72 results about "Silver sulfide" patented technology

The invention belongs to the field of electronic paste, and particularly discloses conductive silver paste and a preparation method thereof. The conductive silver paste comprises anti-sulfuration silver powder; the anti-sulfuration silver powder comprises silver powder and an anti-sulfuration agent coated on the surface of the silver powder. The silver powder is coated with the anti-vulcanizing agent, so that on one hand, the overall anti-vulcanizing performance of the paste can be remarkably improved on the premise of relatively low volume resistivity; and on the other hand, the dosage of the anti-vulcanizing agent and the influence of introduction of the anti-vulcanizing agent on the conductivity can be reduced, attenuation of the conductivity is avoided, and the dispersity of the prepared anti-vulcanizing silver powder can also be improved. In addition, the conductive silver paste can be cured at low temperature, the production cost is saved, and the production efficiency is improved.

The invention relates to the field of coatings, and particularly discloses nano silver sulfide modified carbon nitride and application thereof, an inorganic coating and a preparation method of the inorganic coating, and the nano silver sulfide modified carbon nitride is three-dimensional porous nano silver sulfide modified carbon nitride obtained by calcining nano silver sulfide and carbamide. The inorganic coating comprises the following raw materials in parts by weight: a silicate solution, an acrylic emulsion, cellulose, nano silver sulfide modified carbon nitride, a filler, an auxiliary agent and water. According to the nano silver sulfide modified carbon nitride disclosed by the invention, the situation that a photocatalytic material in traditional latex paint is massively wrapped, cannot be in contact with an external environment and loses a catalytic effect is reduced, and the nano silver sulfide modified carbon nitride has very high catalytic activity and response efficiency to visible light and can better remove formaldehyde.

A method of water decontamination includes contacting sulfur-doped silver tungstate (Ag2WO4) nanoparticles with an aqueous solution to form a mixture. The aqueous solution includes one or more pollutants. The method further includes mixing the mixture and collecting a filtrate. The filtrate has fewer of the one or more pollutants than the aqueous solution. The amount of sulfur present in the sulfur-doped Ag2WO4 nanoparticles is in a range from 5% to 30% of the total weight of the sulfur-doped Ag2WO4 nanoparticles, and the sulfur-doped Ag2WO4 nanoparticles are spherical particles with diameters ranging from 2 nanometers (nm) to 40 nm.

Disclosed herein is a porous substrate having silver and optionally silver oxide and a silver sulfide coating. Also disclosed herein is a battery having a cathode, an anode, and a separator between the cathode and the anode. The cathode includes a substrate having silver and optionally silver oxide and a silver sulfide coating. Also disclosed herein is a method of submerging a substrate having silver and optionally silver oxide in a solution of elemental sulfur in dimethyl sulfoxide to form silver sulfide on the surface of the substrate.

According to the all-solid-state battery, argyrodite type electrolytes Li < 5.5-x > Ag < x > S < 4.5 > PCl < 1.5 > and Li < 5.3-x > Ag < x > S < 4.3 > PCl < Br < 0.7 > are prepared by using silver sulfide, cuprous sulfide, lithium sulfide, phosphorus pentasulfide, anhydrous lithium chloride or silver chloride, phosphorus pentasulfide and anhydrous lithium chloride as raw materials. The all-solid-state battery is not limited to solid-state electrolytes Li < 5.5-x > Ag < x > S < 4.5 > PCl < 1.5 >; on a single parent Li6PS5Cl, Li5.3 PS4.3 Cl < 1.7 >, Li5.4 PS4.4 Cl < 1.6 >, Li5.5 PS4.5 Cl < 1.5 >, Li5.7 PS4.7 Cl < 1.3 >, Li5.25 PS4.25 Cl < 17 >, Li5.2 PS4.2 Cl < 1.8 > and the like, multiple halogen element anions are used for replacing single halide anions, and silver ions Ag < + > or cuprous ions Cu < + > are used for partially replacing lithium ions, so that the solid electrolyte with the same order of magnitude as that of the single parent in ion conductivity is obtained, and the prepared electrolyte membrane has the cascade heterogeneous interface gating characteristic and can be applied to the field of lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries and lithium ion batteries. The transmission movement of lithium ions in an electric field can be adjusted, anisotropic growth of lithium dendrites is reduced, the service life of the all-solid-state battery is greatly prolonged, meanwhile, raw materials with lower manufacturing cost are adopted, the preparation process of the solid-state battery is simplified, the production cost is greatly reduced, and the production efficiency is improved.

