1488 results about "Sulfide" patented technology

The invention belongs to the field of photocatalytic materials, and particularly relates to a high-entropy sulfide and a preparation method and application thereof. The high-entropy sulfide is granular, the molecular general formula is (MnaFebCocCudZe) xS, x is equal to 1, and the atomic ratio of Mn to Fe to Co to Cu to Zn is a: b: c: d: e of (1-2): (1-2): (1-2): (1-2): (1-2): (1-2): (1-2). The preparation method comprises the following steps: S1, dissolving metal salt in a mixed solvent of isopropanol and glycerol according to the atomic ratio of metal elements, and carrying out solvothermal reaction to obtain a precursor; and S2, dispersing the precursor in ethanol, adding thioacetamide as a sulfur source, and carrying out solvothermal reaction to obtain the high-entropy sulfide. The high-entropy sulfide disclosed by the invention is used as a photocatalytic material and shows excellent photocatalytic performance.

The present invention belongs to the technical field of desulfurization activated carbon regeneration, and relates to a blast furnace gas desulfurization activated carbon regeneration process and device, the regeneration device includes a washing and extraction tank, a regeneration reactor, a gas detection and analysis system, an automatic control system, a temperature monitoring system, and a deoxygenation reactor; the regeneration process includes S1, washing and extraction, S2, heating regeneration: according to the sulfur content of the outlet gas of the regeneration reactor, the heating temperature is adjusted by gradient, and the temperature range of the regeneration reactor is controlled: 150-300°C, and the temperature gradient is 30-50°C; S3, gas circulation, air oxidation, so that elemental sulfur is precipitated from polysulfide. The regeneration process of the present invention has a small carbon loss rate, increases the number of regenerations, and further reduces costs; the temperature of the thermal regeneration process is 150-300°C, the regeneration temperature is low, and the regeneration temperature can be adjusted according to the outlet gas concentration gradient, reducing energy consumption, and at the same time ammonia resources can be recycled, reducing the amount of solution used and the amount of waste liquid discharged, and the regeneration process can obtain elemental sulfur with economic value.

The invention provides a wastewater advanced oxidation catalyst and a preparation method and application thereof, the wastewater advanced oxidation catalyst is of a core-shell structure, the core is activated carbon containing copper oxide and optional ferrous sulfide, and the shell is a silicon oxide-aluminum oxide compound containing nano ferrous sulfide. The invention further provides a preparation method of the wastewater advanced oxidation catalyst and application of the wastewater advanced oxidation catalyst in organic wastewater treatment. The wastewater advanced oxidation catalyst has the characteristics of high catalytic degradation capability on organic pollutants and the like, solves the problem of copper dissolution, and improves the long-term effectiveness of the catalyst.

The invention relates to the technical field of waste gas treatment, and discloses a desulfurization purification device and process based on industrial waste gas treatment.The desulfurization purification device comprises a desulfurization tower, a rotational flow mechanism, a transmission mechanism and a solid-liquid separation mechanism and further comprises a collection box fixedly installed at the bottom of the desulfurization tower and a dust removal mechanism fixedly installed on one side of the desulfurization tower; according to the technical scheme, through the combined action of spiral blades in the rotational flow mechanism and the transmission mechanism, an efficient rotating flow field is formed, the retention time of waste gas in the tower is prolonged, sulfide and atomized reaction liquid are more fully contacted, chemical reaction of the reaction liquid on the sulfide is promoted, and therefore efficient sulfide removal and purification are achieved; wherein the rotational flow mechanism endows the waste gas with tangential speed through inclined blades in the rotational flow mechanism, so that the waste gas rotates, a spiral ascending flow field is formed in the desulfurization tower, the retention time of the waste gas is prolonged, the contact opportunity of the waste gas and atomized reaction liquid is increased, sulfide absorption is facilitated, and the desulfurization purification effect is improved.

