8 results about "Porphyran" patented technology

The invention discloses a hydrophilic polyethersulfone ultrafiltration membrane based on metalloporphyrin coordination modification as well as a preparation method and application of the hydrophilic polyethersulfone ultrafiltration membrane. According to the ultrafiltration membrane, a membrane casting solution is prepared by blending a polyether sulfone base material, an organic solvent, a pore-foaming agent and tetra (4-aminophenyl) porphyrin, and the membrane casting solution is cured and formed in a coagulating bath containing ferric ions through a phase inversion process. The preparation method is characterized in that porphyrin compounds and iron ions are subjected to an in-situ coordination reaction in the phase inversion process to form a stable metalloporphyrin complex network structure, and the prepared ultrafiltration membrane has the following advantages that the hydrophilicity is increased, and the pure water flux is increased; the protein rejection rate is not less than 95%; the antibacterial property and the anti-pollution property are excellent. The process is simple and controllable, and the obtained membrane material has important application value in the field of biological medicine separation.

The application discloses a preparation method of all-weather bimetallic porphyrin CMP material, and specifically comprises the following steps: performing polycondensation reaction on M1-TCPP-COCl and 5,5'-diamino-2,2'-bipyridine in an organic solvent, performing suction filtration, washing and drying on a product to obtain M1Por-CMP; and performing coordination reaction on M1Por-CMP and metal M2 in acetonitrile, and performing suction filtration, washing and drying on a product, and the preparation method is completed. The M1Por-M2Bpy-CMP prepared by the application has rich pore structure and conjugate structure, can realize massive adsorption of pollutants through π-π interaction and physical adsorption. Meanwhile, the coordination bimetal in the CMP material can also increase the adsorption of pollutants through electrostatic interaction. The synergistic effect of the above various adsorptions can realize mass transfer strengthening before degradation.

The present invention relates to the technical field of halogenated organic matter treatment, and in particular to a kind of axial Co-O coordination modified metal porphyrin material and its preparation and application. The present invention provides a preparation method of axial Co-O coordination modified metal porphyrin material, comprising: mixing porphyrin cobalt powder with reduced iron powder to obtain a mixture, then ball milling under an inert atmosphere, the cobalt atom at the center of the porphyrin cobalt and the oxygen atom on the surface of the reduced iron powder form axial Co-O coordination, and obtain axial Co-O coordination modified metal porphyrin material. The present invention mixes porphyrin cobalt with reduced iron powder, and coordinates the cobalt atom at the center of the porphyrin cobalt with the oxygen atom under the action of mechanical force, thereby obtaining an axial Co-O coordination modified metal porphyrin material, which can be used to solve the treatment problem of high-concentration organic wastewater.

The invention relates to a preparation method of a FeTPP-ZIF-8 hydrogel slow-release photosensitizer, metalloporphyrin is limited in a ZIF porous material by adopting an in-situ packaging strategy, so that not only is the aggregation of photosensitive material FeTPP particles effectively avoided, but also the microenvironment of ZIF is utilized to enhance the luminescence function and provide additional binding sites for CO2 adsorption. The photosensitizer is further embedded by adopting a vacuum pressure injection technology, so that the size of the hydrogel can be effectively controlled, the situation that the mechanical property of the hydrogel is reduced because air enters the hydrogel is avoided, and meanwhile, the hydrogel material can realize rapid solid-liquid separation and is convenient to recycle and reuse. On the basis of the slow release effect of the hydrogel, active oxygen generated by illumination when the photosensitizer is in direct contact with cyanobacteria can be avoided, so that the increase of the biomass of the cyanobacteria is promoted, and the photosynthetic carbon sequestration efficiency of the cyanobacteria is effectively enhanced.

