20 results about "Methenium" patented technology

An ionic cuprous complex with thermally activated delayed fluorescence performance, characterized in that: the ionic cuprous complex with thermally activated delayed fluorescence performance is tetrakis(3,5-bis(trifluoromethyl)phenyl)boronic acid-[bis(2-diphenylphosphinophenyl)ether]-[1,10-phenanthroline]copper(I), tetrakis(3,5-bis(trifluoromethyl)phenyl)boronic acid-[4,5-bisdiphenylphosphino-9,9-dimethylxanthene]-[1,10-phenanthroline]copper(I), tetrakis(3,5-bis(trifluoromethyl)phenyl)boronic acid-[4,5-bisdiphenylphosphino-9,9-dimethylxanthene]-[1,10-phenanthroline]copper(I), tetrakis(3, 5-Bis(trifluoromethyl)phenyl)boronic acid-[bis(2-diphenylphosphinophenyl)ether]-[4,7-diphenyl-1,10-phenanthroline]copper(I), tetrakis(3,5-bis(trifluoromethyl)phenyl)boronic acid-[4,5-bis(diphenylphosphinophenyl)ether]-[4,7-diphenyl-1,10-phenanthroline]copper(I), with complexes 1b, 2a, and 2b as luminescent dyes. These complexes have application value in the recording, storage, and protection of information.

The invention discloses a preparation method of a covalent organic framework photocatalyst for photocatalytic reduction of CO2, which comprises the following steps: adding 4, 4 ', 4' '-(1, 3, 5-triazine-2, 4, 6-triyl) triphenylamine and 2, 5-dibromobenzene-1, 2, 4, 5-tetracarboxylic dianhydride into a reaction kettle, then adding 1-hydroxy-3-methylbenzene and isoquinoline, and uniformly mixing; and carrying out microwave heating on the reaction kettle, cooling to room temperature, filtering, collecting precipitate, washing, and then carrying out Soxhlet extraction and vacuum drying to obtain the covalent organic framework photocatalyst. A surface halogen atom modification strategy is designed and used for regulating and controlling electron distribution and light capture capacity of a donor-acceptor (D-A) in TzPm-COF, and results show that the strategy can effectively improve photocatalytic activity and selectivity of reduction of CO2 into CO, and can be applied to preparation of the TzPm-COF catalyst. A reasonable design strategy is provided for developing a functional modified COFs material for efficiently and selectively photocatalytic CO2 reduction.

The invention belongs to the technical field of electrocatalysis, and discloses a chlorella electrode with redox activity and a preparation method and application thereof. Under a constant potential window, methylene blue, aniline and chlorella are synchronously subjected to electrochemical oxidation to generate free radicals, an electron transport chain between chlorella and methylene blue is constructed through a click reaction, meanwhile, an interpenetrating network structure copolymer is generated in the copolymerization process, and chlorella is wrapped and anchored on the surface of an electrode. According to the method, chlorella can be effectively dispersed, more active sites are exposed, the electron transfer efficiency is improved, and the stability of the electrode is enhanced under the interaction of the three. The obtained chlorella electrode with redox activity has an application prospect in the field of electrocatalytic reduction of carbon dioxide into high-added-value products.

This invention relates to the field of ceramic materials, specifically disclosing a high water-resistant magnesium phosphate cement-based foam ceramic and its preparation method. The foam ceramic comprises the following components: 100-150 parts magnesium phosphate cement, 1-5 parts retarder, 5-20 parts foaming agent, 1-5 parts foam stabilizer, 5-15 parts lutetium ion source, 1-8 parts methylene phosphonic acid component, and 30-60 parts water. The method includes: (1) mixing the lutetium ion source, methylene phosphonic acid component, and water to obtain a complex solution. (2) mixing the magnesium phosphate cement and foam stabilizer, then adding the complex solution to the mixture and mixing to obtain a slurry. (3) adding the foaming agent to the slurry and allowing it to stand for foaming, followed by curing to obtain the foam ceramic. This invention not only effectively reduces the solubility of magnesium phosphate cement hydration products, but also combines CO2 foaming to generate a low-solubility magnesium carbonate shell, significantly improving the long-term stability of the foam ceramic in an aquatic environment while maintaining high porosity.