The invention belongs to the technical field of nano composite materials, and discloses a novel transition metal-inserted transition metal sulfide composite rare earth oxide photocatalytic material with a solid mediator Z-type heterostructure, and a preparation method and application of the novel transition metal-inserted transition metal sulfide composite rare earth oxide photocatalytic material. The preparation method comprises the following steps: mixing transition metal salt, thioacetamide, nitrate hexahydrate and water to obtain a mixed solution 1; mixing the mixed solution 1 with a hydrazine hydrate solution, and performing hydrothermal reaction to obtain a mixed solution 2; mixing the mixed solution 2 with ammonia water, and sequentially carrying out hydrothermal reaction, drying and calcining to obtain a calcined product; and mixing the calcined product with a sodium borohydride aqueous solution, and drying to obtain the photocatalytic material. The obtained photocatalytic material of the transition metal inserted transition metal sulfide composite rare earth oxide with the solid mediator Z-type body heterostructure has the characteristics of high stability, safe interface contact and rapid charge migration.

The invention relates to the technical field of fire coal additives, in particular to a high-efficiency coal saving agent and a preparation method thereof. The coal saving agent is prepared from the following raw materials in percentage by mass: 7-14% of an oxygen supply agent, 5-12% of a combustion improver, 5-13% of a catalyst, 0.1-1% of industrial waste residues, 1-3% of a desulfurization additive, 1-2% of a dispersing agent and the balance of deionized water, wherein the catalyst is a Ce-Mn / TiO2 catalyst, and the catalyst is a TiO2 catalyst; the industrial waste slag is selected from at least one of cold-rolled iron oxide slag, nickel slag or steel slag; the desulfurization additive is selected from at least one of calcium acetate, calcium oxide or calcium carbonate. The coal-saving agent can effectively improve the combustion characteristic of coal, improve the combustion efficiency and the combustion effect, and realize the efficient coal-saving effect under the condition of low mixing amount; meanwhile, desulfurization and denitrification can be achieved, emission of sulfide and nitric oxide is reduced, and environmental pollution can be prevented and controlled.

The invention relates to the technical field of mineralogy, and provides a prediction method for mineral flotation yield. According to the method, the content and dissociation degree of the target minerals under different size fractions are accurately obtained through the technologies of ore grinding, system screening and automatic mineralogy analysis, the yield prediction method based on the mineral selectability physical model is established, the crossing from elements to minerals and from the whole to the size fractions can be achieved, and the yield prediction accuracy is improved. And a brand-new, scientific and reliable technical reference is provided for precise prediction and process optimization of the sulfide ore flotation yield.

The invention relates to the technical field of lithium ion batteries, in particular to a preparation method of an interface-modified high-rate lithium iron phosphate positive electrode material, which is used for solving the problems of low interface impedance, low rate capability and low energy density of the existing lithium iron phosphate. According to the preparation method, zirconium-niobium co-doped iron phosphate is used as a precursor of the lithium iron phosphate positive electrode material, a lithium ion diffusion channel is widened, the lithium ion diffusion coefficient is improved, meanwhile, an olivine structure framework is provided, a wider tunnel space is provided for lithium ion migration, zirconium-niobium provides additional electrons, and the electron conductivity is improved through cooperation of the zirconium-niobium co-doped iron phosphate and the olivine structure framework; li2ZrCl6-LiCl interface modification can isolate sulfide electrolyte from being in direct contact with a positive electrode material, and interface side reaction is inhibited; carbon nanotube coating can enhance the conductivity, reduce erosion, improve the diffusion coefficient of Li < + > and the stability of the material structure, and improve the charge-discharge rate.

