42results about How to "High prospects for commercial application" patented technology

The invention relates to a visible light responsive photocatalysis material Ag@Ag3VO4 and a preparation method thereof. The Ag@Ag3VO4 photocatalysis material is of a near-spherical composite structure of depositing silver nano granules on the surfaces of silver vanadate granules, wherein the silver vanadate granules have the diameter of 6.5-7.5 mu m, and the surface deposited nano granules have the particle size of 5-25 nm. The invention also provides a preparation method of Ag@Ag3VO4. According to the invention, silver is deposited and loaded on the surface of Ag3VO4, thus the photocatalysis performance of Ag3VO4 is farther improved; and the method has the advantages of simple method, mild reaction conditions, convenience for operation, low energy consumption and the like.

The invention provides a composite sodium ion battery positive electrode material and a preparation method thereof. The material has a shell-core structure; the interior of the material is of a layered structure; and the surface of the material is of a tunnel-shaped structure. By adopting a simple secondary sintering method, raw materials are dispersed on the surface of a layered material througha wet mixing or dry mixing method; a layer of the stable tunnel-shaped structure is generated on the surface of the layered material in situ; and the sodium ion composite positive electrode material with the layered and tunnel-shaped core-shell structure is obtained. The composite sodium ion battery positive electrode material has the advantages of high capacity of the layered material and high stability of the tunnel-shaped structure, and can be stably stored in air, and the cycling stability and the high-power performance are both superior to those of the single layered material or tunnel-shaped structure material. Moreover, the preparation method is simple and low in cost, is capable of effectively reducing the production and storage costs of the layered material, and has relatively high commercial application prospects.

The invention relates to a photocatalyst for degrading organic pollutants and a preparation method thereof. The photocatalyst is vanadium-yttrium composite oxide, a general formula of chemical composition is VxY1O(2.5x+1.5), and x is vanadium-yttrium mol ratio, and is more than or equal to 0.3 and is less than or equal to 3.5. The preparation method for the photocatalyst comprises the following steps that: a yttrium nitrate solution and an ammonium metavanadate solution are mixed to generate a precipitate under the condition of stirring according to the vanadium-yttrium mol ratio; and the precipitate is aged through the stirring and then is evaporated to remove moisture, an obtained solid is dried and finally is baked at a temperature of between 400 and 600 DEG C, and a finished photocatalyst product is obtained after the cooling. The invention also relates to a catalyst for precious metal Pt supported by V1.5Y1O5.25 composite oxide and a preparation method thereof. The photocatalyst has the advantages of simple preparation method and low cost, good visible light degradation property to the organic pollutants, and higher commercial application prospect.

The invention discloses application of transition metal sulfide Mn-Cd-S-loaded solid solution in a photocatalysis hydrogen production aspect. A prepared XS / Mn0.5Cd0.5S(X=Mo, Cu, Pd) photocatalytic material has excellent photocatalysis hydrogen production activity; in addition, the hydrogen yield can respectively reach 3,940, 6,940 and 12, 280 [mu]mol / g / h with a small loading capacity, the higher hydrogen yield can be achieved under visible light irradiation, and the photocatalysis hydrogen production efficiency is respectively 6.5 times, 11.5 times and 20.3 times of a Mn0.5Cd0.5S monomer.

The invention discloses a TiO2-Pd-PPy compound photocatalyst and a preparation method and application thereof. The TiO2-Pd-PPy compound photocatalyst is prepared by the steps: ultrasonically dispersing TiO2 in water, adding PdCl2 and a pyrrole monomer into the water, removing dissolved oxygen, and irradiating with a xenon lamp for photooxidation reduction. A one-step simultaneous photooxidation reduction deposition method adopted in the invention can realize precise positioning and loading of the Pd and PPy. In the compound photocatalyst prepared according to the preparation method, the deposition positions of the Pd and PPy are just the photocatalytic reaction active spots of photo-generated electrons and holes, and can effectively promote separation of photon-generated carriers. The prepared TiO2-Pd-PPy compound photocatalyst shows preferable photocatalysis activity, wherein under full gloss, the hydrogen production efficiency of a TiO2-0.5Pd-0.6PPy photocatalyst through photocatalystic decomposition of water can reach 602mumol / h.

