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135 results about "Selenium" patented technology

Selenium is a chemical element with the symbol Se and atomic number 34. It is a nonmetal (more rarely considered a metalloid) with properties that are intermediate between the elements above and below in the periodic table, sulfur and tellurium, and also has similarities to arsenic. It rarely occurs in its elemental state or as pure ore compounds in the Earth's crust. Selenium – from Ancient Greek σελήνη (selḗnē) "Moon" – was discovered in 1817 by Jöns Jacob Berzelius, who noted the similarity of the new element to the previously discovered tellurium (named for the Earth).

Sensor and sensor material for detecting pathogen-derived volatile organic compounds

A sensor comprising one or more metal oxides as sensor material is used to detect pathogen-derived VOCs, such as those released from an infected wound. The metal oxides can comprise one or more metal elements selected from aluminum, antimony, bismuth, boron, cerium, chromium, cobalt, copper, gold, indium, iridium, iron, lanthanum, lead, manganese, molybdenum, nickel, niobium, osmium, palladium, platinum, rhodium, ruthenium, selenium, silicon, silver, tantalum, tellurium, terbium, tin, titanium, tungsten, vanadium, ytterbium, yttrium, zinc, and zirconium. The sensor device can have one or more sensors that detect and record various VOCs indicative of the presence of pathogens, which are associated with mortality and / or infection.
Owner:タオ トレジャーズ エルエルシー ディービーエー ナノバイオファブ

Container for storing powder and selenium drum

The invention relates to the technical field of printing equipment, and provides a container for storing powder and a selenium drum, the container comprises: a housing, which is internally provided with a developer storage cavity; the developing roller is arranged on the shell, can rotate around a first axis and is used for conveying the developing agent in the developing agent storage cavity to the outside of the shell; the power transmission assembly comprises a first power receiving part and a transmission part linked with the first power receiving part, the first power receiving part is provided with a joint part capable of receiving first power, and the first power comes from a rotating component with a photosensitive material surface; the stirring component comprises a connecting part which is connected with the shell and can move relative to the shell; the stirring part is arranged in the developer storage cavity; and the second power receiving part is positioned on the power transmission path of the transmission part. The problem that in the prior art, operation of a stirring frame easily affects stable rotation of other components can be solved, and the imaging process is smoother.
Owner:珠海市颂洋科技有限公司

Method for cascade recovery of tellurium from complex tellurium-containing material

The invention discloses a method for cascade recovery of tellurium from a complex tellurium-containing material. The method comprises the steps of acid pickling, reduction neutralization, pyrogenic transformation, leaching and neutralization. According to the method, through cooperative treatment of a wet process and a pyrogenic process, the problem of slag phase wrapping is effectively solved, and tellurium with different valence states in a complex tellurium-containing material is converted into high-quality tellurium neutralization slag in a gradient mode. The selenium removal rate is not lower than 95%, the tellurium recovery rate reaches up to 90% or above, efficient separation of selenium and tellurium is achieved, and the produced tellurium dioxide neutralization slag can be used for further purification and refining.
Owner:JIANGXI COPPER

Preparation method of free-cutting lead brass alloy

According to the preparation method of the free-cutting lead brass alloy, trace elements such as tellurium, cobalt, samarium and selenium are added into lead brass, the tellurium, the selenium and the like can easily form low-melting-point compounds with other elements, grain growth can be inhibited, dispersed distribution of fine lead particles is promoted, stress concentration is reduced, and the cutting performance is improved; by adding cobalt, samarium and the like, grain refinement is facilitated, distribution and forms of selenium, tellurium and other elements are changed, alloy fluidity is promoted, dispersed distribution of lead and the like is promoted to be more uniform, the cutting performance is further improved, in addition, dissolution of lead can be inhibited through the passive film layer, the environment-friendly performance is improved, and harm caused by dissolution of lead is reduced.
Owner:NINGBO XINGAODA ADVANCED METALLIC MATERIALS

