheet substrate with the two-dimensional monolayer rhenium disulfide, and a CdS/ReS2 composite material with the cadmium sulfide particles growing on the surface of the rhenium sulfide is obtained. The preparation of the rhenium sulfide and the cadmium sulfide/ rhenium sulfide composite material have the advantages that the process is simple, low-cost, rapid, highly efficient and controllable, and the high-quality single-layer rhenium sulfide is prepared. The CdS/ReS2 composite material obtained by depositing the cadmium sulfide on the two-dimensional material rhenium sulfide has more excellent photoelectric properties and has a high response rate while being applied to a photoelectric device.

The invention discloses a preparing method of nanometer grade rhenium sulfide colloid particle, which comprises the following steps: mixing tall-rhenate with hyposulfite evenly in multi-alcohol solvent; adding into perchloric acid or alcaine; reacting under normal temperature; preparing rhenium sulfide colloid; adjusting acidity of colloid; getting nanometer grade small size rhenium sulfide colloid particle with stable particle. This invention does not need add into protective agent and heat, which can be used to diagnose and cure tumor in medical domain.

The invention discloses a method for synthesizing a hollow metal 1T phase structure rhenium sulfide supercapacitor electrode material by a hydrothermal synthesis method, and belongs to the field of new energy technology. The supercapacitor electrode material of the invention has large specific capacitance, high electrochemical stability, a long cycle life and good electrochemical performance. Theworking electrode is easy to prepare, efficient in energy and friendly to environment, and has a broad industrial application prospect.

Provided is a method that enables high-purity perrhenic acid to be produced from crude rhenium sulfide using a dry process. This method for producing an aqueous solution of perrhenic acid includes: 1) a step in which roasting is performed on rhenium sulfide in the presence of an oxygen-containing gas, and gasified rhenium oxide is collected; 2) a step in which the rhenium oxide is cooled and solidified, while keeping sulfur oxides associated with the gasified rhenium oxide in a gaseous state, and then the purity of the rhenium oxide is increased by performing solid-gas separation; and 3) a step in which an aqueous solution of perrhenic acid is obtained by dissolving the solidified rhenium oxide in water, or by dissolving the solidified rhenium oxide in water after heating and gasifying the solidified rhenium oxide.

The invention discloses a composite catalyst, a preparation method and application thereof. The composite catalyst comprises an MXene substrate, rhenium disulfide nanosheets loaded on the surface of the MXene substrate and doped with nonmetal atoms, and platinum monoatoms loaded on the rhenium disulfide nanosheets doped with the nonmetal atoms. According to the invention,the loaded platinum single atoms can realize high atom utilization efficiency, greatly reduce the use amount of platinum and save the cost; the rhenium disulfide nanosheet has a large surface area and can contain more platinum atoms, and by conducting non-metal atom doping on the rhenium disulfide nanosheet,the number of active sites of the rhenium disulfide nanosheet can be increased, and the conductivity and the proton capturing capacity of the rhenium disulfide nanosheet are improved; the MXene material is introduced, so that the number of active sites of the rhenium disulfide nanosheet is increased, and the conductivity of the rhenium disulfide nanosheet is improved; and the MXene substrate and the rhenium disulfide nanosheet loaded on the surface of the MXene substrate and doped with nonmetal atoms are integrally used as a platinum monatomic carrier to realize loading of platinum monatomic, so that the composite catalyst has excellent electro-catalytic performance.

The invention discloses a preparation method of rhenium disulfide or rhenium diselenide crystals. The method comprises the following steps of: ultrasonically and uniformly mixing rhenium powder, sulfur powder or selenium powder and an iodine transport agent, sealing a port with propane or oxyhydrogen flame, preheating in a double-temperature-zone tube furnace, carrying out formal reaction after the temperature of a source zone rises, slowly cooling after growth is completed, and naturally cooling to obtain rhenium disulfide or rhenium diselenide crystals. According to the method, a chemical vapor transport method is utilized, a closed system is adopted, reaction conditions are controllable, synthesis is stable, repeatability is high, and high-quality layered material blocky crystals can beprovided for mechanical stripping.

The invention belongs to the technical field of preparation of photocatalytic materials, and discloses a preparation method and application of a rhenium disulfide nano sheet. ReO3 is used as a rheniumsource, sulfur powder is used as a sulfur source, and the rhenium disulfide nano sheet is prepared on a substrate by adopting a chemical vapor deposition method. The method is simple to operate and low in growth temperature; the prepared rhenium disulfide nano sheet is good in crystallinity, stable in physicochemical property and abundant in active sites, and excellent photocatalytic efficiency can be obtained. The prepared rhenium disulfide nano sheet has the characteristic of spontaneous vertical growth, compared with other planar nano materials, the morphology can expose a large number ofedge positions so as to obtain higher-density catalytic active sites and a larger infiltration area, and thus the nano sheet has very high photocatalytic sterilization efficiency.

