Abstract: This invention relates to a process for the phase-controlled synthesis of ternary and quaternary mixed-metal sulfide nanoparticles by reacting soft metal ions with hard metal ions in a high-boiling organic solvent in the presence of a complexing and activating ligands to control the reactivity of the metal ions. Ternary and quaternary mixed metal sulfides nanoparticles of copper, sulfur, and iron, aluminum, tin, and silicon are preferred. This invention also relates to the phase controlled preparation of polymorphs of bornite nanoparticles and the phase controlled preparation of stabilized ?- and ?-chalconite nanoparticles.

Abstract: The present invention relates to a synthesis method for unsupported and supported ruthenium base (RuS2) catalysts from a ruthenium complex precursor, which is decomposed and activated by a simple activation process; these steps provide a catalyst with very high catalytic activity, in addition the incorporation of ruthenium complex precursor to a support by methods of incipient and wet impregnating is described; the obtained catalytic activities in this invention are in the order of 100 times the molybdenum sulfide catalyst without support and without promoter, 14 times the industrial supported catalyst, and 5 times the activity of the currently most active commercial unsupported catalyst.

Abstract: A method of manufacturing a quantum dot, the method including: mixing of a Group II precursor and a Group III precursor in a solvent to prepare a first mixture; heating the first mixture at a temperature of about 200° C. to about 350° C.; adding a Group V precursor and a Group VI precursor to the first mixture while maintaining the first mixture at the temperature of about 200° C. to about 350° C. to prepare a second mixture; and maintaining the second mixture at the temperature of about 200° C. to about 350° C. to form a quantum dot.

Abstract: A method of synthesizing pyrite nanocrystals is disclosed which in one embodiment includes forming a solution of iron (III) diethyl dithiophosphate and tetra-alkyl-ammonium halide in water. The solution is heated under pressure. Pyrite nanocrystal particles are then recovered from the solution.

Abstract: A method of producing a MoS2 catalyst. The method begins by the decomposition of ammonium tetrathiomolybdate in an organic solvent. This decomposition is done in the presence of a solution comprising: a solvent and a promoter, and done under gaseous pressure.

Abstract: The present invention relates to amorphous transition metal sulphides as electrocatalysts for hydrogen production from water or aqueous solutions and use thereof in electrodes and electrolysers.

Abstract: Toxic substances such as heavy metals are extracted from a medium using a sorbent composition. The sorbent composition is derived by sulfidation of red mud, which contains hydrated ferric oxides derived from the Bayer processing of bauxite ores. Exemplary sulfidizing compounds are H2S, Na2S, K2S, (NH4)2S, and CaSx. The sulfur content typically is from about 0.2 to about 10% above the residual sulfur in the red mud. Sulfidized red mud is an improved sorbent compared to red mud for most of the heavy metals tested (Hg, Cr, Pb, Cu, Zn, Cd, Se, Th, and U). Unlike red mud, sulfidized red mud does not leach naturally contained metals. Sulfidized red mud also prevents leaching of metals when mixed with red mud. Mixtures of sulfidized red mud and red mud are more effective for sorbing other ions, such as As, Co, Mn, and Sr, than sulfidized red mud alone.

Abstract: The present invention provides a production process of a metal sulfide, which includes placing a metal component and sulfur in a conductive container, and applying a pulsed direct current to the container in a non-oxidizing atmosphere to cause the metal component to react with sulfur, and also provides a metal sulfide obtained by the process and represented by a composition formula: MSx, wherein M is at least one member selected from the group consisting of Ni, Cu, Fe, and Co, and 1<x?2. The present invention is capable of easily producing a metal sulfide with a high proportion of sulfur atoms, which is expected to exhibit excellent properties as a positive-electrode active material for a high capacity lithium secondary battery.

Abstract: A method for increasing the ZT of a material, involves creating a reaction cell including a material in a pressure-transmitting medium, exposing the reaction cell to elevated pressure and elevated temperature for a time sufficient to increase the ZT of the material, and recovering the material with an increased ZT.

