19results about How to "Preparation method green" patented technology

The invention discloses a biomass porous carbon electrode material, a preparation method thereof and application of the biomass porous carbon electrode material in a room-temperature sodium-sulfur battery, and belongs to the technical field of preparation of a room-temperature sodium-sulfur battery positive electrode material.The biomass waste is pretreated and then pre-carbonized, then a pore-forming agent is added for mixing, ball milling and activation, a hydrochloric acid solution is added, heating and stirring are conducted, and cleaning and suction filtration are conducted to obtain the biomass porous carbon electrode material. And mixing the biomass porous carbon material with sulfur powder, and carrying out heat treatment so as to obtain the biomass porous carbon electrode material. The positive electrode is activated by a chemical reagent, has a multi-stage pore structure and inhibits the volume expansion of the positive electrode in a physical mode. According to the present invention, the large pores are beneficial to the passing of electrolyte ions, the mesopores can ensure the high sulfur loading amount, and the small pores can provide the extremely high specific surface area and the large adsorption volume, such that the shuttle effect caused by the conversion of the polysulfide in the room temperature sodium-sulfur battery can be effectively solved, and the actual specific capacity and the rate capability of the room temperature sodium-sulfur battery can be improved;

The CSHS reaction device comprises a liquid phase conveying system, a reaction system, a temperature control system and a sample collection system, the liquid phase conveying system consists of three same high-pressure conveying pumps for liquid chromatography, corresponding liquid phase pipelines and adapters; the reaction system consists of two sets of electric heating devices, corresponding liquid phase pipelines and adapters; the temperature control system controls the two sets of electric heating devices to enable the electric heating devices to be subjected to programmed temperature rise and stabilize the temperature to be 400 DEG C or above; and the sample collection system consists of a water cooling device, a filter and a back pressure valve. The CSHS reaction device is applied to preparation of a semiconductor H2S sensing material, is good in structural consistency and excellent in sensing performance, and can meet application requirements.

The application discloses a preparation method and application of a pyridine derivative compound, belongs to the technical field of chemical synthesis, and has the structural formula as shown in the following formula: wherein the R1 group is one of 4-CH3, 4-OCH3, 4-F, 4-Cl and 4-Br; the R2 group is one of -C5H9 and -C6H 11 ; and the R3 group is one of 3-F, 3-H and 3-CH3. The pyridine derivative compound prepared by the application has a pyridine ring as a structural center and has very important medicinal value and is widely applied in the fields of antitumor, anticancer, antibacterial and other biological medicines.

The application belongs to the technical field of methanol preparation, and particularly relates to a device and a preparation method for preparing methanol by combining carbon dioxide hydrogenation with chemical chain combustion, which comprises a power generation system, an electrolytic cell, a chemical chain combustion reactor, a pure oxygen supplement combustion chamber and a methanol reaction unit. The power generation system is connected with the electrolytic cell. Oxygen generated by electrolysis of the electrolytic cell is connected with the chemical chain combustion reactor through a first pipeline. Oxygen generated by electrolysis of the electrolytic cell is connected with the pure oxygen supplement combustion chamber through a second pipeline. The chemical chain combustion reactor is connected with a raw material pipeline. The top of the chemical chain combustion reactor is connected with the pure oxygen supplement combustion chamber through a third pipeline. The pure oxygen supplement combustion chamber is connected with the methanol reaction unit through a fourth pipeline. Hydrogen generated by electrolysis of the electrolytic cell is connected with the methanol reaction unit through a fifth pipeline. Reaction products are discharged through a sixth pipeline.

The application discloses a kind of protein sponges of fast hemostasis and preparation method and application thereof.The protein sponge is prepared by modified protein irradiation crosslinking, and the structural formula of the modified protein is as shown in formula I: R1 is substituted alkyl;Substituted substituent group of substituted alkyl is selected from one or more of carboxyl, carbonyl, amido, amino, ester group;R2 is group containing carbon-carbon double bond;Substitution degree of R2 is 10%~80%;Substitution degree of R1 is 5%~20%.The present application introduces carbon-carbon double bond group and hydrophilic group at the primary amine position of protein, imparts the crosslinking ability of protein and enhances the hydrophilic performance of protein, by limiting the substitution degree of R1 and R2, the rate of protein sponge gelation after water absorption is regulated, and the controllable adjustment of sponge skeleton swelling speed and sponge channel contraction is realized.Compared with existing sponge, the protein sponge of the present application has good flexibility, more excellent efficiency of enriching blood clotting components, and low risk of rebleeding.