The invention relates to a preparation method of methylenecyclopentane and a composition containing the methylenecyclopentane, in particular to a method for synthesizing the methylenecyclopentane by reacting substituted triphenylphosphine (such as tris (4-methoxyphenyl) phosphine and the like) with methyl iodide / methyl bromide to generate substituted methyl triphenyl phosphonium halide and then reacting with cyclopentanone through Wittig in the presence of alkali. Compared with the traditional method, the method has the advantages that the byproduct is substituted benzene (the boiling point is more than 100 DEG C), the boiling point of the substituted benzene is obviously different from that of the target product (the boiling point is 77 DEG C), methylene cyclopentane with the purity of more than 99% can be obtained through simple rectification, and the yield reaches 85-95%.

The invention belongs to the technical field of hydrometallurgy, and particularly relates to a preparation method and application of a porous rhenium imprinted composite material. According to the technical scheme, the preparation method comprises the following steps: firstly, synthesizing silicon dioxide with a porous structure in an ionic liquid mixed system, dispersing the porous silicon dioxide in a rhenium-containing ionic liquid aqueous solution, then adding N-vinyl imidazole and 4-chloromethyl styrene, adding azodiisobutyronitrile, heating and stirring at 50-70 DEG C for 10-12 hours, and cooling to room temperature; after the reaction is completed, perrhenate ions used for imprinting are washed away with a diluted hydrochloric acid solution, meanwhile, other reactants which are not polymerized and are left on the surface are washed away, and the porous rhenium imprinting composite material is obtained through drying. When the material is applied to extraction and preparation of ammonium rhenate, the purity of the obtained ammonium rhenate product can reach 99.999% or above, the used reagent is environment-friendly, and obvious social benefits and economic benefits are achieved.

The present invention discloses a process for the continuous catalytic hydrogenation of MDA, and specifically discloses an apparatus and a process for the hydrogenation of methylenediphenylamine (MDA) using a hydrogen donor, where i) comprises a collection circuit for a closed first media circuit, a heat exchanger incorporated as at least one heat source into a heat exchanger of a main reactor and / or a separation unit, and a first evaporator, ii) comprises an intermediate circuit for a closed second medium circuit in which the first evaporator, the at least one compressor and the second evaporator are incorporated, and iii) comprises at least one distributor circuit for a closed third medium circuit in which the first evaporator, the at least one compressor and the second evaporator are incorporated, wherein the at least one heat exchanger of the reactor unit, the at least one heat exchanger of the conditioning unit and / or the at least one heat exchanger of the separating unit are combined as a heat sink in a heat exchange manner. The apparatus and process are improved in terms of product conversion and energy efficiency.

The invention relates to a preparation method of a perovskite quantum dot with a multi-fluorine passivation layer. The preparation method comprises the following steps: providing a monovalent cation precursor containing one or more of cesium, formamidine, methyl ammonium, rubidium and gallium; providing a lead source precursor containing a halogen element; providing a B-site cation doped precursor containing one or more of tin, copper, strontium, barium, zinc and calcium; a poor solvent containing fluorine ions is provided; respectively adding the monovalent cation precursor, the lead source precursor and the B-site cation doped precursor into a carrier solvent for dissolving and stirring treatment to obtain a perovskite precursor solution; and injecting the perovskite precursor solution into a poor solvent containing fluorine ions, carrying out a stirring reaction, and carrying out centrifugal purification to obtain the perovskite quantum dots. According to the method, the perovskite quantum dots and the multi-fluorine common passivation layer are synthesized through a one-step method, and the multi-fluorine common passivation layer not only can coat the perovskite quantum dots, but also can effectively passivate surface defects of the perovskite quantum dots.

The invention discloses a luminescent crystal material with functions of simultaneously detecting Fe < 3 + > and organic amine as well as a preparation method and application of the luminescent crystal material. According to the photochromic and AIE bifunctional organic ligand based on 4, 4 '-((9H-fluorene-9-subunit) methylene) bis (1-(4-carboxyl benzyl) pyridine-1-onium) chloride, the preparation method and the product of the photochromic and AIE luminous crystal material capable of detecting organic amine and Fe < 3 + > are provided, the synthesis route is simple and easy to control, the product yield can reach 38.4%, and the preparation method is suitable for industrial production and popularization. Compared with the prior art, the crystal material is simple, convenient and reliable in detection. Firstly, the quenching constant of luminescence enhanced detection of aqueous phase Fe < 3 + > can reach-1.46 * 10 < 4 > M <-1 >, the detection limit is as low as 4.18 * 10 <-6 > M, and the material is a photochromic luminescent crystal material for relatively sensitive detection of Fe < 3 + > at present. Secondly, the volatile organic amine can be visually detected. The HOF is light yellow, and the HOF shows gradually deepened yellow after di-n-propylamine, dimethylamine and trimethylamine are detected.

