54 results about "Cobalt phthalocyanine" patented technology

The invention discloses a self-driven bio-electro-Fenton sewage treatment method based on granular sludge electroactivity domestication. The sewage treatment method comprises the following steps: firstly, inoculating anaerobic granular sludge into an anode chamber of a microbial fuel cell, fixing a clustered carbon fiber electrode in a biological anode chamber as an electrode collector, taking a cathode as an oxygen reduction cathode, and performing electrochemical enrichment to obtain electroactive granular sludge; then, preparing an iron-cobalt diatomic catalyst from the nitrogen-doped graphene oxide, cobalt phthalocyanine and iron phthalocyanine; and finally, adding the iron-cobalt diatomic catalyst into the electroactive granular sludge to form a hybrid structure, controlling dissolved oxygen in a reaction system, and degrading organic pollutants by adopting an SBR (sequencing batch reactor). The biological electro-Fenton technology has a better effect of removing refractory organic pollutants, and compared with a traditional electro-Fenton method, the self-Fenton technology can achieve the activity of molecular oxygen without external electric energy input.

The invention discloses a COF electrostatic spinning wound dressing with near-infrared response and antioxidant activity and a preparation method of the COF electrostatic spinning wound dressing, and belongs to the field of application materials and technologies. The COFs are synthesized from cobalt hexafluorophthalocyanine (CoPcF16) and ellagic acid (EA). The COFs is prepared into the spinning membrane, and the COFs spinning membrane has very strong oxidation resistance, can effectively remove excessive endogenous ROS, can respond to near infrared to generate exogenous ROS, and can effectively kill bacteria at a wound and improve blood flow and healing of the wound. The COFs spinning membrane prepared by the invention is simple and convenient in preparation method, good in biocompatibility, strong in oxidation resistance and capable of responding to near infrared to produce ROS, and has strong application potential in the field of treatment of a series of infected wounds, especially treatment of diabetic foot ulcers.

The invention provides a preparation method of a sodium sulfide carbon confinement pre-sodium coating based on monatomic catalysis, and belongs to the technical field of sodium battery materials. Comprising the following steps: mixing cobalt phthalocyanine and melamine powder, performing ultrasonic-assisted mechanical stirring, drying and grinding to obtain composite powder; mixing with sodium sulfate and polyvinylpyrrolidone in proportion, stirring, drying and grinding to obtain precursor powder; the precursor powder is sintered in an argon atmosphere, so that sodium sulfate is converted into sodium sulfide in situ, cobalt atoms in cobalt phthalocyanine are dispersed in a carbon network in a monatomic state, and a monatomic cobalt catalysis-carbon confinement sodium sulfide composite material is prepared; mixing the composite material with a conductive agent, a first binder and a first organic solvent, and performing stirring and defoaming stirring to prepare slurry; and coating the surface of a positive electrode material with the slurry to form a sodium supplementing interface layer, and performing vacuum drying to obtain the positive electrode with the sodium pre-coating. The problems of initial cycle sodium loss and long-term cycle performance reduction of the sodium-ion battery, defects of traditional sodium salt supplementation and the like are solved.

The invention relates to the technical field of photo-anodes, in particular to a preparation method of a BVO / CoPc + BN composite photo-anode and application of the BVO / CoPc + BN composite photo-anode in photoelectrochemical decomposition of water. A preparation method of the BVO / CoPc + BN composite photo-anode comprises the following steps: mixing boron nitride BN and cobalt phthalocyanine CoPc, then adding acetonitrile, carrying out ultrasonic treatment, stirring and centrifuging, pouring out supernate, putting a product obtained by centrifuging into a crucible, and calcining and grinding to obtain a CoPc + BN composite material; and adding N, N-dimethylformamide into the CoPc + BN composite material, carrying out ultrasonic treatment, adding deionized water, continuously carrying out ultrasonic treatment until no precipitate is generated, then adding BVO, carrying out a hydrothermal reaction, and after the reaction is finished, washing and drying to obtain the BVO / CoPc + BN composite photo-anode. The BVO / CoPc + BN composite light anode shows excellent light current density, and the light current density reaches 5.04 mA. Cm <-2 >.

