32 results about "Tin sulfide" patented technology

The invention relates to the field of design and preparation of powder metallurgy friction materials, in particular to a copper-based powder metallurgy friction material and a preparation method thereof. Raw materials used in the method comprise, by mass, 45%-55% of copper powder, 8%-20% of iron powder, 6%-15% of ferrochromium, 16%-22% of graphite, 0.5%-4% of molybdenum disulfide, 0.5%-4% of tin sulfide and 0.5%-4% of nickel-coated tungsten disulfide, and the mass ratio of the tin sulfide to the nickel-coated tungsten disulfide is (1-2): (1-2). In the nickel-coated tungsten disulfide, the content of nickel is 5-40%; the sum of the total amount of molybdenum disulfide, nickel-coated tungsten disulfide and tin sulfide is less than or equal to 5%. The preparation method comprises the following steps: weighing raw material powder according to the designed components, mixing, pressing and sintering to obtain the product. The composition design has the characteristics of scientificity, simple and controllable process and the like, and the obtained product has excellent tribological performance and completely meets the friction braking requirement of high-speed heavy-load equipment of 400km / h and above.

The utility model relates to a tin bath sulfur dioxide blowing device which comprises a sulfur dioxide generating device used for generating small-flow sulfur dioxide gas, and the sulfur dioxide generating device is led into a blowing pipe; the blowing pipe is a metal pipe body, one end of the metal pipe body is sealed, the other end of the metal pipe body is connected to the sulfur dioxide generating device through a hose, a small hole is formed in the sealed end, and a nozzle is arranged at the position of the small hole; a flow meter is arranged on the hose and is used for monitoring the flow of sulfur dioxide in the blowing pipe to be small flow; a support is arranged on the metal pipe body, and the blowing pipe is fixed to the positions of climbing rollers, attached with tin sulfide, of the first to third transition roller tables through the support. Sulfur dioxide is blown to the roller through the small holes, sulfur dioxide and tin sulfide are subjected to a chemical reaction, SO2 and the glass plate can generate a Na2SO4 thin film protection layer capable of being wiped off under the high-temperature condition, the Na2SO4 thin film protection layer is attached to the lower surface of the glass plate, and the hardness of the glass plate is increased. The probability of gouges and abrasion is reduced, and the problem of quality defects is solved.

The invention relates to a method for preparing formic acid by wrapping tin sulfide (SnSx) with graphene oxide (GO) to improve reduction of carbon dioxide (CO2) through electro-catalysis, in particular to an efficient electro-catalysis carbon dioxide reduction system synthesized by wrapping the surface of SnSx with GO through a microwave-assisted method, and belongs to the technical field of catalytic energy. Amorphous SnSx nanoparticles are synthesized by adopting a solution method, and the surface of SnSx is coated with GO nanosheets by adopting a microwave-assisted method to form the SnSx / GO composite material. GO wrapping effectively inhibits crystallization growth of SnSx and loss of sulfur atoms in the electrochemical reduction process, and meanwhile GO is reduced into rGO in situ to optimize mass transfer. In a flow cell, the catalyst achieves a high current density of 126.25 + / -0.78 mA cm <-2 > and a formic acid Faraday efficiency (FE) of 99.9 + / -1.1%. The smooth implementation of the patent provides an efficient strategy for regulating and controlling the efficiency of reducing carbon dioxide into formic acid through electro-catalysis, solves the problem of unstable system structure in the prior art, and provides greater possibility for industrialization in the field of electro-catalysis carbon dioxide reduction.

This invention provides an anode material, its preparation method, and its application. The anode material includes a silicon-carbon material and a modified coating layer covering the surface of the silicon-carbon material. The silicon-carbon material includes a core and a carbon layer covering the surface of the core. The core includes porous carbon and silicon deposited in the pores of the porous carbon. The modified coating layer, in the direction away from the silicon-carbon material, sequentially includes a first coating layer and a second coating layer. The first coating layer is made of tin and tin sulfide, and the second coating layer is made of a tin-modified sulfide solid electrolyte. Tin compensates for irreversible capacity loss and improves first-time efficiency. Tin and tin sulfide have high ionic conductivity, and the "point-to-surface" conductive network formed by tin and the carbon layer can significantly reduce interfacial resistance. The plasticity of the tin-modified sulfide solid electrolyte itself can optimize the interfacial contact between the anode and the electrolyte, reduce interfacial impedance, and buffer the volume expansion stress of the silicon material during charging and discharging. The synergistic effect of the above structures can effectively suppress the volume expansion of the silicon material.

