65results about How to "Efficient processing technology" patented technology

The invention provides an Ag/g-C3N4 composite photocatalyst and a preparation method thereof. The preparation method comprises the following steps: putting melamine into a muffle furnace to roast according to a roasting procedure, and taking out the melamine to grind after finishing roasting; then roasting powder with the same procedure to obtain g-C3N4; then putting the g-C3N4 into a beaker containing deionized water and NaOH to perform mechanical stirring to obtain a mixed solution A; transferring the mixed solution into a reaction kettle to perform thermal reaction at constant temperature; after finishing reaction, washing a solid product by using deionized water and ethyl alcohol when the mixed solution drops to room temperature, and drying to obtain g-C3N4 nanosheets; putting the g-C3N4 nanosheets and AgNO3 into the deionized water to stir to obtain a mixed solution B; then putting the mixed solution B under an ultraviolet lamp to irradiate and reduce the AgNO3, after finishing reaction, when the mixed solution B drops to the room temperature, washing a solid product by using the deionized water and the ethyl alcohol, drying to obtain the Ag/g-C3N4 composite photocatalyst. By the Ag/g-C3N4 composite photocatalyst provided by the invention, the purpose of degrading antibiotic wastewater by using Ag/g-C3N4 as a catalyst is realized.

The invention discloses a method for recycling micro-nano copper powder from waste printed circuit boards. The method comprises the following steps: taking CuSO4.5H2O-NaCl-H2SO4 as an electrolytic system, taking a stabilizer or ionic liquid as an additive, and directly separating metals and nonmetals from the waste printed circuit boards in one step through an electrodynamic method, wherein the separation rate can reach 95.6% or higher; the recycled metal powder is free of nonmetals; the shape, the crystal form and the particle size of the recycled copper powder can be controlled by adjusting the types and the usage amount of the additives; the stabilizer PVP is added; the particle size of the copper powder is less than 100nm; the purity can reach 99% or higher; the ionic liquid [BSO3HMIm]HSO4 is added; the recycled copper powder is of dendritic crystal shape; the added ionic liquid [BSO3HPy]HSO4 is a spheroidal anno Cu/Cu<2+1>O composite material; the prepared copper powder can be used as a lithium-ion battery negative material and has high theoretical capacity and high safety performance; the metal phase Cu mixed in the copper powder particles can also improve the electronic conductivity of the nanoparticles.

The present invention relates to a preparation method and application for a g-C3N4-TiO2/HNTs composite photocatalyst. The method comprises the following steps: n-butyl titanate and absolute ethyl alcohol are added into a beaker, and magnetic stirring is performed to form a uniform solution; glacial acetic acid is added, and magnetic stirring is performed; halloysite is added into the above solution, and stirring is continued to obtain a suspension liquid; deionized water and absolute ethyl alcohol are mixed, the mixed liquid is slowly added into the suspension liquid, and stirring is performedcontinuously to form a sol-gel; the sol-gel is placed into a drying oven, and drying is performed; the obtained xerogel is ground into powder, the powder is put into a muffle furnace, calcination isperformed, washing is performed, centrifugation is performed, drying is performed, the dried material is ground into powder, and therefore TiO2/HNTs is obtained; melamine is weighed, the weighed melamine and the TiO2/HNTs are mixed, grinding is performed fully, the obtained material is put into a muffle furnace, calcination is performed, natural cooling is performed to a room temperature, taking out the cooled material, the cooled material is ground into powder, and therefore the final product is obtained. According to the invention, the purpose of degrading antibiotic wastewater by taking theg-C3N4-TiO2/HNTs nano composite material as the photocatalyst is realized.

The invention belongs to the technical field of environment material preparation and particularly relates to bamboo stem biochar quantum dot modified Bi4Ti3O12 composite photocatalyst preparation andapplication. A bamboo stem biochar quantum dot modified Bi4Ti3O12 composite photocatalyst preparation method includes: firstly, taking bamboo stem powder as a carbon source to synthesize bamboo stem biochar quantum dot according to a hydrothermal method; secondly, calcining bismuth oxide and P25 in a tube furnace/muffle furnace to obtain a Bi4Ti3O12 material; finally, adding bamboo stem biochar quantum dots and Bi4Ti3O12 into a certain quantity of ethyl alcohol, ultrasonically treating, evaporate to dry ethyl alcohol, and calcining in the tube furnace to obtain a bamboo stem biochar quantum dot modified Bi4Ti3O12 composite photocatalyst. By adoption of bamboo stems as a biochar source for preparing the bamboo stem biochar quantum dots according to a one-step hydrothermal method, compared with a traditional process, the method has advantages of greenness, economy and environmental friendliness; the composite photocatalyst prepared according to the method is capable of effectively makinguse of visible light to degrade ciprofloxacin in antibiotic wastewater and has a promising application prospect in ciprofloxacin wastewater treatment.