The invention relates to a preparation method of a carbon-based flexible lithium-sulfur battery cathode, belonging to the technical field of preparation of lithium-sulfur battery materials for electrochemical energy storage. The method comprises the following steps of: preparing a three-dimensional conductive carbon network by annealing carbon fibers in an oxidizing atmosphere, taking the three-dimensional conductive carbon fiber network as a current collector, immersing the three-dimensional conductive carbon fiber network into carbon disulfide of sulfur, soaking a carbon fiber hole structurewith a sulfur solution by ultrasonic waves or mechanical oscillation under vacuum, performing evaporating to dryness, and further diffusing the sulfur into finer gaps of the carbon fibers by high-temperature gas phase diffusion to form a carbon-based flexible lithium-sulfur battery cathode with the sulfur uniformly distributed in the three-dimensional conductive carbon fiber network. The flexiblebattery assembled by the self-supporting electrodes can keep high and stable charge and discharge capacity under different folding angles. The preparation method of the self-supporting flexible electrode is simple to operate and easy for large-scale production, is capable of being widely applied to energy storage and flexible wearable equipment, and is good in practical value.

The invention provides a nickel / vanadium oxide hydrogen evolution electrode as well as a preparation method and application thereof. The method comprises the following steps: uniformly mixing a nickelsalt, a vanadium salt and a carbon cloth, and growing a NiV-LDH precursor on the carbon cloth substrate by adopting a hydrothermal method; and performing calcination on the above carbon cloth with the NiV-LDH precursor at a high temperature to obtain the Ni / V2O3 electrocatalytic hydrogen evolution electrode. The electrode provided by the invention has excellent hydrogen evolution performance andgood stability; and the preparation method provided by the invention is simple and convenient to operate, and has high practicability and considerable application prospects.

The invention relates to a near-infrared response photocatalysis material Cu2(OH)PO4 and a preparation method, the preparation method comprises the following steps: mixing Cu(NO3)2 and Na2HPO4 and adding in deionized water, adjusting the pH value of suspending liquid to 4-7, performing hydrothermal reaction for 6-12 hours at 120 DEG C, separating and purifying, and drying to obtain the product of micro-nano crystal having a quadrature structure, wherein the crystal length is 4-5 micrometers, the width is 1.4-1.6 micrometers, and the surface has ravine. The near-infrared response photocatalysis material Cu2(OH)PO4 has good photocatalysis performance under the near infrared irradiation (Lambda is greater than 800 nanometers), 90% of 2,4dichlorophenol can be degraded in six house, and the performance is excellent.

The invention discloses a three-dimensional flower-shaped titanic acid material formed by assembling lamelleted nanosheets which are diverged outwards from the structure center. The length of each lamelleted nanosheet ranges from 100 nm to 600 nm, and the thickness of each lamelleted nanosheet ranges from 10 nm to 15 nm. Each lamelleted nanosheet has six to ten layers, and the interlamellar spacing of each lamelleted nanosheet ranges from 0.5 nm to 1.5 nm. The invention further discloses a method for synthesizing the three-dimensional flower-shaped titanic acid material, TBT serves as a silicon source, acetic acid serves as solvent, P123 serves as a stabilizer, tetra-n-butyl titanate serves as a titanium source, and the three-dimensional flower-shaped titanic acid material is synthesized through solvothermal reaction. The synthesizing method is simple, the three-dimensional flower-shaped titanic acid material does not depend on the crystal form and the size of raw materials, the product structure is stable, the productivity is high, and dispersion is even.