The invention belongs to the technical field of antibacterial photodynamics, and provides antibacterial photodynamics for treating periodontitis by regulating ROS (reactive oxygen species) through microenvironment response and a preparation method of the antibacterial photodynamics. Comprising the following steps: preparing tin sulfide oxide by taking sodium dodecyl benzene sulfonate, tin chloride pentahydrate and L-cysteine as raw materials; zinc nitrate, copper nitrate, urea and thioacetamide are used as raw materials to prepare nano-enzyme; the antibacterial photodynamic material is prepared by taking indocyanine green, bacterial targeting peptide, nano enzyme, tin sulfide oxide and dihydromyricetin as raw materials. The microenvironment response antibacterial photodynamic force aiming at periodontitis infection and treatment characteristics is constructed, the antibacterial photodynamic force is constructed by a strategy of combining bacterial infection microenvironment response ROS programmed regulation and control, precise and long-acting treatment and immune regulation and control, and the curative effect and scene of the antibacterial photodynamic force for treating periodontitis are improved and widened.

The invention provides an ITO waste target recovery method. The ITO waste target recovery method comprises the following steps: mixing an ITO waste target, sulfur and graphite to obtain a mixture; placing the mixture in an inert environment, heating the mixture to 300-430 DEG C, and carrying out a vulcanization reaction to obtain an intermediate after the reaction is finished; heating the intermediate to 1100-1200 DEG C under a first pressure, and obtaining a mixed gas containing indium sulfide and tin sulfide after the reaction is finished; under second pressure intensity, placing the mixed gas containing indium sulfide and tin sulfide at the temperature of 800-850 DEG C, and respectively obtaining condensed indium sulfide and gas containing tin sulfide after the reaction is finished; and placing the gas containing tin sulfide at a temperature of 550-650 DEG C under a third pressure intensity, and obtaining condensed tin sulfide after the reaction is finished. The method provided by the invention is environment-friendly, and the ITO waste target can be recycled to prepare the high-purity indium sulfide.

The application discloses a tin disulfide doped silicon-carbon negative electrode material and a preparation method and application thereof. The silicon-carbon negative electrode material comprises tubular carbon material and tin disulfide, the tin disulfide is located on the surface of the tubular carbon material, and each of the tubular carbon material contains at least one nanosilicon. The silicon-carbon negative electrode material in the application contains tin disulfide, and the specific capacity and rate performance of the silicon-carbon negative electrode material can be improved; the silicon and carbon material can inhibit the volume expansion of the tin disulfide, and the silicon, carbon material and tin disulfide show good compatibility. Therefore, the tin disulfide doped silicon-carbon negative electrode material has excellent specific capacity and rate performance, and when the material is applied to a battery, the battery has good specific capacity, rate performance and cycle stability.

The invention provides a preparation method of a hydrothermal carboxylated cellulose derived carbon dot modified indium tin sulfide (SIS-CDs) composite catalyst. The catalyst has excellent performance in the aspect of photocatalytic synthesis of hydrogen peroxide (H2O2). The preparation method of the catalyst comprises the following steps: synthesizing tin indium sulfide (SnIn4S8, SIS) and a carbon dot solution (CDs) by adopting a solvothermal method and a hydrothermal method respectively, then mixing the two solutions, carrying out oil bath heating under the condition of condensation reflux, and after the reaction, carrying out multiple times of centrifugal washing and drying to obtain the composite material. Wherein the modification of the carbon dots significantly inhibits the recombination of photon-generated carriers, and the carbon dots obtained by hydrothermal carboxylation of cellulose can retain carboxyl groups on the carbon dots, which is beneficial to improving the utilization rate of oxygen (O2) in a reaction system and effectively enriching protons (H +) in water. Experimental results show that when the ratio of a carbon dot solution to water is 60: 40, the composite material has the optimal performance, at the moment, the H2O2 generation rate is 1844 [mu] mol.g <-1 >. H <-1 >, and efficient synthesis of H2O2 is realized in pure water.

