155results about "Tin oxides" patented technology

The invention discloses a Ti / IrO2-SnO2-SbO2 gradient active coating anode with low cost and high stability and a preparation process of the Ti / IrO2-SnO2-SbO2 gradient active coating anode. The gradient active coating is characterized in that the gradient active coating is composed of 3-5 layers, the total thickness is 5-15 microns, the thickness of each layer is 1-5 microns, the molar percentage content of iridium in a bottom layer is 0-5%, the sum of the molar percentage content of tin and antimony is 95-100%, the molar percentage content of iridium in a surface layer is 10-20%, the sum of the molar percentage content of tin and antimony is 80-90%, and the thickness of each layer is 1-5 microns. The molar percentage content of iridium from the bottom layer to the surface layer is sequentially increased from 2% to 10%, the molar percentage content of tin and antimony is sequentially reduced from 2% to 10%, and the total iridium loading amount in the gradient active coating is 0.05-0.2 mg / cm < 2 >. The preparation method comprises the three steps of titanium substrate pretreatment, precursor salt alcohol solution preparation and gradient active coating preparation. By adopting a gradient coating mode, the thermal stress between the coating and the titanium substrate in the preparation process is remarkably reduced, the consumption of noble metal is reduced, the oxygen evolution activity of the anode is improved, and the service life of the anode is prolonged. The method is simple to operate and low in cost, and has remarkable industrialization advantages.

The invention relates to a preparation method of a pectin-derived carbon-coated amorphous tin-zinc composite oxide lithium ion battery negative electrode material. The method comprises the following steps: dropwise adding a tin tetrachloride solution and an acidified zinc oxide solution into a pectin solution to obtain a metal ion-pectin dispersion liquid; adding ammonia water to obtain a pectin precursor solution; freezing and solidifying with liquid nitrogen; and after freeze-drying, roasting for 3-5 hours to obtain the pectin derived carbon coated amorphous tin-zinc composite oxide lithium ion battery negative electrode material. The reversible specific capacity of the obtained composite material reaches 1339 mA h g <-1 > after 100 cycles under the current density of 0.2 A g <-1 >.

The invention discloses a double-metal gradient diffusion layer modified high-nickel ternary positive electrode material and a preparation method thereof. The preparation method comprises the following steps: filtering and uniformly dispersing high-nickel ternary positive electrode material powder; introducing inert gas into the atomic layer deposition system, and raising the temperature to a target temperature; respectively preheating the metal precursors A and B to proper temperatures; the preparation method comprises the following steps: sequentially introducing a metal precursor A, precursor water, a metal precursor B and precursor water into a reaction chamber, alternately depositing according to a pulse-reaction-purging sequence, and repeatedly circulating the process to obtain the bimetallic oxide coated high-nickel ternary positive electrode material, and post-annealing treatment. According to the bimetal gradient diffusion layer modified high-nickel ternary positive electrode material prepared by the preparation method disclosed by the invention, the lithium storage performance of the high-nickel ternary material is greatly improved, excellent cycling stability and rate capability are obtained, the coating layer is accurate and controllable, the preparation process is simple, meanwhile, large-batch production can be realized, and relatively high application value is achieved.

The invention discloses a nitric acid type system tin stripping liquid centralized recovery treatment process which comprises the following steps: firstly, adding a cationic coagulant into a nitric acid type tin stripping waste liquid, filtering through a 5-micron filter membrane, discharging into a reaction kettle, and adding a H2O2 solution with the concentration of 5-10%; the pH is adjusted to 2.0-2.5, and copper is removed under the condition of 40-50 DEG C; when the pH value is increased from 2.5 to 3.0-3.5, iron is removed; adjusting the pH value to 13.0-13.5, heating to remove aluminum, and separating to obtain a filtrate containing Na2SnO3; adjusting the pH value of the filtrate to 6.0-6.5, heating to 70-75 DEG C for reaction, and then carrying out gradient cooling to room temperature to generate Sn (OH) 4 precipitate; and centrifugally separating the mixed solution to obtain a tin-containing solid and a tin stripping regenerated solution, and firing the tin-containing solid to obtain a tin dioxide solid. Compared with a traditional process, copper is removed firstly, then iron is removed, aluminum is finally removed, and directional removal is achieved through the difference of precipitation conditions.