The invention belongs to the technical field of environmental material preparation, and relates to a preparation method and applications of a nitrogen doped reduced graphene oxide supported CdTe/CdS heterojunction composite photocatalyst. The preparation method comprises following steps: (1) preparing nitrogen doped reduced graphene oxide (N-Rgo); (2) preparing CdTe nano particles; and (3) preparing a CdTe/CdS/N-rGO composite photocatalyst. CdTe and CdS semiconductors are used to establish heterojunction, and then N-rGO is loaded to prepare the photocatalyst, which can be used to degrade wastewater containing 2,4-dichlorophenol.

The invention relates to preparation and application of a metal ion doped CdSe quantum dot photocatalyst, and belongs to the technical field of environmental material preparation. The preparation of the metal ion doped CdSe quantum dot photocatalyst comprises the following steps: (1) preparation of an NaHSe precursor solution, namely putting Se powder and sodium borohydride into a glass reaction bottle, adding deionized water, and carrying out magnetic stirring reaction; and (2) preparation of the metal ion doped CdSe quantum dot photocatalyst, namely adding cadmium chloride, metal ion chloride and stabilizing agents by taking deionized water as a solvent, adjusting the pH value of the solution after stirring fully, injecting an NaHSe precursor solution again, removing oxygen by introducing nitrogen, pouring into a high-pressure reaction kettle and heating after flocculent is generated in the solution, taking out, cooling naturally, centrifuging, washing, putting into a baking oven, and drying, thereby obtaining the metal ion doped CdSe quantum dot photocatalyst. According to the preparation disclosed by the invention, the aim of degrading antibiotic wastewater by taking the metal ion doped semiconductor quantum dots as the photocatalyst is reached.

The invention discloses a magnetic fiber membrane supported photocatalyst for wastewater treatment and a preparation method thereof. The magnetic fiber membrane supported photocatalyst is obtained bythe following steps: a, preparing a magnetic fluid solution containing graphene and magnetic particles; b, preparing a polymer solution; c, mixing the magnetic fluid solution with the polymer solutionto form a spinning precursor solution; d, performing electrospinning to obtain a magnetic graphene polymer fiber membrane; e, adding cadmium acetate, thioglycolic acid and cadmium sulfide into waterfor a reaction, adding the fiber membrane, and continuing the reaction to obtain the magnetic graphene polymer fiber membrane supported cadmium sulfide quantum dot photocatalyst. The method has the benefits that the separation of photogenerated electrons and photoinduced holes is greatly enhanced by adding the magnetic graphene polymer fiber membrane, and the photocatalyst has high photocatalyticactivity, high adsorption capacity and high adsorption speed in wastewater treatment, is convenient to operate, low in cost, easy to separate and recycle and environmentally-friendly, and can be widely used in sewage treatment.

The invention relates to an oil-resistant silicon rubber and a preparation method thereof by in-situ reaction. The oil-resistant silicon rubber is composed of the following components in parts by weight: 100 parts of silicon rubber, 30-50 parts of white carbon black, 1-5 parts of hydroxy silicon oil, 5-20 parts of polar monomer with active group and 0.5-3 parts of crosslinking agent. The preparation method comprises the following steps: mechanically blending to uniformly disperse the silicon rubber base, white carbon black, hydroxy silicon oil, polar monomer with active group and crosslinking agent, and carrying out in-situ reaction on the compounded rubber at 110-180 DEG C to obtain the oil-resistant silicon rubber material. By adopting the in-situ reaction method, the generated polar polymer phase can be uniformly dispersed in the silicon rubber base, thereby solving the problem that the two phases can not be easily dispersed when the silicon rubber and polar polymer are directly blended to prepare the oil-resistant rubber material. The silicon rubber material prepared by in-situ reaction has favorable oil resistance.