The invention discloses a camphor-based fluorescent probe for continuously detecting gallium ions and glyphosate as well as a preparation method and application of the camphor-based fluorescent probe. The fluorescent probe is 2, 3-bis ((2-hydroxy-5-((4, 7, 7-trimethyl-3-oxo-bicyclo [2.2. 1] heptyl-2-subunit) methyl) benzylidene) amino) maleic nitrile, and the structural formula of the fluorescent probe is shown in the description. According to the invention, 3-(3-formyl-4-hydroxybenzylidene) camphor is used as a raw material, and is subjected to a condensation reaction with 2, 3-diamino maleic nitrile, such that 2, 3-bis ((2-hydroxy-5-((4, 7, 7-trimethyl-3-oxo-bicyclo [2.2. 1] heptyl-2-subunit) methyl) benzylidene) amino) maleic nitrile is obtained, and the 2, 3-bis ((2-hydroxy-5-((4, 7, 7-trimethyl-3-oxo-bicyclo [2.2. 1] heptyl-2-subunit) methyl) benzylidene) amino) maleic nitrile is obtained. The compound can be specifically subjected to complexation reaction with gallium ions, the fluorescence color of a solution is changed from colorless to green under irradiation of ultraviolet light with the wavelength of 365 nm, and the fluorescence of the solution is changed from green to colorless after glyphosate and the gallium ions have a stronger coordination effect, so that the fluorescence of the solution is changed from green to colorless after the glyphosate is added into the solution. Therefore, the compound can be used as a fluorescent probe for continuously detecting gallium ions and glyphosate.

The application belongs to the technical field of solar cells, and discloses a perovskite solar cell, a preparation method and application thereof. The perovskite solar cell comprises, from bottom to top, a flexible conductive substrate, a hole transport layer, a perovskite active layer, a passivation layer, an electron transport layer and a metal electrode layer. The perovskite active layer comprises APbX3. A comprises at least one of formamidinium ion, methylamine ion, cesium ion and potassium ion. X comprises at least one of chloride ion, bromide ion and iodide ion. The passivation layer comprises 2-ethyl-2-phenyl malonic acid diethyl ester. The solar cell has excellent photoelectric conversion efficiency and long-term stability, and can be used to prepare photovoltaic modules and electronic devices. In addition, the preparation method is simple and easy to implement, does not require complex equipment and processes, can effectively control the thickness of each layer, is used to prepare large-area high-performance perovskite solar cells, and meets the needs of industrial production.

The application discloses an electrochemical aptamer sensor for simultaneously detecting Cd 2+ and Hg 2+ as well as a preparation method and application thereof. The electrochemical aptamer sensor comprises a multi-walled carbon nanotube and gold nanoparticle composite modified silk screen printing electrode, methylene blue-labeled MB-Apt is coupled to the electrode surface through gold-sulfur bond covalent action, and Cd 2+ detection is realized through MB electrochemical signal change; ssDNA and MB-Apt jointly capture Hg 2+ , silver nanoclusters are generated in-situ in the C-rich sequence of the ssDNA, and Hg 2+ detection is realized through electrochemical signal change of the silver nanoclusters; standard solutions with different concentrations are prepared by diluting Cd 2+ and Hg 2+ standard stock solutions, a standard curve of concentration and electrochemical signal is determined; after being pretreated, actual samples to be measured are added to the electrochemical biosensor, electrochemical signals are determined, and the concentration of the measured substance is calculated according to a linear model, so that specific, sensitive and rapid detection of the two heavy metal ions can be realized.

