86results about How to "No doping" patented technology

The invention discloses a solid Fenton catalyst and a preparation method and application thereof.The preparation method of the sigma-surface copper-graphitized nitrogen carbide complex modified copper and cobalt co-doped mesoporous alumina solid Fenton catalyst includes the following steps that 1, glucose and aluminum isopropoxide are added in water, stirring is performed to obtain a solution A; 2, an aqueous solution of copper salt and an aqueous solution of cobalt salt are dropwise added to the solution A, and stirring is performed to obtain a solution B; 3, the pH value of the solution B is regulated to be 5-5.5, and stirring is performed to obtain a solution C; the solution C undergoes standing, drying and calcinations, and then a solid D is obtained; 4, the solid D is added to an aqueous solution of urea so as to obtain a suspension E; moisture in the suspension E is evaporated to obtain a solid F; the solid Fenton catalyst can be obtained after the solid F undergoes drying and calcination.The solid Fenton catalyst has the very good removal effect on poisonous and harmful organic pollutants difficult to degrade under the neutral and weak-acid room temperature conditions and has very high hydrogen peroxide utilization rate.

The invention discloses a production process of a PVA (polyvinyl alcohol)-based composite packaging material, relating to the field of film packaging materials. The production process comprises the following three technical processes: preparation of dialdehyde starch, preparation of jute fibers and preparation of a PVA-based composite film. According to the process method, in the preparation process of the dialdehyde starch, corn starch is used as a raw material, no pollution is caused, the cost is low, the raw material is sufficient, a far-infrared quick constant-temperature drying box is used as drying equipment, the dialdehyde starch is dried sufficiently, and no impurity is doped; in the preparation process of the jute fibers, the temperature control is reasonable, a right amount of reagent is added, the jute fibers are pulverized through a YSC-701 type ultrafine pulverizer, and the pulverized fibers are small in particle size and favorable in pulverization effect; and in the preparation process of the PVA-based composite film, parameters such as addition of each component, temperature, time and the like are strictly controlled, thereby ensuring that the prepared PVA-based composite film has favorable mechanical property and water resistance and can meet the requirements for practical production. By using the biological material as the raw material for production, the PVA-based composite film produced by the process is low in cost and degradable, thus greatly reducing environmental pollution.

The present invention discloses a method for manufacturing a hydrogenated microcrystalline silicon film. Firstly a hydrogenated microcrystalline silicon seeding layer having a crystal nucleus is formed on a substrate, and then a hydrogenated amorphous silicon film with a thickness of no more than 3 micrometers is formed quickly by a plasma chemical vapor deposition method. Afterwards the material is put under high pressure hydrogen circumstance which is no less than 500 atmospheres, and at temperature no more than 300 DEG.C, the duration is 3 to 10 hours, thereby the hydrogenated microcrystalline silicon suitable for photoelectric conversation is obtained.

The invention belongs to the technical field of structural-color material preparation, and discloses an amorphous photonic crystal structure-color material with a photocatalytic effect and a preparation method thereof. The method comprises the following steps: preparing a monodisperse silicon dioxide microsphere emulsion by adopting an improved method, and modifying the surfaces of silicon dioxidemicrospheres with ammonia water; and then, preparing SiO2@TiO2 nano microspheres with uniform particle sizes by adopting a mixed solvent method, and carrying out heat treatment under argon to obtainthe amorphous photonic crystal structure-color material with a photocatalysis function. Through introduction of oxygen defects, the nano microspheres can exhibit the characteristics that the amorphousdisordered photonic crystal structure color is high in saturation and does not fade. The shell layer formed by TiO2 nanocrystalline has high electron-hole separation rate, and the photocatalysis function is improved. The non-angle-dependent amorphous photonic crystal structure-color material with the photocatalytic property can replace conventional pigment in use, has double functions of degrading pollutants, and has a great application prospect in environment protection development in pigment industry.

The invention belongs to the technical field of nano functional materials and green energy and discloses a preparation method of a two-dimensional nano-flake photocatalyst which is not doped with precious metal and is low in cost, simple to prepare and high in photocatalytic activity. The prepared two-dimensional nano-flake photocatalyst is manganese-doped titanium dioxide in-situ composite carbon nitride two-dimensional nanocomposite Mn-TiO2/g-C3N4 and has good photocatalytic activity.