The application provides a method for removing uranium and organic matters in water body and generating electricity simultaneously, and particularly relates to the field of resourceful treatment of wastewater. The method comprises the following steps: placing an electrolyte solution containing a source of hexavalent uranium and organic matters in a photoelectrocatalytic reaction tank for light irradiation; the photoelectrocatalytic reaction tank uses tin sulfide nanosheet / carbon felt as a cathode, and uses titanium dioxide nanomaterial and a photovoltaic cell as a composite anode. The application utilizes the light anode to generate electron-hole pairs under light excitation, and the post-positioned photovoltaic cell generates a bias voltage under light excitation to drive the photo-generated electrons to transfer to the cathode and generate electricity, while improving the separation efficiency of the electrons and the holes. The soluble and easily migratory hexavalent uranium is quickly enriched by the tin sulfide nanosheet / carbon felt and is reduced to the non-migratory tetravalent uranium precipitate on the surface of the tin sulfide nanosheet / carbon felt by the photo-generated electrons and low-valence S. According to the test results, the highest removal rate of the method provided by the application to the organic matters and the uranium can reach more than 97%, and the maximum power density is 2.01 mW·cm ‑2 .

The invention provides a tin bath gaseous tin compound waste gas high-temperature purification device, which belongs to the technical field of tin bath waste gas purification, and comprises a high-temperature collection assembly, a tin vapor condensation recovery assembly, a composite solid adsorption assembly and a waste gas monitoring and discharging assembly which are connected in sequence, the composite solid adsorption assembly comprises a first-stage adsorber and a second-stage adsorber which are sequentially arranged in the waste gas flowing direction. Aiming at the characteristics of tin steam, tin oxide and tin sulfide, the high-temperature purification device for the gaseous tin compound waste gas in the tin bath adopts a purification sequence of condensing and recovering tin oxide, then removing tin sulfide through NaOH and finally removing tin sulfide, a purification system is reasonably arranged, the efficient and stable operation of the purification system is ensured, meanwhile, ceramic balls are used as carriers of NaOH, and the high-temperature purification device for the gaseous tin compound waste gas in the tin bath is realized. The stability of the purification process is further improved, leakage of waste gas and loss of heat are effectively reduced in the adsorption core replacement process in combination with an automatic isolation structure, and the stability and reliability of long-term operation of the purification system are further improved.

The invention relates to the field of functional materials, in particular to a silver sulfide composite photocatalyst based on indium tin sulfide surface modification and a preparation method thereof.The preparation method comprises the steps that Ag2S nanoparticles are prepared through a two-step hydrothermal method, silver nitrate is dissolved in ultrapure water, TAA is added after magnetic stirring, a hydrothermal reaction is conducted for 3-12 h, precipitates are washed three times through ultrapure water and three times through ethyl alcohol respectively, and normal-pressure drying is conducted for 3-24 h; and lamellar SnIn4S8 is grown on the surface of the SnIn4S8 in situ to form a heterojunction, namely an aqueous solution of Sn < 4 + > and acetic acid is prepared, Ag2S nanoparticles are added for ultrasonic treatment for 10-30 min, TAA is supplemented, hydrothermal treatment is performed for 3-6 h, and centrifugal collection is performed at the speed of 8000-10000 rpm. According to the method, the problems of high carrier recombination rate and insufficient visible light utilization of traditional photocatalysts such as TiO2g-C3N4 are solved, the efficiency retention rate is high after five cycles, XRD (X-Ray Diffraction) has no impurity peak, and the method is suitable for tetracycline antibiotic pollution treatment in water and has wide application prospects.