The invention discloses a nitrogen plasma vapor deposition modified metal oxide catalyst and a preparation method and application thereof.The preparation method of the catalyst comprises the steps that tin salt, CTAB and ammonia water serve as raw materials, SnO2 is prepared through a solution gel method, then the preliminarily-prepared SnO2 is calcined in the air atmosphere, purer SnO2 is prepared, and the catalyst is used for preparing the metal oxide catalyst. And finally, carrying out chemical vapor deposition modification on SnO2 by utilizing high-energy-state N * plasma to prepare the catalyst. The nitrogen-doped tin dioxide catalyst is synthesized on the basis of a chemical vapor deposition method strategy, and the catalyst shows extraordinary performance of electrocatalytic oxygen reduction for synthesis of hydrogen peroxide in an alkaline medium, has good stability and a wide potential window, and has potential application prospects in the field of electrochemical preparation of hydrogen peroxide.

A modified metal oxide particle sol, when applied as a coating onto a substrate, is capable of having transparency, a high particle refractive index and good coat resistivity. The modified metal oxide particle sol is composed of modified metal oxide particles (iii) in which stannic oxide particles (i) having an average primary particle size of 4 to 50 nm serve as cores and are coated with metal oxide particles (ii) of at least one metal oxide selected from the group consisting of antimony oxide, stannic oxide and silicon oxide and having an average primary particle size of 1 to 10 nm, which modified metal oxide particles (iii) are dispersed in an organic solvent. The average primary particle size of the core particles (i) and the average primary particle size of the coating particles (ii) satisfy the relationshipsize of core particles(i)≥size of coating particles(ii),the ratio (total weight of metal oxides other than stannic oxide) / (weight of stannic oxide) is from 0.005 to 1.0, and the sol includes an amine (a) having a water solubility of 0.1 g / L or more and an amine (b) having a water solubility of less than 0.1 g / L.

The invention discloses a multi-dimensional carbon structure negative electrode material, and belongs to the field of lithium battery materials. The multi-dimensional carbon structure negative electrode material comprises a core layer, a middle layer and a shell layer which are sequentially arranged from inside to outside, the core layer comprises a three-dimensional conductive skeleton loaded with active particles; the material of the middle layer comprises amorphous carbon; the material of the shell layer comprises a metal oxide. The negative electrode material with the core-shell structure is obtained by preparing the multi-layer structure containing the core layer, the middle layer and the outer layer and optimizing the material of each layer. The outer layer and the middle layer can effectively inhibit disordered deposition of metal lithium on the outer surface, active particles of the core layer serve as lithium-loving sites to guide lithium to be nucleated and deposited in fiber coils preferentially, the uniformity and directionality of lithium deposition can be improved through cooperation of the three layers, and therefore growth of lithium dendrites is effectively inhibited; and the safety performance and the cycling stability of the prepared battery are enhanced.

The present invention relates to an inverted perovskite prepared by providing a surface-modified metal oxide nanoparticle as a coating agent for forming an electron transporting layer (or electron transport layer), and using the surface-modified metal oxide nanoparticle as a coating agent prepared in a dispersion type.

Tin tetrachloride pentahydrate, zinc nitrate hexahydrate and dimethylimidazole are used as raw materials, methanol is used as a solvent, and the tin-zinc bimetallic oxide, which is named Sn-Zn-O for short, is obtained through stirring, centrifugal drying and calcining; the material is an n-type semiconductor, and the chemical composition of the material is SnO2 and ZnO. The microstructure of Sn-Zn-O is a nano microsphere, and the particle size range of the Sn-Zn-O is 100-250 nm. The invention relates to a preparation method of a hydrogen sensor based on Sn-Zn-O, namely when the Sn-Zn-O is used as the hydrogen sensor, the optimal working temperature is 180 DEG C, the response value is 112 when the hydrogen concentration is 1000 ppm, the response time is 1.29 s, and the recovery time is 147 s. When the hydrogen concentration range is 0.1-2000ppm, the hydrogen sensor has different responses to hydrogen with different concentrations, and the lowest hydrogen concentration is detected to be 0.1 ppm.

