85results about How to "Stable degradation" patented technology

A method for producing a colloid of metallic nanoparticles including the steps of: providing metal ions in solution; providing a stabilizing agent; and reducing said metal ions in the presence of said stabilizing agent, so that metallic nanoparticles are formed with a surrounding layer of said stabilizing agent, wherein the reduction step is carried out at a temperature of not less than 20° C. and not more than 150° C. The metallic nanoparticles are formed of a mixture of transition metal and noble metal, such as Ni—Pd. The resultant nanoparticles have a high stability in terms of size and chemical degradation and so can be stored for long periods. They are therefore particularly suited for forming patterned nanoparticle arrays on a substrate by nanocontact printing for the subsequent formation of a corresponding array of carbon nanotubes or nanofibers via plasma enhanced CVD.

A phosphite composition comprising at least two of a tris(diamylaryl) phosphite, a tris(monoamylaryl) phosphite, a bis(diamylaryl)monoamylaryl phosphite, and a bis(monoamylaryl)diamylaryl phosphite. The inventive phosphite composition is a liquid at ambient conditions.

The invention discloses a preparation method of a covalent organic framework/carbon nitride composite material and application thereof. Firstly, a covalent organic framework material is synthesized byusing p-phenylenediamine and triformyl phloroglucinol as synthetic monomers through a room-temperature solid-phase method, then the covalent organic framework material and carbon nitride are mixed, stirred and dried in methyl alcohol, and pyrolysis is carried out under the protection of inert gas to obtain a target product. The covalent organic framework/carbon nitride composite material disclosed by the invention is large in specific surface area, high in nitrogen doping amount and rich in pore structure and can effectively remove toxic organic pollutants in water by constructing a novel Fenton-like system, and new application of the covalent organic framework material in the field of catalysis is expanded; unavoidable metal ion leaching in the activating process of a metal nano catalystis overcome; and the preparation method has the advantages of simple process, easiness for repeated operation, controllable structure, suitability for large-scale production and the like.

A phosphite composition comprising at least two of a tris(dibutylaryl) phosphite, a tris(monobutylaryl) phosphite, a bis(dibutylaryl)monobutylaryl phosphite, and a bis(monobutylaryl)dibutylaryl phosphite. The inventive phosphite composition is a liquid at ambient conditions.

The invention discloses a preparation method of a titanium dioxide nanoparticles/graphene composite photocatalytic material. With tetra-n-butyl titanate, graphite powder, concentrated sulfuric acid, concentrated nitric acid and DMF as main raw materials, and a titanium dioxide nanoparticles/graphene composite photocatalytic material is prepared by a method of slow hydrolysis prior to hydrothermal synthesis. The photocatalytic performance of the prepared material is tested by simulated sunlight, and the bio-refractory organic pollutant rhodamine B is degraded to prove the excellent photocatalytic performance of the material. As an inorganic photocatalytic material, the composite material has relatively high photocatalytic activity and is of a perfect application prospect in environmental protection. The method has the advantages that the particle size of titanium dioxide is controllable, the graphene sheets are of good dispersity, and the titanium dioxide only grows on the graphene surface and is uniformly dispersed on the graphene sheets.

The invention discloses a tower-type self-circulation aerobic degradation reactor. Waste water is uniformly introduced into an anoxic reaction zone at the bottom of the reactor by virtue of a water inlet pipe and a water distribution system which are arranged at the bottom of the reactor, the waste water is jointly mixed and reacts with high-concentration sludge and digestive fluid which are arranged at the bottom of the reactor and mixed liquor refluxed through a central reflux pipe, the mixture rises for forming a vertically rising type flow state upward movement, and a water inlet pump and an aeration fan are used for providing power, so that no sludge, digestive fluid reflux pump and the like is needed; meanwhile, the aeration fan has low power requirement, a conventional air blower is needed only, and operating cost and management difficulty are greatly reduced.