Carbon material and preparation method therefor and use thereof

PCT designated stage expiredWO2025091968A1Negative electrodesSecondary cellsPhysical chemistryIon beam
A carbon material and a preparation method therefor and a use thereof. The carbon material has pores, and the pore volume of micropores among the pores is greater than or equal to 0.05 cm3 / g. The carbon material contains a doping element, and the doping element includes at least one of nitrogen, phosphorus, arsenic, oxygen, sulfur, selenium, and tellurium. The internal doping concentration of the doping element in the carbon material is Q1 wt%, wherein Q1<8. The surface doping concentration of the doping element in the carbon material is Q2 wt%, wherein 10≤Q2≤25. Q1 wt% and Q2 wt% are obtained by means of the following test method: taking a sample of m1 g from the carbon material, wherein m1≥10; using a scanning electron microscope-energy dispersive spectrometer to test the sample to obtain Q2 wt%; and using a focused ion beam instrument to perform cross-section treatment on the sample, and using the scanning electron microscope-energy dispersive spectrometer to test the cross-section of the sample to obtain Q1 wt%.
Owner:SHENZHEN BTR SODIUM BATTERY NEW MATERIAL TECHNOLOGY CO LTD

Preparation method of platinum-doped hollow gold nanorod with high photo-thermal stability

The invention relates to a preparation method of a platinum-doped hollow gold nanorod with high photo-thermal stability. The invention belongs to the technical field of nano material preparation. The preparation method comprises the following steps: adding a tellurium precursor substance and a selenium precursor substance into a hydrazine hydrate-containing solution, continuously magnetically stirring, and diluting by using an aqueous solution of lauryl sodium sulfate after the reaction is completed, so as to obtain the tellurium-selenium nanorod; and dispersing the prepared tellurium-selenium nanorod in pure water, adding a gold precursor, a platinum precursor and a modifier at the same time, and then performing centrifugal separation to obtain the platinum-doped hollow gold nanorod. The thermal stability of the hollow gold nanorod is effectively improved through platinum doping, and when the platinum doping proportion is 10% or above, the light and heat stability of the hollow gold nanorod is obviously improved; the positive significance is realized on the full play of the effect of the material in photo-thermal therapy and related combined therapy application.
Owner:YANGTZE UNIVERSITY

Method for recovering valuable metals from copper anode slime step by step

The invention discloses a method for recovering valuable metals from copper anode slime step by step, and belongs to the technical field of metallurgy and chemical industry. According to the method, through control over the oxidation-reduction potential, the oxidation-reduction potential is high in the leaching stage, and it is guaranteed that gold, selenium, tellurium and the like can be oxidized to enter a leaching solution; in the reduction stage, gold, selenium and tellurium products are reduced step by step according to the difference of gold, selenium and tellurium in reduction potentials; in the leaching stage, soluble chlorine salt is added while enough oxidation potential is guaranteed, enough chloride ions are provided for the solution, and therefore gold can enter the solution in the form of AuCl4-(tetrachloroauric acid); meanwhile, in the oxidation leaching stage, a small amount of silver enters the solution in the form of silver sulfate or silver complex, and under the condition that enough chloride ions are provided, silver is precipitated and retained in residues in the form of silver chloride, so that separation of gold and silver is achieved, and meanwhile dispersion of gold and silver in the leaching process is reduced. According to the method, valuable metal is efficiently separated and recycled.
Owner:YUNNAN COPPER CO LTD

High-heat-resistance tellurium-copper alloy strip and preparation process thereof

The invention discloses a high-heat-resistance tellurium-copper alloy strip and a preparation process thereof, and relates to the technical field of tellurium-copper alloys. The method comprises the steps that 1, electrolytic copper, pure tellurium, pure selenium and a copper-cerium intermediate alloy are mixed, smelted and subjected to semi-continuous casting; obtaining a basic casting; and 2, the basic casting is sequentially subjected to homogenizing annealing, hot rolling, solution annealing, aging treatment, secondary rolling and stress relief annealing, and the high-heat-resistance tellurium-copper alloy strip is obtained. The high-heat-resistance tellurium-copper alloy strip comprises the following components: 0.1 wt%-0.5 wt% of tellurium, 0.01 wt%-0.03 wt% of cerium, 0.05 wt%-0.15 wt% of selenium, less than 0.3 wt% of impurities and the balance of copper. Through regulation and control of selenium and cerium, mechanical properties and high-temperature stability are synergistically improved; and through surface laser cladding of the enhancement layer, on the basis of ensuring the conductivity, the high temperature resistance is further improved, and reliable guarantee is provided for application of the alloy strip in a high-temperature complex environment.
Owner:TAIZHOU TAIJIN ALLOY MATERIAL CO LTD