The invention discloses a preparation method and application of a beta-functionalized cobalt phthalocyanine axial connection carbon nanotube electrocatalyst, and relates to a preparation method and application of an electrocatalyst. The invention aims to solve the problem of low selectivity of glycolaldehyde synthesis in the prior art, the CoPcX-CNT electrocatalyst is prepared by adopting a method of combining organic synthesis and diazo treatment, and CoPcCN-CNT containing cyano-functionalized cobalt phthalocyanine has optimal H2O2 selectivity. The Faraday efficiency of 95.7% and the H2O2 yield of 20320 mmol.g <-1 >. H <-1 > can be achieved in a flowing electrolytic tank under the industrial current density of 300 mA. Cm <-2 >. And finally, adjusting the permeability of H2O2 by using an ion exchange membrane, and finding that the AEM system with proper permeability of H2O2 has the highest glycolaldehyde selectivity (63.5%). The method is applied to the field of H2O2 in-situ production and efficient utilization.

The invention relates to the field of polymer functional membrane materials, and particularly provides a composite sulfonated polyarylene ether nitrile sulfone proton exchange membrane and a preparation method thereof. Sulfonated poly (arylene ether nitrile sulfone) is synthesized through nucleophilic substitution reaction, and the sulfonated poly (arylene ether nitrile sulfone) and sulfonated cobalt phthalocyanine are subjected to blending and casting to form a membrane, so that the provided composite sulfonated poly (arylene ether nitrile sulfone) proton exchange resin contains a sulfonic acid structural unit, a sulfone structural unit, a polar cyano group and a phthalocyanine structural unit; the problem that an existing proton exchange membrane is low in sulfonation degree and proton conductivity can be solved, and the proton exchange membrane has the advantages of being high in structural stability, good in mechanical property, excellent in thermal stability and high in safety. The introduction of sulfonated cobalt phthalocyanine can effectively improve the internal structure of the sulfonated polyarylene ether nitrile sulfone proton exchange membrane, promote the conduction rate of water molecules in the membrane, and further improve the proton conductivity of the sulfonated polyarylene ether nitrile sulfone proton exchange membrane. In addition, the manufacturing process is green and simple, the compounding cost is low, and the application prospect is very wide.

The invention belongs to the technical field of desulfurization catalysts, and particularly relates to a PDS-ionic liquid composite desulfurization catalyst and a preparation method thereof. The PDS-ionic liquid composite desulfurization catalyst is prepared from the following raw materials: binuclear cobalt phthalocyanine ammonium sulfonate (PDS for short), deionized water, ionic liquid, DMF (Dimethyl Formamide) and absolute ethyl alcohol. By regulating and controlling the proportion of the ionic liquid to the water, the preparation of the liquid-state homogeneous-phase composite catalyst is realized, and the effective combination of the catalyst and the ionic liquid is promoted. In the aspect of catalytic conversion of inorganic sulfur, the ionic liquid is organically combined with a PDS desulfurization catalyst, so that the absorption capacity of the composite catalyst to H2S is enhanced. Sulfur capacity data shows that the sulfur capacity of the PDS-IL composite catalyst is about 4 times of that of a single PDS catalyst. In the aspect of organic sulfur catalytic conversion, the organic sulfur removal efficiency of the PDS-IL composite catalyst is remarkably improved, and compared with the removal rate of about 50% of a single PDS catalyst, the removal rate of the PDS-IL composite catalyst can reach 70%-80%.