The invention provides a method and a device for recovering valuable metals from copper smelting slag, and the method for recovering valuable metals from copper smelting slag comprises the following steps: before molten copper smelting slag is transferred into a slag ladle for cooling, adding first gas, gypsum slag and nitrogen into the molten copper smelting slag in a plasma injection mode, and after injection is completed, adding second gas into the slag ladle for cooling; and metal gaseous substances and copper slag are obtained. Carrying out post-treatment and flotation on the copper slag to obtain a valuable metal sulfonium phase and depleted slag; wherein the first gas is one or more of CO, H2, CO2 and CH4; and the metal gaseous substances comprise gaseous lead and gaseous zinc. And the valuable metal sulfonium phase is sulfides of copper, iron, lead and zinc. The process method and device are simple, the production time is shortened, CO2 emission can be reduced, secondary pollution caused by waste water and waste residues is avoided, and the green metallurgy requirement is met.

The invention belongs to the field of mineral flotation, and particularly discloses an inhibitor, a flotation reagent and a method for flotation separation of molybdenite and other metal sulfide ores, and the flotation inhibitor is a compound with a formula 1 # imgabs0 # structure; r1 is a substituted alkyl group with an active group; r2 is H, a sulfonic group or a substituent which is the same as R1; the active group comprises at least one of hydroxyl, amino, carboxyl and sulfonic group. The inhibitor in the formula 1 can selectively inhibit metal sulfide ores such as copper, lead and iron, but basically does not inhibit molybdenite, so that selective flotation separation of the molybdenite and the sulfide ores such as copper, lead and iron can be realized.

This invention relates to a method for the combined leaching of high-silicon zinc roasted ore and high-sulfur zinc oxide powder, belonging to the field of hydrometallurgical technology. The high-sulfur zinc oxide powder is leached neutrally to obtain zinc oxide leaching residue and zinc powder leaching solution. The zinc powder leaching solution is then mixed with high-silicon zinc roasted ore slurry for controlled silica leaching of the high-silicon zinc roasted ore to obtain zinc ore leaching residue and zinc ore leaching solution. The zinc powder leaching residue and zinc ore leaching residue are mixed and then subjected to low-acid leaching to obtain low-leaching residue and low-leaching solution. The low-leaching residue is then subjected to hot acid leaching to obtain hot-leaching residue and hot-leaching solution. The hot-acid residue is then subjected to high-acid leaching to obtain lead-silver slag product and high-leaching solution. The hot-leaching solution is neutralized and reduced by high-sulfur zinc oxide powder to obtain neutralized solution and neutralized residue. The neutralized solution is then subjected to mineralization and iron precipitation to obtain hematite product and iron-removed solution. This invention can effectively control the leaching of silicon in the high-silicon zinc roasted ore leaching process, and simultaneously realize the oxidative leaching of sulfides in zinc oxide powder and the reductive leaching of zinc ferrite in zinc roasted ore, thus simplifying the leaching process of zinc roasted ore and zinc oxide powder.

The mining area tailing grading filling system is composed of a tailing collecting device, a grading module, a filling slurry preparing module, a conveying module and a filling module and is designed according to the characteristics that tailings of lead-zinc-silver ore and copper-tin-silver-zinc ore contain heavy metal and are complex in particle size. A heavy metal adsorption layer is arranged at the bottom of a collection pool of the tailings collection device, and a sulfide adsorbent is adopted, so that heavy metal ions such as lead, zinc and copper in the tailings can be effectively adsorbed; a cyclone of the grading module is made of a corrosion-resistant material, erosion of chemical substances in the tailings is prevented, the tailings are accurately graded, and grading of filling materials is optimized; the tailings with different particle sizes are accurately separated according to the characteristics of the tailings of the lead-zinc-silver ore and the copper-tin-silver-zinc ore by using the cyclone and multi-layer vibrating screen combined grading equipment; equipment parameters are adjusted to accurately control the granularity of the tailings, so that reasonable grading raw materials are provided for preparation of filling slurry, and the compactness and the stability of a filling body are improved.