Method for stepwise dissolving out copper, selenium and tellurium in copper anode slime and enriching precious metal

The invention discloses a method for stepwise dissolution of copper, selenium and tellurium in copper anode slime and enrichment of precious metals, the method comprises the steps of ball milling and drying, pressure leaching, oxygen pressure conversion and alkaline leaching, in the pressure leaching process, the oxygen partial pressure in a sulfuric acid solution with the concentration of 10-30 g / L is controlled to be 0.05-0.2 MPa at the temperature of 100-120 DEG C, NaCl and HCl are added in the oxygen pressure conversion to improve the Se recovery rate, and the alkaline leaching is carried out at the temperature of 100-120 DEG C; na2S is added in alkaline leaching, so that the tellurium recovery rate is remarkably improved, and the copper-selenium-tellurium leaching efficiency is high.
Owner:INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI

Purification method of high-purity tellurium

The invention discloses a purification method of high-purity tellurium, and belongs to the technical field of non-ferrous metallurgy. The method sequentially comprises the steps of raw material ultrasonic mechanical activation, ultrasonic selective recrystallization, smelting reduction refining, vacuum rectification purification and tellurium ingot forming, and volatile impurities such as selenium and sulfur are effectively removed by oxidizing calcination of a crude tellurium raw material; then, primary separation of impurities is realized in a manner of combining alkaline dissolution and oxidation precipitation, and then repeated purification is performed through low-temperature crystallization, so that the purity of tellurium is remarkably improved; metal impurities are further removed through smelting reduction treatment under the inert atmosphere, and preliminarily purified tellurium ingots are formed; step distillation separation is carried out by utilizing vapor pressure difference between tellurium and impurities under a high vacuum condition, and a pure tellurium component is enriched; and finally, melting in an inert atmosphere, cooling and forming to obtain the high-purity tellurium ingot. The method is stable in technological process, suitable for industrial application and capable of meeting the requirements of high-end fields such as semiconductors and photoelectric materials for high-purity tellurium materials.
Owner:YUNNAN COPPER CO LTD

A method for separating selenium and tellurium from high selenium tellurium dioxide by multi-stage conversion

The application provides a method for separating selenium tellurium from high-selenium tellurium dioxide through multistage conversion, and belongs to the technical field of non-ferrous metallurgy. The method comprises the following steps: a, material preparation; b, primary conversion leaching: selectively reducing selenium in a solution containing a reducing agent at pH 8-11 to obtain a selenium tellurium-containing residue and a primary leaching solution; c, secondary conversion leaching: selectively leaching tellurium in a strong alkaline solution containing a reducing agent to obtain elemental selenium and a secondary leaching solution; and d, neutralization treatment: combining the two leaching solutions and adding acid to obtain high-purity tellurium dioxide. The method is simple to operate, short in production cycle, and realizes efficient separation of selenium tellurium. The purity of the obtained elemental selenium is greater than or equal to 95%, the purity of the obtained tellurium dioxide meets the requirements of electrodeposition for producing 4N tellurium, and the method is suitable for large-scale production.
Owner:KUNMING UNIV OF SCI & TECH +1

Selenium content detection device with filtering function

The utility model relates to a selenium content detection device with a filtering function, and belongs to the technical field of detection devices. Comprising a base, a selenium ion tester is slidably connected to the base, a support is fixedly connected to one end of the base, a filtering barrel is fixedly connected to the upper end of the support, and a filtering mechanism is rotatably connected to one side, located on the filtering mechanism, of the support. The filter mechanism is rotatably arranged on one side of the filter barrel, so that the filter screen I and the filter screen II can be conveniently rotated out of the filter barrel to be cleaned and replaced, and the influence on the filtering effect and the follow-up detection accuracy of the selenium content due to impurity deposition on the filter screens after repeated use is effectively avoided.
Owner:BOLUO COUNTY AGRI PROD QUALITY SAFETY SUPERVISION & TESTING CENT

Method for recovering selenium and tellurium from copper anode slime copper separation liquid step by step