This invention discloses a method for preparing a supported low-carbon hydrocarbon deodorization catalyst. The method includes: (1) preparing a catalyst containing M... 2+ and M' 3+ (1) Add molecular sieve to the solution and stir evenly; (2) React the obtained suspension with a mixed solution of NaOH and Na2CO3 or a weak alkaline solution under stirring; (3) Obtain the composite carrier by drying and calcination; (4) Prepare a cobalt salt solution and transfer Co to the cobalt salt solution by ion exchange. 2+ (5) After filtration and drying, Co molecular sieve solid alkali is obtained; (6) Co molecular sieve solid alkali, ammonium phthalate sulfonate, urea, ammonium molybdate, and phthalic anhydride are added in proportion and ground evenly; (7) The obtained material is heated under an inert atmosphere to react and obtain the catalyst product. In the catalyst prepared by this invention, sulfonated cobalt phthalocyanine is combined with molecular sieve through chemical bonds, the active component has a stronger binding force and a longer service life.

The present invention relates to the field of photoanode technology, and specifically to a preparation method of a BVO / CoPc+BN composite photoanode and its application in photoelectrochemical water decomposition. The preparation method of the BVO / CoPc+BN composite photoanode is as follows: after mixing boron nitride BN and cobalt phthalocyanine CoPc, acetonitrile is added, ultrasonicated, stirred, centrifuged, the supernatant is discarded, the product obtained by centrifugation is placed in a crucible, calcined, and ground to obtain a CoPc+BN composite material; N,N-dimethylformamide is added to the CoPc+BN composite material, ultrasonicated, deionized water is added, and ultrasonication is continued until no precipitate is generated, and then BVO is added to carry out a hydrothermal reaction. After the reaction is completed, washing is carried out, and drying is carried out to obtain a BVO / CoPc+BN composite photoanode. The BVO / CoPc+BN composite photoanode exhibits an excellent photocurrent density of 5.04 mA·cm ‑2 .

The present invention relates to the field of environmental protection and water pollution control, and discloses a preparation method of zirconium-cobalt bimetallic phthalocyanine and its application in degrading glyphosate in water bodies. Specifically, zirconium-cobalt bimetallic phthalocyanine catalyst is prepared by a solvothermal method using zirconium salt and cobalt phthalocyanine as raw materials and organic acid as a regulator. Its catalytic performance is regulated by optimizing the dosage of the regulator. The prepared catalyst can activate peroxymonosulfate, and the degradation rate of glyphosate in water bodies reaches 80% - 100%. The present invention discloses the preparation of a zirconium-cobalt bimetallic phthalocyanine catalyst and its application in the degradation of glyphosate in water bodies, which has broad application prospects in the field of water environmental protection.

The invention belongs to the technical field of wave-absorbing materials, and particularly relates to a Fe-MOF derived carbon-coated Copc composite material and a preparation method and application thereof. Comprising the following steps: mixing a ferric salt solution and a 2-aminoterephthalic acid solution, and carrying out solvothermal reaction to obtain NH2-MIL-101 (Fe); the preparation method comprises the following steps: by taking NH2-MIL-101 (Fe) as a carrier, adding cobalt phthalocyanine turbid liquid, and carrying out in-situ impregnation loading, so as to obtain the Fe-MOF derived carbon (at) Copc composite material. The Fe-MOF derived carbon-coated Copc composite material is obtained by uniformly dispersing cobalt phthalocyanine on MOF through a simple in-situ impregnation loading mode and a strong pi-pi stacking effect, has good wave absorption performance, enhances interface polarization loss, optimizes impedance matching and adapts to various loss coordination mechanisms, and has good application prospects. The heat resistance and the wave-absorbing property of the material are effectively improved.