This invention provides a method for preparing a two-dimensional heterostructure catalytic material (Fe / Cu-TCPP / S-CN) composed of a self-assembled iron-copper bimetallic porphyrin hydrogen-bonded organic framework and carbon nitride, and its application in photocatalytic synergistic activation of persulfate (PMS) for the degradation of bisphenol A (BPA), belonging to the field of environmental pollution control technology. The material uses urea and melamine as precursors, and prepares a carbon nitride support with abundant nitrogen sites and a high specific surface area through mechanical mixing and high-temperature calcination. Furthermore, an iron-copper bimetallic porphyrin is stably anchored to the carbon nitride surface in the form of a hydrogen-bonded framework through a self-assembly strategy. Structural characterization shows that iron and copper atoms are highly dispersed atomically within the porphyrin ring, forming a unique two-site coordination structure. This configuration not only enhances the electronic coupling between the metal and the support, but also constructs a superlattice interface with significant quantum confinement effects through π–π stacking and van der Waals interactions, effectively promoting the spatial separation and directional migration of photogenerated carriers, providing an ideal electron transport channel for PMS activation. This study successfully developed a highly efficient oxidation system dominated by singlet oxygen through the rational design of a heterostructure of an iron-copper bimetallic porphyrin hydrogen-bonded organic framework and carbon nitride. This material exhibits excellent and stable pollutant degradation performance under a wide pH range (especially in alkaline environments), providing a new material platform and theoretical basis for developing advanced oxidation technologies suitable for complex real-world water bodies.

The application discloses a zirconium-based metal-organic framework material and a preparation method and application thereof. The preparation method of the zirconium-based metal-organic framework material comprises the following steps: 1) dispersing a zirconium salt, 5,10,15,20-tetrakis(4-carboxyphenyl) porphyrin and a regulator in an organic solvent to react, so as to obtain a two-dimensional zirconium-based metal-porphyrin framework; and 2) dispersing the two-dimensional zirconium-based metal-porphyrin framework and a transition metal salt in an organic solvent to react, so as to obtain the zirconium-based metal-organic framework material. The zirconium-based metal-organic framework material has the advantages of large specific surface area, strong adsorption capacity, rich active sites, high catalytic activity, and the like, and the loaded metal is not easy to flow out, and the structure is still complete and high catalytic activity after multiple cycles, and the preparation method is simple, and is suitable for being used for the oxidation reaction of a benzyl C-H bond.

The application relates to the technical field of electrocatalytic materials, and particularly discloses a catalytic material based on a bimetallic porphyrin covalent organic framework structure and a preparation method and application thereof. By introducing specific nickel / cobalt bimetallic porphyrin units into a covalent organic framework (COF), a high-performance water electrolysis oxygen evolution reaction (OER) catalytic material is successfully prepared. By virtue of the rigid conjugated structure and strong coordination capacity of the porphyrin ring, the nickel / cobalt bimetallic active sites are highly and uniformly dispersed in the framework, and by high-temperature calcination and carbonization, a porous graphite carbon skeleton with a high specific surface area is constructed while the metal-nitrogen active center is retained, so that the conductivity, structural stability and active site availability of the material are significantly enhanced. The composite material exhibits excellent OER catalytic performance and long-term electrochemical stability in an alkaline electrolyte, and exhibits good practical application potential in the field of water electrolysis oxygen evolution.

The invention relates to the field of geomembranes, in particular to a high-tensile anti-cracking geomembrane and a preparation method thereof, and aims to solve the problems that an existing geomembrane is poor in tensile anti-cracking performance and ultraviolet aging resistance, and wide application of the geomembrane in a severe environment is limited. According to the high-tensile anti-cracking geomembrane, the titanium dioxide loaded whiskers coated with the polydopamine are used as a reinforcing material, the tensile strength of the geomembrane is effectively improved through the ultrahigh mechanical property of the titanium dioxide loaded whiskers, the mechanical property of the geomembrane is remarkably enhanced, and cracks are effectively inhibited; by adding hindered amine thienyl metal porphyrin, light energy can be effectively absorbed and dispersed, free radicals generated in the aging process are passivated, aging continuation is inhibited, and degradation caused by aging is avoided, so that long-term stability and high performance of the geomembrane under severe environment conditions are maintained, and the service life of the geomembrane is prolonged.