The application discloses a hydrogen peroxide etching solution for liquid crystal panels and a preparation method thereof, and belongs to the technical field of etching solutions, and aims to solve the technical problem that in the prior art, in order to improve the corrosion inhibition rate of the etching solution itself, a certain amount of metal corrosion inhibitor is added to deposit a film; however, the synthesized metal film layer hinders the etching efficiency of the etching solution. The hydrogen peroxide etching solution for liquid crystal panels comprises a hydrogen peroxide solution, a hydrochloric acid solution, a copper corrosion inhibitor and a chelating agent; the copper corrosion inhibitor is obtained by reaction of an intermediate II and allyloxy polyoxyethylene ether, the intermediate II is obtained by reaction of an intermediate product I and 3-amino methyl thiophene, and the intermediate product I is obtained by reaction of 5-chloro-2-methylbenzoic acid and propargylamine. The hydrogen peroxide etching solution for liquid crystal panels prepared by the application has high etching rate and still has excellent corrosion inhibition effect.

The application discloses a colorimetric and ratiometric fluorescent probe compound based on aggregation-induced emission and a preparation method and application thereof, and belongs to the technical field of analysis and detection. The colorimetric and ratiometric fluorescent probe compound is 5-((5-(4-(diphenylamino)phenyl)thiophene-2-yl)methylene)-2,2-dimethyl-1,3-dioxane-4,6-dione. The colorimetric and ratiometric fluorescent probe provided by the application uses an electron-rich double bond as a recognition group, can specifically undergo a nucleophilic addition reaction with sulfite and bisulfite ions, and can accurately and efficiently recognize the sulfite and bisulfite ions. The colorimetric and ratiometric fluorescent probe compound provided by the application is simple in synthesis, easy to prepare, and high in detection sensitivity. The product after response of the colorimetric and ratiometric fluorescent probe provided by the application has dual characteristics of aggregation-induced emission and intramolecular charge transfer, can emit strong fluorescence in a high-concentration aggregation state, and will not have an aggregation quenching phenomenon like traditional fluorescent probes.

The invention discloses a magnetic imprinted polymer for separating perrhenate ions as well as a preparation method and application of the magnetic imprinted polymer, and belongs to the field of hydrometallurgy. The method comprises the following steps: firstly, preparing Fe3O4 (at) mSiO2, and then carrying out sulfydryl modification on the Fe3O4 (at) mSiO2 by utilizing 3-mercaptopropyltrimethoxysilane (MPTMS), so as to obtain the Fe3O4 (at) mSiO2 (at) S-H microspheres. Then by taking perrhenic acid radical (ReO4) as template ions, N-vinyl imidazole (NVI) as a functional monomer, N 'N-methylene bisacrylamide (MBA) as a cross-linking agent, benzoin dimethyl ether (DMPA) as a photoinitiator and a mixed solution of water and ethanol as a pore-forming agent, carrying out hydrothermal reaction to obtain a porous polymer; the perrhenate ion magnetic imprinted polymer (ReO4--MIIPs) with high selectivity and high adsorption capacity is prepared by adopting a sulfydryl-alkene click polymerization method. And the rhenium is used as an adsorbent for enriching and recovering rhenium elements in a rhenium-containing secondary resource solution, so that the separation effect and the recovery efficiency of rhenium are remarkably improved. Compared with a traditional perrhenic acid radical ion imprinting material, the magnetic ion imprinting polymer prepared by combining an ion imprinting technology with a magnetic separation technology is good in stability, high in selectivity, large in adsorption capacity, high in adsorption rate, high in desorption rate and good in regeneration performance; reO4 <-> ions in a rhenium-containing secondary resource solution can be directionally separated, extracted and recycled, and a solution is provided for efficient recovery of secondary resource valuable metals.

The invention relates to a water-based phenolic aldehyde amine epoxy curing agent as well as a preparation method and application thereof, and belongs to the technical field of curing agents. The water-based phenolic aldehyde amine epoxy curing agent is prepared from methylene ammonium ions, a phenol reactant and a polyether amine epoxy adduct through an addition reaction, and comprises components with a specific structural general formula, the preparation method comprises the following steps: reacting polyamine with urotropine to prepare methylene ammonium ions, and gradually adding a phenol reactant and a polyether amine epoxy adduct; the polyether amine epoxy adduct is prepared by carrying out ring-opening addition reaction on polyether amine and epoxy resin. The curing agent provided by the invention can ensure that formaldehyde residues are avoided in the preparation process, the use safety of the phenolic aldehyde amine epoxy curing agent is greatly improved, meanwhile, the curing agent has proper flowability, reaction activity and water resistance, the corrosion resistance, mechanical property and chemical resistance can be regulated and improved, and the curing agent has very high application value.

