32results about "Cadmium compounds" patented technology

The invention relates to the fields of polyelectrolyte, reversed-phase colloid dispersion systems, nanoreactors, nanocrystals and the like, in particular to zinc cadmium sulfide nanocrystals prepared by taking a polyelectrolyte complex as a nanoreactor and a preparation method of the zinc cadmium sulfide nanocrystals. Carrying out ultrasonic treatment on the anionic polyelectrolyte and a solvent to form a reversed-phase miniemulsion colloid, then adding a soluble salt solution containing target metal ions, and continuously carrying out ultrasonic treatment to obtain an anionic polyelectrolyte reversed-phase miniemulsion colloid containing the target metal ions; performing ultrasonic treatment on the cationic polyelectrolyte and the solvent to form a reversed-phase miniemulsion colloid; adding a soluble sulfide solution, and performing ultrasonic treatment to obtain sulfide-containing cationic polyelectrolyte reversed-phase miniemulsion colloid; and mixing the two reversed-phase miniemulsion colloids, carrying out high-pressure nanocrystallization, putting the obtained product into a high-pressure reaction kettle, transferring the high-pressure reaction kettle to a drying oven, carrying out solvent heat treatment to obtain zinc cadmium sulfide nanocrystals with the size of 2-5 nanometers, and uniformly distributing the nanocrystals in the polyelectrolyte complex.

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 present invention provides a CdSe / ZnSe magic number cluster, a preparation method and a use thereof, belonging to the technical field of semiconductor luminescent materials. The CdSe / ZnSe magic number cluster of the present invention is a magic number cluster with a core-shell structure, the CdSe magic number cluster is the core, and a layer of ZnSe is coated on the outside as the shell; the emission wavelength of the CdSe / ZnSe magic number cluster is 450-465 nm, and the full width at half maximum is less than 15 nm. In the present invention, a ZnSe induction period sample is added to the CdSe magic number cluster, and the precursor compound of ZnSe is decomposed into ZnSe monomers, and the ZnSe monomers coat the surface of the CdSe magic number cluster to form a CdSe / ZnSe magic number cluster. The CdSe / ZnSe magic number cluster of the present invention is carried out at 25 °C, and this process will not cause the emission peak of the nanocluster to redshift, ensuring the purity of the blue light. The CdSe / ZnSe magic number cluster provided by the present invention is a blue light emitting material with an emission wavelength at 450-465 nm, a full width at half maximum less than 15 nm, and defect-free state luminescence, providing a possibility for the application of II-VI group semiconductor nanocrystals in optoelectronic devices.

The invention provides a lead ion doped chloride perovskite photochromic material, a preparation method and application thereof, a lead ion doped chloride perovskite photochromic film and a preparation method thereof, and belongs to the technical field of photochromic materials. According to the invention, CsCdCl3 is used as a substrate, lead ions are introduced into the substrate, original symmetry is destroyed, and the inorganic halide perovskite material with a chemical formula of CsCd1-aPbaCl3 (wherein a is 0.003-0.1) is obtained, and the material can generate a fast photoresponse speed within a time unit of seconds under the excitation of ultraviolet rays or X-rays so as to generate a color change phenomenon and generate color change. And an optical absorption band of 300-800nm appears in a diffuse reflection spectrum, can reversibly recover after being heated, and is expected to be used in the fields of anti-counterfeit labels, optical storage, visual display or multilayer information encryption.

The invention relates to preparation and application of a narcissus-shaped zinc cadmium sulfide solid solution photocatalyst in the field of photocatalytic hydrogen evolution. The invention aims to provide the narcissus-shaped zinc cadmium sulfide solid solution photocatalyst which is simple and convenient in preparation process and low in cost and has efficient photocatalytic hydrogen evolution performance, so that the photocatalytic hydrogen evolution efficiency is improved, and the urgent demand on clean energy under the current energy crisis is relieved. According to the adopted method, zinc acetate, cadmium chloride, thiourea and polyvinylpyrrolidone serve as raw materials, a one-step hydrothermal synthesis method is adopted, and the prepared narcissus-shaped zinc cadmium sulfide solid solution can be suitable for the field of photocatalytic hydrogen evolution and has high catalytic activity and stability.