The invention relates to a method for recycling selenium and tellurium from copper anode slime copper separation liquid step by step, and aims to solve the technical problems that pyrogenic separation is needed after selenium and tellurium are extracted, and the treatment process flow is long. According to the technical scheme, the method comprises the following steps: (1) heating, concentrating, cooling and filtering the copper anode slime copper separation liquid; (2) detecting the content of selenium and tellurium; (3) carrying out sodium hydrogen sulfite reduction on filtrate I to extract selenium; (4) chlorinating filtrate II and then reducing to obtain crude tellurium; after the copper separation liquid is treated step by step, step-by-step recovery of selenium and tellurium in the copper separation liquid is achieved through a one-step method, the recovery process of selenium and tellurium is shortened, the recovery rate of selenium and tellurium in the copper anode slime is increased, and the economic benefits of smelting plants are improved.
Owner:NORTHERN COPPER CO LTD

A comprehensive treatment method of platinum-palladium slag

The application discloses a comprehensive treatment method of platinum-palladium slag and relates to the technical field of nonferrous metal smelting. After sulfuric acid roasting of the platinum-palladium slag, flue gas is introduced into a selenium absorption tower; the roasted slag is hydrolyzed, and tellurium is recovered by reduction of a dissolved solution; after the tellurium is precipitated, the dissolved solution is introduced into a copper recovery procedure; gold is recovered by chlorination and dissolution in the dissolved slag, and the gold-recovered slag is introduced into silver recovery; gold powder is obtained by reduction of the gold-recovered solution; platinum and palladium are precipitated from the gold-reduced solution; ammonia is added to the platinum and palladium precipitate to separate platinum and palladium; the separated platinum and palladium is refined to recover platinum and palladium; platinum and palladium are reduced from the platinum and palladium precipitated solution to obtain platinum and palladium precipitate and platinum and palladium reduced solution, and the platinum and palladium precipitate is returned to the roasting procedure; tellurium is reduced from the platinum and palladium reduced solution to obtain tellurium powder and tellurium reduced solution, and the tellurium reduced solution is introduced into a wastewater treatment procedure. The application has the beneficial effects that selenium and tellurium, copper, gold, silver, platinum and palladium are stepwise separated and recovered, the recovery rate is high, the wastewater treatment difficulty is small, and environmental pollution is reduced.
Owner:JIANGXI COPPER GUOXING (YANTAI) COPPER CO LTD +1

Silver impurity series quality control sample and preparation method thereof

The invention provides a silver impurity series quality control sample and a preparation method thereof, and belongs to the field of chemical quality control sample preparation.The preparation method comprises the steps that a first group of metal is wrapped with a silver sheet and embedded into silver powder, after heating melting is conducted in a vacuum environment, a second group of metal is added for melting and casting, and a first impurity sample is obtained; and repeating the melting and casting process twice to respectively obtain a second impurity sample and a third impurity sample, and performing sheet rolling treatment to obtain the quality control sample of the series of impurities in silver. The high-content impurity element sample is prepared by means of step-by-step smelting, quenching and the like and is diluted as a raw material, so that the low-content impurity elements are uniformly and stably molten into silver, the controllable degree of the content of the impurity elements is improved, and the uniformity and reliability of the prepared quality control sample are ensured. The impurity-in-silver quality control sample provided by the invention contains 10 elements including gold, bismuth, copper, iron, lead, palladium, antimony, selenium, tellurium and zinc in addition to the main element silver, and can meet the quality control requirements of the whole process of high-silver alloy detection.
Owner:CHANGCHUN GOLD RES INST

A tellurium-selenium-zinc plane target material and a preparation method thereof

The application discloses a tellurium-selenium-zinc plane target material and a preparation method thereof, and belongs to the technical field of target material processing. The method is characterized in that zinc selenide powder is used to dope zinc telluride powder to prepare a tellurium-zinc-selenium target material, so that the target material can be regulated to a normal temperature band gap of 2.15-2.82 eV, and the material has higher light transmittance than zinc telluride. On the other hand, in order to guarantee the uniformity, compactness and mechanical strength of the target material, the preparation method adopts a double-stage heating and pressurizing method to heat and prepare the powder, so that the prepared tellurium-zinc-selenium plane target material has a relative density of more than 96%, high bending strength and good uniformity.
Owner:XIANDAO THIN FILM MATERIALS GUANGDONG CO LTD