The invention discloses a protein-based adsorbent for selectively adsorbing metal rhenium ions and its application. The adsorbent is obtained by encapsulating alkylamine or ammonium salt in a phase transition aggregate formed by reducing protein with a reducing agent. The method of using the adsorbent is to put the adsorbent into a mixed solution containing rhenium and molybdenum to achieve selective adsorption of rhenium. The preparation and use methods of the adsorbent are simple, environmentally friendly, recyclable, and have a high selective adsorption capacity for rare metal rhenium. The adsorbent can be used for the separation of rhenium and molybdenum in industrial wastewater and ore leachate, and after adsorption-desorption cycles, it still has a high adsorption ratio.

The invention relates to the field of synthesis of pyrazolone, and provides a method for synthesizing a pyrazolone structure by utilizing carbon dioxide aiming at the problem that an expensive transition metal catalyst and high-toxicity carbon monoxide are needed for synthesizing pyrazolone by utilizing carbonylation reaction, and the reaction formula is as follows: # imgabs0 # reaction conditions are as follows: in the presence of carbon dioxide, in an organic solvent and under the action of alkali, the reaction is carried out for 1-3 hours, so that the pyrazolone structure is synthesized by utilizing carbon dioxide. And reacting the compound II with carbon dioxide to obtain the pyrazolone structure. According to the method, the pyrazolone structure is synthesized in a green and efficient manner by utilizing carbon dioxide.

The invention belongs to the field of new material synthesis and technology, and discloses a squaric acid complex-derived ferronickel-based double-metal hydroxide, a preparation method thereof and an electrode comprising the squaric acid complex-derived ferronickel-based double-metal hydroxide. The surface of the squaric acid complex-derived nickel-iron-based double-metal hydroxide has a natural pore structure, so that hydroxyl ions in an electrolyte, protons separated from a reaction intermediate and product oxygen molecules can be promoted to be quickly transferred and transmitted, and relatively high catalytic activity and long-term high-current stability can be maintained. The preparation method of the squaric acid complex-derived nickel-iron-based double-metal hydroxide is green, simple, convenient and efficient. The electrode comprising the squaric acid complex-derived nickel-iron-based double-metal hydroxide is expected to overcome severe conditions in a large-current environment, and has important practical significance for realizing large-scale development of preparing green hydrogen by electrolyzing water.

The present invention discloses a preparation method of a layered α-zirconium phosphate (α-ZrP) doped composite gel material and its heavy metal ion adsorption application, which relates to the field of water pollution control. The purpose of the present invention is to solve the problems of low selectivity for copper ions, low adsorption capacity, poor mechanical strength, complex production process and high cost of existing copper ion hydrogel adsorbents. Method: (1) prepare a few layers or a single layer of α-ZrP powder filler; (2) add it to a gelatinized liquid of starch and sodium carboxymethyl cellulose (CMC); (3) add the mixed solution to a cross-linking solution for cross-linking; (4) crush it with a blender, soak it in ethanol, and vacuum dry it to obtain an α-ZrP doped composite gel material for use as a copper ion adsorbent, which has good mechanical strength and stability; for heavy metal copper ion adsorption, it has the characteristics of fast, high efficiency and high adsorption capacity.

The present invention discloses a method for preparing a fuel cell membrane electrode catalyst layer, belonging to the field of fuel cell technology. The preparation method firstly mixes a catalyst and resin particles to form a catalyst layer powder, the powder is charged and adsorbed on the surface of a transfer substrate under the action of high voltage electricity, and then transferred to the membrane surface under heating conditions to form a catalyst layer, and finally the catalyst layer is further cured by hot pressing. Compared with the traditional wet method for preparing a fuel cell membrane electrode catalyst layer, the preparation method of the present invention does not use any organic or inorganic solvents, thus avoiding problems such as membrane swelling, environmental pollution, solvent waste and extra energy consumption.