This invention discloses a supported Au1Cu 24 Preparation of / g-C3N4 catalyst and its application in photocatalytic degradation. This catalyst utilizes Au1Cu 24 Copper alloy nanoclusters supported on a g-C3N4 support were constructed to address the problems of low efficiency, rapid electron-hole recombination, and poor stability in existing photocatalytic materials. The preparation steps are as follows: first, a g-C3N4 support is prepared, and then Au1Cu is synthesized. 24 Clusters, then Au1Cu 24 A composite catalyst was obtained by dispersing the catalyst in dichloromethane and mixing it with g-C3N4, followed by solvent evaporation. This design effectively suppressed photogenerated carrier recombination and significantly improved photocatalytic activity and stability by modulating the cluster electronic structure and charge distribution through heterometallic doping, combined with the anchoring of the active component by the g-C3N4 support and its role in promoting interfacial charge separation. When applied to the photocatalytic degradation of methylene blue under xenon lamp irradiation, it exhibited excellent degradation performance and cycle stability, with superoxide radicals (·O2) as the main active species. ‑ ) and holes (h + This invention provides a new technical solution for the efficient treatment of organic dye wastewater.

The invention belongs to the field of mineral processing, and discloses a flotation reagent for strengthening high-calcium-magnesium easily-argillized polyphosphorus ilmenite as well as a preparation method and application of the flotation reagent. The flotation reagent comprises a composite pH regulator and a multi-site combined collecting agent, the composite pH regulator is formed by mixing sulfuric acid and phosphoric acid, and the multi-site combined collecting agent is formed by pre-assembling lead ions and [(dodecyl imine) bis (methylene)] diphosphonic acid. According to the method, sulfuric acid and phosphoric acid are compounded to form an acidity-complexing synergistic system, so that dynamic precipitation of Ca < 2 + > and Mg < 2 + > and ore pulp interface reconstruction can be realized while the flotation pH is kept stable, and the ilmenite flotation effect is improved. According to the application of the flotation reagent in the high-calcium and high-magnesium easily-argillized polyphosphorus ilmenite, impurity mineral inclusion can be effectively reduced through mineral interface cleaning, interference ion removal, collecting agent directional adsorption and efficient hydrophobic construction, and unification of the high TiO2 grade and the high recovery rate is achieved.

The invention provides a method for preparing 2, 4, 6-trimethylbenzoyl-diphenyl phosphine oxide through electro-catalytic coupling, 2, 4, 6-trimethylbenzoyl-diphenyl phosphine oxide is prepared by taking 2, 4, 6-trimethylbenzaldehyde and diphenyl phosphine oxide as raw materials through electro-catalytic coupling, the method adopts a carbene catalyst to activate the 2, 4, 6-trimethylbenzoyl-diphenyl phosphine oxide in the oxidation process, and the 2, 4, 6-trimethylbenzoyl-diphenyl phosphine oxide is prepared through electro-catalytic coupling. According to the method, 2, 4, 6-trimethylbenzoyl-diphenyl phosphine oxide is obtained through an aldehyde group of 2, 4, 6-trimethylbenzaldehyde and an anodic oxidation and nucleophilic addition method under the electro-catalysis condition, use of chlorination reagents such as thionyl chloride and phosphorus trichloride is avoided, and the defects that in the prior art, an intermediate is prone to hydrolysis, and the three-waste problem exists are overcome.

This invention provides a Ni-doped Co3O4 nanosheet active material, its preparation method, and its application in a NO sensor. The preparation method includes the following steps: Step 1, dissolving cobalt salt and nickel salt in a mixed solvent and stirring until homogeneous to obtain solution A; Step 2, adding 2-methylimidazole to methanol and stirring until homogeneous to obtain solution B; Step 3, slowly adding solution B to solution A, first carrying out a first reaction at room temperature, then transferring to a reaction vessel for a second reaction, vacuum drying, and calcination to obtain the Ni-doped Co3O4 nanosheet active material. This application introduces 2-methylimidazole to regulate the spatial distribution of metal ions at the molecular scale, preparing a uniformly sized and loosely structured nanosheet active material with high specific surface area and surface active sites. In the construction of a fuel cell-type electrochemical NO sensor, it achieves rapid and highly sensitive detection of low concentrations of NO at room temperature, and significantly improves response speed, stability, and resistance to humidity interference.