A MXene two-dimensional material and its preparation method and use

The present invention discloses a MXene two-dimensional material and a preparation method and application thereof, wherein the chemical formula of the MXene two-dimensional material is expressed as M n+1 (X a Y 1‑a ) n , where M is selected from a transition metal element, X is selected from one or more of carbon, nitrogen, and boron, and Y is selected from one or more of phosphorus, oxygen, sulfur, selenium, or tellurium; 0<a<1, and n is between 1 and 4. The preparation method of this two-dimensional MXene material comprises reacting a MXene material containing a halogen element functional group with a single element, hydride, or metal salt of phosphorus, oxygen, sulfur, selenium, or tellurium. This invention produces a novel MXene material that achieves the doping of non-metallic elements at the X position, providing a new approach to multi-element manipulation of MXene materials.
Owner:BEIHANG UNIV

Ultrasonic treatment method of high-impurity copper anode slime

The application relates to an ultrasonic treatment method of high-impurity copper anode slime. The ultrasonic treatment method is realized through hierarchical ultrasonic strengthening and synergistic leaching. In the first-stage leaching, hydrogen peroxide-oxygen-rich air composite oxidants are combined with ultrasonic cavitation effects to realize efficient oxidation leaching of arsenic, antimony and bismuth; in the second-stage leaching, sulfuric acid-sodium sulfite mixed leaching agents are used to remove harmful impurities such as arsenic, antimony and bismuth under ultrasonic strengthening, and to efficiently enrich valuable metals such as gold, silver, selenium and tellurium, so that the treatment period is shortened, energy consumption and reagent consumption are reduced, resource comprehensive utilization is improved, and the method is suitable for efficient separation and resource recovery of high-impurity copper anode slime containing refractory impurities such as arsenic, antimony and bismuth and valuable metals such as gold, silver, selenium and tellurium.
Owner:CHUXIONG DIANZHONG NON FERROUS METALS LLC

A method for preparing high-density one-dimensional selenium-doped copper telluride chains

This invention relates to a method for preparing high-density one-dimensional selenium-doped copper telluride chains, belonging to the field of nanomaterials technology. The method involves preparing a copper single-crystal substrate; evaporating and depositing tellurium powder onto the copper single-crystal substrate to obtain the substrate and a copper tellurium compound deposited on the substrate, controlling the temperature of the copper tellurium compound and the copper single-crystal substrate at 25–30°C during the deposition process; subjecting the substrate and the deposited copper tellurium compound to a first heating and holding treatment at the growth temperature; then evaporating and depositing selenium powder onto the substrate and the copper tellurium deposit to obtain a selenium-doped copper telluride deposit and the substrate, controlling the temperature of the substrate and the deposit at 25–30°C during the deposition process; and subjecting the obtained selenium-doped copper telluride deposit and the substrate to a second heating and holding treatment at the growth temperature to obtain high-density one-dimensional selenium-doped copper telluride chains. The one-dimensional selenium-doped copper telluride chains prepared by this invention have a width of less than 1 nanometer, a length of more than 50 nanometers, and all chains are uniformly oriented.
Owner:KUNMING UNIV OF SCI & TECH

Method of Forming Bismuth Chalcogenide Film, Terahertz Detector Having Such a Film and Method of Forming Such a Detector

A method of forming a bismuth chalcogenide film is disclosed including the steps of (a) forming at least one bismuth (Bi) elemental layer on a substrate, (b) forming at least one selenium (Se) or tellurium (Te) elemental layer on the substrate, and (c) after steps (a) and (b), heating the substrate to form a bismuth chalcogenide film.
Owner:CITY UNIVERSITY OF HONG KONG

Synthesis method of selenium and sulfide infrared optical crystal

The invention discloses a synthesis method of a selenium and sulfide infrared optical crystal, which comprises the following steps: weighing elementary substance raw materials of each element according to the stoichiometric ratio of the selenium and sulfide infrared optical crystal, additionally weighing elementary substance selenium or elementary substance sulfur with the molar ratio of 2-5%, and then filling each elementary substance raw material into a crucible; vacuumizing the crucible filled with the simple substance raw material, and sealing by using oxyhydrogen flame; putting the sealed crucible into another quartz crucible, vacuumizing, and sealing by adopting oxyhydrogen flame; putting the double-layer crucible into a double-temperature-zone tubular furnace, then respectively heating a high-temperature zone and a low-temperature zone of the double-temperature-zone tubular furnace, and after the low-temperature zone is heated to a reaction temperature in a gradient manner, keeping the temperature for 5-10 hours; then mechanically oscillating the double-temperature-zone tubular furnace for 3-5 times, and then keeping the temperature for 5-10 hours; after the reaction is finished, carrying out temperature oscillation for 2-3 times; and finally, cooling the double-temperature-zone tubular furnace to room temperature. Cracking and explosion of the crucible can be effectively avoided, deviation of the stoichiometric ratio can be effectively prevented, and the high-purity polycrystal material is obtained.
Owner:YANGTZE NORMAL UNIVERSITY