The synthesis method comprises the following steps: performing epoxidation reaction on a compound IN1 to obtain a 3-position epoxy isomer mixture IN2, then adding the IN2 into petroleum ether or methanol, stirring, filtering to remove non-target configurational isomers, concentrating filtrate, cooling, and separating out solids to obtain an epoxy product; the structural formulas of the compounds IN1 and IN2 are as follows: # imgabs0 # imgabs1 #. According to the preparation method, a dangerous and expensive aluminum reagent is avoided, isomer impurities are removed through improvement of the method, the preparation method is green and safe, part of steps can be directly put into the next reaction step without purification, the operation is simple, and the preparation method is suitable for industrial production.

The invention belongs to the technical field of methanol preparation, and particularly relates to a device for preparing methanol through carbon dioxide hydrogenation in combination with chemical looping combustion and a preparation method.The device comprises a power generation system, an electrolytic tank, a chemical looping combustion reactor, a pure oxygen afterburning chamber and a methanol reaction unit, oxygen generated by electrolysis of the electrolytic tank is connected with the chemical-looping combustion reactor through a first pipeline, the oxygen generated by electrolysis of the electrolytic tank is connected with the pure oxygen afterburning chamber through a second pipeline, the chemical-looping combustion reactor is connected with a raw material pipeline, and the top of the chemical-looping combustion reactor is connected with the pure oxygen afterburning chamber through a third pipeline. The pure oxygen afterburning chamber is connected with the methanol reaction unit through a fourth pipeline, hydrogen generated by electrolysis of the electrolytic tank is connected with the methanol reaction unit through a fifth pipeline, and a reaction product is discharged through a sixth pipeline.

The present application discloses a carbon-doped aluminum-based adsorbent and a preparation method thereof. 0.8 g of aluminum salt and 40-300 mL of a carbon source are fully stirred with a magnetic stirrer to obtain a pretreatment solution; the pretreatment solution is placed in a high-pressure reactor, and a hydrothermal method is used to react for 1-4 hours at 90-120 degrees Celsius to obtain an aluminum-based defluorinating agent; the aluminum-based defluorinating agent is washed and dried to obtain the carbon-doped aluminum-based adsorbent; the aluminum-based defluorinating agent of the present invention has the characteristics of high adsorption capacity, high selectivity, high acid and alkali applicability, reusability, good resistance to anion interference, low cost, etc.; it can quickly and efficiently remove fluoride ions in water, and is suitable for having a high adsorption capacity for fluorine between pH 3 and 12; the preparation method is simple, green, low-cost and environmentally friendly; the adsorption capacity of the aluminum-based defluorinating agent is greater than 600 mg / g, and can be used for removing fluoride ions from different types of water samples such as groundwater, tap water, and industrial wastewater.

The invention relates to the field of nano material preparation, in particular to a Mo2CTx two-dimensional material and a preparation method and application thereof. According to the preparation method of the Mo2CTx two-dimensional material, Mo2Ga2C is etched through a simple one-step hydrothermal reaction, a non-toxic reagent ammonium fluoride is utilized, a MAX precursor is etched on a large scale through a one-step method, the Mo2CTx two-dimensional material is prepared, the preparation process is simple, large-scale production is easy, safety and reliability are achieved, and strong acid, strong base or a chemical intercalator does not need to be introduced; the obtained Mo2CTx two-dimensional material is smooth in surface appearance and few in defect, has high crystallinity similar to that of Mo2Ga2C, has application prospects in multiple fields such as energy storage and catalysis, and particularly promotes practical application of an MXene material in the field of new energy.

The application relates to the technical field of organic pollutant degradation, and discloses a preparation method of a copper iron sulfide bimetallic catalyst, which comprises the following steps: under anaerobic conditions, copper chloride and iron powder are added into an acid buffer solution, a sodium sulfide solution is added after the mixture is uniformly mixed, and the copper iron sulfide bimetallic catalyst is obtained after reaction and filtration; the molar ratio of the copper chloride and the iron powder ranges from 0.3 to 1.3; and the molar ratio of the sodium sulfide and the iron powder ranges from 0.046 to 0.46. The copper iron sulfide bimetallic catalyst containing the main component CuFeS2 is prepared by exploring the feeding molar ratio of copper, iron and sulfur. The catalytic performance of the copper iron sulfide bimetallic catalyst prepared by the method is effectively improved. After the copper iron sulfide bimetallic catalyst is used to treat organic wastewater, the removal efficiency of the organic matter is maintained stable, and there is no leaching of metal Cu and Fe. The catalyst has the advantages of low treatment cost, simple operation condition and high efficiency, and provides a new method for low-carbon treatment of organic wastewater.