The invention provides a composite porous bone tissue engineering scaffold. The composite porous bone tissue engineering scaffold comprises a porous PLGA scaffold and zwitterionic hydrogel compoundedwith the porous PLGA scaffold. The invention also provides a method for preparing the composite porous bone tissue engineering scaffold. The method comprises preparing a zwitterionic hydrogel performed liquid containing a zwitterionic monomer, an initiator and a crosslinking agent, immersing the porous PLGA scaffold subjected to plasma surface modification in the performed liquid, taking out the porous PLGA scaffold and carrying out UV crosslinking and freeze drying. Through compounding of the zwitterions and the porous PLGA scaffold, the sharp degradation of the common biodegradable tissue engineering scaffold is avoided, stable degradation of the whole scaffold is realized and the biocompatibility and biosafety of the scaffold material are greatly improved. Through compounding of the zwitterionic hydrogel and the PLGA scaffold, the whole scaffold has a growth factor efficient sustained-release function.

The invention discloses a phosphorus-silicon-nitrogen-containing metal ion complex flame retardant, and a preparation method and an application thereof. The phosphorus-silicon-nitrogen-containing metal ion complex flame retardant (M(PDC)1-3) is synthesized through successfully preparing a ligand containing DOPO, POSS and catechol by a one-step process and coordinating the ligand with metal ions. The metal ion complex flame retardant has a high thermal stability, a good compatibility with epoxy resin and a strong catalysis effect, and can accelerate the generation of a large amount of residualcarbon during burning of materials to generate a dense carbon layer playing a role in thermal insulation and oxygen isolation, so the flame retardation property of a matrix is improved. The phosphorus-silicon-nitrogen-containing metal ion complex (M(PDC)1-3) can reduce the curing temperature during curing of the epoxy resin and a curing agent, so the phosphorus-silicon-nitrogen-containing metal ion complex also can be used as a promoter during curing when used as a flame retardant. The phosphorus-silicon-nitrogen-containing metal ion complex (M(PDC)1-3) greatly improves the mechanical properties of the epoxy resin when introduced into the epoxy resin.

The invention provides an integrated water treatment system for treating both water for seawater recirculating aquaculture and tail water. The integrated water treatment system comprises a sewage collection tank, a physical filtering device, an air floating pool, an electrode-suspended filler coupled biofilter treating unit, and an ozone-ultraviolet combined pathogenic microorganism killing unit which are connected in sequence, wherein the sewage collection tank, the physical filtering device, the air floating pool, the electrode-suspended filler coupled biofilter treating unit, the ozone-ultraviolet combined pathogenic microorganism killing pool are all connected with a sludge concentration-dehydration device, and the ozone-ultraviolet combined pathogenic microorganism killing pool is also connected with a culture pond. The integrated water treatment system of the invention has the characteristics of high water treatment efficiency and continuous maintenance of the high water quality of an aquaculture system, and the water circulation utilization rate of the system can reach 95% to 98%; and the integrated water treatment system can fully meet the demand for healthy culturing of cultured objects, has a tail water treatment function, and allows the tail water to be discharged after reaching the standard.

The present invention relates generally to a relatively stable magnetic photocatalyst comprising an insulated magnetite core coated with a layer of photoactive titanium dioxide. In one example, the insulation layer is silicon dioxide which blocks direct electrical contact between the titanium dioxide and the magnetite.

The invention provides a marine aquaculture tail water treatment system, comprising a sewage collection pool, a physical filtering device, an air floatation tank and an electrode-suspended filler coupled biological filter treatment unit, wherein the sewage collection pool, the physical filtering device, the air floatation tank and the electrode-suspended filler coupled biological filter treatment unit are separately connected with a sludge concentration and dehydration device; suspended filler in the electrode-suspended filler coupled biological filter treatment unit is arranged in a biological filter; a direct current (DC) anodic-cathodic array combination is arranged at the upper part of the biological filter; an electric stirring device is arranged at the lower part of the biological filter; a sludge bucket is arranged at the bottom of the biological filter; the electric stirring device is arranged above the sludge bucket; a carbon source replenishment device is connected with the biological filter by means of a pipeline. The marine aquaculture tail water treatment system has the advantages of being high in nitrogen and phosphorus removal treatment efficiency, small in land occupation area, energy-saving, low in cost, free from secondary pollution, simple and convenient to manage, and the like.