The invention discloses a photocatalytic material Cu2-xS / Mn0.5Cd0.5S / MoS2 as well as a preparation method and application thereof. The preparation method comprises the following steps: 1) preparing asubstrate Mn0.5Cd0.5S solid solution; 2) ultrasonically dispersing the Mn0.5Cd0.5S solid solution prepared by step 1) into water and adding soluble copper salt, Na2S and Na2SO3 into the Mn0.5Cd0.5S solid solution; stirring and reacting to obtain in-situ loaded Cu2-xS / Mn0.5Cd0.5S; 3) adding (NH4)2MoS4 into a reacted solution in step 2) and directionally loading MoS2 by adopting a visible light photo-reduction loading method to generate the Cu2-xS / Mn0.5Cd0.5S / MoS2. A synthesis method for preparing the photocatalytic material Cu2-xS / Mn0.5Cd0.5S / MoS2 disclosed by the invention has simple conditions, no pollution and good stability and has a relatively high commercial application prospect.

The invention discloses a preparation method of halogen bismuth oxide nitrogen fixation photocatalysts with a three-dimensional structure. The preparation method comprises following steps: 1, a glucose aqueous solution is prepared; 2, hydro-thermal reaction, washing, centrifugation, and drying are carried out; 3, an obtained product is added into an acetic acid aqueous solution, and magnetic stirring is carried out; 4, Bi(NO3)3 5H2O is added, after complete dissolving, a halogeno salt of the same molar amount is added so as to obtain a brown precipitate; and 5, drying and sintering are carriedout so as to obtain the halogen bismuth oxide nitrogen fixation photocatalyst with a three-dimensional structure. According to the preparation method, template method is adopted to prepare a plurality of nitrogen fixation photocatalysts, preparation technology is simple, energy consumption is low, different halogeno salts can be adopted to prepare samples of a three-dimensional structure respectively, product purity is high, the morphology is uniform, the dispersibility is excellent, the performance is stable, and the circulation performance is excellent.

The invention discloses a preparation method of a Fe2O3 thin film electrode and application of the Fe2O3 thin film electrode to a photoelectric chemical glucose sensor. The preparation method comprises the steps that ferric nitrate is dissolved in ethanol to obtain an iron source liquid precursor; the surface of a conductive substrate is rotatably coated with the iron source liquid precursor to obtain a thin film precursor; and in the rotatably coating process, the number of layers of rotatably coating is at least one layer, the layers are firstly heated to 145-155 DEG C after each layer of rotatably coating, and then are heated to 345-355 DEG C to treat, and the thin film precursor is sintered to obtain the Fe2O3 thin film electrode. The Fe2O3 thin film electrode prepared by the preparation method is directly assembled into the photoelectric chemical sensor for detecting glucose, and has the advantages of good selectivity and quick response. In addition, the preparation method is simple and has no pollution, the preparation process of the glucose photoelectric chemical sensor is simple, and a high commercial application prospect is achieved.

The invention belongs to the technical field of production of inorganic nano-materials and particularly discloses a high-specific-capacitance SnO2 / C porous microsphere and a production method thereof. The SnO2 / C porous microsphere is produced with triphenyltin acetate, ethyl alcohol and potassium hydroxide by an alcohothermal synthesis-activation method. The produced SnO2 / C porous microsphere has high specific capacitance, wide potential window and good cycle stability. The alcohothermal synthesis-activation method applied is safe, nontoxic, simple, easily operable, efficient, low in cost, and easy to industrially apply.

