19 results about "Silver sulfide" patented technology

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.

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 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.

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.

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 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 application discloses a modified nano-silver sulfide auxiliary black soldier fly sludge treatment method and application, and relates to the technical field of environmental protection.The application realizes sludge dry base reduction in a short time, shortens a treatment period, and the pile volume is also compressed due to accelerated decomposition of organic matter and formation of worm sand, thereby reducing site occupation and turning pile energy consumption, meeting efficient disposal of municipal sludge, significant reduction and volume compression; through the modified nano-silver sulfide, silver ions (Ag + ) are continuously released by means of a chitosan negative charge shell, common pathogenic bacteria in sludge are rapidly inactivated in the early stage of composting, and heavy metal elements such as cadmium, lead, arsenic and mercury in the worm sand after treatment are all lower than national standards, so that secondary disinfection or chemical stabilization treatment is not needed, direct agricultural safety application is met, a "sludge-worm sand-farmland" closed loop is realized, and good social, environmental and economic benefits are achieved.

This invention discloses a controllable preparation method for core-shell structured silver sulfide-iron carbide heterostructures using a seed-growth chemical liquid-phase method. Silver sulfide quantum dots, an organometallic compound of iron, and ammonium bromide salt are dissolved in a high-boiling-point organic solvent and subjected to a high-temperature carbonization reaction. The core-shell structured silver sulfide-iron carbide heterostructure is then precipitated via a polar organic liquid. This material exhibits ferromagnetism with a high maximum magnetic saturation intensity. Simultaneously, these heterostructured nanoparticles exhibit excellent near-infrared II luminescence properties. This invention prepares high-quality silver sulfide-iron carbide heterostructured nanoparticles using silver sulfide quantum dots, an organometallic compound of iron as a precursor, and an ammonium chloride salt. Water-soluble silver sulfide-iron carbide heterostructured nanoparticles are obtained through water-soluble modification with distearate phosphatidylethanolamine-polyethylene glycol. These nanoparticles have potential applications in optics, biomedicine, environmental science, materials science, catalysis, energy, and magnetic storage. The preparation method is simple and easy to implement, suitable for industrial production.

This invention belongs to the technical field of solid electrolytes and discloses a method for preparing a liquid-phase doped silver-germanium sulfide solid electrolyte with high ionic conductivity. The method includes: 1) dispersing lithium sulfide and phosphorus pentasulfide in an organic solvent, heating and stirring to obtain a precursor solution containing Li3PS4; 2) mixing lithium iodide, sulfur powder, and additives with the precursor solution, heating and stirring to remove the organic solvent, and obtaining a powder; 3) sintering the powder under a protective atmosphere to obtain a silver-germanium sulfide solid electrolyte; the additives are one or more of SiS2, GeS2, SnS2, As2S3, and Sb2S3. This invention is simple, and the prepared silver-germanium sulfide electrolyte undergoes elemental doping during thermal crystallization, improving the electrolyte's ionic conductivity and air stability. This method is suitable for industrial production.

The invention belongs to the technical field of thermoelectric materials, and discloses a preparation method of a high-performance silver sulfide-based inorganic plastic thermoelectric composite material, which comprises the following steps: respectively weighing silver, sulfur, selenium and tellurium elementary substance powder according to the nominal chemical dosage ratio of Ag2S1 / 3Se1 / 3Te1 / 3, mixing to obtain mixed powder, and carrying out vacuum melting to obtain an Ag2S1 / 3Se1 / 3Te1 / 3 cast ingot; grinding the cast ingot to obtain Ag2S1 / 3Se1 / 3Te1 / 3 powder; and proportioning the Ag2S1 / 3Se1 / 3Te1 / 3 powder and the raw material constantan fiber, carrying out ball-milling mixing, and then carrying out spark plasma sintering to obtain the silver sulfide-based inorganic plastic thermoelectric material compounded with the constantan fiber. The preparation method is improved, the Ag2S1 / 3Se1 / 3Te1 / 3 matrix is formed through smelting, then the second-phase constantan alloy fiber is introduced through spark plasma sintering, the second-phase constantan alloy is dispersed and distributed in the matrix phase in the form of fiber, and the obtained composite material can effectively solve the problem that in the prior art, the power factor of an Ag2 (S, Se and Te) system material is low.

