12results about "Cadmium compounds" patented technology

The application discloses undoped and ion-doped all-inorganic non-lead double-center metal halide materials and preparation and application thereof. The all-inorganic non-lead double-center metal halide materials are synthesized by a solution method in one step, stirring and mixing, and temperature reduction and crystallization, and finally colorless flaky transparent crystals are obtained, and the structural composition of the crystals is A5BB'X8:M, wherein A is an alkali metal ion, B is a divalent metal cation, B' is a monovalent metal cation, X is a halogen ion, A and B' cannot be the same, and M is a doping ion. The preparation method is simple, the metal halide crystal material obtained is environment-friendly, non-toxic, stable, and has high-efficiency visible light wide-spectrum luminescence performance, and has great development potential in the fields of illumination, display, photoelectric detection, solar cells, lasers, sensors, photoelectric catalysis and the like. The application solves the toxicity problem of lead-based perovskite, improves the stability of the new all-inorganic non-lead double-center metal halide through doping, and simultaneously improves the fluorescence performance, and has good application prospect in various fields.

The application relates to an orange fluorescent powder excited by purple light and application, and the chemical formula of the orange fluorescent powder is Zn4CdS5. A Zn-containing compound and a Cd-containing compound are uniformly ground and mixed, are sealed into a vacuum quartz tube for calcination, and the orange fluorescent powder is obtained after cooling, wherein the Zn-containing compound and the Cd-containing compound contain S elements. Compared with the prior art, the orange fluorescent powder prepared by the application has strong emission intensity and the advantages of stable physical and chemical properties, and can be widely matched with commercial purple light LED chips.

The present disclosure relates to a method that includes treating a layer of ZnTe with a metal halide, where the layer has a first grain size between 25 nm and 250 nm before the treating and the layer has a second grain size after the treating that is larger than the first grain size. In some embodiments of the present disclosure, the ZnTe may include at least one of Zn1-wCdwTe, ZnTe1-xSex, Zn1-yCdyTe1-zSez, or a combination thereof and each of w, x, y, and z are independently between 0 and 0.9, inclusively.

The invention relates to the fields of rare earth metal ions, reversed-phase colloid dispersion systems, doped nanocrystals and the like, in particular to a method for realizing rare earth metal ion core-shell doped zinc cadmium sulfide nanocrystals. The preparation method comprises the following steps: mixing aminated poly N-isopropylacrylamide, matrix metal salt, an aqueous solution of first rare earth metal salt and a solvent, and performing ultrasonic crushing to form a water-based nano reactor containing a first rare earth ion doped precursor; the preparation method comprises the following steps: carrying out ultrasonic pulverization on a poly (N-isopropylacrylamide)-polyethylene glycol amino copolymer, a matrix metal salt, an aqueous solution of a second rare earth metal salt and a solvent to form a water-based nano reactor containing a second rare earth metal ion doped precursor; mixing the two nano reactors, and performing high-pressure homogenization and nanocrystallization to form colloid; and adding the colloid into a sulfide aqueous solution, and sintering to obtain the rare earth metal ion core-shell doped nanocrystal. The rare earth metal ion doped nanocrystalline prepared by the method is of a core-shell structure, the diameter is 10-20 nanometers, and the thickness is 2-5 nanometers.

The invention belongs to the technical field of nano functional materials, and particularly discloses a preparation method of a copper nanowire / ZnCdS nanosheet material and photo-thermal conversion, photocatalysis and antibacterial application of the copper nanowire / ZnCdS nanosheet material. According to the preparation method, copper nanowires with defects are prepared through tannic acid, defect sites capture Zn < 2 + > and Cd < 2 + > through electrostatic attraction or coordination, ZnCdS nanosheets are loaded on the surfaces of the copper nanowires, the copper nanowire / ZnCdS nanosheet material is prepared, the high-conductivity copper nanowires and the ZnCds form a large number of interface structures, and the conductivity of the copper nanowires is improved. The photocatalyst has efficient photothermal conversion performance, wide-spectrum photocatalytic activity and a synergistic antibacterial effect, and has the advantages of being simple in preparation process, low in cost, environmentally friendly and the like.

The invention provides a synthesis method of a nano material, a thin film and a photoelectric device. The nanometer material with good particle size consistency can be obtained through the nanometer material synthesis method provided by the invention.