The invention discloses preparation of an ultrafast uranyl response AgNWs (at) CZS (at) CdZn-ZIF8 flexible photoelectrode and uranyl detection application of the ultrafast uranyl response AgNWs (at) CZS (at) CdZn-ZIF8 flexible photoelectrode. The method comprises the steps that oily carbon cloth is subjected to plasma cleaning and then soaked with a mixed solution of ceric ammonium nitrate, water and nitric acid; then soaking in a mixed solution of acrylic acid, acrylonitrile and DMF (Dimethyl Formamide), and heating in a water bath; after being taken out, the polymer coating carbon cloth is added into a mixed solution of hydroxylamine hydrochloride, isopropanol and sodium hydroxide, water bath heating is conducted again, and the polymer coating carbon cloth is obtained. The preparation method comprises the following steps: magnetically stirring and heating PVP-containing propylene glycol in a water bath, quickly adding NaCl, continuously stirring, adding an AgNO3 solution, and magnetically stirring and heating; and collecting the precipitate, and washing with acetone and ethanol respectively to obtain gray AgNWs. The preparation method comprises the following steps: adding 2-methylimidazole and AgNWs into an organic solvent solution containing organic amine to obtain an AgNWs composite solution; wherein in the aqueous solution of the organic amine or the organic solvent solution, the concentration of the organic amine is 8-9%; and mixing organic solvents containing cadmium salt and zinc salt to obtain the zinc-cadmium composite solution. The AgNWs composite solution and the zinc-cadmium composite solution are respectively heated and coated on polymer coating carbon cloth, then the polymer coating carbon cloth is put into an organic solvent containing thiourea, after the mixture is heated in a water bath, vacuum drying is carried out, and the AgNWs (at) CZS (at) CdZn-ZIF8 flexible photoelectrode is obtained. According to the invention, the polymer coating carbon cloth is used as a substrate to prepare the AgNWs (at) CZS (at) CdZn-ZIF8 flexible photoelectrode, and the flexible photoelectrode has ultrafast uranyl response capability.

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 discloses a micro / nano multi-dimensional composite structure reinforced phase material and an in-situ preparation method thereof, and belongs to the technical field of electric functional materials. The reinforced phase material has a double-layer and multi-dimensional structure, the inner layer is micron-sized MAX phase powder, and the surface layer is loaded with nano-sized A element oxide particles generated in situ. The preparation method comprises the following steps: carrying out ball milling pretreatment on MAX phase powder, uniformly mixing with a polymerizing agent, a dispersing agent and deionized water, freezing and granulating, carrying out vacuum freeze-drying, and finally carrying out high-temperature oxygen pressurizing heat treatment. The reinforced phase material prepared through the method is good in sphericity degree and controllable in particle size, shows excellent flowability and filling performance in the compounding process with conductive metal powder such as Ag, Cu, Al and Sn, has the conductivity greatly improved compared with an original MAX phase powder reinforced metal-based composite material, has the good mechanical property, and can be applied to the field of metal-based composite materials. The method has the potential of large-scale application in the fields of electric contact, electronic circuits, new energy power distribution systems and the like.

The invention provides a gate material, an organic photoelectrochemical transistor sensor, a preparation method and application, and belongs to the technical field of sensors. According to the CdZnS-coated SnIn4S8 synthesized by the invention, a CdZnS-coated SnIn4S8 grid interface based on DNA double-chain embedded MB is constructed on an ITO electrode, and the detection of OFL is realized by utilizing the signal attenuation caused by MB falling due to the fact that a sensor basic signal with enhanced hole oxidation effect of MB on CdZnS-coated SnIn4S8 and OFL compete to combine with an aptamer. The detection linear range of the sensor is 1.0 * 10 <-14 >-1.0 * 10 <-6 > mol.L <-1 >, the detection limit is 1.3 * 10 <-15 > mol.L <-1 >, and the sensor is successfully used for detecting the content of ofloxacin in water. The method has the advantages of being green, environmentally friendly, wide in detection range, high in sensitivity, good in selectivity, high in anti-interference capacity, high in stability and the like.