Provided is a tin-plated steel sheet which is more excellent in yellowing resistance in a steel sheet for containers having a film layer containing zirconium without being subjected to a conventional chromate treatment. A tin-plated steel sheet is adopted which has a steel sheet, a tin plating layer located on at least one surface of the steel sheet, and a film layer located on the tin plating layer and containing zirconium oxide and tin sulfide, in which an adhesion amount of the tin-based plating layer is 0.1 g / m2 or more and 15 g / m2 or less in terms of the amount of metal Sn, an adhesion amount of the zirconium oxide in the film layer is 0.2 mg / m2 or more and 50 mg / m2 or less in terms of the amount of metal Zr, and an adhesion amount of the tin sulfide is 0.1 mg / m2 or more and 5 mg / m2 or less in terms of the amount of sulfur.

This invention provides a method for improving the performance of copper indium gallium selenide (CIGS) and copper zinc tin sulfide selenide (CZTSSe) solar cells by controlling the internal ion migration of these cells through an applied bias voltage. This method applies a bias voltage of specific magnitude, direction, and duration to the CIGS and CZTSSe solar cells, driving the directional migration of mobile ions within the devices, thereby controlling the elemental distribution and interfacial chemical state. Specifically, Na ions are enriched at the heterojunction interface, while a small amount of Cd and In ions diffuse downwards to the absorber layer. This effectively passivates harmful defects at the interface and grain boundaries, reduces carrier recombination losses, improves carrier separation and transport characteristics, and ultimately enhances the photovoltaic performance and conversion efficiency of the devices. This invention offers a simple and highly controllable process, providing a new technical approach for the fabrication of high-performance CIGS and CZTSSe solar cells.

The invention provides a tin sulfide composite material and a preparation method and application thereof, and belongs to the technical field of energy storage materials, the tin sulfide composite material comprises a carbon material and SnSx uniformly packaged in the carbon material, and x is greater than or equal to 1 and less than or equal to 2. The preparation method comprises the following steps: dispersing tin salt, a sulfur source and alcohol-soluble resin in an organic solvent to obtain a mixed solution, and evaporating the mixed solution to dryness to obtain a mixed precursor; and calcining, grinding, washing and drying the mixed precursor in a protective gas atmosphere to obtain the tin sulfide composite material SnSx-C. According to the prepared tin sulfide composite material, under the separation action of the carbon material, the agglomeration phenomenon of tin sulfide in the calcination process can be effectively controlled, and the generated tin sulfide is uniformly packaged in the carbon material, so that the volume change of a lithium ion battery negative electrode material prepared from the tin sulfide composite material in the charging and discharging process is effectively relieved.

The invention relates to a plurality of tin sulfide quantum dots having a mean atomic ratio of tin to sulfur of from 1.1:1 to 10.0:1, a mean diameter of 0.50 nm to 5.00 nm, and which are photoluminescent at wavelengths of (a) 360 to 470 nm, (b) 475 to 545 nm and (c) 550 to 740 nm.

The application relates to the technical field of optoelectronic materials and devices, and discloses a wide-spectrum-response photodetector and a preparation method thereof. The core composite photoactive layer of the photodetector comprises a germanium-tin alloy layer, a tin sulfide interface layer and a perovskite metasurface layer from bottom to top. The germanium-tin alloy layer with gradient tin content is prepared through magnetron sputtering, the tin sulfide interface layer is formed in situ through sulfuration during annealing, the narrow-band-gap perovskite metasurface layer with a subwavelength periodic structure is prepared through a solution method combined with a nanoimprint technology, and finally, the complete wide-spectrum photodetector is assembled. The tin sulfide interface layer realizes gradient band matching and interface defect passivation, the perovskite metasurface layer enhances the light field localization effect, and the two are coordinated to make the photodetector realize ultraviolet-visible-mid-infrared full-band response, and the photodetector is compatible with a silicon CMOS process, has excellent stability, is suitable for optical communication, multispectral imaging and the like scenes, and has important industrial application value.

This invention discloses an electrochemical sensor for detecting diopside (DOP) based on a kaolin-tin disulfide material and its construction method, belonging to the field of electrochemical analysis technology. The electrochemical sensor of this invention includes a base electrode, on which a kaolin-tin disulfide composite material and a molecularly imprinted polymer material with the template molecule removed are sequentially modified. First, tin disulfide is loaded onto the surface of kaolin to synthesize the kaolin-tin disulfide composite material, which is then drop-coated onto a glassy carbon electrode to obtain a KL-SnS2 / GCE electrode. Subsequently, using DOP as a template molecule and o-phenylenediamine as a functional monomer, the molecularly imprinted polymer is modified onto the KL-SnS2 / GCE electrode via electropolymerization to capture the target and generate electrochemical signal changes. The method of this invention features simple material synthesis, requires few reagents, and the sensor construction is easy to operate, low in cost, and capable of recognizing and detecting DOP.