Abstract: A process for producing calcine products includes dead roasting a metal sulfide concentrate having a low sulfur content. The concentrate is roasted in a circulating fluidized bed at a temperature of about 950 to 1050° C. A waste gas of the fluidized bed is passed through at least one of a recuperator and a Venturi drier so as to respectively provide at least one of a preheating of at least a portion of air fluidizing the fluidized bed and a drying of at least a portion of the concentrate to be roasted. The calcine product obtained in the fluidized bed with a sulfur content of less than 1 wt-% is provided for further processing.

Abstract: A method for making a chalcopyrite-type compound includes reacting a reaction mixture in a solvent under reflux condition to form the chalcopyrite-type compound. The reaction mixture includes at least one first compound and at least one second compound. The first compound contains M1 and A. The second compound contains M2 and A. M1 is selected from Cu, Au, Ag, Na, Li and K, M2 is selected from In, Ga, Al, Ti, Zn, Cd, Sn, Mg, and combinations thereof, and A is selected from S, Se, Te, and combinations thereof.

Abstract: The present invention provides a method of exfoliating a layered material (e.g., transition metal dichalcogenide) to produce nano-scaled platelets having a thickness smaller than 100 nm, typically smaller than 10 nm. The method comprises (a) dispersing particles of a non-graphite laminar compound in a liquid medium containing therein a surfactant or dispersing agent to obtain a stable suspension or slurry; and (b) exposing the suspension or slurry to ultrasonic waves at an energy level for a sufficient length of time to produce separated nano-scaled platelets. The nano-scaled platelets are candidate reinforcement fillers for polymer nanocomposites.

Abstract: In accordance with various embodiments, there are nanostructured materials including WS2 nanostructures and composites of WS2 nanostructures and other materials and methods for synthesizing nanostructured materials. The method can include providing a plurality of precursor materials, wherein each of the plurality of precursor materials can include a tungsten reactant. The method can also include flowing, for a reaction time, a substantially continuous stream of carbon disulfide (CS2) vapor in a carrier gas over the plurality of precursor materials at a temperature in the range of about 700° C. to about 1000 C, wherein the reaction time is sufficient to permit the tungsten reactant to react with carbon disulfide to form a plurality of tungsten disulfide (WS2) nanostructures.

Abstract: Molybdenum disulfide powders include substantially spherically-shaped particles of molybdenum disulfide that are formed from agglomerations of generally flake-like sub-particles. The molybdenum disulfide powders are flowable and exhibit uniform densities. Methods for producing a molybdenum disulfide powder may include the steps of: Providing a supply of molybdenum disulfide precursor material; providing a supply of a liquid; providing a supply of a binder; combining the molybdenum disulfide precursor material with the liquid and the binder to form a slurry; feeding the slurry into a stream of hot gas; and recovering the molybdenum disulfide powder, the molybdenum disulfide powder including substantially spherically-shaped particles of molybdenum disulfide formed from agglomerations of generally flake-like sub-particles.

Abstract: A process for the recovery of a metal sulfide from a metal ion containing solution, including the steps of: a) providing a slurry containing seed panicles of said metal sulfide; h) adding a sulfide ion containing solution to said slurry to form an activated seed slurry; c) mixing said activated seed slurry with said metal ion containing solution to thereby form a metal sulfide precipitate; and d) recovering said metal sulfide precipitate.

Abstract: A method for obtaining a promoted molybdenum sulfide catalyst and a promoted molybdenum sulfide added with a nanometric additive. The obtained catalyst exhibits an improved catalytic activity in hydrotreatment reactions, such as hydrodesulfurization, hydrodenitrogenation, and hydrogenation. The invention presents as an advantage, in addition to a low cost composition by their transition metals content, the activation of thiosalts precursor using an environmentally friendly atmosphere.