Estimation method of granite-type uranium ore-forming temperature based on arsenic and selenium content of pyrite

The application provides a method for estimating the temperature of the formation of a granite type uranium deposit based on the content of arsenic and selenium in pyrite, which comprises the following steps: firstly, collecting ore samples of the uranium deposit through field geological investigation; then, observing the ore samples under a microscope and analyzing the elements in the laboratory after processing the ore samples; and finally, processing the laboratory data and comprehensively estimating the temperature of the formation of the uranium deposit. The application has reasonable design and simple process, and is simple to operate and has low technical difficulty in estimating the temperature of the formation of the granite type uranium deposit, which is of great significance for deeply understanding the cause of the uranium deposit and predicting the prospect of the formation of the uranium deposit in the deep part.
Owner:BEIJING RES INST OF URANIUM GEOLOGY

Constant-temperature reaction bath for selenium element extraction

The utility model relates to the field of selenium extraction equipment, in particular to a constant-temperature reaction bath for selenium extraction, which comprises a rack, a bath arranged on the upper end face of the rack, an electric heating component arranged on the inner wall of the bath, a temperature control component arranged in the rack and connected with the electric heating component, and two heat preservation cover plates rotatably hinged to the inner wall of the bath. A lifting frame is arranged on the rack and vertically corresponds to the bath, and a limiting net plate is arranged at the upper end of the lifting frame in a sliding mode. In the process of placing raw materials, the heat preservation cover plate is used for preserving heat of water, so that the loss of temperature is reduced, and the extraction effect of the selenium element is improved.
Owner:HENAN XIBAIKANG HEALTH IND CO LTD

A method for graded extraction of copper anode slime from co-smelting

This invention discloses a method for the tiered extraction of copper anode slime from co-smelting copper anodes, belonging to the fields of resource comprehensive utilization and non-ferrous metal metallurgy. The method is used to treat copper anode slime produced after co-smelting waste circuit board pyrolysis residue and copper sulfide ore, followed by blowing and electrolytic refining. The method includes: sulfidation leaching of the copper anode slime to preferentially allow tellurium to enter the leachate; reduction precipitation of the tellurium-containing leachate to recover tellurium products; atmospheric pressure mixed acid leaching of the sulfidation leaching residue to preferentially allow copper and selenium to enter the leachate, yielding a copper-selenium-containing leachate and a precious metal-enriched slag; chlorination leaching of the precious metal-enriched slag to allow gold to enter the chlorinated leachate and separate from silver; and SO2 reduction precipitation and extraction separation of the copper-selenium-containing leachate to sequentially recover selenium and copper. This method can achieve tiered separation and efficient recovery of Te, Se, Au, Ag, and Cu from novel copper anode slime produced by co-smelting, and has the advantages of a clear process, good selectivity, and suitability for closed-loop operation.
Owner:YINGTAN SHENGFA COPPER

Selenium-modified nickel-vanadium layered double hydroxide electrode material for supercapacitor and preparation and application thereof

The invention discloses a selenium-modified nickel-vanadium layered double hydroxide electrode material for a supercapacitor and preparation and application thereof, and belongs to the technical field of supercapacitors. The material initiates an'intercalation pre-modification-selenylation cooperation 'structure regulation strategy, and is realized through a two-step hydrothermal method: firstly, in-situ intercalation of graphene quantum dots is carried out in a NiV-LDHs hydrothermal growth stage to serve as an interlayer support and an initial conductive network, hexamethylenetetramine is used for assisting formation of a layered precursor, a double-reducing-agent system is used for synergistic in-situ selenylation, and the graphene quantum dot / NiV-LDHs composite material is obtained. Se < 4 + > is adsorbed and anchored by using pi-pi of the GQDs, so that double-site uniform distribution of selenium on the surface of the laminate and the interface of the GQDs is realized. According to the method, the limitation of a traditional step-by-step process is broken through, the integrity of a layered structure, the continuity of a conductive network and the uniformity of selenium modification are synergistically guaranteed, the interlayer spacing of the obtained material is increased to 1.22 nm, active sites are fully exposed, and the material has high specific capacitance and high rate performance and is suitable for a high-performance supercapacitor electrode.
Owner:XIAN THERMAL POWER RES INST CO LTD +1