The invention belongs to the technical field of catalytic material preparation, and particularly relates to a magnetic Fe2O3/BN composite material and a preparation method and an application thereof.The positive-valent iron ions are adsorbed on BN by utilizing electronegativity of the surface of BN, so that the magnetic Fe2O3/BN composite material is prepared by a one-pot method and is applied toremoval of antibiotic residues in a water body. The synthesis method is simple, and the prepared magnetic Fe2O3/BN composite material has good magnetism and is easy to recycle. In a photocatalysis experiment, the magnetic Fe2O3/BN composite material shows degradation activity superior to that of a monomer. The material can be used as a catalyst for PDS activation; peroxydisulfate (PDS) is subjected to photo-synergistic activation to remove wastewater pollutants, free radicals with strong oxidizing ability generated by PDS activation and free radicals generated by photocatalytic excitation ofFe2O3 realize dual-promotion catalytic action, and application of the iron-based composite material in the field of photocatalysis and in the aspect of PDS activation is further developed.

The invention relates to a hydrogenated titanium dioxide composite three-dimensional ballflower-shaped bismuth oxychloride photocatalyst, and a preparation method and an application thereof, and belongs to the technical field of preparation of environment materials. The preparation method comprises the following steps: weighing a quantitative amount of bismuth nitrate pentahydrate, adding acetic acid, performing magnetic stirring to achieve uniform mixing, adding methanol, continuously performing stirring to form a stable solution, adding glucosamine hydrochloride, performing stir until the glucosamine hydrochloride is completely dissolved, then adding hydrogenated titanium dioxide, performing uniform stirring, transferring the obtained mixed solution system into a reaction kettle, heatingthe reaction kettle in an oven, taking out and naturally cooling the reaction kettle after the heating is finished, respectively washing the obtained reaction product with deionized water and ethanolthree times, and placing and drying the washed reaction product in the oven to obtain the hydrogenated titanium dioxide composite three-dimensional ballflower-shaped bismuth oxychloride photocatalyst. The purpose of degrading antibiotic wastewater by the hydrogenated titanium dioxide composite three-dimensional ballflower-shaped bismuth oxychloride photocatalyst is achieved in the invention.

The invention belongs to the technical field of environmental material preparation and relates to a preparation method and an application of a CQDs/CdIn2S4/N-rGO multi-dimensional photocatalyst. The preparation method comprises the following steps: (1) preparing nitrogen doped reduced graphene oxide N-rGO; (2) preparing flower-like CdIn2S4; (3) preparing CQDs; (4) preparing CdIn2S4/N-rGO; (5) preparing a CQDs/CdIn2S4/N-rGO compound photocatalyst. According to the invention, the purpose of degrading 2,4-dichlorophenol wastewater by using CQDs modified flower-like CdIn2S4 semiconductor loaded N-rGO as photocatalyst is achieved.

The invention relates to processes of synthesizing Bi<12>TiO<20> by a solid state method, synthesizing bamboo biochar with embedded CdSe quantum dots by a water bath method and preparing a composite photocatalyst of bamboo biochar with embedded CdSe quantum dots and Bi<12>TiO<20> by a dipping method. The invention belongs to the technical field of ecomaterial preparation. The preparation method provided by the invention comprises preparation of bamboo biochar, preparation of the bamboo biochar with embedded CdSe quantum dots and preparation of Bi<12>TiO<20>. The specific steps are as follows: taking deionized water as a solvent and adding cadmium chloride, biochar and a stabilizer; performing stirring and adjusting the pH value of the solution; injecting a NaHSe precursor solution; introducing nitrogen gas; pouring the obtained solution into a three-mouth flask and performing heating; performing natural cooling; performing centrifugation, performing washing and drying to obtain the material of bamboo biochar with embedded CdSe quantum dots; soaking Bi<12>TiO<20> and the obtained material of bamboo biochar with embedded CdSe quantum dots into methanol; performing strong stirring; and performing drying to obtain the composite photocatalyst. The composite photocatalyst of the bamboo biochar with embedded CdSe quantum dots and Bi<12>TiO<20> prepared by the method provided by the invention can effectively use visible light to degrade tetracycline in antibiotic wastewater.