Abstract: The present invention is generally directed to a method of making chalcogenide glasses including holding the melt in a vertical furnace to promote homogenization and mixing; slow cooling the melt at less than 10° C. per minute; and sequentially quenching the melt from the top down in a controlled manner. Additionally, the present invention provides for the materials produced by such method. The present invention is also directed to a process for removing oxygen and hydrogen impurities from chalcogenide glass components using dynamic distillation.

Abstract: A method for making a chalcopyrite-type compound includes: reacting a reaction mixture in a first solvent under reflux condition to form the chalcopyrite-type compound containing M1, M2, and A, in which M1 is selected from Cu, Au, Ag, Na, Li, and K, M2 is selected from In, Ga, Al, Ti, Zn, Cd, Sn, Mg, and combinations thereof, and A is selected from S, Se, Te, and combinations thereof; filtering the reaction mixture to obtain a crude cake; mixing the crude cake with a second solvent and a powder of a post-treatment material selected from S, Se, Te, and combinations thereof; and heating the mixture under reflux condition.

Abstract: A molybdenum disulfide powder product produced by jet milling a molybdenum disulfide precursor material and substantially continuously combining newly sized-reduced particles with oil to produce said molybdenum disulfide powder product, said molybdenum disulfide powder product having a D50 particle size of less than 4 ?m and an acid number that is less than about 0.5 mg KOH/g. A method for producing powder product includes the steps of: Providing a supply of a precursor powder material; accelerating particles of the precursor powder material by combining them with a flow of gas; confining the accelerated particles in a milling chamber so that they collide with one another to effect a size reduction; and coating newly exposed surfaces of size-reduced particles with oil.

Abstract: The present invention relates to diagnostic and therapeutic nanoparticles. More particularly, the present invention relates to creating a copper (Cu)-based nanoparticle and a method for making the same. The Cu-based nanoparticles can further be incorporated with additional therapeutic or diagnostic compounds and used for the diagnosis and treatment of tumors.

Abstract: A method for making metal sulfide nanocrystals is provided. First, some metal salt powders are provided in a container. Second, superfluous mercaptan is added into the container. Then the superfluous mercaptan and the metal salt are stirred uniformly to get a precursor mixture and the precursor mixture is heated to get the metal sulfide nanocrystals. Lastly, the metal sulfide nanocrystals are separated and washed.

Abstract: A sorbent, suitable for removing heavy metals, including mercury, from fluids containing hydrogen and/or carbon monoxide at temperatures up to 550° C., in the form of a shaped unit comprising one or more mixed-valency metal sulphides of vanadium, chromium, manganese, iron, cobalt or nickel.

Abstract: Cathode active materials, and cathodes and magnesium batteries including the cathode active materials. The cathode active materials, and cathodes and magnesium batteries include a metal sulfide-based nanosheet.

Abstract: The present invention relates to a process for dissolving metals in perhalide containing ionic liquids, and to the extraction of metals from mineral ores; the remediation of materials contaminated with heavy, toxic or radioactive metals; and to the removal of heavy and toxic metals from hydrocarbon streams.

Abstract: A method of producing a MoS2 catalyst. The method begins by the decomposition of ammonium tetrathiomolybdate in an organic solvent. This decomposition is done in the presence of a solution comprising: a solvent and a promoter, and done under gaseous pressure.

Abstract: The present invention relates to a porous copper sulfide nano/micro hollow sphere and a method for preparing the same. The porous copper sulfide nano/micro hollow sphere of the present invention has plural through holes and a hollow structure so as to increase the reactive area thereof. In particular, the porous copper sulfide nano/micro hollow sphere can be applied in a solar cell to enhance a photoelectric effect.

Abstract: A non-sintered structure. The non-sintered structure includes a first non-sintered nanocrystal layer, and a second non-sintered nanocrystal layer wherein the first layer and the second layer are configured to interact electronically.