This invention belongs to the field of geochemistry and discloses an apparatus and method for the conversion of silver sulfide to sulfur hexafluoride for polysulfide isotope determination. The apparatus includes a basic vacuum module, a reaction and extraction module, a purification module, a sample collection module, and a waste gas treatment module. The basic vacuum module provides a high vacuum environment for the system. The reaction and extraction module is used for the silver sulfide fluorination reaction and preliminary extraction of sulfur hexafluoride. The purification module is used for the separation and purification of sulfur hexafluoride. The sample collection module is used for the collection and preservation of purified sulfur hexafluoride. The waste gas treatment module is connected to the reaction and extraction module and includes a fully sealed waste gas absorption tank with an alkali metal hydroxide absorbent inside. Both ends are connected to the vacuum system via valves. This invention enables online chemical absorption of toxic waste gases from fluorination reactions, eliminating the safety hazards of traditional waste gas treatment methods and ensuring the safety and reliability of the sample pretreatment process for polysulfide isotope determination.

The invention discloses a silver sulfide coated sulfur-carbon positive electrode material and a preparation method and application thereof, and the method comprises the following steps: preparing a precursor solution A containing Ag ions; dissolving ammonium sulfide in deionized water to prepare a precursor solution B; dispersing a sulfur-carbon compound in deionized water to prepare a precursor dispersion liquid C; and adding the precursor solution A and the precursor solution B into the precursor dispersion liquid C in an atomizing manner to react, and after the reaction is completed, centrifuging the reaction liquid, precipitating, filtering and drying in vacuum to obtain the composite material. A coating layer is arranged on the surface of the sulfur-carbon positive electrode material, and the coating layer is mainly Ag2S. The material is used as a lithium-sulfur battery positive electrode material, silver sulfide in the material participates in a reaction, the ionic conductivity at a positive electrode interface is remarkably improved, meanwhile, the silver sulfide coating the sulfur surface can react with lithium ions in situ, a layer of nano silver is generated on the sulfur surface, and the interface dynamics of the electrode material is remarkably improved.

This invention discloses a method for recovering silver from waste photovoltaic cells, belonging to the field of non-ferrous metal metallurgy and secondary resource recycling technology. The method includes the following steps: placing the photovoltaic cells in a sulfiding agent and sulfiding them at a sulfidation temperature of 20-400℃ for 0.5-16 hours; followed by vacuum thermal decomposition at a vacuum level of 0.01-100 Pa, a decomposition temperature of 600-1100℃, and a decomposition time of 0.5-8 hours. This application uses a sulfiding agent for selective sulfidation, further enhances the enrichment of silver sulfide through ultrasonic enhancement, and then obtains metallic silver and elemental sulfur through vacuum thermal decomposition. This vacuum thermal decomposition achieves the preparation of silver, ultimately realizing the recovery of metallic silver from photovoltaic modules. Furthermore, the vacuum environment can lower the reaction temperature required for thermal decomposition, ultimately yielding high-purity silver.

The invention discloses a light-driven CeVO4 / Ag2S redox nano shuttle machine as well as a preparation method and application thereof, and belongs to the technical field of nano biological medicines. The nano shuttle machine is of a core-shell structure and comprises a cerium vanadate (CeVO4) core with triple biomimetic catalytic activity of peroxidase, catalase and glutathione peroxidase, a mesoporous silicon dioxide shell layer covering the outer side of the core, and silver sulfide (Ag2S) photo-thermal nano particles modified on the shell layer. Under the irradiation of initial near-infrared light, Ag2S on the surface serves as a photo-thermal engine to generate a local temperature gradient, the nano shuttle machine is driven to generate active thermophoresis propulsive force, and therefore a passive diffusion barrier is broken through to achieve deep penetration of tumor tissue. The penetrated CeVO4 core can efficiently utilize abundant endogenous substrates in a tumor microenvironment to carry out continuous cascade catalysis. According to the invention, a closed-loop system coupling thermophoresis propulsion and self-amplification catalysis is successfully constructed, the dependence of traditional nano-enzyme on continuous external energy input is eliminated, and long-acting and autonomous treatment of deep tumors is realized.