What is provided is a tin recovery method for recovering tin from a tin-containing material, the method including: an oxidation leaching step of performing oxidative leaching of tin in a tin-containing material into a leachate composed of an acidic solution of sulfuric acid to obtain a post-leaching liquid containing tin; an oxidation step of adding a substance that supplies sodium chloride and divalent copper ions to the post-leaching liquid obtained in the oxidation leaching step and oxidizing divalent tin ions contained in the post-leaching liquid to tetravalent tin ions; and a neutralization step of neutralizing the post-leaching liquid after the oxidation step to obtain a tin-containing precipitate.

The invention discloses a method for realizing degradation of polyalkylene oxide compounds and controllable molecular weight through a promoter, which comprises the following steps: adding a photodegradation promoter into a high-molecular-weight polyalkylene oxide product, adjusting the proportion of the promoter and the proportion of effective components, and accurately controlling the shear molecular weight under the irradiation of an ozone emitter, so that the molecular weight of the polyalkylene oxide compounds is controllable. According to the invention, polyalkylene oxide with different molecular weights of 30,000-3,000,000 is prepared by using the photodegradation cocatalyst, so that the photodegradation cocatalyst can meet the requirements of customers in different fields, and meanwhile, the photodegradation cocatalyst prepared by the invention can be recycled to achieve the benefits of reducing cost and improving efficiency.

This invention provides a method for recovering indium fluoride and tin oxide from waste ITO targets, belonging to the field of indium tin oxide waste target recycling technology. The method includes: acid leaching of powdered ITO waste targets with hydrofluoric acid to obtain an acid leaching slurry containing indium fluoride and tin oxide; vacuum distilling the acid leaching slurry to obtain indium fluoride gas and tin oxide solid, respectively; the vacuum distillation temperature is 1000–1100°C; the vacuum degree of the vacuum distillation is 5–20 Pa; the indium fluoride gas is vacuum condensed to obtain indium fluoride solid; the condensation temperature is 700–800°C; the purity of the tin oxide solid is >99.999%; and the purity of the indium fluoride obtained by vacuum condensation is >99.99%. The method provided by this invention has low energy consumption, no carbon emissions, low cost, and high added value, enabling the conversion and recycling of waste materials into high-value materials.

Provided are: a tin oxide particle dispersion liquid in which tin oxide particles are dispersed in a solvent, the tin oxide particle dispersion liquid being characterized in that the Zeta potential at pH 10 is-35 mV or less; the tin oxide particle dispersion liquid is capable of forming a tin oxide particle laminated film in which tin oxide particles are uniformly arranged and which has excellent electrical conductivity. The tin oxide particles may be doped with a heterogeneous element. It is preferable that the dissimilar element is one or more elements selected from among antimony, fluorine, and phosphorus. The primary particle diameter of the tin oxide particles is preferably in the range of 1.5 nm or more and 100 nm or less.

The invention belongs to the technical field of gas sensor detection, and particularly relates to an EMC gas component prediction method based on a V2 / V2O5 / SnO2 sensor and GRU-Attention. The EMC gas component prediction method comprises the following steps: S1, preparing multiple layers of V2C MXene; s2, preparing a V2 / V2O5 / SnO2 composite material; s3, preparing a gas sensor; s4, measuring a resistance signal; and S5, establishing a GRU-Attention gas detection model. The V2C / V2O5 / SnO2 heterojunction gas-sensitive film is successfully synthesized, and the heterojunction provides a large number of adsorption and reaction sites for methyl ethyl carbonate molecules at a low temperature of 150 DEG C through a synergistic effect among high conductivity of V2C, excellent gas-sensitive characteristic of SnO2 and catalytic activity of V2O5; the sensor prepared by the invention has remarkably improved gas sensitive response, high response / recovery speed and low detection limit, and realizes efficient detection of EMC gas in a wide concentration range.