An active cathode material is doped with silver to effectively improve the cathode's electrical conductivity. The active material may be sulfur, and the silver may be in the form of silver, silver sulfide, or both. If desired, the cathode material includes a matrix of conductive nano-particles which include elemental sulfur, silver and or silver sulfide. The present disclosure may be applicable to other battery materials as well, such as, for example, lithium iron phosphate.

The invention provides a reflective integrated electrochromic device. The reflective integrated electrochromic device sequentially comprises a first substrate layer, a working electrode layer, an integrated electrochromic layer, a counter electrode layer and a second substrate layer, the integrated electrochromic layer comprises a metal source compound; the metal source compound is selected from silver chloride, silver acetate, silver nitrate, silver perchlorate, silver sulfate, silver cyanide, silver sulfide, silver hexafluorophosphate, silver tetrafluoroborate, silver tetrachloroaluminate, silver trifluoromethanesulfonate, silver bis (trifluoromethane sulfonimide), copper fluoride, copper chloride, copper cyanide, copper sulfate, copper acetate, copper aluminate, cuprous fluoride, cuprous chloride, cuprous cyanide, gold chloride and gold cyanide; the catalyst is one or more of gold sulfide, gold chloride, gold (II) sulfide, nickel chloride, nickel sulfate, cobalt chloride and platinum chloride. The device has a relatively large transmittance / reflectivity dynamic change range, can perform light and heat management at the same time, and can keep a stable coloring or fading state for one month or even several months under a no-load condition.

The invention discloses a flotation reagent for copper-molybdenum-gold-silver sulfide ore and a cascade enrichment flotation method for the copper-molybdenum-gold-silver sulfide ore, and relates to the technical field of mineral flotation. A composite inhibitor is formed by compounding nitration modified humic acid and nano silicon dioxide according to the mass ratio, synchronous collection of copper, molybdenum and gold is enhanced under the action of a composite collecting agent, and the flotation efficiency of the copper-molybdenum-gold-silver sulfide ore is improved. According to the composite collecting agent, mercaptobenzothiazole and hydroximic acid are compounded, and the recovery rate of gold and silver is increased through the synergistic effect. The process comprises a mixed flotation stage and a stepped separation stage, and copper-molybdenum-gold-silver concentrate is finally obtained. The method solves the problems of difficult sulfur-noble metal separation and high medicament toxicity in the traditional process, and has the advantages of high efficiency, environmental protection and short process.

This invention relates to the field of nanocomposite materials technology, specifically to a carbon-based silver sulfide composite aerogel with synergistically enhanced light-harvesting and biofouling resistance, its preparation method, and its applications. The method involves pouring a chitosan-graphene solution into a polystyrene mold and using different cryogenic casting methods to obtain chitosan-graphene aerogels with different orientations. Carbonization under a N2 atmosphere yields carbon-based aerogels with different structures. Immersion in a tannic acid-Tris solution allows for the adsorption of tannic acid molecules. After washing with deionized water, the aerogels are immersed in a silver nitrate solution to form tannic acid-silver ion complexes. Further washing with deionized water and immersion in a thioacetamide solution yields carbon-based silver sulfide composite aerogels with different structures. This method solves the problem of performance loss due to biofouling in carbon-based three-dimensional porous materials. The carbon-based silver sulfide aerogel exhibits superior light absorption and photothermal properties compared to carbon-based zinc oxide aerogels, overcoming the problem of weakened evaporation performance in conventional anti-biofouling designs.