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 discloses a chiral metal sulfide nano-material and a preparation method thereof, a plurality of chiral amino acids are used as chiral inducers, and a chiral metal sulfide is synthesized by a one-step method under a hydrothermal reaction condition. Different types of chiral metal sulfide nano materials are obtained by regulating and controlling the types of metal sources, the temperature, the pH value, the types of chiral ligands and the like, and meanwhile, the optically adjustable chiral multi-metal sulfide solid solution is obtained by regulating and controlling the types of multiple metal sources. Different chiral metal sulfides synthesized by the method have good chiral optical activity in a visible light region, have adjustable optical activity, and have relatively high photochemical stability and photoresponsiveness at the same time.

The invention relates to a method for producing a connection, comprehensive: - Providing a first solid material in a first reservoir of an ampoule, - Providing a second solid material in a second reservoir of the ampoule, wherein the ampoule has a separating element which separates the first and second reservoirs impermeably for the two materials in the solid state, wherein the ampoule has a passage element which connects the first and second reservoirs permeable to the two materials in the liquid state, - heating the ampoule in such a way that the two materials are converted into a liquid state by melting, wherein the ampoule is arranged during melting in such a way that the passage element is arranged above an upper edge of the two materials in the reservoirs, - Rotating the ampoule so that the second liquid material flows from the second reservoir through the passage element into the first reservoir, wherein the first and second liquid materials in the first reservoir form the compound. The invention further relates to an ampoule, a manufacturing device, a compound and a use of the compound.

An artificial tanzanite comprises aluminosilicate and vanadium, wherein the content of the aluminosilicate is in a range from 1 mass % to 30 mass % and the content of the vanadium is in a range from 1000 ppm to 40000 ppm. The artificial tanzanite is prepared by a method comprising: providing a synthetic raw material, wherein the synthetic raw material comprises the aluminosilicate, silicon-containing oxide, vanadium-containing oxide, and calcium-containing salt; and heating the synthetic raw material to a synthetic temperature, and keeping the synthetic raw material under a synthetic pressure to carry out synthetic reaction to form the artificial tanzanite after a period of synthetic time.

The invention provides a preparation method of cadmium fluoride for a thorium-based molten salt reactor, aiming at overcoming the defect that the cadmium fluoride meeting the technical index requirements of the thorium-based molten salt reactor is difficult to industrially produce due to the reasons of raw material purity, process parameters and the like in the existing preparation method. The method comprises the following steps: dissolving and filtering cadmium oxide by using ammonia water to remove alkaline insoluble impurities, stabilizing the crystal form of cadmium fluoride by gradient drying, and removing protective ammonium bifluoride impurities at high temperature to obtain a cadmium fluoride product meeting the technical index requirements of a thorium-based molten salt reactor.

The present invention relates to the technical field of inorganic photocatalysis, and specifically discloses a three-dimensional maple leaf micro-nano flower Cd<subgt;0.8< / subgt;Zn<subgt;0.2< / subgt;S photocatalyst and a preparation method thereof. The preparation method includes the following steps: Step 1: Take Cd(NO<subgt;3< / subgt;)<subgt;2< / subgt>·4H<subgt;2O, Zn(NO<subgt;3< / subgt;)<subgt;2·6H<subgt;2O, and H<subgt;2NCSNH<subgt;2 and mix them to obtain a mixed solution; Step 2: Add an ethylenediamine aqueous solution to the mixed solution and stir to obtain a suspension; and the ethylenediamine aqueous solution is obtained by mixing ethylenediamine and water in a volume ratio of 2:(1-4); Step 3: Pour the suspension into the inner lining of a reaction kettle, stir, and carry out hydrothermal reaction at 160-200 °C for 6-24 h; Step 4: After cooling to room temperature, centrifuge and wash with absolute ethanol and distilled water respectively for multiple times, and then dry overnight in vacuum to obtain the Cd<subgt;0.8< / subgt;Zn<subgt;0.2S photocatalyst. The three-dimensional maple leaf micro-nano flower Cd<subgt;0.8< / subgt;Zn<subgt;0.2S photocatalyst prepared by the preparation method in the present invention can effectively improve the photocatalytic effect for the problem that most semiconductor catalysts have a relatively wide energy band and are difficult to effectively absorb visible light.