The utility model relates to the field of gas inlet devices of tube furnaces, in particular to a distributed gas inlet device for a tube furnace. Comprising a furnace tube system, the furnace tube system comprises a furnace tube body, flanges are fixedly connected to the two ends of the furnace tube body, a heat insulation furnace plug is arranged in the furnace tube body, a distributed air inlet device is arranged in the heat insulation furnace plug, the distributed air inlet device comprises an air inlet pipe, and the air inlet pipe is installed in the heat insulation furnace plug. A flow guide base disc is installed at the end, close to the furnace tube body, of the air inlet pipe, a distributed air inlet disc is installed on the arc face of the flow guide base disc, a transmission shaft is installed in the distributed air inlet disc, a plurality of flow guide rotary pieces are installed on the arc face of the transmission shaft, and a connecting ring is installed on the arc face of the transmission shaft. The distributed air inlet device for the tubular furnace has the advantages that the uniformity and the stability of air inlet of the tubular furnace are improved, and the process effect and the product quality are improved.

The present invention relates to a thermoelectric textured film that exhibits electrical and thermal conductivity, and a method for producing the textured film. The textured film obtained by this method exhibits electrical and thermal conductivity, as well as high resistance to high temperatures and oxidation, and therefore these films can be used in many fields, such as electrical circuits, thermal barriers, thermoelectric applications, and lighting.

The invention discloses a preparation method of a 3D graphene-loaded tin oxide composite material. The preparation method comprises the following steps: preparing a precursor solution from graphene oxide, tin tetrachloride pentahydrate and ascorbic acid; dropwise adding a lauryl sodium sulfate solution into the precursor solution, and fully mixing to obtain a mixed solution; transferring the mixed solution into a glass bottle, and sealing and heating to promote the self-loading process of the solution; performing freeze thawing / 80 DEG C thermal reduction treatment on the preformed sample to form a preliminary composite material of tin oxide and graphene; repeatedly washing the sample subjected to thermal reduction by using ethanol to remove residual impurities, and then carrying out drying treatment; and carrying out annealing heat treatment on the dried sample in a nitrogen atmosphere to obtain the 3D graphene-loaded tin oxide composite material. The preparation method of the 3D graphene loaded tin oxide composite material provided by the invention is simpler in preparation process, lower in cost and suitable for large-scale industrial production.

The invention provides a microwave-induced CuO / SnO2 nano composite material as well as a preparation method and application thereof, belongs to the technical field of material synthesis, and is used for solving the technical problem of poor gas sensitivity of a CuO / SnO2 composite material. The preparation method of the CuO / SnO2 nano composite material comprises the following steps: dissolving and mixing a tin source in a solvent I, and carrying out chemical reaction to prepare a flat rod-shaped Sn-MOF matrix; dispersing and dissolving the Sn-MOF matrix and a copper source in a solvent II, reacting under a microwave-assisted condition, and washing and drying a product generated by induction; and calcining the dried product in the air to prepare the CuO / SnO2 nano composite material. The acetone steam sensor prepared from the CuO / SnO2 nano composite material has good gas sensing performance. The optimal detection working temperature of the sensor to acetone steam is 200 DEG C, and meanwhile, the sensor also has the advantages of high reaction and response speed, large response value, good long-term stability and the like.

There is provided a method of producing iron oxide pellets having a target internal energy measured as a target heat of magnetite equivalent (HME). An iron oxide is reduced into an exothermic iron compound having a lower oxidation number. The exothermic iron compound is magnetite, wustite, and / or metallic iron and is mixed with iron ore, a binder and optionally a carbon material selected from coke breeze, anthracite and biomass. The iron ore comprises magnetite and / or hematite and / or goethite. The mixture contains at least 1 wt. % of the exothermic iron compound and from 0 to 0.8 wt. % of total carbon. The mixture contains a sufficient amount of magnetite, wustite, and / or metallic iron to maintain the target HME calculated as follows: Formula (I) where CM stands for carbon material, CV stands for calorific value, wus is wustite, mag is magnetite, and Femetal is metallic iron; The iron pellets are formed from the mixture, dried and subjected to an induration process.

The invention discloses a composite porous electrode material as well as a preparation method and application thereof. The composite porous electrode material takes a cellulose nanofiber porous composite material as a carrier and is loaded with a metal oxide active component; the metal oxide is one or more modified structures constructed by heteroatom doping and oxygen vacancy defects. The efficient photoelectric cathode integrating CO2 adsorption and catalytic conversion is constructed, and the effect of remarkably improving CO2 reduction activity and product selectivity is achieved.