The invention relates to a method for improving the catalytic performance of cobalt phthalocyanine in electrocatalysis of carbon dioxide reduction through a molecular co-adsorption strategy, in particular to an efficient electrocatalysis carbon dioxide reduction system formed by co-adsorbing functional molecules melamine and cobalt phthalocyanine on the surface of a multi-walled carbon nanotube through pi-pi interaction, and belongs to the technical field of catalytic energy. According to the invention, cobalt phthalocyanine (CoPc) and melamine (MLA) are used, and CoPc and MLA are co-adsorbed on the surface of a multi-walled carbon nanotube (MWCNT) through a method of co-adsorption in a solution, so that the MWCNT-coated CoPc-MLA catalyst is formed. In the reaction of electrocatalytically reducing carbon dioxide into carbon monoxide, the adsorption of MLA molecules can regulate and control the electronic structure of the Co center, so that the Faraday efficiency of CO is improved. And the Faraday efficiency and the current density are remarkably improved under different overpotentials. The smooth implementation of the patent provides a universal, simple, convenient and efficient strategy for regulating and improving the Faraday efficiency (FE) of reducing carbon dioxide into carbon monoxide through electro-catalysis, solves the problem of unstable structure of the conventional system, and provides greater possibility for industrialization in the field of electro-catalysis carbon dioxide reduction.

The invention discloses a preparation method of a cobalt phthalocyanine PANI doped composite coating on the surface of a metal bipolar plate. The method comprises the following steps: carrying out surface roughening and acid activation pretreatment on the metal bipolar plate; the preparation method comprises the following steps: preparing precursor slurry from cobalt phthalocyanine and an aniline monomer in an acid environment through in-situ oxidative polymerization; the preparation method comprises the following key steps: introducing an independently designed and synthesized sulfonyl-bis-imidazoline-containing electron bridging aromatic ring as a multifunctional dopant, and effectively bridging a polyaniline chain and cobalt phthalocyanine molecules through the strong electron withdrawing effect of sulfonyl and the coordination synergistic effect of a bis-imidazoline ring to construct a stable three-dimensional conductive network; and finally, coating an activated substrate with the obtained composite slurry, and carrying out heat treatment to form a compact coating. The contact resistance of the composite coating is lower than 8.5 m omega.cm, the corrosion current density is lower than 0.1 mu A / cm, the binding force of the coating reaches the 5B grade, and the composite coating has high conductivity, high corrosion resistance and excellent interface stability.

The invention relates to the field of environmental protection and water pollution control, and discloses a preparation method of zirconium-cobalt bimetal phthalocyanine and application of zirconium-cobalt bimetal phthalocyanine to degradation of glyphosate in a water body. The invention specifically discloses a zirconium-cobalt bimetallic phthalocyanine catalyst prepared by taking zirconium salt and cobalt phthalocyanine as raw materials and organic acid as a regulator and adopting a solvothermal method. The catalytic performance of the catalyst is regulated and controlled by optimizing the dosage of the regulator. The prepared catalyst can activate peroxymonosulfate, and the degradation rate of glyphosate in a water body reaches 80%-100%. The invention discloses preparation of a zirconium-cobalt bimetallic phthalocyanine catalyst and application of the zirconium-cobalt bimetallic phthalocyanine catalyst in degradation of glyphosate in a water body. The zirconium-cobalt bimetallic phthalocyanine catalyst has a wide application prospect in the field of water environment protection.

The invention discloses a method for synthesizing a monatomic cobalt catalyst through ligand-assisted supramolecular strategy pyrolysis, the obtained catalyst and application, and belongs to the technical field of water pollution control. The method provided by the invention comprises the following steps: mixing cobalt phthalocyanine and trimesic acid in water to obtain a cobalt phthalocyanine-trimesic acid complex solution; the preparation method comprises the following steps: adding an aqueous solution of dicyandiamide, uniformly stirring, adding an aqueous solution of N-allylthiourea, stirring to react, washing and drying an obtained solid product, carrying out high-temperature pyrolysis, and carrying out acid leaching, washing and drying on a pyrolysis product to obtain the monatomic cobalt catalyst. According to the method, the monatomic cobalt catalyst with high cobalt loading capacity can be obtained, meanwhile, the sulfonamide antibiotics in sewage can be efficiently degraded, the removal rate of the sulfonamide antibiotics can reach 90% or above within 2 min, the removal rate of the antibiotics can reach 98% or above within 5 min, and very high catalytic efficiency can still be kept after multiple times of cyclic utilization.