The invention relates to a visible-light response calcium-bismuth composite oxide catalyst and a preparation method thereof. The visible-light response calcium-bismuth composite oxide catalyst is calcium-bismuth composite oxide, and the chemical composition formula is CaBixOdelta, wherein x is more than or equal to 6.5 and less than or equal to 9, and delta is more than or equal to 10.75 and lessthan or equal to 14.5. The preparation method of the catalyst comprises the following steps of: weighing bismuth nitrate and calcium nitrate, preparing into solution, mixing, then adding edetic acid solution under the condition of stirring, using 35% aqueous solution of ammonia to adjust the pH value of the solution to be 8, stirring and ageing for 5 hours, filtering precipitates, cleaning and drying; and roasting for 12 hours at the temperature of 500-700 DEG C under the air atmosphere, cooling and obtaining the catalyst. The invention has the advantages that the preparation method of the catalyst is simple, the cost is low, and the visible-light response for organic pollutants is higher.

The invention relates to a visible-light responding photocatalytic material with Ag particles in different morphologies loaded on AgInO2 surface in situ. The visible-light responding photocatalytic material is an AgInO2 microncrystal formed through in-situ deposition of Ag nanoparticles in different morphologies on the AgInO2 particle surface, wherein the AgInO2 microncrystal adopts a delafossite structure of an orthorhombic system, the specific surface area is 0.5-3 m<2> / g, the Ag nanoparticles in different morphologies comprise irregular Ag nanoparticles, sphere-like Ag nanoparticles and cubic Ag nanoparticles, and the photocatalytic material adopts the composite structure of Ag NPs@AgInO2, Ag NSs@AgInO2 or Ag NCs@AgInO2. The invention further provides a preparation method of AgInO2. The photocatalytic performance of AgInO2 is further improved by depositing nano-Ag in different morphologies on the AgInO2 surface, and the method has the advantages that the method is simple, reaction conditions are mild, the operation is convenient, energy consumption is low and the like.

The invention discloses a vanadium phosphate nano material with a porous network structure and a preparation method thereof, and the vanadium phosphate nano material is used for a lithium ion batterycathode material. The preparation method comprises the following steps: firstly, growing self-supporting graphene foam by a chemical vapor deposition method, and loading a vanadium phosphate (VPO4) nano material on a graphene foam substrate by a hydrothermal method to improve the conductivity and ionic conductivity of the graphene foam substrate. The vanadium phosphate nano material with the porous network structure can be used as negative electrode materials of lithium ion batteries and has good lithium ion energy storage behavior, and the charging capacity can reach 424.4 mAh g<-1> at a current density of 0.2A g<-1>; after 3,000 cycles of charging and discharging, the capacity maintenance rate still reaches above 50.3%. The preparation method of the vanadium phosphate nano material is simple, avoids the tedious process of preparing electrode sheets by the traditional process, greatly reduces the cost problem of battery assembly, and can realize green mass production.

The invention discloses a preparation method and application of double noble metal loaded nano titanium dioxide, a substrate material of a catalyst is nano TiO2, and double noble metal particles Au-Pt, Ag-Pt and Ag-Au are loaded on the surface of the substrate material. The preparation method comprises the following steps: firstly, synthesizing nano TiO2 as a carrier by using a thermal decomposition method, and then obtaining products Au-Pt / TiO2, Ag-Pt / TiO2 and Ag-Au / TiO2 in a photo-reduction loading manner. The preparation method is simple and easy to operate, and the synthesized A-B / TiO2 (A, B = Au, Ag and Pt) nanoparticles have high photocatalytic activity and stability and have excellent performance in the aspect of photocatalytic degradation of formaldehyde.

The invention discloses a TiO2-Pd-PPy composite photocatalyst and its preparation method and application. TiO2 is ultrasonically dispersed in water, PdCl2 and pyrrole monomer are added thereto, and after dissolved oxygen is removed, it is irradiated with a xenon lamp to cause photooxidation and reduction. TiO2‑Pd‑PPy composite photocatalyst was obtained. The one-step simultaneous photoredox deposition method used in the present invention can achieve precise positioning loading of Pd and PPy. In the TiO2-Pd-PPy composite photocatalyst prepared by the present invention, the deposition position of Pd and PPy happens to be the photocatalytic reaction active site of photogenerated electrons and holes, which can effectively promote the separation of photogenerated carriers. The prepared TiO2-Pd-PPy composite photocatalyst shows good photocatalytic activity. Under full light, the photocatalytic hydrogen production efficiency of TiO2-0.5Pd-0.6PPy photocatalyst can reach 602 μmol / h.