Platinum-based hollow nanorods with ultrathin wall thickness, and preparation method and application thereof

The application belongs to the field of nanometer materials, and specifically discloses an ultrathin platinum-based hollow nanorod with a wall thickness less than 4 nm, a preparation method and application thereof. The preparation method comprises the following steps: adding tellurium and selenium precursors into a solution containing a reducing agent and continuously stirring by magnetic force, then performing solid-liquid separation to obtain tellurium-selenium nanorods; obtaining a structure of a platinum alloy coated tellurium-selenium template, then adding hydrogen peroxide solution into an aqueous solution containing an intermediate product and reacting for a preset time, performing solid-liquid separation to obtain a precipitate after the reaction is completed, and finally obtaining the ultrathin platinum alloy hollow nanorod. If no other noble metal precursor is added when the platinum precursor is added, the ultrathin platinum hollow nanorod can be obtained. The application mainly controls the reaction rate of the noble metal precursor and the tellurium-selenium template by using ethylene glycol and polyvinylpyrrolidone, and removes the unreacted tellurium-selenium template by using hydrogen peroxide etching, so that the prepared ultrathin platinum-based hollow nanorod has a wall thickness less than 4 nm.
Owner:YANGTZE UNIVERSITY

A ternary layered selenide Ge 0.85 Bi 2.15+x Se4 semiconductor material and a method of preparing the same

This invention relates to the field of crystal material preparation technology, specifically to a ternary layered selenide Ge 0.85 Bi 2.15+x Se4 semiconductor material and its preparation method. The preparation method includes the following steps: according to the chemical formula Ge... 0.85 Bi 2.15+x The molar ratio of germanium powder, bismuth powder, and selenium powder in Se4 is weighed, where 0 ≤ x ≤ 0.06. The weighed raw materials are mixed evenly and placed in a quartz tube. The quartz tube is then sealed under vacuum. The vacuum-sealed quartz tube is placed in a heating furnace and heated from room temperature to 900-950℃, held at this temperature for 12-24 hours. After the holding period, the quartz tube is removed from the heating furnace and quenched. The quenched and cooled quartz tube is then placed back in the heating furnace and heated from room temperature to 540-560℃, held at this temperature for 3-5 days for annealing, thus obtaining the ternary layered selenide Ge. 0.85 Bi 2.15+x Se4 semiconductor material. This invention successfully solves the technical problem of obtaining a single phase in the GeBi2Se4 system by precisely controlling the Ge / Bi ratio and employing high-temperature quenching and low-temperature long-time annealing processes.
Owner:JIHUA LAB

High-heat-resistant tellurium-copper alloy strip and preparation process thereof

The application discloses a high-heat-resistance tellurium-copper alloy strip and a preparation process thereof, and relates to the technical field of tellurium-copper alloys. Step 1: electrolytic copper, pure tellurium, pure selenium and copper-cerium intermediate alloy are mixed, smelted and semi-continuously cast to obtain a base casting; step 2: the base casting is sequentially subjected to homogenization annealing, hot rolling, solid solution annealing, aging treatment, two-rolling and stress relief annealing to obtain the high-heat-resistance tellurium-copper alloy strip. The high-heat-resistance tellurium-copper alloy strip comprises the following components: 0.1wt%-0.5wt% of tellurium, 0.01wt%-0.03wt% of cerium, 0.05wt%-0.15wt% of selenium, impurity content <0.3wt% and the rest of copper. In the application, the mechanical properties and high-temperature stability are synergistically improved by regulating and controlling selenium and cerium; and the high-temperature resistance is further improved on the basis of ensuring the electric conductivity through a surface laser cladding enhancement layer, thereby providing reliable guarantee for the application of the alloy strip in a high-temperature complex environment.
Owner:TAIZHOU TAIJIN ALLOY MATERIAL CO LTD