The invention develops an axial weak coordination synthesis method for regulating and controlling a cobalt phthalocyanine molecular metal d band center based on a graphdiyne topological structure. The method is characterized in that a series of graphdiyne two-dimensional interfaces with different topological structures are obtained by regulating and controlling the arrangement and proportion of sp-and sp-hybridized carbon atoms, and the adsorption configuration of cobalt phthalocyanine molecules along the graphdiyne topological structure two-dimensional interfaces is regulated by utilizing the d-pi action between sp-carbon and a cobalt metal center. The weak coordination regulation effect of sp-carbon on the d band center of cobalt phthalocyanine metal is realized. In the process of preparing hydroxylamine from nitrate through electro-catalysis, the adsorption energy of hydroxylamine at the Co-N4 site is reduced through the axial weak coordination effect of sp-carbon; sp-carbon can be used as a transfer station for catalyzing nitrate to nitrite to assist the nitrite to be reduced into hydroxylamine at the cobalt phthalocyanine Co-N4 site, so that a full-chain series catalytic mechanism is formed.

The present invention discloses a novel composite heterojunction photocatalyst, a preparation method thereof, and its application in carbon dioxide reduction. The photocatalyst is prepared by a hydrothermal method using WCl6 as the tungsten source, thioacetamide (TAA) as the sulfur source, cobalt phthalocyanine as the CoPc source, phosphoric acid (H3PO4) as the phosphoric acid source, and deionized water (H2O) as the solvent. The prepared (CoPc-P / WS2) photocatalyst has a spherical structure with a diameter of about 500 nm, and the surface contains rich functional groups, and it exhibits excellent photocatalytic CO2 reduction activity under visible light.

The invention discloses a method for synthesizing a single-atom cobalt catalyst by pyrolysis of a ligand-assisted supramolecular strategy and the resulting catalyst and application, and belongs to the field of water pollution control technology. The method provided by the present invention comprises the following steps: cobalt phthalocyanine and trimesic acid are mixed in water to obtain a cobalt phthalocyanine trimesic acid complex solution; then a dicyandiamide aqueous solution is added, and after stirring, an N-allylthiourea aqueous solution is added, and after the stirring reaction, the solid product obtained is washed and dried, and then pyrolysis is performed at high temperature, and the pyrolysis product is acid-leached and washed, and a single-atom cobalt catalyst is obtained after drying. The method of the present invention can obtain a single-atom cobalt catalyst with a high cobalt loading, and at the same time, it can achieve efficient degradation of sulfonamide antibiotics in sewage, and the removal rate of sulfonamide antibiotics can be made to reach more than 90% within 2 minutes, and the antibiotic removal rate within 5 minutes reaches more than 98%, and after multiple recycling, very high catalytic efficiency can still be maintained.

The invention discloses a current collector coating resistant to sulfide corrosion and application thereof, and relates to the field of materials for batteries, preparation raw materials of the current collector coating resistant to sulfide corrosion comprise an adhesive and a conductive dispersion liquid, and a preparation method of the adhesive comprises the following steps: S1, adding polyacrylonitrile into a strong alkali solution with the mass concentration of 1-2%, and stirring uniformly; raising the temperature to 75 to 85 DEG C and hydrolyzing for 20 to 60 minutes to obtain a faint yellow suspension; s2, cooling the faint yellow suspension to room temperature, performing centrifugal separation, taking liquid, boiling and concentrating until the solid content is 20-30% to obtain hydrolyzed polyacrylonitrile; and S3, mixing the hydrolyzed polyacrylonitrile with the sulfonated cobalt phthalocyanine, adjusting the pH value to 3-5, then adding polyvinyl alcohol, continuously stirring, and then standing for defoaming to obtain the adhesive. Through the combined action of the hydrolyzed polyacrylonitrile, the polyvinyl alcohol and the sulfonated cobalt phthalocyanine, the cycle performance of the sulfide solid-state battery can be effectively improved.