The invention provides a silver sulfide-based plastic thermoelectric material and a preparation method and application thereof, and belongs to the technical field of thermoelectric materials. The chemical formula of the thermoelectric material is Ag < 6-y > Se < 1-x > Te < 1 + x >, wherein 0 lt; xlt; 0.5, 0 < = y < lt >; and 0.03 part. On the basis of the existing silver sulfide-based plastic thermoelectric material Ag6SSeTe, the optimization of the carrier concentration of the material is realized by reducing the position electronegativity of anions and introducing silver vacancies, and the collaborative optimization of the power factor and the thermal performance of the material is further realized. The room-temperature thermoelectric figure of merit of the optimal sample Ag < 5.98 > Se < 0.6 > Te < 1.4 > reaches 0.65, which is the best as the current silver sulfide-based plastic thermoelectric material. Compared with the prior art, the thermoelectric performance of the obtained thermoelectric material is remarkably improved, and meanwhile good structural stability and plastic deformation capacity of a sample are maintained. Elements required for material preparation are rich in reserves, the price is low, the preparation process is simple, and large-scale production and commercial application are facilitated.

The invention discloses a silver sulfide quantum dot loaded composite photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of greenhouse gas treatment. According to the invention, different amounts of AgNO3 and 3-mercaptopropionic acid are added on the surface of CuInS2 to introduce Ag2S quantum dots in situ, so that the separation and transfer capabilities of photo-generated charges are enhanced; the composite catalyst can construct carbon dioxide reaction active sites on the premise of maintaining the unique structure and electronic characteristics of the ternary chalcogenide, improves the carbon dioxide photoreduction reaction activity, and can maintain good stability.

The present invention discloses a flotation agent for copper, molybdenum, gold, and silver sulfide ores and a cascade enrichment flotation method for copper, molybdenum, gold, and silver sulfide ores, relating to the field of mineral flotation technology. The composite depressant is compounded with nitrated modified humic acid and nano-silicon dioxide in a certain mass ratio. This depressant enhances the simultaneous capture of copper, molybdenum, gold, and silver under the action of a composite collector. The composite collector is compounded with mercaptobenzothiazole and hydroxamic acid, synergistically improving the recovery rate of gold and silver. The process includes a mixed flotation stage and a cascade separation stage, ultimately yielding a copper, molybdenum, gold, and silver concentrate. This process addresses the difficulties in separating sulfur and precious metals and the high toxicity of the reagents in traditional processes, offering the advantages of high efficiency, environmental protection, and a short process.

An electrochemically mediated, hydrometallurgical method is provided for extraction of nickel, zinc, lead, silver, molybdenum, and / or copper from sulfide minerals. These metal concentrates, such as pentlandite, pyrrhotite, pyrite, sphalerite, galena, Ag2S, MoS2, etc., are contacted with nitric acid and cerium(IV) nitrates, cerium(IV) methanesulfonate, and / or cerium(IV) sulfate, as oxidative leaching agents to preferentially leach the target metals contained therein. The strong oxidizing capacity of cerium(IV) enables rapid dissolution of metal sulfides under ambient conditions. Cerium(IV) can be electrochemically regenerated and recycled for treatment of additional sulfide minerals. Target metal products can be extracted via processes such as solvent extraction and precipitation, enabling complete recovery, e.g., of nickel from pentlandite.