An electrode composite material and a method of making same are disclosed. A mixture that includes lithium sulfide (Li2S) particles containing a Li2S compound, carbon particles, and halogenated lithium phosphorous sulfide (LPS-X) particles containing an LPS-X (X is F, Cl, Br, and / or I) compound are provided. The LPS-X particles have crystallinity which can be confirmed with XRD of the LPS-X particles or the mixture showing XRD peaks indicative of crystalline LPS-X. The mixture does not include lithium phosphorous sulfide (LPS) particles made of an LPS compound. The mixture is ball-milled to provide a ball-milled composite material. At least part of the LPS-X compound contained in at least part of the LPS-X particles is converted to the LPS compound. XRD of the ball-milled composite material shows none of the XRD peaks indicative of crystalline LPS-X.

The invention provides a sulfide solid electrolyte and a preparation method of the sulfide solid electrolyte. The sulfide solid electrolyte is a phosphorus-free solid electrolyte, and has a chemical general formula as shown in a formula I: Li < 7-m > MS < 6-m-n > OnXm, wherein M comprises at least one of As, Sb and Bi, and X comprises at least one of F, Cl, Br and I and 1lt; mlt; mlt; 2, 0.5 < = nlt; and 3, the sulfur-oxygen ratio S / O in the formula I is greater than 1. The sulfide solid electrolyte has excellent ionic conductivity and air stability.

The invention provides a sulfide solid electrolyte with an MOF structure, and a preparation method and application thereof, the process is designed from a molecular level, and lithium ions and sulfur elements are used as basic components for constructing an MOF skeleton through in-situ combination of excellent ion conduction capability of the sulfide electrolyte and structural advantages of an MOF material; the bulk sulfide electrolyte with a regular three-dimensional multi-channel crystalline MOF structure is directly synthesized and constructed by taking a sulfur element as an inherent component of an MOF skeleton in a breakthrough manner, so that the intrinsic design of the sulfide MOF skeleton electrolyte is realized, and the problems of interface bonding, performance stability and ion transmission path are fundamentally solved; a sulfur element in the electrolyte is derived from sulfur atoms (such as-SH and-S-) of a ligand and participates in construction of an MOF skeleton, the electrolyte has the advantages of good interface stability, regular ion transmission channels, adjustable mechanical properties and the like, and the problems of poor interface stability, irregular ion transmission paths and the like of a sulfide electrolyte in the prior art are solved.

The invention provides an impurity removal method of a gallium-rich solution for a gallium-based fluorescent powder precursor, and belongs to the field of preparation of gallium-based fluorescent powder precursors. The method comprises the following steps: adding an oxidizing agent into an initial gallium-rich solution to carry out a first reaction so as to remove organic impurities in the initial gallium-rich solution and obtain a first gallium-rich solution; adding a composite impurity removal reagent into the first gallium-rich solution to carry out a second reaction to remove impurity elements such as calcium, silicon and vanadium in the first gallium-rich solution so as to obtain a second gallium-rich solution; and adding a sulfide type reagent into the second gallium-rich solution to carry out a third reaction so as to remove copper and iron impurity elements in the second gallium-rich solution, thereby obtaining the gallium-rich solution for the gallium-based fluorescent powder precursor. According to the method, various key impurity elements such as organic matters, alkaline earth metals, metalloids and heavy metals are directionally and efficiently removed through the impurity removal logic of oxidation impurity breaking, synergistic precipitation and deep vulcanization, so that the total content of the key impurity elements in the gallium-rich solution is remarkably reduced.

The lithium-ion battery provided comprises a separator, a cathode electrode, an anode electrode, and an electrolyte, wherein a coating of the cathode electrode comprises a cathode material; the cathode material comprises a cathode active material, a conductive agent, and a binder; the cathode active material comprises at least one selected from the group consisting of lithium iron phosphate and lithium manganese oxide. The coating of the cathode electrode further comprises an anode SEI layer-forming additive; and / or, the electrolyte comprises an anode SEI layer-forming additive; the anode SEI layer-forming additive comprises at least one selected from the group consisting of elemental sulfur and a metal sulfide. The electrolyte comprises a SEI layer-forming solvent. The lithium-ion battery provided in the present disclosure can effectively improve the cycling performance of lithium-ion batteries using lithium iron phosphate or lithium manganese oxide as a cathode active material.