The invention provides a preparation method of the rhenium sulfide nanotube. The preparation method comprises the following steps: mixing a rhenium precursor and a sulfur precursor in deionized waterto obtain a first mixture solution; adding aqueous phase colloid of tellurium nanowires into the mixture solution to obtain a mixed suspension; sealing the mixed suspension, carrying out treatment ina high-temperature environment, cooling to room temperature, and collecting to obtain black powder; and cleaning and drying black powder to obtain rhenium sulfide nanotube. The rhenium sulfide nanotube provided by the invention has the advantages of simple preparation process and lower cost, and is suitable for large-scale industrial production.

The invention belongs to the field of photoelectric detector preparation, and particularly relates to a synthesis method of two-dimensional rhenium sulfide and an application thereof in the field of photoelectric detector preparation. The invention provides a synthesis method of two-dimensional ReS2, which comprises the steps of placing a precursor material on a substrate, heating the precursor material in an atmosphere of an inert gas and a reducing gas, and carrying out cooling to room temperature after heating, and carrying out purifying to obtain a product, wherein the precursor material comprises ReO3 and S. The invention also provides an application of the two-dimensional ReS2 prepared by the synthesis method in the field of photoelectric detector preparation. According to the invention, the raw materials are simple and easy to obtain, the cost is low, and the purity of the product can reach 99%. Through detection, the prepared product has good photosensitivity, stability and rapid switching performance. The technical problem that there is no method for efficiently, easily and conveniently synthesizing high-quality rhenium disulfide in the prior art is solved.

Provided is a method that enables high-purity perrhenic acid to be produced from crude rhenium sulfide using a dry process. This method for producing an aqueous solution of perrhenic acid includes: 1) a step in which a first roasting is performed on rhenium sulfide in the presence of an oxygen-containing gas, generating rhenium oxide and sulfur oxide, and then gasifying and discharging the sulfur oxide to obtain rhenium oxide as a roasting residue; 2) a step in which a second roasting is performed on the roasting residue in the presence of an oxygen-containing gas, and gasified rhenium oxide is collected; 3) a step in which the gasified rhenium oxide is solidified by cooling, or a step in which an aqueous solution of perrhenic acid is obtained by dissolving the gasified rhenium oxide in water while cooling the gasified rhenium oxide; and 4) and a step in which, if the rhenium oxide was solidified, an aqueous solution of perrhenic acid is obtained either by dissolving the solidified rhenium oxide in water, or by dissolving the solidified rhenium oxide in water after heating and gasifying the solidified rhenium oxide.

The invention discloses a preparation method of a multi-mode rhenium disulfide diagnosis and treatment agent, which comprises the following steps: respectively putting liquid bromine, rhenium and sulfur into a quartz tube, and heating to obtain blocky single crystal ReS2; the preparation method comprises the following steps: grinding blocky single crystal ReS2 into powder, and mixing the powder with a nitric acid solution to form a mixed solution; the mixed solution is stirred and then centrifuged, a sample is cleaned, and a ReS2 micron layer with magnetism is obtained; dispersing the obtained ReS2 micron layer into a mixed solution of N-methyl pyrrolidone and ethanol, centrifuging and cleaning to obtain a ReS2 nano layer; the obtained ReS2 nano layer and an mPEG-NH2 solution are mixed, stirred and dried, and the mPEG-NH2 modified ReS2 nano layer is obtained. The diagnosis and treatment agent obtained by the invention not only improves the definition and sensitivity of human soft tissue imaging, but also has good photo-thermal and magnetothermal characteristics, also improves the biocompatibility with human tissues, prolongs the in-vivo half-life period, and reduces the immunogenicity.

The invention discloses a method for judging the sub-domain and lattice direction of a rhenium compound film based on an optical method, and belongs to the technical field of two-dimensional nano material characterization. The method comprises the following steps: placing a rhenium-family compound film sample on an objective table of an optical microscope containing polarized light, rotating the position of the rhenium-family compound film sample, photographing the rotated sample, and judging all sub-domains and crystal boundaries of the rhenium-family compound film sample; rGB contrast extraction is carried out on a photo obtained through photographing, and the lattice orientation of each sub-domain is obtained. The method disclosed by the invention is relatively low in equipment condition requirement and simple in operation process, and is a lossless, rapid and convenient method for distinguishing and judging the rhenium sulfide crystal boundary and identifying the lattice orientation of each sub-domain.

The invention discloses a two-dimensional rhenium sulfide photoelectric detector and a preparation method, the two-dimensional rhenium sulfide photoelectric detector at least comprises a substrate layer and an insulating layer formed on the substrate layer, a two-dimensional rhenium sulfide layer is arranged on the insulating layer, and electrodes connected with the two-dimensional rhenium sulfide layer are arranged as a source electrode and a drain electrode. And a tetracyanodimethyl p-benzoquinone layer is formed on the two-dimensional rhenium sulfide layer through doping. ReS2 is subjected to surface modification through macromolecule F4-TCNQ to regulate and control the performance of the ReS2, and the ReS2 photoelectric detector with multiple performance combinations is obtained and comprises a high-responsivity and high-sensitivity ReS2 photoelectric detector.