The invention discloses a preparation method of a three-phase Ag / Ag2S / h-RGO photocatalyst, comprising the following steps: functionalized SiO2 nanospheres are added to ultrapure water and dissolved to obtain a mixed solution; graphene oxide is dispersed in ultrapure water, ultrasonicated, and then placed in the mixed solution and vigorously stirred to generate SiO2@GO; NaBH4 is then added and stirred, followed by sodium hydroxide, the mixture is stirred, and the resulting product is washed to obtain h-RGO; h-RGO is dissolved in water, thioglycolic acid is added, and vigorously stirred; AgNO3 is then added and stirred, followed by Na2S·9H2O and stirred, followed by centrifugation to obtain a product dissolved in water, and silver sulfide is in situ reduced with a sodium borohydride solution; the product is washed and dried to obtain a three-phase Ag / Ag2S / h-RGO photocatalyst. The present invention adopts a layer-by-layer (LBL) self-assembly method to synthesize nanosheets RGO with a hollow structure, and a simple in situ growth method is used to prepare a three-phase Ag / Ag2S / h-RGO photocatalyst.

The invention discloses a preparation method of an efficient light-emitting silver-indium-sulfur and silver-indium-zinc-sulfur composite nano material, and belongs to the technical field of light-emitting nano materials and preparation. The preparation method comprises the following steps: by taking silver dibutyl dithiocarbamate, indium dibutyl dithiocarbamate and zinc carboxylate as precursors, uniformly mixing at a dodecane neutralization pretreatment temperature to form a mixed solution A; naturally cooling, adding dodecanethiol, and uniformly stirring and mixing to obtain a mixed solution B; at the reaction temperature, decomposing part of silver dibutyldithiocarbamate in the mixed solution B to generate silver sulfide clusters; the activity of the silver sulfide cluster is closely related to the size, the silver sulfide cluster is used as a seed to induce growth of silver-indium-zinc-sulfur, meanwhile, silver sulfide is converted into silver-indium-sulfur, finally, the silver-indium-sulfur and silver-indium-zinc-sulfur composite nano material is obtained, the band gap is 2.0-2.8 eV, the luminous efficiency is 52% or above, and the luminous efficiency can still be kept at 78% or above after five months. The preparation process disclosed by the invention is low in raw material cost and good in process controllability.

A hydrometallurgical apparatus and method for direct leaching of copper, gold, and silver sulfide and oxide minerals of intermediate particle size, called Templar Technology, is disclosed. It comprises a closed reactor equipped with an agitation and transport mechanism using an internal shaftless helical screw with a spiral of 35 to 50 mm structural thickness, arranged concentrically within a cylinder with an anti-corrosive and anti-slip lining inert to chloride-oxidizing media. The reactor is hermetically interconnected in its upper section to a system for the condensation, capture, and continuous recirculation of gaseous phases by means of pure oxygen injection to induce premature oxidation of the mineral, guiding the gases to a horizontal condenser with an inverted asymmetric return of condensed liquid gases into the reactor.The method comprises the activation, desliming, and mixing of the ore in a controlled, closed-circuit grinding system to a cut size of between 200 and 400 µm, with 300 µm being the target. A hydro-desilter and a deep-cone settler are coupled to self-regulate a feed pulp moisture content of between 22% and 25%, which is then fed into a reactor loading hopper. There, sodium chloride, sulfuric acid, and optionally additional oxidizing agents are dosed in a fractional and sequential manner. The method includes a subsequent stage of agglomeration and static chemical curing in heaps with a resting period of 15 to 60 days for sulfides and 1 to 15 days for oxides.After settling, the material is washed and repulped with acid raffinate to a solids density of 30% to 40% in agitators with controlled residence times of up to 120 minutes. The pulp is then sent to a classifier system coupled with hydrocyclones, where the coarse sand fraction of the underflow is discharged semi-dry, and the fine slime fraction of the overflow feeds a clarifier to obtain a solids-free, rich solution (PLS). The thick underflow is then directed to a filter press for the recovery of any remaining impregnated PLS. This system eliminates froth flotation circuits, reduces energy consumption in milling, and optimizes mass transfer by eliminating losses due to passivation.