The invention relates to a modified molecular sieve and a preparation method and application thereof, and the preparation method comprises the following steps: alkali modification: obtaining an alkali modified ultra-stable Y molecular sieve; performing nickel ion exchange for many times to obtain a nickel ion loaded ultra-stable Y molecular sieve; and carrying out cerium ion exchange to obtain the nickel-cerium double-loaded ultra-stable Y molecular sieve. On the basis of an ultra-stable Y-type molecular sieve, a novel modified molecular sieve is prepared through further modification treatment, so that the adsorption performance of the novel modified molecular sieve on organic sulfides such as mercaptan and thioether in oily sewage and oily waste gas is improved, and a more efficient, economical and environment-friendly technical solution is provided for VOCs emission treatment in the petrochemical industry; the method has important application value and market prospect.

The invention discloses asphalt-based hard carbon, a preparation method thereof and a sodium-ion battery negative electrode material, and relates to the technical field of sodium-ion batteries. The preparation method of the asphalt-based hard carbon comprises the following steps: S1, mixing an asphalt precursor, a sulfur source and a cross-linking agent, and performing cross-linking vulcanization treatment at a first temperature to obtain a primary product; s2, performing carbonization treatment on the primary product at a second temperature to obtain asphalt-based hard carbon; the sulfur source is any one of elemental sulfur, thiourea, dimethyl sulfide and sulfide, or any two of elemental sulfur, concentrated sulfuric acid, thiourea, dimethyl sulfide and sulfide. By adopting the method, the type of the sulfur source is controlled, and the sulfur source and the cross-linking agent are added, so that the reversible capacity and the rate capability of the asphalt-based negative electrode material can be effectively improved, and the application field of the asphalt-based negative electrode material is widened.

The invention belongs to the technical field of hydrometallurgy, and particularly relates to a pretreatment method for enhancing peroxide to improve the leaching rate of high-sulfur-arsenic gold ore. Comprising the following steps that the high-sulfur-arsenic gold ore is ground and then prepared into ore pulp; an oxidizing agent is added into the ore pulp, oxidation pretreatment is conducted on the high-sulfur-arsenic gold ore under the catalytic action of ultraviolet light, and ore pulp activation liquid is formed; and the pH of the ore pulp activating solution is adjusted to 9-12, a gold leaching agent is added into the ore pulp complexing solution, and stirring gold leaching treatment is conducted. According to the method, efficient oxidation of sulfide and arsenide is achieved under the mild condition through the synergistic effect of photocatalysis and chemical oxidation, the leaching rate of gold is remarkably increased, compared with a conventional peroxide oxidation method for pretreatment, the leaching rate can be increased by 10%-35%, and meanwhile the agent use amount and environmental pollution are reduced.

The invention discloses a method for separating valuable metal in a waste photovoltaic welding strip through reduction smelting-vacuum gasification-vulcanization, and belongs to the technical field of resource recycling. The method comprises the steps that the waste photovoltaic welding strip is placed in a reducing atmosphere and heated for reduction smelting, so that carbon impurities on the surface of the waste photovoltaic welding strip are removed, tin, lead, silver and copper oxides on the surface are reduced, and a copper-tin-lead-silver alloy is obtained; then, heating the decarbonized and deoxidized photovoltaic welding strip under a vacuum condition, and carrying out vacuum gasification separation to obtain condensed metal lead and a copper-tin-silver alloy; and finally, sulfur is added into the copper-tin-silver alloy for vacuum vulcanization-separation, and volatile matter stannous sulfide and residual copper-silver alloy are obtained. According to the method, valuable metals in the waste photovoltaic solder strip can be efficiently separated, and the method has the advantages of being green and economical.