Abstract: The present invention relates to a porous copper sulfide nano/micro hollow sphere and a method for preparing the same. The porous copper sulfide nano/micro hollow sphere of the present invention has plural through holes and a hollow structure so as to increase the reactive area thereof. In particular, the porous copper sulfide nano/micro hollow sphere can be applied in a solar cell to enhance a photoelectric effect.

Abstract: A method is provided of producing inorganic semiconducting nanoparticles having a stable surface. The method comprises providing an inorganic bulk semiconductor material, such as silicon or germanium, and milling the bulk semiconductor material in the presence of a selected reducing agent. The reducing agent acts to chemically reduce oxides of one or more component elements of the semiconductor material, or prevent the formation of such oxides by being preferentially oxidised, thereby to provide semiconducting nanoparticles having a stable surface which allows electrical contact between the nanoparticles. The milling may take place in a mill in which the milling media and/or one or more components of the mill comprise the selected reducing agent.

Abstract: The present invention provides a method of exfoliating a layered material (e.g., transition metal dichalcogenide) to produce nano-scaled platelets having a thickness smaller than 100 nm, typically smaller than 10 nm. The method comprises (a) dispersing particles of a non-graphite laminar compound in a liquid medium containing therein a surfactant or dispersing agent to obtain a stable suspension or slurry; and (b) exposing the suspension or slurry to ultrasonic waves at an energy level for a sufficient length of time to produce separated nano-scaled platelets. The nano-scaled platelets are candidate reinforcement fillers for polymer nanocomposites.

Abstract: The invention relates to a composition capable of trapping hydrogen comprising: (a) at least one mineral compound of formula (I) below: MX(OH)??(I) in which: M represents a divalent transition element; O represents an oxygen atom; X represents an atom chosen from S, Se, Te, Po; and H represents a hydrogen atom; and (b) at least one nitrate salt of formula (II) below: ZNO3??(II) in which Z is a monovalent cation. Use of these compositions either in pulverulent form for trapping gaseous hydrogen by direct interaction, or in the form of an adjuvant in a containment material for, for example, trapping hydrogen released by radiolysis in radioactive waste packages.

Abstract: The present disclosure relates to a catalyst including platinum phosphide having a cubic structure, a method of making the catalyst, and a fuel cell utilizing the catalyst. The present disclosure also relates to method of making electrical power utilizing a PEMFC incorporating the catalyst. Also disclosed herein is a catalyst including a platinum complex wherein platinum is complexed with a nonmetal or metalloid. The catalyst with the platinum complex can exhibit good electro-chemically active properties.

Abstract: A method for making metal sulfide nanocrystals is provided. First, some metal salt powders are provided in a container. Second, superfluous mercaptan is added into the container. Then the superfluous mercaptan and the metal salt are stirred uniformly to get a precursor mixture and the precursor mixture is heated to get the metal sulfide nanocrystals. Lastly, the metal sulfide nanocrystals are separated and washed.

Abstract: An economic, direct synthetic method for producing water soluble QDs that are ready for bioconjugation is provided. The method can produce aqueous QDs with emission wavelengths varying from 400 nm to 700 nm. Highly luminescent metal sulfide (MS) QDs are produced via an aqueous synthesis route. MS QDs are capped with thiol-containing charged molecules in a single step. The resultant MS QDs exhibit the distinctive excitonic photoluminescence desired of QDs and can be fabricated to avoid undesirable broadband emissions at higher wavelengths. This provides a significant improvement over the present complex and expensive commercial processes for the production of QDs. The aqueous QDs are stable in biological fluids over a long period of time. In addition, nontoxic ZnS QDs have been produced with good photoluminescence properties by refluxing the ZnS QD suspensions over a period of time.

Abstract: A method of synthesizing pyrite nanocrystals is disclosed which in one embodiment includes forming a solution of iron (III) diethyl dithiophosphate and tetra-alkyl-ammonium halide in water. The solution is heated under pressure. Pyrite nanocrystal particles are then recovered from the solution.