The invention discloses a defatted facial mask paper processing technology. The technology comprises the following steps: putting fresh defatted rice bran into a microwave drying oven, heating the bran for 90s under the microwave power of 650w, and carrying out stabilizing treatment; putting the stabilized rice bran into an ultrafine grinder, and performing grinding for 30 minutes; taking agar powder and guar gum, and adding hot water of 60 DEG C for full dissolving to obtain a standby solution; mixing the defatted rice bran with corn modified starch, adding purified water which is 20 times byweight of the defatted rice bran, heating a mixture to 90 DEG C while stirring at a constant speed, and performing uniform mixing; and pouring the homogenized solution into a mold for molding. Materials are crushed through a crushing device, crushed materials can directly fall into a material storage cavity from a first sieve plate and a second sieve plate; a screening beating block vibrates materials on the second sieve plate to fall off, screening holes are prevented from being blocked, when the materials are crushed, a guide plate plays a role in guiding the falling materials, the materials are prevented from being discharged to corners, meanwhile, the materials stored in a material groove are stirred, and the quality of the materials is guaranteed.

The invention belongs to the technical field of preparation of environment-friendly materials and relates to a preparation method of a MoS2/Bi2O3 p-n heterojunction photocatalyst. The preparation method comprises the specific steps: first, preparing MoS2 and Bi2O3; then dissolving MoS2 and Bi2O3 in ethanol; stirring the mixture and carrying out ultrasonic treatment; transferring the mixture to a stainless steel high pressure kettle; sealing the stainless steel high pressure kettle and setting a certain temperature to react; after the reaction, cooling the mixture to room temperature; centrifugalizing and collecting a solid product; then washing the solid product with absolute ethyl alcohol and deionized water; and finally, drying the solid product to obtain the MoS2/Bi2O3 p-n heterojunction photocatalyst. The MoS2/Bi2O3 p-n heterojunction photocatalyst prepared by the preparation method has good photocatalytic activity and stability, and the degradation rate to 2-mercaptobenzothiazolereaches 90% within 120 min, so that the photocatalytic degrading efficiency is improved. The preparation method is simple in operating process and relatively low in cost and is a green and environment-friendly efficient treatment technique.

The invention discloses a cigarette, a cooling and aroma-enhancing microcapsule and a preparation method and application thereof. The cooling and aroma-enhancing microcapsule comprises a wall material and content, the wall material comprises polypropylene carbonate and poly (butyl carbonate), the mass of poly (butyl carbonate) accounts for 30%-50% of the mass of polypropylene carbonate, the content is at least one of nicotine, tobacco flavor and natural extract, and the mass ratio of the content to the wall material is 1: (2-4). The cooling and aroma-enhancing microcapsules are applied to the filter stick to prepare the composite filter stick, a polylactic acid film cooling unit in the prior art is replaced, and the composite filter stick is applied to heating non-combustion cigarettes, so that the processing technology is simpler, more convenient and more efficient.

The invention relates to a heat treatment device for metal material production and processing. The heat treatment device comprises a decompression steel plate sleeper and a cabinet thermal-insulationprotection shell, wherein a rolling rail bar arranged on the upper side of the decompression steel plate sleeper, an electricity box protecting cover is arranged on the upper side of the rolling railbar, a power supply interface is embedded into one side of the electricity box protecting cover, a resistor stripe is arranged in the electricity box protecting cover, and a contact block is slidablyconnected with the upper side of the resistor stripe. A telescoping adjusting rod is installed on one side of the contact block, one side of the telescoping adjusting rod is in electric output connection with an internal antenna, a computer is arranged on one side of the internal antenna, a voice box is embedded into the other side of the electricity box protecting cover, and the voice box is in primary electric output connection with a mechanical keyboard. The heat treatment device has the benefits that the heat treatment device for metal material production and processing is provided with acomputer, and the heat treatment device has a 5G signal control function, has a good digital processing technology and improves the device operation efficiency.

The invention discloses a high-quality processing technology of a glass mold. The high-quality processing technology comprises the following steps: a, parison casting; b, rough machining; c, heating;d, spray welding; e, tempering; f, finish machining; and g, polishing. Through the manner, in the high-quality processing technology of the glass mold, a half surface is taken as a positioning reference without change, so that the production technology is greatly simplified, and the effect of saving labor, time and effort is achieved; and the processing precision is high, so that efficient, high-speed and high-quality production of a mouth mold of the glass mold is realized, the service life of the glass mold is prolonged, and good economic benefits are brought.