The invention relates to preparation and application of a substituted alkyl sulfide (sulfoxide) arylamine derivative. Specifically, the invention relates to a compound as shown in a formula (I), or an isotope labeled compound thereof, or an optical isomer, a geometric isomer, a tautomer or an isomer mixture thereof, or a pharmaceutically acceptable salt thereof, and an application of the compound in preparation of an acaricide for preventing and controlling pest mites, wherein the compound is used as a substituted alkyl sulfide (sulfoxide)-based arylamine derivative. The compound can achieve a better pest mite control effect at a lower dosage.

The invention belongs to the technical field of nano materials, and particularly relates to a preparation method of antimony sulfide with good crystallinity and application of the antimony sulfide in a sodium ion battery. Antimony oxide is used as an antimony source, sulfide salt is used for dissolving the antimony source, antimony sulfide precipitates are obtained by adjusting the pH value of the solution, and the method specifically comprises the following steps that S1, the sulfide salt and antimony oxide are evenly mixed and then stirred at a high speed in water to be dissolved, a dispersing agent is added, and an antimony solution is obtained; s2, controlling the temperature of the antimony solution, adding an acid solution, adjusting the pH value, and stirring for reaction to obtain a precipitate; s3, filtering out the precipitate obtained in S2, washing with absolute ethyl alcohol for three times, and then drying at low temperature to obtain antimony sulfide particles; and calcining the antimony sulfide particles under the protection of inert gas to obtain the nano antimony sulfide with good crystallinity. The method has the advantages that the prepared nano antimony sulfide is uniform in granularity, good in dispersity and controllable in morphology; the product has the advantages of few impurities, high yield and high yield; the technological process is simple and low in cost.

The invention relates to the technical field of mineral resource prospecting exploration, in particular to a prospecting prediction method based on a compound rock mass anatomy porphyry-skarn composite mineralization system. The control factors and formation mechanism of the ore deposit are clarified, and the deep earth dynamics process of porphyry mineralization development is disclosed. Through typical ore deposit fine dissection, the space-time structure characteristics of mineralization in different structural evolution stages are discussed; according to the method, mineral in-situ micro-area surface scanning and sulfide isotope in-situ tracing technologies are utilized to determine occurrence forms of metallogenic elements, restrain activation migration behaviors of microelements, find out sources of metallogenic metal substances, reveal a superposition metallogenic development mechanism and provide theoretical basis and technical support for prospecting exploration.

The invention discloses a groove wall type sulfur positive electrode material and a preparation method thereof, and relates to the technical field of electrode materials. The reduced graphene oxide aerogel is used as a carrier of active component sulfur, a channel is prepared on the surface of the reduced graphene oxide aerogel based on a picosecond laser processing technology, the groove wall type sulfur positive electrode material is obtained, a unique layered pore wall structure can be realized in an electrode, a greater inhibition effect can be achieved on a shuttle effect of lithium-sulfur battery polysulfide, and the performance of the lithium-sulfur battery is improved. And active substances at the bottoms of the walls can be immersed into the channels along with the electrolyte to be fully utilized. The positive electrode material prepared on the basis of a picosecond laser processing technology has the characteristics of excellent use performance and high stability.

Provided is a composite active material that is capable of more suppressing deterioration of an active material caused by the moisture of the composite active material than a conventional composite active material by increasing a permissible water content of a layer of the composite active material. The composite active material that is used for solid-state batteries includes: an active material; a first coat layer that contains a fluoride-containing first solid electrolyte, the first coat layer coating at least part of a surface of the active material; and a second coat layer that contains a sulfide-containing second solid electrolyte, and a solvent, the second coat layer coating at least part of the first coat layer, wherein a water content of the composite active material at 200° C. measures at most 823 ppm on a Karl Fischer titrator.