Abstract: The invention relates to a sulphide catalyst for electrochemical reduction of oxygen particularly stable in chemically aggressive environments such as chlorinated hydrochloric acid. The catalyst of the invention comprises a noble metal sulphide single crystalline phase supported on a conductive carbon essentially free of zerovalent metal and of metal oxide phases, obtainable by reduction of metal precursor salts and thio-precursors with a borohydride or other strong reducing agent.

Abstract: The present invention relates to a method of recovering rhenium (Re) and other metals from Re-bearing materials.

Abstract: Disclosed are inorganic nanoparticles comprising a body comprising cadmium and/or zinc crystallized with selenium, sulfur, and/or tellurium; a multiplicity of phosphonic acid ligands comprising at least about 20% of the total surface ligand coverage; wherein the nanocrystal is capable of absorbing energy from a first electromagnetic region and capable of emitting light in a second electromagnetic region, wherein the maximum absorbance wavelength of the first electromagnetic region is different from the maximum emission wavelength of the second electromagnetic region, thereby providing a Stokes shift of at least about 20 nm, wherein the second electromagnetic region comprises an at least about 100 nm wide band of wavelengths, and wherein the nanoparticle exhibits has a quantum yield of at least about 10%. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.

Abstract: A method of synthesizing metal chalcogenide nanocrystals involving the steps of combining an organodichalcogenide, a metal salt and a ligand compound to form a mixture; degassing the mixture to remove air and water from the mixture; heating the mixture at a temperature below the decomposition temperature of the organodichalcogenide for a period of time sufficient to form a metal chalcogenide nanocrystal.

Abstract: The object of the invention is a process for the synthesis of nanotubes of transition metal dichalcogenides, of fullerene-like nanostructures of transition metal dichalcogenides, of nanotubes of transition metal dichalcogenides, filled with fullerene-like nanostructures of transition metal dichalcogenides, of quasi one-dimensional structures (nanowires, microwires and ribbons) of transition metal oxides and of quasi one-dimensional structures of transition metal dichalcogenides, consisting of fine crystallites of transition metal dichalcogenides. The process is characterized in that the synthesis occurs by the chemical transformation of quasi one-dimensional compounds with a sub-micron diameter, described by the formula M6CyHz, 8.2<y+z?10, where M is a transition metal (Mo, W, Ta, Nb), C is a chalcogen (S, Se, Te), H is a halogen (I).

Abstract: Single source precursors are subjected to carbon dioxide to form particles of material. The carbon dioxide may be in a supercritical state. Single source precursors also may be subjected to supercritical fluids other than supercritical carbon dioxide to form particles of material. The methods may be used to form nanoparticles. In some embodiments, the methods are used to form chalcopyrite materials. Devices such as, for example, semiconductor devices may be fabricated that include such particles. Methods of forming semiconductor devices include subjecting single source precursors to carbon dioxide to form particles of semiconductor material, and establishing electrical contact between the particles and an electrode.

Abstract: A process for producing calcine products includes dead roasting a metal sulfide concentrate having a low sulfur content. The concentrate is roasted in a circulating fluidized bed at a temperature of about 950 to 1050° C. A waste gas of the fluidized bed is passed through at least one of a recuperator and a Venturi drier so as to respectively provide at least one of a preheating of at least a portion of air fluidizing the fluidized bed and a drying of at least a portion of the concentrate to be roasted. The calcine product obtained in the fluidized bed with a sulfur content of less than 1 wt-% is provided for further processing.

Abstract: The present invention provides a method of producing a crystalline metal sulfide nanostructure. The method comprising: providing a metal precursor solution and providing a sulfur precursor solution; placing a porous membrane between the metal precursor solution and the sulfur precursor solution, wherein metal cations of the metal precursor solution and sulfur ions of the sulfur precursor solution react, thereby producing a crystalline metal sulfide nanostructure, wherein the metal is a transitional metal or a Group IV metal.