The invention discloses a preparing method for a photocatalyst free of precious metal doping, low in cost, easy to prepare and high in photocatalytic activity, and belongs to the technical field of novel nanometer functional materials and green energy.The binary metal co-doping photocatalyst prepared through the method is an iron-manganese co-doping titanium dioxide nanosheet in-situ synthesis carbon nitride two-dimensional nanocomposite FeMn-TiO2/g-C3N4, and has good photocatalytic activity.

The invention discloses a metal-free heterogeneous Fenton-like catalyst, and a preparation method and application thereof. The preparation method of the catalyst comprises the following steps: takingconcentrated sulfuric acid as a solvent, adding graphite powder, NaNO3 and potassium permanganate, performing a heating reaction, then adding H2O2 until the solution changes into a gold brown suspension, and performing washing, drying and grinding to obtain solid powder; and mixing 4-phenoxyphenol and the solid powder F, melting the mixture in ethanol, performing a heating reaction, removing the solvent through evaporation to obtain a solid precursor, and performing a reaction at 350-380 DEG C to obtain solid powder which is the metal-free heterogeneous Fenton-like catalyst. The metal-free heterogeneous Fenton-like catalyst disclosed by the invention is not obviously influenced by the pH value of a reaction system. The harsh condition that the pH value of the system is regulated to 2-3 isnot needed in the reaction process, and a favorable removal effect can be achieved for the degradation of nonbiodegradable toxic/harmful organic pollutants under a neutral condition at room temperature.

The invention discloses a gallium-nitride-based power heterojunction field effect transistor with a local back barrier. The gallium-nitride-based power heterojunction field effect transistor is structurally composed of a substrate, an aluminum nitride nucleation buffering layer, an aluminum indium gallium nitride local back barrier layer, a gallium nitride channel layer and an aluminum indium gallium nitride barrier layer mainly from bottom to top, a source electrode, a drain electrode and a grid electrode are formed on the barrier layer, the source electrode and the drain electrode forms ohmic contact with the barrier layer, and the grid electrode forms schottky contact with the barrier layer. By introducing the aluminum indium gallium nitride local barrier layer with polarization intensity larger than the polarization intensity of the gallium nitride channel layer, negative polarization charges are left after interface charges of the aluminum indium gallium nitride barrier layer and the gallium nitride channel layer are balanced, effect of exhausting part of 2DEG of a grid-drain drift region channel is realized, and an LDD (low density drain) structure is formed, so that modulating of electric field distribution of the channel is realized to improve voltage resistance of a device.

The invention relates to a bamboo recombination material hydraulic unit loading and mode pushing combination device, and relates to bamboo recombination material pressing process equipment. The bamboo recombination material hydraulic unit comprises a base plate seat 1, a charging box 2, a feeder push 3 and an electric control device, wherein the charging box is articulated with the base plate seat, and an inclining reposition oil cylinder 19 is arranged between the charging box and the base plate seat; the feeder push 3 is composed of a guide frame 4 and a material pushing plate 10, and the guide frame 4 is provided with a chain drive device; the front side of the charging box is provided with a lean charging plate 22, and the rear side of the charging box is provided with a mould pushing oil cylinder 29; and the electric control device comprises an electric cabinet, and a PLC(programmable logic controller), wherein the input end of a PCL (printer control language)PLC is connected with the relative input signal, and the output end of the PCL PLC outputs the relative control signal so as to be electrically connected with an executive component. The bamboo recombination material hydraulic unit loading and mode pushing combination device provided by the invention has the beneficial effects that a material bumping process measure is adopted, the material is neat, and the sectional material quality after pressing is improved. The charging box charges material, meanwhile, the mould pushing oil cylinder executes a module pushing motion, and the equipment utilization rate is improved. By using PCL control circuit, the automaticity is high, and the production efficiency is improved.