The invention relates to a method for one-step synthesis of high-quality stannous oxide through intermittent ultrasonic reinforcement, and belongs to the technical field of semiconductor material preparation. The preparation method comprises the following steps: dropwise adding a sodium hydroxide aqueous solution into a stannous chloride aqueous solution at room temperature under a stirring condition until the pH value is 12.5-13.5 to form a mixed solution system; applying intermittent ultrasonic waves to the mixed solution system for intermittent ultrasonic treatment to induce direct nucleation and growth of stannous oxide and synchronous removal of chlorine impurities, carrying out solid-liquid separation, and drying the solid to obtain the low-chlorine fine-particle-size stannous oxide. According to the method, through the work-stop periodic effect of intermittent ultrasound, dynamic conditions are provided for diffusion and desorption of chloride ions while nucleation and growth regulation are promoted through cavitation, cooperative regulation of particle size refinement and deep dechlorination of stannous oxide is achieved, a high-temperature step or repeated washing is not needed, the process is simple and efficient, the conditions are mild, and the method is suitable for industrial production. And controllable preparation of the high-performance stannous oxide material can be realized.

The present invention provides a tin oxide forming composition and a tin oxide forming method using the tin oxide forming composition. The tin oxide forming composition of the present invention is easy to manufacture and is capable of forming a tin oxide with a high yield.

The invention relates to the technical field of gas sensors, and discloses an Au-doped bimetallic oxide CeO2 (at) SnO2 composite gas sensitive material and a preparation method and application thereof, a gas sensitive sensor and a preparation method and application thereof, and the Au-doped bimetallic oxide CeO2 (at) SnO2 composite gas sensitive material comprises a CeO2 (at) SnO2 composite material and Au nanoparticles loaded on the surface of the CeO2 (at) SnO2 composite material. The Au-doped bimetallic oxide CeO2 (at) SnO2 composite gas-sensitive material is successfully prepared through an improved hydrothermal synthesis method and an impregnation doping method and is prepared into a sensor, and the sensor shows excellent gas-sensitive performance, including high sensitivity and low-concentration response to transformer oil dissolved gases H2 and C2H2.

A gas sensing device is manufactured with three dimensionally connected metal oxide foam structure of large surface area and elongated channel pores within the three-dimensional porous structure for gas sensing applications, thereby increasing the surface area of the sensing layer and expediting sensitivity and sensor response. A gas sensor device includes the fabricated metal-oxide-foam sensing material attached via silver paste to platinum electrodes and ruthenium heater that are printed on low temperature co-fired ceramic substrate. This device will provide improved gas sensing performance with improved sensitivity and response time. Gas sensors including the metal oxide foam sensing material exhibit higher sensitivity to toxic gases such as ethanol and carbon monoxide due to the large surface area achieved from the porous three-dimensional structure providing increased chemical reaction sites and the larger porous channels allowing gases to easily pass, shortening the gas diffusion reaction path.

An aqueous zinc-ion electro-chemical cell may include an anode. The anode may include an electrode and an interphase layer disposed on the electrode. The interphase layer may include a non-stoichiometric tin oxide (SnOx) where 1 < x <= 1.2. The interphase layer may guide Zn²⁺ ions to plate beneath the interphase layer along the Zn (101) crystallographic orientation.

The invention discloses a selenium-doped layered two-dimensional TiO2 / SnO2 quantum dot composite material which can be used as a sodium ion battery negative electrode material. The preparation method of the composite material comprises the following steps: (1) taking Ti3C2 as a raw material, and carrying out high-temperature calcination on the Ti3C2 and selenium powder in an argon (Ar) atmosphere to prepare selenium-doped layered two-dimensional TiO2; (2) taking stannic chloride dehydrate (SnCl2. 2H2O) and thiourea (CH4N2S) as raw materials, and preparing stannic oxide quantum dots (SnO2QDs) by utilizing a hydrothermal method; and (3) taking the selenium-doped layered two-dimensional TiO2 prepared in the step (1) and the SnO2 quantum dots prepared in the step (2) as raw materials, and preparing the selenium-doped layered two-dimensional TiO2 / SnO2 quantum dot composite material by using an ultrasonic method. The invention aims to solve the problems of poor conductivity and ion diffusion rate of TiO2, so that the electrochemical performance of the TiO2 serving as a sodium-ion battery negative electrode material is provided.