The invention discloses a porous carbon material and a template-free preparation method thereof. The specific surface area of the porous carbon material is not less than 500 m < 2 > / g, and the total content of pyrrole nitrogen and pyridine nitrogen accounts for not less than 85% of the total nitrogen element; the method comprises the following steps: dissolving carboxylated chitosan and glucosamine hydrochloride in water to obtain a mixed solution; carrying out hydrothermal reaction on the mixed solution to form a hydrogel precursor with a gap structure; and drying the precursor, and carrying out carbonization treatment in an inert atmosphere to finally obtain the porous carbon material rich in pyrrole nitrogen and pyridine nitrogen. The method does not need to use any template agent and etching agent, and is simple in process, low in cost, green, environment-friendly and easy for large-scale production. The porous carbon material prepared by the invention has high specific surface area and high content of electrochemical active nitrogen species, and the lithium ion battery silicon-carbon negative electrode material prepared by taking the porous carbon material as a substrate shows excellent electrochemical performance.

The invention discloses a preparation method and application of a pyridine derivative, and belongs to the technical field of chemical synthesis, the structural formula of the pyridine derivative is shown as follows: in the # imgabs0 # formula, the R1 group is one of 4-CH3, 4-OCH3, 4-F, 4-Cl and 4-Br; the R2 is one of-C5H9 and-C6H11, and the R3 is one of-C6H9 and-C6H11; the R3 group is one of 3-F, 3-H and 3-CH3; the pyridine derivative prepared by the invention takes a pyridine ring as a structural center, has very important medicinal value, and has wide application in anti-tumor, anti-cancer, antibacterial and other biological medicines.

The present application provides a preparation method of a cellulose-based fluorescent material. The method comprises: esterifying propynoic acid with cellulose to obtain fluorescent cellulose propynoate, and then performing cross-linking reaction with a polyhydroxy compound to prepare cross-linked fluorescent cellulose; or esterifying propynoic acid with a polyhydroxy compound to obtain fluorescent polyhydroxy propynoate, and then performing cross-linking with cellulose to prepare cross-linked fluorescent cellulose. The reaction process is green and efficient, and the cellulose-based fluorescent material with stable fluorescent properties can be realized without additional addition of a fluorescent agent; the cellulose-based fluorescent material can be used in the fields of composite materials, optics, anti-counterfeiting and the like.

The invention discloses a preparation method and application of a functional bacterial cellulose nanofiber membrane for specific detection of microorganisms. The preparation method comprises the following steps: firstly, taking a carboxyl-containing glucose derivative as a functional carbon source monomer, and blending the carboxyl-containing glucose derivative with a glucose monomer according to a certain proportion; a surface carboxyl modified bacterial cellulose nanofiber membrane is obtained through acetobacter xylinum catalytic biological copolymerization, and then functional sugar molecules containing amido and carboxyl chemical bonds on the surface of the membrane are coupled through a chemical catalytic coupling reaction, so that the surface glycosyl modified bacterial cellulose nanofiber membrane is obtained. The glycosylated bacterial cellulose nanofiber membrane obtained by the method disclosed by the invention has a remarkable specific affinity adhesion characteristic on specific bacteria, has an excellent non-specific adhesion resistance characteristic on other bacteria, and can be successfully used for bacteria specificity detection by a filter membrane method. The preparation method of the glycosylated bacterial cellulose nanofiber membrane is simple and green, the surface glycosyl grafting amount is controllable, and the glycosylated bacterial cellulose nanofiber membrane has excellent biological nonspecific adhesion resistance, has remarkable specific adhesion and affinity enrichment characteristics on specific bacteria, and has wide application prospects in the field of efficient detection of bacteria specificity through a filter membrane method.