The invention discloses a method for preparing a bimetallic co-doped two-dimensional nanoelectrode material which is free of precious metal doping, low in cost, easy to prepare and high in photoelectrochemical activity, and belongs to the technical field of novel nano functional materials and green energy. According to the method, an iron and manganese co-doped titanium dioxide nanosheet material is compounded on an iron and manganese co-intercalated molybdenum disulfide nanosheet in an in-situ mode, and a two-dimensional nano composite FeMn-TiO2/MoS2 with an iron and manganese co-doped titanium dioxide nano diamond compounded on molybdenum disulfide in an in-situ mode is obtained. Prepared FeMn-TiO2/MoS2 can be applied to the fields of solar photovoltaic cell preparation, photoelectrochemical sensor construction, photocatalysis water decomposition hydrogen manufacturing, photocatalytic organic pollutant degrading and the like.

The invention relates to the technical field of graphene composite materials, in particular to a graphene oxide loaded copper sulfide composite material preparation method. The method includes steps:(1) proportionally weighing graphene oxide rGO, copper nitrate CuNO3 and sodium sulfide Na2S into a solvent, transferring solution into a sealed beaker, and stirring to obtain mixed solution; (2) transferring the mixed solution obtained in the step (1) into a hydrothermal reaction kettle, putting the hydrothermal reaction kettle in a drying oven at a temperature of 160-280 DEG C, and performing hydrothermal reaction; (3) centrifugally cleaning a hydrothermal reaction product obtained in the step (2) in a centrifuge, and drying the product in a drying box; (4) adding the product obtained in thestep (3) into a tube furnace, performing programmed temperature rise until a final temperature of 600-1000 DEG C is achieved, and after heat preservation, sintering with argon as shielding gas to realize carbonization, so that the target composite material is obtained.

The invention discloses a preparation method of a two-dimensional nano electrode material which is free of noble metal doping, low in cost, easy to prepare and high in electrooptic activity, and belongs to the technical field of novel nano functional materials and green energy. The method comprises the steps that a copper doped titanium dioxide nanosheet material is composited in situ on a molybdenum disulfide nanosheet of a copper intercalation layer, and the two-dimensional nano composite material Cu-TiO2/MoS2 is obtained by in-situ compositing molybdenum disulfide with copper doped titanium dioxide nano blocks through a one-pot method. The prepared Cu-TiO2/MoS2 can be applied to the fields of solar energy photovoltaic cell preparation, photoelectrochemistry sensor construction, photocatalytic water splitting for hydrogen production, photocatalytic degradation of organic pollutants and the like.

The invention provides a hafnium diboride-zirconium diboride-based high-temperature solar energy absorbing coating and a preparation method thereof. The hafnium diboride-zirconium diboride-based high-temperature solar energy absorbing coating is composed of two layers of films and sequentially comprises an absorbing layer and an anti-reflection layer upwards from the substrate surface; and the absorbing layer is constituted by a composite ceramic thin film prepared from hafnium diboride, hafnium dioxide, zirconium diboride and zirconium dioxide, and the anti-reflection layer is constituted byaluminum oxide. The hafnium diboride-zirconium diboride-based high-temperature solar energy absorbing coating provided by the invention has the high visible-infrared spectrum absorptivity, the low infrared spectrum emissivity and good heat stability, a preparation process of the coating is simple and convenient, operation is convenient, control is easy, and the production period is shortened.

The invention discloses a crushing and sorting device for an integrated circuit board. The crushing and sorting device comprises a material rolling mechanism, a vibration mechanism, a conveying belt, a fixing table, a material turning mechanism and a material scraping plate; the material rolling mechanism is provided with a material rolling barrel, a roller and an opening and closing plate, and the roller is installed in the material rolling barrel and used for rolling and stirring crushed materials; the vibration mechanism is arranged at the bottom of the material rolling mechanism, the vibration mechanism is provided with a vibration frame, a grid plate and a knocking stick, and the vibration frame is located below the material rolling barrel; the rear end of the grid plate is movably connected with the vibration frame; the rear end of the knocking stick is movably connected with the grid plate; the conveying belt is arranged at the bottom of the vibration frame and is used for conveying the crushed materials; and an adsorption plate is arranged on the conveying belt, the right end of the adsorption plate is movably connected to the right side of the conveying belt, and a magnetic adsorption plate is arranged at the bottom of the adsorption plate. The crushing and sorting device has the advantages of being rapid in continuous material separation, good in separation effect and free of doping.