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 method for recycling a waste cadmium-nickel battery. The method comprises the following steps: S1, discharging, disassembling and sorting the waste cadmium-nickel battery to obtain positive and negative electrode powder; performing heat treatment on the positive and negative electrode powder in an atmosphere furnace, and then performing magnetic separation treatment; s2, adding the demagnetized material into a sulfuric acid solution, then adding carbonic acid and derivatives thereof, and carrying out heating reaction in a closed reactor; s3, introducing carbon dioxide gas into the reaction liquid in the step S2 until the pH value of the reaction system is 4.5-5.2, stirring and reacting for 0.5-1 hour, and then carrying out solid-liquid separation; s4, drying the slurry material obtained after solid-liquid separation in the step S3 to obtain cadmium carbonate; adding an auxiliary agent into the remaining solution, and reacting in a closed reactor; the auxiliaries comprise alcohols, metal hydroxides and carbonates; and S5, after the reaction in the step S4 is finished, carrying out solid-liquid separation on the obtained material, and drying the pasty material to obtain the nickel carbonate. According to the method, the solubility difference of cadmium and nickel under different pH value conditions is used, the pH value is adjusted to precipitate cadmium, the nickel is kept in a dissolved state, then the cadmium is recovered preferentially, then the nickel is precipitated through reaction, and the purpose of recovering the nickel is achieved.

The present invention relates to a method for preparing cadmium phosphide using copper-cadmium slag, and the method comprises the following steps: (1) Oxidative acid leaching: Mix copper-cadmium slag, ammonium dichromate and water, stir and react, and control the end point pH to be 5-5.2. After solid-liquid separation, a mixed solution of zinc sulfate and chromium sulfate and a solid phase are obtained respectively; (2) Separation of zinc and chromium: In the mixed solution of zinc sulfate and chromium sulfate, add ammonia water for chromium precipitation reaction to obtain [Zn(NH3)4](OH)2 solution, and a mixed precipitate of chromium hydroxide and chromium oxysulfate respectively; (3) Separation of copper and cadmium: Add sulfuric acid solution and water to the solid phase for acid leaching reaction to obtain cadmium sulfate solution and copper slag with copper content > 90% respectively; (4) Preparation of cadmium phosphide: Pump the cadmium sulfate solution into a reaction kettle, first add ammonia water to make the pH of the solution 9-12 and then seal it, then remove the oxygen in the reactor, and then introduce phosphine gas for reaction. After the reaction is completed, cool to room temperature, filter, wash and dry to obtain cadmium phosphide product with purity > 98%. The process of the present invention is short, the operation is simple, and the cost is low.

The invention discloses a Sn < 2 + > activated full-inorganic bromide near-infrared luminescent material as well as a preparation method and application thereof. The Sn < 2 + > activated full-inorganic bromide near-infrared luminescent material has a structural formula of Cs7Cd3 (1-x) Br13-y: SnxIy, wherein 0.01 < = x < = 0.05, and 0 < = y < = 0.07; the preparation method comprises the following steps: dissolving a Cs precursor, a Cd precursor and a Sn precursor in a mixed solution of hydrobromic acid and hydroiodic acid, and carrying out hydrothermal reaction for 10-12h at 160-185 DEG C. The inorganic near-infrared luminescent material is obtained by taking Sn < 2 + > as an activator, has a wide visible light coverage range, can be excited by light in a wavelength range of 250-420 nm to emit near-infrared light with a peak wavelength in a range of 450-1050 nm, can meet the application of multiple scenes, and has wide application prospects. The method is suitable for the fields of night vision, NIR-LED, nondestructive testing, medical science and the like.