The application discloses a phthalocyanine cobalt / pyridine nitrogen skeleton substituted phthalocyanine copper / asphalt coke active carbon composite catalytic material and a preparation method and application thereof, and the method comprises the following steps: 1, pyridine-2,3-dicarboxylic acid, urea, ammonium molybdate, copper chloride dihydrate and asphalt coke active carbon are mixed to obtain a mixture A; 2, the mixture A is kept at 100-180 DEG C, and then kept at 200-350 DEG C to obtain a product B; 3, the product B is ground, soaked, washed and dried in sequence to obtain pyridine nitrogen skeleton substituted phthalocyanine copper / asphalt coke active carbon; 4, phthalic anhydride, urea, ammonium molybdate, cobalt chloride hexahydrate and pyridine nitrogen skeleton substituted phthalocyanine copper / asphalt coke active carbon are mixed to obtain a mixture C; 5, the mixture C is kept at 100-180 DEG C, and then kept at 200-350 DEG C to obtain a product D; 6, the product D is ground, soaked, washed and dried in sequence to obtain the phthalocyanine cobalt / pyridine nitrogen skeleton substituted phthalocyanine copper / asphalt coke active carbon composite catalytic material, the purity of the material is high, and the discharge time and voltage of a Li / SOCl2 battery are improved.

The invention discloses a diepoxy functional group vinyl ether reactive diluent as well as application and a preparation method thereof. The preparation method comprises the following steps: reacting diethylene glycol / ethylene glycol / 1, 4-butanediol with acetylene to generate a divinyl ether intermediate, and carrying out two-stage reaction of hydrogen peroxide epoxidation and peracetic acid synergistic epoxidation. HO is activated under the assistance of electrochemistry to generate * OOH free radicals, and a cobalt phthalocyanine molecular catalyst is combined, so that the high-efficiency epoxidation conversion rate of vinyl ether is realized. Through a rectifying tower multi-stage separation process and a catalyst recycling technology, the product purity is greater than 99%, and the process waste liquid recovery rate is greater than 90%. The technology is particularly suitable for a large-molecular-weight epoxy resin system, and has remarkable application value in the fields of heavy anti-corrosion coatings, electronic encapsulating materials and the like.

The present invention belongs to the technical field of photoelectrocatalytic carbon dioxide reduction and discloses a preparation method of a Z-type heterojunction composite catalyst, comprising the following steps: dispersing potassium hexatantalate in an anhydrous ethanol solution of cobalt phthalocyanine, stirring, ultrasonicating, and evaporating the anhydrous ethanol; calcining the obtained solid product at 300°C for 2h to obtain K8Ta6O 19 / CoPc composite catalyst. The present invention uses a polyacid K8Ta6O rich in oxygen vacancies 19 By introducing cobalt phthalocyanine, the two semiconductors form a Z-type heterojunction, which can effectively reduce the electron-hole recombination rate, increase the carrier mobility rate, and also contain more oxygen vacancies and a larger electrochemically active surface area, which can provide more active sites and produce strong interactions with CO2 molecules, thereby greatly improving the photoelectrocatalytic carbon dioxide reduction performance of the catalyst.

To provide a catalyst, a membrane electrode assembly, an electrolytic cell, an electrolytic device, and a method for producing the catalyst, for synthesizing hydrocarbons by electrolysis of carbon dioxide.SOLUTION: A catalyst used for electrolysis of carbon dioxide comprises: a carrier; a nitrogen-containing heteroaromatic ring compound containing poly(4-vinylpyridine) or a specific compound, which is supported on the carrier; cobalt ions coordinated with nitrogen atoms on the heteroaromatic ring of the nitrogen-containing heteroaromatic ring compound; and at least one compound supported on the carrier selected from the group consisting of iron phthalocyanine, iron tetraphenylporphyrin chloride, and cobalt phthalocyanine.SELECTED DRAWING: Figure 2