The invention discloses a modified nano silver sulfide assisted hermetia illucens sludge treatment method and application, and relates to the technical field of environmental protection. According to the sludge treatment method of adding the modified nano silver sulfide into the premixed matrix and inoculating the hermetia illucens larvae, sludge dry basis reduction is realized in a short time, the treatment period is shortened, the volume of a pile is compressed due to accelerated decomposition of organic matters and generation of insect sand, the occupied field and the pile turning energy consumption are reduced, and the cost is reduced. Efficient treatment of municipal sludge, remarkable reduction and volume compression are met; silver ions (Ag < + >) are continuously released through modified nano silver sulfide by means of a chitosan negative charge shell layer, common pathogenic bacteria in sludge are rapidly inactivated in the early stage of composting, heavy metal elements such as cadmium, lead, arsenic and mercury in treated insect sand are all lower than the national standard, secondary disinfection or chemical stabilization treatment is not needed, agricultural safety application is directly met, and the method is suitable for industrial production. The closed loop of'sludge-insect sand-farmland 'is realized, and good social, environmental and economic benefits are achieved.

The invention discloses a treatment method of high-salt and high-COD silver powder wastewater. The treatment method comprises the following steps: step 1, storing silver powder wastewater; step 2, neutralizing caustic soda flakes; step 3, sulfuration and silver deposition; step 4, carrying out nanofiltration to remove PVP (Polyvinyl Pyrrolidone); step 5, MVR simulation evaporation; step 6, carrying out ozone catalytic oxidation on COD; step 7, reverse osmosis separation and impurity removal; and step 8, sludge dewatering. After the wastewater is treated by the method, the water quality can reach the primary standard of Integrated Wastewater Discharge Standard, the indirect discharge standard of Inorganic Chemical Industrial Pollutant Discharge Standard and the like. According to the method, PVP is removed at the front end of the evaporation process, the evaporation efficiency of the MVR evaporator and the operation stability of a wastewater system can be improved, and the silver sulfide product can be efficiently recycled. According to the method, the environmental protection requirement and the economic requirement are met, and resource utilization of silver in the silver powder wastewater is achieved on the basis of guaranteeing stable operation of a wastewater system.

The invention provides a cubic-phase silver sulfide-based thermoelectric material and a preparation method and application thereof, and belongs to the technical field of thermoelectric materials. The chemical formula of the thermoelectric material is Ag < 2-x > S < 0.5 > Se < 0.25 > Te < 0.25 >, wherein 0 lt; xlt; and 0.06 part. According to the invention, on the basis of the existing cubic phase silver sulfide-based thermoelectric material Ag2S0. 5Se0. 25Te0. 25, collaborative optimization of thermal and electrical properties of the material is realized by introducing silver vacancies. The room temperature thermoelectric figure of merit of the optimal sample Ag1, 96S < 0.5 > Se < 0.25 > Te < 0.25 > reaches 0.43 and is improved by 8 times compared with that of Ag2S < 0.5 > Se < 0.25 > Te < 0.25 >. Compared with the prior art, the thermoelectric performance of the obtained thermoelectric material is obviously improved. And elements required for material preparation are rich in reserves and low in price, the preparation process is simple, and large-scale production and commercial application are facilitated.

The present invention relates to a thin-film photovoltaic module with a silver sulfide coating, including a glass substrate. A back-contact layer, an absorber layer and a front electrode layer are sequentially stacked on the glass substrate. The top surface of the front electrode layer is coated with a metal grid matching the front electrode layer, the metal grid is made of silver-containing paste, and the surface of the metal grid is covered by a black silver sulfide coating. According to the present invention, by forming the black silver sulfide coating on the surface of the metal grid, the optical reflection of the metal grid is reduced, so that the reflectivity of the metal grid is decreased, and as a result, the brightness of photovoltaic circuits and modules with the metal grid is decreased, improving the appearance.