The invention relates to the field of sewage treatment, and discloses a sewage treatment method based on desulfurization and denitrification, which comprises the following steps: S1, magnetic flocculation-electro-catalysis pretreatment: adding a polyaluminum chloride-magnetic powder composite flocculant into sewage through a magnetic flocculation reactor to form a magnetic floc, removing suspended matters through a permanent magnetic separation device, and then entering an electro-catalysis oxidation pond, carrying out electrolysis by taking titanium-based lead dioxide as an anode and active carbon fiber as a cathode; and S2, performing synchronous desulfurization and denitrification on the three-dimensional electrode fluidized bed, feeding pretreated effluent into a three-dimensional electrode fluidized bed reactor, filling activated carbon particles as a third electrode, and adding a composite flora of thiobacillus and denitrifying bacteria. The efficient removal of sulfides, total nitrogen, total phosphorus and chemical oxygen demand in the sewage is realized through a multi-stage synergistic process of magnetic flocculation-electrocatalysis pretreatment, synchronous desulfurization and denitrification of a three-dimensional electrode fluidized bed, deep denitrification and dephosphorization of a denitrification filter tank and catalytic ozonation-membrane separation combined deep treatment.

The invention provides the preparation method of the efficient photocatalyst which is simple and convenient, does not contain noble metals or toxic metals and does not need a cocatalyst. In the invention, a strategy for synergistically improving the catalytic performance by regulating and controlling sulfur vacancies and doping copper ions is provided, zinc indium sulfide (ZIS) is selected as a substrate material, the content of sulfur atoms is increased in the synthesis process through a solvothermal method to introduce the vacancies, and Cu (NO) is synchronously added to introduce Cu, so that the catalytic performance is improved. The Cin-VZIS catalyst is successfully prepared (n is a doping proportion relative to Zn). A TEOA aqueous solution is used as a sacrificial agent to carry out photocatalytic hydrogen production reaction, the synergistic effect of the two modification modes can significantly improve the performance of the catalyst, and when the copper doping ratio is 1.5%, the catalytic activity reaches the highest and is 1.799 mmol.g.h, which is 7.5 times of that of an original ZIS catalyst. The prepared catalyst is high in activity and good in stability, and a new way is provided for developing efficient and stable solar hydrogen production materials.

The invention belongs to the field of gas sensors, and discloses an indium oxide composite material based on palladium doping and a preparation method and application thereof.The preparation method comprises the steps that indium nitrate, absolute ethyl alcohol, ammonia water and deionized water are used for preparing an indium oxide material, then palladium ions are doped in an indium oxide solution to obtain a palladium ion-doped indium oxide solution, and the palladium ion-doped indium oxide solution is subjected to vacuum drying to obtain the palladium ion-doped indium oxide composite material. And reducing and centrifuging by using sodium borohydride to obtain a palladium-doped indium oxide composite material, and then preparing the palladium-doped indium oxide composite material into the gas sensor. The key technological process design of the preparation method is improved, so that the problems that the reaction of a pure indium oxide gas sensor needs relatively high activation energy and the surface of a pure semiconductor lacks selectivity to sulfide can be effectively solved, and the detection of dimethyl disulfide gas is realized.

The invention relates to the technical field of preparation of high-entropy alloy materials, in particular to a C / S / HES composite electrode material based on high-entropy sulfides and a preparation method and application thereof.The preparation method comprises the following steps that a carbon material is dispersed in N, N-dimethylformamide to obtain a carbon material dispersion liquid, an iron source, soluble metal salt and sublimed sulfur are mixed with a carbon source solution, and the carbon material dispersion liquid is obtained; carrying out hydrothermal reaction to obtain high-entropy sulfide; mixing a carbon source with sublimed sulfur, and carrying out hot melting treatment to obtain a carbon / sulfur positive electrode material; the preparation method comprises the following steps: taking a high-entropy sulfide as an electrocatalyst, mixing and grinding the high-entropy sulfide and a carbon / sulfur positive electrode material, and carrying out hot melting treatment to obtain the C / S / HES composite electrode material based on the high-entropy sulfide. The electrochemical kinetics of soluble NaPSs in the sodium-sulfur battery is accelerated by screening a proper high-entropy sulfide catalytic host, and the electrochemical behavior is improved.