The application discloses a preparation method of a bismuth silver sulfide quantum dot film, the film and an imaging chip, and relates to the technical field of quantum dot films. The method comprises the following steps: performing pretreatment on an original oil-phase solution of bismuth silver sulfide AgBiS2 through an aliphatic mercaptan solution in a liquid phase or a quasi-liquid phase state to obtain a ligand rearranged AgBiS2 quantum dot film; and performing passivation on the ligand rearranged AgBiS2 quantum dot film through aromatic mercaptan with a rigid aromatic structure to obtain a passivated AgBiS2 quantum dot film. Through the pretreatment of the aliphatic mercaptan solution on the original oil-phase solution of bismuth silver sulfide AgBiS2, the monodispersity and spectral stability of the AgBiS2 quantum dots are effectively maintained during the solid-phase passivation of the AgBiS2 quantum dots, and the AgBiS2 quantum dots are further subjected to solid-phase secondary passivation through the aliphatic mercaptan solution, so that a dense cross-linking network is formed between the AgBiS2 quantum dots, and thus the bismuth silver sulfide quantum dot film generated by the method has the characteristics of high mechanical strength, consistent electrical performance and stable interface.

The invention discloses a silver sulfide / bismuth sulfide / tungsten trioxide composite photocatalyst and a preparation method and application thereof.According to the microstructure of the catalyst, a WO3 nanosheet serves as a substrate, a Bi2S3 nanorod grows on the surface of the WO3 nanosheet, the WO3 nanosheet and the Bi2S3 nanorod jointly form a first-stage composite structure, an Ag2S nanostructure is loaded on the first-stage composite structure, and the Ag2S nanostructure is loaded on the first-stage composite structure. The Ag2S nanostructure comprises a rice-grain-shaped structure distributed on the surface of the first-stage composite structure and a nanowire-shaped structure filled in a gap inside the first-stage composite structure. The preparation method comprises a three-step hydrothermal / solvent process, and controllable growth of the structure is realized by controlling the composition of a precursor solution and reaction conditions. According to the composite catalyst, the light response range is expanded to an ultraviolet-visible-near infrared region, the carrier separation efficiency and transmission rate are remarkably improved, the cycling stability is good, and the composite catalyst has wide application prospects in the fields of photocatalytic reduction of pollutants, water photolysis, solar cells and the like.

The application provides a gold-silver alloy nanoparticle and a preparation method and application thereof, and the preparation method comprises the following steps: reacting water, silver sulfide quantum dots and polyvinylpyrrolidone powder at 0 DEG C until the reaction is sufficient, centrifuging, and obtaining a silver sulfide supernatant; mixing chloroauric acid, a sodium citrate solution and a NaOH solution at room temperature until the reaction is sufficient, and obtaining a reaction liquid; mixing the obtained silver sulfide supernatant and the obtained reaction liquid, adding polyvinylpyrrolidone, adding a hydroxylamine hydrochloride solution and a NaOH solution in sequence after reaction, fully reacting, and obtaining gold-silver alloy ions; and purifying the obtained gold-silver alloy ions, so that the gold-silver alloy nanoparticle is obtained. The preparation method adopts an aqueous phase method to synthesize the gold-silver alloy nanoparticle, the synthesis process is simple, green and environment-friendly, and the synthesis means of the gold-silver alloy nanoparticle is enriched; and the gold-silver alloy nanoparticle has potential application in the research of Alzheimer's disease and can effectively inhibit the incorrect folding of A beta 40 protein.

The invention discloses a preparation method of a sulfur-silver-bismuth quantum dot film, the film and an imaging chip thereof, and the method comprises the following steps: carrying out pretreatment on a sulfur-silver-bismuth AgBiS2 original oil phase solution in a liquid phase or quasi-liquid phase state through an aliphatic mercaptan solution to obtain a counterweight rearranged AgBiS2 quantum dot film; the preparation method comprises the following steps: passivating the AgBiS2 quantum dot film of which the counter weight is rearranged by adopting aromatic mercaptan with a rigid aromatic structure, so as to obtain the passivated AgBiS2 quantum dot film. The preparation method comprises the following steps: pretreating an original oil phase solution of sulfur silver bismuth AgBiS2 by using an aliphatic thiol solution, performing solid-phase passivation on the AgBiS2 quantum dots, effectively maintaining the monodispersity and spectral stability of the AgBiS2 quantum dots, and further performing solid-phase secondary passivation by using the aliphatic thiol solution, so that a compact cross-linked network is formed among the AgBiS2 quantum dots, thereby obtaining the solid-phase passivated AgBiS2 quantum dots. Therefore, the sulfur-silver-bismuth quantum dot film generated by the method has the characteristics of high mechanical strength, consistent electrical properties and stable interface.