The invention provides a method for modifying a porous carbon material for a positive electrode of a sodium-sulfur battery based on sulfonated cobalt phthalocyanine. The method specifically comprises the following steps: S1, adding waste coffee grounds and KOH into a mixed solution of water and ethanol according to a mass ratio; s2, adding a sulfonated cobalt phthalocyanine material into the mixed solution; s3, solid-liquid separation is achieved through a centrifugal method, and a coffee residue material loaded with sulfonated cobalt phthalocyanine is obtained; s4, putting the coffee residue material loaded with sulfonated cobalt phthalocyanine into a tubular furnace, and performing carbonization heat treatment in an inert atmosphere; s5, pickling, washing and drying the material obtained by heat treatment to obtain a sulfonated cobalt phthalocyanine modified coffee residue derived carbon material; and S6, mixing the obtained carbon material with sulfur, and carrying out sulfur loading at a high temperature to finally obtain the sulfonated cobalt phthalocyanine modified room-temperature sodium-sulfur battery positive electrode material. According to the modification method, the graphitization degree of the carbon material is improved, and the conductivity is improved; and a large number of catalytic sites are introduced, so that the conversion of polysulfide is accelerated, and the dissolution of soluble polysulfide is reduced. The carbon material is used as a sulfur carrier for a room-temperature sodium-sulfur battery positive electrode material, and has excellent rate capability and cycling stability.

The application provides a CoN4 catalyst modified battery separator and application thereof, and belongs to the field of lithium-sulfur batteries.In the application, a lithium-sulfur battery is assembled by using a separator modified by a catalyst CoN4 and an electrolyte containing phthalocyanine cobalt, and the obtained lithium-sulfur battery has stronger catalytic performance, electrochemical performance and cycle stability.Catalytic experiments show that the reduction peak shows a higher peak potential and a higher current response, and the oxidation peak shows a lower peak potential and a higher current response;when the rate is 19 C, the specific capacity is still 483 mAh g ‑1 ; after 3000 cycles at 2 C, the specific capacity can still reach 443 mAh g ‑1 , and the average cycle attenuation rate is 0.019 %.

The application belongs to the technical field of photocatalytic H2O2 production, and particularly relates to a kind of cobalt-nitrogen-sulfur co-doped porous carbon nitride nanosheet and its application in photocatalytic production of hydrogen peroxide. Cobalt sulfonated phthalocyanine and melamine are mixed uniformly in water, and then subjected to hydrothermal reaction. After the reaction is completed, the mixture is cooled, centrifuged and dried to obtain a light blue powder. The light blue powder is calcined in a tube furnace under a nitrogen atmosphere to obtain a dark green powder Co-N-S / CN. The method has low energy consumption, strong controllability, simple process, and simultaneously realizes element doping and defect modification. The prepared cobalt-nitrogen-sulfur co-doped porous carbon nitride nanosheet with nitrogen vacancies has high photogenerated carrier separation efficiency and two-step single-electron oxygen reduction selectivity, and exhibits good photocatalytic H2O2 production capacity under simulated sunlight. The H2O2 production rate of the cobalt-nitrogen-sulfur co-doped porous carbon nitride nanosheet with the optimal doping amount is increased by 9 times in the presence of a proton donor, 5-hydroxymethylfurfural.

The application provides a method for efficiently synthesizing formaldehyde by electrocatalysis of carbon monoxide, and the core is: first, a phthalocyanine cobalt molecular material is used as an electrocatalyst for selectively preparing formaldehyde, the material has a clear C1 selective formaldehyde generation path, and can essentially inhibit the undesired C-C coupling of intermediates; second, the reaction is carried out under high carbon monoxide pressure to enhance the competitive adsorption effect of carbon monoxide. The application proposes a carbon monoxide competitive adsorption strategy, which combines the intrinsic substituent regulation of phthalocyanine cobalt molecular materials and external carbon monoxide pressurization to inhibit the over-reduction of formaldehyde, detach the formaldehyde intermediate from the active site, and realize the selective electro-synthesis. The CoPc-OMe MDE optimized by the application realizes 98% CO-to-HCHO selectivity under 90 bar carbon monoxide, the peak Faraday efficiency is 72%, and the formaldehyde partial current density is more than 110 mA·cm ‑2 .