The invention discloses Rhodococcus DSH capable of degrading environmental hormone bisphenol A, and applications thereof, wherein the Rhodococcus DSH belongs to Rhodococcus sp, is named as Rhodococcus DSH, has the preservation number of CGMCC NO. 12392, and is preserved in the China General Microbiological Culture Collection Center, wherein the address is Institute of Microbiology, Chinese Academy of Sciences, 3# Court No.1, Beichen West Road, Chaoyang District, Beijing, and the sequence of the 16S rDNA fragment of the Rhodococcus DSH is represented by SEQ ID NO:1 in the sequence table. According to the present invention, the active sludge of the bisphenol A production drug factory is subjected to enrichment acclimation, purification separation and re-screening to obtain the Rhodococcus DSH, wherein the Rhodococcus DSH can stably and efficiently degrade bisphenol A, and can be used for the bisphenol A biodegradation in the environment, and the environmental remediation.

The invention relates to the technical field of marine antifouling coatings, in particular to a preparation method and application of biodegradable antifouling resin. The preparation method comprises the steps that raw materials including lactic acid, polyhydric alcohols and/or polyester polyol, a catalyst and a solvent A are adopted to synthesize a biodegradable polylactic acid block polymer P1; raw materials including the P1, triethylamine, methylacryloyl and a solvent B are adopted to synthesize polylactic acid block polymer based acrylic ester, raw materials including the P2, a metacrylic acid ester monomer, an initiator and a solvent C are adopted to synthesize a biodegradable acrylate polymer P3. The prepared biodegradable antifouling resin can be applied to the preparation of degradable antifouling coatings, the prepared antifouling coatings have excellent resistance to immersing in seawater and controllable degradability, then release of an antifouling agent is controlled, and a long-term antifouling effect is achieved.

The invention relates to 'a method for recycling water sediment' and belongs to the technical field of water remediation. The method is characterized by comprising: mixing sediment and a culture medium in a weight ratio of 10:(1-3), crushing to obtain a raw material, and inoculating organic matter degrading bacteria tolerant to high temperature to carry out high-temperature fermentation in aerobic environment to obtain humus; the culture medium includes plant straws, seed shells, and/or fruit shells. The humus has high conversion rate and high decomposition degree, can greatly promote the growth and reproduction of plants, may act as agricultural compost, cultivation media and the like and may be recycled in water as cultivation media for aquatics.

The invention discloses antifouling mildew-proof diatom ooze coating and a preparation method thereof. The antifouling mildew-proof diatom ooze coating is mainly prepared from, by weight, 42-50 partsof deionized water, 22-26 parts of diatomite, 16-20 parts of emulsion, 0.5-1 part of ammonium hydroxide, 8-10 parts of filler, 8-10 parts of nano sepiolite powder, 1.5-1.7 parts of ethylene glycol, 0.7-0.8 part of sodium hydroxide, 3-5 parts of a composite material, 2-3 parts of modified nano zinc oxide, 0.5-1 part of a composite mildew-proof agent, 0.3-0.5 part of a dispersing agent, 0.2-0.4 partof an antifoaming agent and 0.2-0.4 part of a leveling thickening agent. By deionized water serving as a solvent, emulsion serving as a film forming matter of the coating, diatomite and nano sepiolite powder serving as functional filler in a scientific ratio and the composite material, functions of purification of harmful substances such as VOC (volatile organic compounds), formaldehyde, moistureand the like, breathable humidity regulation, noise reduction, thermal preservation, heat insulation, fire prevention, flame retardation and the like of coatings are guaranteed.

The invention relates to the field of photocatalysis, in particular to a two-dimensional ZnO/BiOBr0.9I0.1 hybrid photocatalyst and a preparation method thereof. The photocatalyst is formed by carrying out two-phase hybridization and prepared from the following chemical components: ZnO/BiOBr0.9I0.1, wherein 0.9 and 0.1 respectively indicate stoichiometric mole fractions of halogens Br and I, and the mass percentage of ZnO is 10-50%. The preparation method of photocatalyst comprises the following characteristic steps: (1) preparing a two-dimensional ultra-thin Zn5(CO3)2(OH)6 sheet layer; and (2) preparing the two-dimensional ultra-thin ZnO/BiOBr0.9I0.1 hybrid photocatalyst. According to the two-dimensional ultra-thin ZnO/BiOBr0.9I0.1 hybrid photocatalyst provided by the invention, organic dyes can be degraded, and toxic organic phenol with a relatively stable structure also can be degraded. The preparation method is easy and environment-friendly, and has a potential application value in a solar photocatalytic decomposition treatment technology of organic pollutants.

The invention provides pharmaceutical compositions for preventing and treating endotoxin-related diseases and conditions, as well as methods for making and using such compositions.