The invention belongs to the technical field of foundation detection, and particularly relates to a detection device based on a foundation and a detection method thereof. The invention provides the following scheme that the detection device comprises a portal frame and a detection box, a first air cylinder is fixedly connected to the outer wall of the top of the portal frame, an adjusting plate is fixedly connected to the outer wall of the bottom of the first air cylinder, a first motor is fixedly connected to the outer wall of the bottom of the adjusting plate, and an output shaft of the first motor is fixedly connected with a rotating rod through a coupler. By arranging a fixing ring, a hanging rod, a annular plate, a hanging rope and a loosening ball, vibration generated in the working process of the first motor is large, the influence of vibration on the overall stability of the portal frame is obvious, in the working process of the first motor, the hanging rope is driven to shake, the loosening ball below the hanging rope uninterruptedly collides with the ground, and vibration of the first motor is converted into impact, so that ground soil tends to be loose, the descending resistance of the rotating rod is reduced, and meanwhile, the stability of the portal frame in the using process can be improved.

The invention discloses SiC crystal whisker enhanced Sn-Bi series solder which comprises the following components in part by weight: 3-6 parts of SiC crystal whisker and 40-80 parts of Sn-Bi series microalloy powder, wherein the Sn-Bi series microalloy powder comprises the following components in percentage by mass: 35.9-57.5% of Bi, 0.3-0.6% of In, 0.01-0.05% of Cu, 0.005-0.009% of Zn, 0.001-0.003% of Pt, 0-0.003% of Y, 0.001-0.005% of Ce, 0.0005-0.0009% of Cd, 0.0001-0.0005% of Co and the balance of Sn and unavoidable impurities. The invention further discloses a preparation method of the SiC crystal whisker enhanced Sn-Bi series solder. The SiC crystal whisker enhanced Sn-Bi series solder prepared through the preparation method disclosed by the invention has high wettability to a matrixand has high mechanical performance.

The invention belongs to the field of chromatographic analysis and particularly relates to an integrated thin-layer chromatography plate paving instrument. The specific structure of the integrated thin-layer chromatography plate paving instrument comprises a conveying device, a chromatography plate conveying area, a material paving area and a drying area. The integrated thin-layer chromatography plate paving instrument integrates raw material grinding, plate paving and drying, influence on follow-up experiments can be greatly reduced, and meanwhile labor force and time are saved, so that the plate paving process is finished in high efficiently and high quality.

The invention discloses an ultrathin Bi4O5Br2/Bi2O2CO3 visible-light-induced photocatalyst, a preparation method and application thereof. The ultrathin Bi4O5Br2/Bi2O2CO3 visible-light-induced photocatalyst is prepared by a simple room-temperature co-crystallization method. The preparation method comprises the following steps: (1) adding ammonia water into water, and stirring to obtain a solution A; (2) adding a certain amount of potassium bromide or sodium bromide into the solution A, and stirring for a period of time to obtain a solution B; (3) dissolving a bismuth salt into a dilute acetic acid solution, dropwise adding into the solution B, and stirring overnight to obtain a turbid liquid C; and (4) centrifuging, washing and drying the turbid liquid C to obtain the visible-light-inducedphotocatalyst. According to the invention, the photocatalyst has very high removal efficiency and light stability on refractory toxic and harmful organic pollutants under the neutral room-temperaturevisible light condition, and has a very good solid-liquid separation effect.

The invention relates to the technical field of graphene composite materials, in particular to a preparation method of a graphene oxide-supported silver-palladium composite material. The preparation method comprises the following steps: dissolving graphene oxide (GO), tetrachloroalloy acid (HAuCl4) and palladium nitrate (PbNO3) in a solvent according to a certain order and ratio, wherein the massratio of the graphene oxide to the tetrachloroalloy acid to the palladium nitrate is 1:1:1-8:4-1, placing the mixed solution in a water bath for water bath treatment, then centrifuging, washing and drying a reaction product subjected to the water bath treatment. The preparation method has the beneficial effects that the graphene oxide-supported silver-palladium composite material is prepared by using the method which is environmentally-friendly, simple in preparation process and low in cost, and easily realizes the commercial production.