The invention relates to the field of functional materials, in particular to a silver sulfide composite photocatalyst based on indium tin sulfide surface modification and a preparation method thereof.The preparation method comprises the steps that Ag2S nanoparticles are prepared through a two-step hydrothermal method, silver nitrate is dissolved in ultrapure water, TAA is added after magnetic stirring, a hydrothermal reaction is conducted for 3-12 h, precipitates are washed three times through ultrapure water and three times through ethyl alcohol respectively, and normal-pressure drying is conducted for 3-24 h; and lamellar SnIn4S8 is grown on the surface of the SnIn4S8 in situ to form a heterojunction, namely an aqueous solution of Sn < 4 + > and acetic acid is prepared, Ag2S nanoparticles are added for ultrasonic treatment for 10-30 min, TAA is supplemented, hydrothermal treatment is performed for 3-6 h, and centrifugal collection is performed at the speed of 8000-10000 rpm. According to the method, the problems of high carrier recombination rate and insufficient visible light utilization of traditional photocatalysts such as TiO2g-C3N4 are solved, the efficiency retention rate is high after five cycles, XRD (X-Ray Diffraction) has no impurity peak, and the method is suitable for tetracycline antibiotic pollution treatment in water and has wide application prospects.

A low insertion force contact includes a conductive base layer that extends to a mating end, the mating end including a mating interface configured to mate electrically with a mating contact. A silver coating is provided on the conductive base layer. The silver coating is provided at the mating end. A silver sulfide surface layer forms a solid lubricant directly on the silver coating. The silver sulfide surface layer forms a thin film that defines a surface of the low insertion force contact having a controlled thickness at the mating interface.

The application discloses an electrochemical method for high-selectivity detection of hydrogen sulfide in a living body by using a nano-silver carbon fiber microelectrode pretreated by sodium sulfide. The application discloses an electrochemical method for high-selectivity detection of hydrogen sulfide in a brain nervous system. The method comprises the following steps: silver nano-particles are electrodeposited on the surface of a carbon fiber microelectrode by using an electrodeposition method; the electrode is pretreated in a sodium sulfide solution, so that a silver sulfide film is generated on the surface of the electrode, the surface of the microelectrode is regulated, and the purpose of high-selectivity detection of hydrogen sulfide in a living body is achieved. Hydrogen sulfide is combined with silver nano-particles to form silver sulfide which is deposited on the surface of the electrode to cause a change in the potential of the electrode. The change in the potential in the reaction process is monitored in real time by using an open circuit potential method, so that the change in the concentration of hydrogen sulfide can be reflected. Thus, the method can realize high-selectivity detection of hydrogen sulfide in a condition closest to physiological conditions.

Disclosed herein is a porous substrate having silver and optionally silver oxide and a silver sulfide coating. Also disclosed herein is a battery having a cathode, an anode, and a separator between the cathode and the anode. The cathode includes a substrate having silver and optionally silver oxide and a silver sulfide coating. Also disclosed herein is a method of submerging a substrate having silver and optionally silver oxide in a solution of elemental sulfur in dimethyl sulfoxide to form silver sulfide on the surface of the substrate.

The invention belongs to the technical field of material chemistry, and discloses a preparation method of bismuth-doped silver sulfide quantum dots and a photoelectronic device. The preparation method comprises the following steps: (1) dissolving silver iodide into a short-chain organic amine solution to form a solution A; (2) dissolving N, N-diphenylthiourea and bismuth iodide into N, N-dimethylformamide to form a solution B; and (3) under the condition of normal temperature, dropwise adding the solution A into the solution B, and stirring to prepare the bismuth-doped silver sulfide quantum dot. The bismuth-doped silver sulfide colloidal quantum dots can be prepared under the condition of normal temperature; the preparation method is simple in operation and convenient in product post-treatment, the obtained product can be directly used for film formation, and an environment-friendly optoelectronic device based on the silver sulfide colloid quantum dots can be conveniently constructed.

The invention discloses a composite solid electrolyte, a battery cell, a single battery and electric equipment. The composite solid electrolyte is prepared by co-doping silver sulfide and sulfide electrolyte. In the charging process, silver ions in the composite solid electrolyte are subjected to electrochemical dissolution, and nanoscale lithium-loving silver seeds are formed along the grain boundary and pores capable of conducting electron transfer. These silver seeds are alloyed with the lithium, inducing uniform electroplating of the lithium therebelow and returning to the electrolyte layer upon lithium exfoliation to improve reversibility during cycling.