The invention provides a piezoelectric electro-catalytic reforming material as well as a preparation method and application thereof. The piezoelectric electro-catalytic reforming material provided by the invention is formed by alternately arranging sphalerite (ZB) and wurtzite (WZ) sections to form a homojunction, doping an S vacancy twin crystal Zn0. 5Cd0. 5SV solid solution (T-CZSV) material and coupling a photocatalytic material cobalt stannate (Co2SnO4 and CSO); wherein the existence of the homojunction enhances the separation of photo-induced electrons and holes, and meanwhile, under the action of mechanical stress, non-uniform distribution of charges in the T-CZSV can cause spontaneous polarization, so that an internal electric field is generated, and the separation of current carriers is effectively promoted. After the T-CZSV is coupled with a photocatalytic material cobalt stannate (Co2SnO4 and CSO) which is reasonable in lattice arrangement, stable in physicochemical property and complementary in energy band structure, the light absorption range is further widened, the photon-generated carrier separation efficiency is further improved, and efficient hydrogen production is assisted.

The invention discloses a preparation method of a sodium ion intercalation cadmium thiophosphate material, and relates to the technical field of functional material preparation. The preparation method comprises the following steps: adding cadmium thiophosphate into a mixed aqueous solution of ethylenediaminetetraacetic acid and potassium salt, and stirring at the temperature of 40-60 DEG C to carry out first ion exchange reaction, so as to obtain a potassium ion intercalation cadmium thiophosphate intermediate; and adding the potassium ion intercalation cadmium thiophosphate intermediate into a sodium salt aqueous solution, stirring at the temperature of 20-30 DEG C, and carrying out secondary ion exchange reaction to obtain the sodium ion intercalation cadmium thiophosphate material. The method adopts a low-temperature water-phase ion exchange process, has the characteristics of mild conditions, simplicity and convenience in operation, environmental friendliness and the like, and is suitable for large-scale preparation. Effective intercalation of sodium ions can be realized under mild conditions, so that the interlayer spacing of the obtained material is obviously enlarged, the conductivity is obviously improved, and the material shows excellent energy storage performance when being used as a sodium ion battery negative electrode.

Perovskites have high density of vacancies which absorb oxygen molecules and upon illumination, transform them into superoxide species which react with perovskites to decompose them, preventing use of these materials in many photo-applications. The present disclosure provides ways for improving the stability of perovskites in air ambient by doping perovskites with metals such as lead, cadmium, zinc, manganese, iron, cobalt, nickel, copper and tin which decreases the density of vacancies in perovskites and significantly increases the lifetime of perovskites. Perovskite solar cells containing inorganic and organic ions such as Cs+, formamidinium and methylammonium cations, Pb2+, Br- and I- with these metal dopants exhibit stable efficiency within a month of storage in air ambient with the relative humidity of 50%.

The application discloses a kind of micro / nano multidimensional composite structure reinforcing phase materials and in-situ preparation method thereof, belong to electric functional material technical field.The reinforcing phase material has double-layer, multidimensional structure, inner layer is micron MAX phase powder, surface layer is in-situ generated nanometer A element oxide particles.Its preparation steps are: after MAX phase powder is preprocessed by ball milling, uniformly mixed with polymeric agent, dispersing agent and deionized water and is frozen granulation, vacuum freeze-drying, finally by high-temperature oxygen pressurized heat treatment is prepared.The reinforcing phase material prepared in the application has good sphericity, controllable particle size, and exhibits excellent fluidity and filling property during the compounding process with Ag, Cu, Al, Sn and other conductive metal powders.Compared with the metal matrix composite material reinforced by original MAX phase powder, the conductivity is greatly improved, and has good mechanical properties, and has the potential for large-scale application in the field of electric contact, electronic circuit, new energy distribution system, etc.

This invention provides a highly transparent nanocomposite film for ultraviolet-blue light protection and its preparation method. The aforementioned highly transparent nanocomposite film achieves a transmittance of less than 5% in the 250–500 nm ultraviolet-blue light band by precisely controlling the core-shell structure and energy levels of ZnCdS@Cd-rich nanocrystals through differentiated ligand ratios, coupled with a low filler content design of 0 < x ≤ 5 wt%. This results in highly transparent nanocomposite films that effectively shield high-energy harmful light radiation while maintaining a transmittance of not less than 90% in the long-wavelength visible light band above 520 nm, balancing protective effect and visual clarity. This solves the shortcomings of traditional materials that either provide insufficient protection or suffer from visual distortion due to poor transmittance. Furthermore, the preparation method is simple and controllable, requires no complex equipment, and is compatible with various coating methods such as drop coating, spin coating, and blade coating, making it suitable for large-scale production.