The invention discloses Ag / AgCl / TiO 2 Composite photocatalytic material and its preparation method and application. The substrate material of the catalyst is titanium dioxide, and particles AgCl and Ag are loaded on the surface of the substrate material. First, the titanium dioxide precursor is synthesized by solvothermal method, and then the anatase phase titanium dioxide is obtained by high-temperature calcination. Finally, titanium dioxide is used as the carrier, silver nitrate is used as the silver source and 1-octyl-3-methylimidazolium chloride salt or hydrochloric acid solution It is a chlorine source, and the AgCl loading method can be divided into two types: hydrothermal co-precipitation and immersion precipitation, and then the product Ag / AgCl / TiO is obtained through light reduction treatment. 2 . The preparation method is simple and easy to operate, and the synthesized Ag / AgCl / TiO 2 The microspheres have strong photocatalytic activity and have excellent performance in the photocatalytic degradation of ethylene and benzene and other volatile organic pollutants.

The invention discloses a method for preparing a positive electrode of a carbon-based flexible lithium-sulfur battery, which belongs to the technical field of preparation of lithium-sulfur battery materials for electrochemical energy storage. First, carbon fibers are annealed in an oxidizing atmosphere to prepare a three-dimensional conductive carbon network. The three-dimensional conductive carbon fiber network is used as a current collector, and then the three-dimensional conductive carbon fiber network is immersed in sulfur carbon disulfide. Ultrasonic or mechanical vibration under vacuum makes the sulfur solution infiltrate the carbon fiber hole structure. and evaporated to dryness, and further use high-temperature gas phase diffusion to diffuse sulfur into the finer gaps of carbon fibers to form a carbon-based flexible lithium-sulfur battery positive electrode in which sulfur is evenly distributed in the three-dimensional conductive carbon fiber network. The self-supporting electrode-assembled flexible battery can maintain high and stable charge-discharge capacity under different folding angles. The preparation method of the self-supporting flexible electrode in the present invention is simple to operate, easy to produce on a large scale, can be widely used in energy storage and flexible wearable devices, and has very good practical value.

The invention relates to a photocatalyst for degrading organic dye waste water pollutants. The catalyst is formed by compounding magnesium ferrite and silver vanadate nanoparticles. The chemical composition general formula of the photocatalyst is mMgFe2O4 / Ag3VO4, wherein m is the mass ratio of MgFe2O4 to Ag3VO4; and m is more than 0 and less than or equal to 0.005. A preparation method of the photocatalyst comprises the following steps of: firstly, preparing magnesium ferrite and silver vanadate powder with a citric acid sol-gel method and a chemical precipitation method respectively; secondly, mixing and grinding the magnesium ferrite and silver vanadate powder for 10 minutes according to the mass ratio of the magnesium ferrite to the silver vanadate; and lastly, baking at the temperature of 200-500 DEG C, and baking for 4 hours to obtain a finished catalyst. The catalyst has a simple preparation method, has high visible light degrading performance on organic pollutants in dye waste water, and contributes to recycling simultaneously.

The invention provides a Co3O4 nanobelt array electrode. The electrode is used as an anode for carrying out a chlorination reaction. The Co3O4 nanobelt is deposited by adopting a hydrothermal method on a titanium mesh (or a titanium sheet, a cooper sheet, a copper net, a carbon net, carbon cloth, carbon fibers, graphene, FTO glass and the like) substrate; and after annealing is carried out, namelythe Co3O4 nanobelt is obtained; and firstly, a precursor is formed, and the Co3O4 nanobelt array is formed by heat treatment. The Co3O4 nanobelt array electrode is simple to prepare, the cost is low,the activity is high, the stability is high, and the application prospect is considerable; and the step is simple, operation is convenient, and practicability is high.