The invention provides a method for separating and recovering trace silver in sintered ash, which comprises the following steps: obtaining a mixed solution containing sintered ash, a sodium thiosulfate solution and a cuprous reagent, sequentially carrying out heating leaching and solid-liquid separation on the mixed solution, and collecting a liquid phase to obtain a silver-containing leaching solution; wherein the molar concentration of the cuprous reagent in the mixed solution is 0.003 mol / L to 0.005 mol / L or is not lower than 0.04 mol / L; mixing the leaching solution with a first precipitant, carrying out first precipitation reaction and solid-liquid separation, and collecting a liquid phase to obtain a silver-containing purified solution; and mixing the silver-containing purified liquid with a second precipitant, carrying out a second precipitation reaction, carrying out solid-liquid separation, and collecting a solid phase to obtain silver sulfide. The method is easy and convenient to operate and environmentally friendly, the silver recovery efficiency is remarkably improved, a new technical approach is provided for recovering silver from industrial waste, and the method has important significance on sustainable utilization of resources.

The invention belongs to the technical field of chemical materials, and discloses a silver modified bismuthene core-shell material, a silver sulfide modified bismuthene core-shell material and a preparation method thereof. The preparation method of the silver-modified bismuthene core-shell material comprises the following steps: preparing a non-aqueous composite electrolyte; assembling an electrochemical stripping system; performing electrochemical stripping and in-situ coating; and separating and washing the product. The preparation method of the silver sulfide modified bismuthene core-shell material comprises the following steps: dispersion treatment; preparing a sulfur source; performing in-situ transformation; and separating the product. According to the invention, unique metal-semiconductor heterojunction and semiconductor-semiconductor heterojunction structures are constructed, and the method has excellent interface bonding and stability, is a green and efficient one-pot preparation process, and is suitable for large-scale industrial production.

The invention relates to the field of critical temperature thermistor materials, and discloses a method for regulating and controlling the phase change temperature of an Ag2S semiconductor through Te solid solution, the phase change temperature is regulated and controlled by regulating and controlling the Te solid solution amount in the Ag2S semiconductor, and the linear regulation relation between the phase change temperature and the Te solid solution amount is determined. On the basis, in the phase change process of monoclinic phase-cubic phase of the Ag2S-based semiconductor after solid solution of Te, the resistivity can be sharply reduced by about 2 orders of magnitude only by increasing the temperature by 3K, so that the Ag2S-based semiconductor can be applied as an excellent critical temperature thermistor material. According to the invention, the technical problem that the phase change temperature of the current silver sulfide material is too high and cannot be flexibly changed to adapt to different applications is solved, and the application blank of the silver sulfide material in the field of critical temperature thermistors is filled.

The invention discloses an efficient active oxygen free radical generation method based on silver sulfide quantum dots and application of the efficient active oxygen free radical generation method, and belongs to the technical field of nano catalysis. According to the method, Ag2S quantum dots are added into water or an H2O2 aqueous solution to be mixed and react, active oxygen free radicals OH are obtained, and the principle of the method is as follows: Ag2S QDs and the aqueous solution form a solid-liquid interface, after interface contact is enhanced through vortex or ultrasound, water molecules and hydroxyl ions are induced to lose electrons on the interface to form OH, and the OH is separated from the solid-liquid interface. Meanwhile, Ag2S QDs capture electrons to form a negatively-charged excited state (Ag2S), H2O2 serves as a reaction substrate, electrons are obtained from the negatively-charged Ag2S, and OH is further generated. The limitation of a traditional catalytic system is broken through, efficient generation of active oxygen under a solid-liquid interface is achieved, the rapid degradation capacity on organic pollutants (such as dye and pesticide) is shown, and the potential application value in medicine preparation is achieved.