This invention discloses a sulfide solid electrolyte, its preparation method, and a battery, belonging to the field of battery material technology. The preparation of the sulfide solid electrolyte includes: thermally reacting the raw materials for the preparation of the sulfide solid electrolyte; tangentially filtering the material obtained after the thermal reaction; and spray-drying the solid obtained from the tangential flow filtration. The raw materials include a first precursor, a second precursor, and a solvent. The first precursor includes lithium sulfide, and the second precursor includes at least one selected from phosphorus pentasulfide, silicon sulfide, germanium sulfide, tin sulfide, sodium sulfide, potassium sulfide, ammonium sulfide, calcium sulfide, and arsenic sulfide. This method has a relatively simple process flow and operation, low energy consumption and cost, and high production efficiency, making it suitable for industrial production. The sulfide solid electrolyte obtained in this way is relatively soft, making it easier to contact the positive and negative electrodes under extrusion conditions during the further preparation of the battery, improving density, thereby facilitating electron transport and reducing losses.

A method for preparing defect-engineered hollow mesoporous copper-doped tin sulfide nanospheres relates to a method for preparing defect-engineered hollow mesoporous nanomaterials. The present invention aims to address the problems of existing metal sulfide nanoparticles, such as high electron-hole pair binding efficiency, poor photoresponse and catalytic performance, and uneven catalyst morphology and large size. The method includes the following steps: 1. Prepare a polyvinyl pyrrolidone solution; 2. Prepare a light yellow copper oxide suspension; 3. Prepare hollow mesoporous copper sulfide nanospheres; and 4. Prepare defect-engineered hollow mesoporous copper-doped tin sulfide nanospheres. The present invention is used to prepare defect-engineered hollow mesoporous copper-doped tin sulfide nanospheres.

This invention belongs to the field of antibacterial photodynamic therapy (PDPT), providing a microenvironment-responsive ROS-modulated antibacterial photodynamic therapy for periodontitis and its preparation method. It includes: preparing tin sulfide oxide using sodium dodecylbenzenesulfonate, tin chloride pentahydrate, and L-cysteine ​​as raw materials; preparing nanozymes using zinc nitrate, copper nitrate, urea, and thioacetamide as raw materials; and preparing antibacterial photodynamic therapy using indocyanine green, bacterial targeting peptides, nanozymes, tin sulfide oxide, and dihydromyricetin as raw materials. This invention constructs a microenvironment-responsive antibacterial photodynamic therapy targeting the infection and treatment characteristics of periodontitis. It proposes a strategy combining microenvironment-responsive programmed regulation of ROS in bacterial infection, precise and long-lasting treatment, and immune regulation to construct antibacterial photodynamic therapy, thereby improving and expanding the efficacy and application scenarios of antibacterial photodynamic therapy for periodontitis.

The application discloses an ionic battery composite material and a preparation method and application thereof, and relates to the technical field of battery materials. The application wraps nano-flower tin disulfide with high-conductivity nano-boron carbide, and the obtained boron carbide-tin disulfide composite is wrapped in cut multi-walled carbon nanotubes, so that the interface impedance is reduced, more electronic transmission tunnels are provided, the boron carbide-tin disulfide composite can accommodate the volume change of the material itself in the ion deintercalation process, the serious volume expansion effect of tin disulfide as a negative electrode material in the charging and discharging process is overcome, and the damage of the electrode structure is prevented. The ionic battery composite material disclosed by the application is applied to the negative electrode of an ionic battery, can effectively improve the specific capacity and capacity retention rate of the battery, enhances the cycle stability of the battery work, and prolongs the service life of the battery.