The application provides a preparation method of a high-spin-state cobalt monatomic catalyst and application of the high-spin-state cobalt monatomic catalyst in neutral electro-synthesis of hydrogen peroxide, and belongs to the technical field of electro-catalytic synthesis. A conductive carbon material dispersion liquid is mixed with a binuclear sulfonated cobalt phthalocyanine dispersion liquid, an adsorption reaction is carried out under magnetic stirring, and the obtained mixed liquid is subjected to suction filtration, washing and drying to obtain the high-spin-state cobalt monatomic catalyst, which has the advantages of simple steps and high repeatability. In the application, the binuclear sulfonated cobalt phthalocyanine is loaded on the conductive carbon material to realize construction of a high-spin-state cobalt center, so as to promote activation of O2 and improve reaction kinetics, and the application has excellent catalytic activity, hydrogen peroxide selectivity and stability in the neutral electro-synthesis of hydrogen peroxide. The application can also be used for synthesizing pure hydrogen peroxide solution with a concentration reaching the medical-grade disinfectant water standard, and the voltage of a reaction cell is lower than 2.2 V, so the application has great application potential of low energy consumption and direct synthesis.

The application discloses an amorphous polytetrafluoroethylene modified molecular catalyst and a preparation method and application thereof, belongs to the technical field of electrocatalysis, and is characterized in that carbon nanotubes and polytetrafluoroethylene are uniformly mixed and high-temperature annealing is performed to obtain a catalyst carrier, the catalyst carrier is mixed with cobalt phthalocyanine in N,N-dimethylformamide, centrifugation, washing and drying are performed to obtain a cobalt phthalocyanine catalyst; the polytetrafluoroethylene hydrophobic immobilized cobalt phthalocyanine can be applied to electrocatalysis of carbon dioxide into carbon monoxide. The application mainly controls the processing temperature, regulates the crystallinity of polytetrafluoroethylene, constructs a micro-hydrophobic environment for cobalt phthalocyanine, and improves the carbon dioxide concentration at a reaction interface, and the prepared catalyst exhibits excellent performance of catalyzing carbon dioxide into carbon monoxide under a large current density.

The present invention proposes a high-efficiency catalytic oxidation desulfurizer, a preparation method and application thereof, which loads the desulfurization active component cobalt phthalocyanine onto the surface of a molecular sieve with a rich specific surface area to achieve the desulfurization of sulfur-containing waste gas. The preparation method includes three steps: activation of the hydroxyl groups on the surface of the molecular sieve, modification of the molecular sieve with a silane coupling agent, and loading the molecular sieve with cobalt phthalocyanine, and finally obtaining a high-efficiency catalytic oxidation desulfurizer loaded with cobalt phthalocyanine. The present invention modifies the molecular sieve so that the cobalt phthalocyanine is linked to the surface of the molecular sieve in the form of a chemical bond, and adopts an ultrasonic impregnation method to disperse the desulfurization active component cobalt phthalocyanine as much as possible on the surface of the adsorption desulfurizer. The desulfurizer involved in the present invention can efficiently remove sulfides such as organic sulfur and H2S from sulfur-containing waste gas, and is applied to the selective catalytic oxidation desulfurization process of sulfur-containing gas, and can reduce the total sulfur content in the sulfur-containing waste gas to 1.0 mg / Nm 3 The desulfurizer has a relatively high air velocity (0.1s ‑1 ) and penetration sulfur capacity (200-300mg / g desulfurizer), and has a long service life, good repeatability, and can be recycled.