The invention relates to tungsten-doped tin dioxide nano-powder, a preparation method thereof and application of the tungsten-doped tin dioxide nano-powder in a semiconductor type gas sensitive element. The preparation method of the tungsten-doped tin dioxide nano-powder comprises the following steps: dissolving a soluble tungsten compound and a soluble tin compound in an aqueous solution containing a surfactant, and adding a complexing agent to obtain a uniform metal ion mixed solution; adding a precipitant into the mixed solution under a stirring condition, and adjusting the pH value to 2-6 to precipitate the metal hydroxide precursor; performing aging, solid-liquid separation, washing and drying on the precipitate to obtain precursor powder; adding a dispersing agent into the precursor powder, and uniformly mixing; and calcining to obtain the tungsten-doped tin dioxide nano powder. The tungsten-doped tin dioxide nano-powder can be used for preparing a semiconductor type gas sensor, an ultraviolet detector, a lithium ion battery negative electrode material, a catalyst or a transparent conductive film.

This invention discloses a method for preparing tin dioxide hydrated colloidal precursors via dual-anode synchronous electrolysis, belonging to the field of electrochemical preparation technology of inorganic functional materials. The method includes the following steps: a) preparing an electrolyte containing 0.01 M hydrochloric acid and adjusting the initial pH value; b) using a high-purity tin plate as anode 1 and a titanium-based size-stabilized electrode as anode 2; using the titanium-based size-stabilized electrode as a common cathode; c) applying a DC voltage for constant-voltage synchronous electrolysis; anode 1 dissolves to generate stannous ions, anode 2 electrolyzes chloride ions to generate hypochlorous acid, and the hypochlorous acid instantly oxidizes the stannous ions to tetravalent tin ions in the bulk solution far from the cathode, forming a translucent tin dioxide hydrated colloidal precursor in situ in an acidic medium; d) drying the resulting colloid under reduced pressure and then calcining it at 200–250℃ to obtain high-purity nano-tin dioxide. This invention achieves integrated "dissolution-oxidation-gelation" through dual-anode synergy, avoiding the loss of hypochlorous acid during cathode reduction.

To provide an optical functional material constituted of a Sn oxide and capable of exhibiting sufficient performance to visible light.SOLUTION: The optical functional material contains Sn and O in an amount of more than 80 atom% in total and has peaks at 2θ=27.5±1.0°, 29.4±1.0°, 32.8±1.5°, and 35.9±1.0°, in X-ray diffraction measurement using CuKα rays. The optical functional material contains Sn and O in an amount of more than 80 atom% in total and has peaks at 2θ=27.5±1.0°, 29.4±1.0°, 32.8±1.5°, and 35.9±1.0° and additionally has peaks at one or more positions among 2θ=46.0±0.7°, 47.2±0.7°, 50.4±0.7°, 51.8±0.7°, 54.2±1.0°, 59.8±1.0°, 62.8±1.0°, and 70.1±1.0°, in X-ray diffraction measurement using CuKα rays.SELECTED DRAWING: None

The application belongs to the field of inorganic nanomaterials, and particularly relates to a low-temperature synthesis method of modified tin dioxide nanoparticles for perovskite solar cells, which comprises the following steps: dispersing a water-soluble salt or hydrate of tin, urea and a metal salt modifier in water; and obtaining a modified SnO2 nanoparticle dispersion liquid by reacting at 15-30 DEG C for 3-4 days; the metal salt modifier is a metal salt of potassium, cesium, magnesium and / or zirconium. The modified SnO2 nanoparticles can promote the transmission and extraction of electrons in the solar cell, inhibit the recombination loss of the perovskite solar cell, and thus improve the power conversion efficiency and stability of the perovskite solar cell when the modified SnO2 nanoparticles are used as an electron transport layer to prepare the perovskite solar cell.