Abstract: A heat-reactive resist material of the invention is characterized in that the boiling point of the fluoride of the element is 200° C. or more. By this means, it is possible to achieve the heat-reactive resist material having high resistance to dry etching using fluorocarbons to form a pattern with the deep groove depth.

Abstract: A method of sequestering a multi-element gas emitted by an industrial plant is described herein, the method comprising: contacting a solution, including a first reactant comprising a multi-element gas emitted by an industrial plant and at least one gas absorber comprising nitrogen, for example ammonia or an amine, with a solid, including a second reactant, under conditions that promote a reaction between the first reactant and the second reactant to provide a first product, which incorporates one or more elements of the multi-element gas, thereby sequestering the multi-element gas.

Abstract: There is disclosed a process of making nano-sized or micro-sized precipitate particles. The process comprising the steps of mixing, in a reaction zone, a metal salt solution with a precipitant solution to form a precipitate, said precipitate being at least one of a metal chalcogenide, metal hydroxide and metal oxide; and applying a shear force to said mixing solutions in said reaction zone during said mixing step, wherein said shear force and the conditions within said reaction zone form said nano-sized or micro-sized precipitate particles.

Abstract: In a method for separating rich ore particles from agglomerates which contain said rich ore particles and magnetizable particles attached thereto, especially Fe3O4, in the course of a process for obtaining rich ore from crude ore, in which agglomerates the rich ore particle and the magnetizable particle are bonded by organic molecular chains, the agglomerates are contained in a suspension containing a carrier fluid and are broken up by an input of mechanical energy so that an agent contained in the suspension and decomposing the exposed, hydrophobic molecular chains can act upon the molecular chains. The Fe-containing oxide components are separated from the suspension in a magnetic separation process.

Abstract: An economic, direct synthetic method for producing water soluble QDs that are ready for bioconjugation is provided. The method can produce aqueous QDs with emission wavelengths varying from 400 nm to 700 nm. Highly luminescent metal sulfide (MS) QDs are produced via an aqueous synthesis route. MS QDs are capped with thiol-containing charged molecules in a single step. The resultant MS QDs exhibit the distinctive excitonic photoluminescence desired of QDs and can be fabricated to avoid undesirable broadband emissions at higher wavelengths. This provides a significant improvement over the present complex and expensive commercial processes for the production of QDs. The aqueous QDs are stable in biological fluids over a long period of time. In addition, nontoxic ZnS QDs have been produced with good photoluminescence properties by refluxing the ZnS QD suspensions over a period of time.

Abstract: The separation method for zinc sulfide, in the hydrometallurgical process by a High Pressure Acid Leach for nickel oxide ore comprising leaching and solid/liquid separation step, neutralization step, zinc removal step, and nickel recovery step, which can inhibit clogging of a filter cloth and reduce a frequency of washing operation and replacement operation of a filter cloth by improving filtration performance of zinc sulfide, and inhibit decrease of nickel recovery ratio, in the zinc removal step in which zinc sulfide is formed by adding a sulfurizing agent to the neutralization final liquid containing zinc as well as nickel and cobalt and zinc sulfide is separated to obtain a mother liquid for nickel recovery containing nickel and cobalt. The separation method for zinc sulfide of the present invention is characterized in that in the above-described neutralization step, the leach residue is added to the leach liquor, and pH of the neutralization final liquid is adjusted so as to fall to the range from 3.

Abstract: The present invention provides a process for obtaining fullerene-like metal chalcogenide nanoparticles, comprising feeding a metal precursor selected from metal halide, metal carbonyl, organo-metallic compound and metal oxyhalide vapor into a reaction chamber towards a reaction zone to interact with a flow of at least one chalcogen material in gas phase, the temperature conditions in said reaction zone being such to enable the formation of the fullerene-like metal chalcogenide nanoparticles product. The present invention further provides novel IF metal chalcogenides nanoparticles with spherical shape and optionally having a very small or no hollow core exhibiting excellent tribological behaviour. The present invention further provides an apparatus for preparing various IF nanostructures.