According to the fluorine-doped lead-free all-inorganic metal halide perovskite luminescent material and the preparation method thereof, F is introduced into a precursor, halogen ions of halogen sites in lead-free all-inorganic perovskite can be partially replaced with F, and due to the fact that F has the extremely small ion radius (about 1.33), the fluorine-doped lead-free all-inorganic metal halide perovskite luminescent material can be used for preparing the lead-free all-inorganic metal halide perovskite luminescent material. The doping of the material usually causes significant local lattice distortion, thereby changing the lattice structure and energy band characteristics of the material. These properties make Fa ideal choice to regulate the luminescent properties of metal halide perovskite and related materials. The fluorescence quantum yield (PLQY) of the original lead-free all-inorganic perovskite material of CsCdCl3 is 19.20%, and the fluorescence quantum yield of the all-inorganic perovskite material introduced with F can reach 97.55%.

The invention relates to purple light excited orange fluorescent powder as well as a preparation method and application thereof. The chemical formula of the orange fluorescent powder is Zn4CdS5. The preparation method comprises the following steps: grinding and uniformly mixing a Zn-containing compound and a Cd-containing compound, sealing in a vacuum quartz tube, calcining, and cooling to obtain the orange fluorescent powder, wherein the Zn-containing compound and the Cd-containing compound contain an S element. Compared with the prior art, the orange fluorescent powder prepared by the invention has the advantages of higher emission intensity and stable physical and chemical properties, and can be widely matched with commercial purple light LED chips.

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 relates to the technical field of nano materials, in particular to a general preparation method for a ternary layered compound MPS3. The method comprises the following steps: (1) uniformly mixing metal powder, phosphorus powder and sulfur powder; (2) carrying out cold press molding on the mixed powder; (3) carrying out vacuum packaging on the molded powder; and (4) heating the packaged powder to a specified temperature, and carrying out heat preservation to synthesize the layered MPS3 powder. The preparation method of the MPS3 powder has the advantages of being simple in process, high in efficiency, low in cost, good in crystallinity, free of aftertreatment and the like, and is expected to be widely applied to the fields of ion transportation, electrochemical energy storage, catalysis, sensors and the like.

The invention discloses a method for preparing a photocatalyst suitable for waste plastic conversion through a lattice strain strategy. The method is used for photocatalytic degradation of waste plastic and hydrogen production. Comprising the following steps: (1) dissolving Cd (CH3COO) 2.2 H2O and Zn (CH3COO) 2.2 H2O in a mixed solution of deionized water and N, N-dimethylformamide, stirring, then adding thioacetamide, and continuously stirring; (2) transferring the obtained solution into a stainless steel autoclave for hydrothermal treatment; and cooling to room temperature, washing with deionized water, and drying to obtain the LS-Cd0. 5Zn0. 5S photocatalyst. According to the LS-Cd0. 5Zn0. 5S photocatalyst, carrier recombination is reduced, charge transfer is promoted, lattice tensile strain induces surface S vacancy to promote generation of. OH, the oxidation-reduction reaction is further enhanced, high-activity photocatalytic performance is achieved, the hydrogen evolution rate reaches 13.83 mmol.g <-1 >. H <-1 >, meanwhile, waste plastic is converted into a pyruvate chemical value-added product, and the waste plastic can be recycled. The preparation method is simple to operate, low in cost and easy for industrial production.

The invention discloses a cadmium-based perovskite material and a preparation method thereof, and the method comprises the following steps: mixing Cs2CO3, OA and ODE, degassing, and carrying out a reaction to obtain a cesium oleate precursor solution; and mixing and degassing CdBr < 2 >, YbBr < 3 >, TOPO, ODE, OAm and OA, and mixing and reacting with the cesium oleate precursor solution to obtain the cadmium-based perovskite material. Yb < 3 + > with the radius similar to that of Cd < 2 + > ions is adopted as a doping element, efficient doping is achieved in combination with a high-temperature thermal injection method, and the doping method is simple, convenient and effective; according to the CsCdBr < 3 >: Yb < 3 + > nanocrystal, TOPO with stronger coordination ability with Cd < 2 + > is introduced, and through an OA / OAm / TOPO three-ligand system, the coordination ability of Cd < 2 + > and the surface stability of the CsCdBr < 3 + >: Yb < 3 + > nanocrystal are balanced, so that the occurrence of large particle aggregation in a reaction nucleation stage is effectively avoided, and the surface defects of the nanocrystal are reduced.

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%.