The invention discloses a preparation method of tin disulfide crystals, and relates to the technical field of preparation of tin disulfide. The preparation method of the tin disulfide crystal comprises the following steps: uniformly mixing sulfur powder and tin powder, and calcining in a vacuum environment to obtain the tin disulfide crystal, wherein the calcining treatment comprises the following steps: heating to 960-1040 DEG C at a heating rate of 1-2 DEG C / min, and carrying out heat preservation treatment at 960-1040 DEG C for 1-3 hours; and then the temperature is slowly reduced to 580-620 DEG C after 80-120 hours, and then the temperature is slowly reduced to 480-520 DEG C after 150-350 hours. The tin disulfide crystal prepared through the method is of a lamellar structure, the transverse size of the tin disulfide crystal is 2-6 mm, and the prepared tin disulfide crystal is good in crystallinity, high in purity and large in size.

The invention belongs to the technical field of semiconductor gas sensors, and discloses a tin disulfide / tin oxide / indium oxide ternary composite material and a preparation method and application thereof.A SnS2 / SnO2 / In2O3 ternary heterojunction system is constructed, the ternary composite material has a unique microflower / nano-particle hierarchical structure, microflower-shaped SnS2-SnO2 provides a high specific surface area and adsorption sites, and the specific surface area and the adsorption sites are high; and small-size In2O3 nanoparticles are uniformly loaded, so that the gas adsorption and catalytic conversion capabilities are enhanced.

The invention belongs to the technical field of functional material preparation, and particularly relates to a porous wall-shaped tin sulfide micron material and a preparation method thereof.The preparation method comprises the steps that a tin source precursor is added into an alcohol solvent to be stirred at the room temperature, then a sulfur source is added, stirring continues to be conducted at the room temperature to be evenly mixed, the obtained precursor mixed solution is subjected to a hydrothermal reaction at the temperature of 120-180 DEG C, and the porous wall-shaped tin sulfide micron material is obtained. And carrying out centrifugal washing and vacuum drying on the product after reaction and cooling to obtain the product. The single-component porous wall-shaped tin sulfide micron material prepared by the method has the characteristics of high specific surface area, rich surface active sites, adjustable mass transfer channels and the like due to the unique porous wall-shaped structure, has efficient catalytic degradation performance on methylene blue, and has important research value in the field of porous materials.

To provide a friction material having good abrasion resistance while maintaining high effective characteristics.SOLUTION: A friction material comprising: a friction modifier; a binder; and a fiber base material, wherein tin sulfide is contained as the friction modifier, and a phenol resin composition containing a novolac-type phenol resin, an epoxy resin, and a solid resol-type phenol resin, and a thermosetting resin are contained as the binder.SELECTED DRAWING: None

The application provides a tin sulfide nanofiber film and a preparation method and application thereof. The tin sulfide nanofiber film has a three-dimensional mesoporous nanofiber network, combines the papermaking film-forming characteristics of cellulose, and has the characteristics of inorganic non-metallic tin sulfide material and lithium metal spontaneous reaction to form lithium-tin alloy lithiumophilic sites and a lithium sulfide interface layer, and can be used for a battery diaphragm modification layer to protect a lithium metal battery, homogenize lithium ion distribution, promote uniform deposition of lithium metal, and inhibit lithium dendrite growth, thereby greatly improving the cycle stability of the lithium metal battery. Compared with a tin sulfide particle material, the tin sulfide nanofiber film has the advantages of flexibility, self-supporting, lightness, thickness controllability, good mechanical strength, high porosity and uniform mesoporous distribution; the application organically links nanocellulose, tin sulfide and a lithium metal battery together, and explores the unique role of the tin sulfide nanofiber film in the battery field, thereby greatly improving the cycle performance of the lithium metal battery and improving the rate performance of the battery.