The invention discloses an Ag with visible light response 4 (GeO 4 ) The preparation method of photocatalyst, the steps are as follows: (1) Under stirring, slowly drop the sodium germanate solution into the silver nitrate solution, and continue stirring to form a precursor solution; (2) Move the precursor solution to the reaction kettle in, react at 110-130℃ for 10-14h. After the reaction is completed, filter and dry to obtain Ag. 4 (GeO 4 )catalyst of light. Ag prepared by the present invention 4 (GeO 4 ) Photocatalyst has visible light response and has high photocatalytic activity after forming a photocatalyst. It is more suitable for degrading organic pollutants and decomposing water to produce oxygen in practical applications in the field of photocatalysis. Through experimental research, it was found that Ag 4 (GeO 4 ) Photocatalytic materials show good photocatalytic performance. The photocatalyst used for photocatalytic decomposition of water to produce oxygen can decompose water and produce oxygen of 200umol / g after 1 hour of visible light irradiation. Can degrade 98% of methylene blue organic dye in 20 minutes.

The invention relates to a visible-light response calcium-bismuth composite oxide catalyst and a preparation method thereof. The visible-light response calcium-bismuth composite oxide catalyst is calcium-bismuth composite oxide, and the chemical composition formula is CaBixOdelta, wherein x is more than or equal to 6.5 and less than or equal to 9, and delta is more than or equal to 10.75 and lessthan or equal to 14.5. The preparation method of the catalyst comprises the following steps of: weighing bismuth nitrate and calcium nitrate, preparing into solution, mixing, then adding edetic acid solution under the condition of stirring, using 35% aqueous solution of ammonia to adjust the pH value of the solution to be 8, stirring and ageing for 5 hours, filtering precipitates, cleaning and drying; and roasting for 12 hours at the temperature of 500-700 DEG C under the air atmosphere, cooling and obtaining the catalyst. The invention has the advantages that the preparation method of the catalyst is simple, the cost is low, and the visible-light response for organic pollutants is higher.

The invention relates to a nano-nickel oxide electrode material for a supercapacitor and a preparation method thereof. Nickel acetate and water are added into a reaction container, dispersed evenly, transferred to a closed high-temperature reaction kettle, added with acetic acid, and reacted at 300-500°C. After 5-10h, powdery nickel oxide can be obtained by filtering, washing and drying. The prepared electrode material nano-nickel oxide for supercapacitor has a multi-layer stacked structure, its grain size is 5-10nm, and the thickness of the sheet is 20-50nm; The method is safe, non-toxic, easy to operate, high in efficiency, low in cost, and easy for industrial application, and the produced nano-nickel oxide has the characteristics of large specific capacitance, good conductivity, stable structure, good electrochemical cycle stability and the like.

The invention discloses a photocatalytic material Cu 2‑x S / Mn 0.5 cd 0.5 S / MoS 2 Preparation method and application thereof, the preparation method includes the following steps: 1) Preparing substrate Mn 0.5 cd 0.5 S solid solution; 2) Combine the Mn prepared in step 1) 0.5 cd 0.5 S solid solution is ultrasonically dispersed in water, and soluble copper salt and Na are added to it. 2 S and Na 2 SO 3 , stirring reaction to obtain in-situ supported Cu 2‑x S / Mn 0.5 cd 0.5 S; 3) Add (NH 4 ) 2 MoS 4 , using the loading method of visible light photoreduction, directional loading of MoS 2 Generate Cu 2‑x S / Mn 0.5 cd 0.5 S / MoS 2 . Cu of the present invention 2‑x S / Mn 0.5 cd 0.5 S / MoS 2 The preparation and synthesis method of composite photocatalytic materials is simple, pollution-free, stable, and has high commercial application prospects.