The invention discloses a cobalt-doped SnS / SnS2 heterostructure / nitrogen-doped carbon core-shell nanotube composite negative electrode material and a preparation method of the cobalt-doped SnS / SnS2 heterostructure / nitrogen-doped carbon core-shell nanotube composite negative electrode material. According to the material, a nitrogen-doped carbon nanotube (CPPy-NT) is used as a skeleton, and a cobalt-doped SnS / SnS2 heterostructure is loaded, so that a core-shell nanotube composite system is formed. A SnS2 energy band structure is reconstructed through cobalt doping, a Co-S strong bond is formed, and volume expansion is inhibited; the nitrogen-doped carbon matrix provides a high conductive network (the conductivity is greater than 103S / cm) and rich mesopores (the aperture is 2-10nm), and accelerates Na < + > transmission (the diffusion coefficient is greater than 2.5 * 10 <-10 > cm < 2 > / s). The preparation method comprises template-assisted polymerization, calcination and hydrothermal vulcanization processes, and realizes accurate regulation and control of the material structure. The initial capacity of the obtained negative electrode is greater than 800mAh / g under 0.5 A / g, the capacity retention ratio is 98% or more after circulation for 100 times, the capacity retention ratio is 85% or more after circulation for 1500 times under 5A / g, and the rate capacity of 15A / g reaches 400mAh / g or more. The invention solves the problems of large volume expansion, poor conductivity and short cycle life of the tin sulfide-based material, and is suitable for high-performance sodium ion batteries.

The invention discloses a preparation method of a tin dioxide-tin disulfide-silicon dioxide-based rhodamine 6G fluorescent film sensor for rapidly detecting NO2, and relates to a preparation method of a fluorescent film sensor. The invention aims to solve the problem that the film forming mode of the existing fluorescent film sensor can greatly reduce the sensitivity. The method comprises the following steps: 1, preparing a deionized water-absolute ethyl alcohol-ammonia water system; 2, Sn (OH) 4-SiO2 nanospheres are prepared; 3, preparing a SnO2-SnS2-SiO2 nanosphere, and preparing a SnO2-SnS2-SiO2 (4) preparing a SnO2-SnS2-SiO2 based rhodamine 6G fluorescent thin film; and (5) preparing the SnO2-SnS2-SiO2 based rhodamine 6G fluorescent thin film sensor. The preparation method disclosed by the invention is used for preparing the stannic oxide-stannic sulfide-silicon dioxide based rhodamine 6G fluorescent film sensor for rapidly detecting NO2.

The invention discloses an oxygen vacancy-containing bismuth vanadate / tin disulfide composite photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of semiconductor materials. According to the catalyst, a mulberry-shaped bismuth vanadate micron structure containing oxygen vacancies and a hexagonal tin disulfide nanosheet are compounded to form a Z-shaped heterojunction. The preparation method comprises the following steps: synthesizing tin disulfide nanosheets through a hydrothermal method, introducing the tin disulfide nanosheets into a bismuth vanadate precursor solution, and synchronously realizing heterostructure construction and oxygen vacancy introduction through a one-step hydrothermal reaction. According to the invention, the oxygen vacancy defect engineering and the Z-type heterojunction are cooperatively coupled, so that the light response range is obviously widened, and efficient separation and transmission of photon-generated carriers are promoted. Under visible light, the catalyst shows an excellent synergistic degradation effect on hexavalent chromium and tetracycline mixed pollutants, and is characterized in that the two pollutants can be mutually sacrificial agents and mutually promoted to be removed in the reaction process, and the catalyst has a wide application prospect in the field of purification of refractory composite wastewater.

The invention belongs to the technical field of battery materials, and particularly relates to a dual-carbon packaged selenium tin sulfide sodium ion battery flexible negative electrode material and a preparation method thereof. In the material, selenium tin sulfide (SnSSe) is encapsulated in a double-carbon layer formed by hollow carbon spheres (HC) and flexible nitrogen-doped carbon nanofibers (NCF). The preparation method of the material comprises the following steps: firstly, preparing hollow carbon spheres; then, generating SnSSe on the inner wall of the hollow carbon sphere through hydrothermal treatment induction to obtain SnSe (at) HC; and finally, carrying out electrostatic spinning to obtain a flexible SnSe coated HC-electrostatic spinning nanofiber membrane, and carrying out carbonization treatment to obtain the SnSe coated HC-NCF composite fiber membrane. By means of the special double-carbon-layer structure, the volume expansion of SnSSe in the sodium storage process can be more effectively limited, dissolution of polysulfide and polyselenide is greatly limited, the cycle stability of the battery is improved, and then the sodium storage stability of SnSSe is improved.