41results about How to "Green and mild reaction conditions" patented technology

The invention discloses a bionic polymer and a method and application for making a durable double bionic polymer coating. The bionic polymer contains a zwitterionic group W, an amino hydrochloride S and a quaternary ammonium cationic group T in the side group. Dissolve the polymer and dopamine in a solvent in sequence to prepare a polymer-dopamine weakly alkaline aqueous solution. Then place different substrates in the polymer-dopamine weakly alkaline aqueous solution, rinse and dry to obtain a durable double biomimetic polymer coating. . The resulting coating has high light transmittance, good hydrophilicity, strong base material versatility, excellent coating stability, good anti-biomolecule adhesion and antibacterial properties, simple preparation process, one-step dip coating method is convenient, efficient, green and mild, and the material The surface has long-term resistance to biological contamination, resistance to bacterial infection and high biocompatibility. It is suitable for medical equipment, diagnostic and treatment instruments, implants, drug delivery systems of various shapes and materials, as well as contact lenses and corneas that require high light transmittance. Coating of surfaces such as shaping mirrors.

The invention discloses a polycarbazole-loaded nano-palladium material, a preparation method and application thereof. Specifically, the average particle size distribution of the palladium nanoparticles prepared in the present invention is about 4.2 nm, and they are uniformly dispersed on the substrate polycarbazole material. The material can catalyze the Suzuki reaction involving aryl bromide and aryl chloride under light and water phase conditions, and has the characteristics of high conversion efficiency, wide application range, and green and mild reaction conditions. After the conversion reaction, the substrate is separated from the reaction system, and the catalytic system can proceed to the next round of reaction, and it remains stable after 3 cycles, and its catalytic activity does not decrease significantly.

The invention belongs to the field of inorganic nanometer materials and relates to a preparation method of a ZnO-loaded CdIn2S4 nano-cube composite catalyst and the application of the catalyst to the field of environmental governance. CdIn2S4 nano-cubes are synthesized by using cadmium nitrate tetrahydrate, indium nitrate monohydrate and thioacetamide as raw materials, and a ZnO-loaded CdIn2S4 nano-cube compound is synthesized through deposition and a hydrothermal method. The composite material has the advantages of large specific surface area, wide spectral response range, strong light-harvesting ability, convenience in separation of photon-generated carriers and the like and has very excellent solar photocatalytic degradation ability. A synergistic effect can be used in the ZnO-loaded CdIn2S4 nano-cube composite material, effective transfer and separation of the photon-generated carrier are realized, the light absorption range of the compound is widened, and effective degradation of tetracycline hydrochloride and ofloxacin by the compound under solar light is realized.

The invention discloses a cobalt-iron bimetallic catalytic material based on MOF-74, a preparation method and application thereof. In the present invention, the metal salt and the organic ligand are added into the solvent in a molar ratio (1-5): 1, stirred uniformly and then transferred to a polytetrafluoroethylene reactor; wherein, the metal salt is composed of cobalt-containing metal salt and cobalt-containing Composed of iron metal salt, and the molar ratio of cobalt and iron in the metal salt is (1-9): (1-9); put the polytetrafluoroethylene reactor into an oven and react at 100-160 ° C for 12-72 hours, A cobalt-iron bimetallic catalytic material based on MOF‑74 was obtained. The cobalt-iron bimetallic catalytic material combined with persulfate can efficiently and deeply degrade various organic pollutants in water. The cobalt-iron bimetallic catalytic material-persulfate catalytic system based on MOF‑74 can be applied to deep purification of organic pollution sewage.

The invention relates to chemical synthesis methods and aims to provide a method for synthesizing N-substituted carbazole. The method comprises the following steps: adding halogenated N-substituted diphenylamine and a ligand into the same solvent for dissolving, dripping the obtained solution into potassium tert-butoxide, and stirring and reacting at the temperature of 30-160 DEG C for 6-12 hours; adding saturated sodium chloride to carry out a quenched reaction, extracting for three times by using ethyl acetate, and merging the organic phase; drying anhydrous sodium sulfate, filtering, performing reduced pressure distillation, removing the ethyl acetate, and performing thin-layer chromatography separation, thereby obtaining the N-substituted carbazole. According to the method disclosed by the invention, the defect in the prior art that transition metals are used is overcome, the reaction conditions are green and mild, and the method is suitable for industrial production.

The invention discloses the preparation and application of a polyacrylate dispersant and a superhydrophobic coating. The polyacrylate polymer dispersant whose side groups contain hydrocarbon groups and polyamine functional groups is dissolved in a solvent. Add hydrophobic particles and film-forming substances to it in turn to prepare a super-hydrophobic composite dispersion, and then apply it on the surface of different substrates by spraying, scraping, etc., and dry to obtain a transparent super-hydrophobic nano-composite coating. The superhydrophobic coating obtained from the superhydrophobic composite coating material obtained by the superhydrophobic coating has uniform appearance, good transparency, a good water contact angle on the coating surface, and a rolling angle of the coating surface is not more than 6°; the coating has good superhydrophobic properties The self-cleaning performance and the chemical medium resistance of the coating are significantly improved; and the base material is highly versatile, suitable for large-area construction, and can realize mass production.

The invention provides a copper and silver alloy nanosheet and a preparation method thereof. The preparation method includes the following steps that a copper source is added to solvent A, a protective agent is added, the mixture is stirred to be uniform and then heated to 50-160 DEG C, and a solution a is obtained; a silver source is added to solvent B, and a solution b is obtained through ultrasound; the solution b is added to the solution a, stirring is continued for 5 minutes to 5 hours, then cooling and centrifugation are conducted, sediment is taken and washed, then vacuum drying is conducted, and a copper and silver alloy material is obtained; the molar ratio of the copper source to the silver source to the protective agent is 1:( 0.1-10):(1-20). According to the copper and silver alloy nanosheet and the preparation method thereof, water or ethyl alcohol or polyhydric alcohol serve as the solvent, spherical copper particles serve as the copper source, the protective agent is cheap and easy to obtain, the reaction condition is environmentally friendly and mild, the dispensability of the generated alloy nanosheet is good, the single dispersion degree is high, a certain degree of oxidation resistance is achieved, and the copper and silver alloy nanosheet and the preparation method thereof can be applied to large-scale production.

The invention relates to a method for in situ synthesis of gold nanorods / graphene oxide composite material.The method comprises concrete steps: mixing graphene oxide modified by sodium polystyrenesulfonate, a secondary growth solution of growth gold nanorods and gold seeds; and standing the mixture at constant temperature for a period of time. The method for in situ synthesis of gold nanorods / graphene oxide composite material has following beneficial effects: the method has a green and moderate reaction condition and high repeatability and is easily applied; gold nanorods / graphene oxide composite material prepared by the method has high loading capability; gold nanorods are distributed uniformly; and the method has a broad prospect for integration of diagnosis and treatment by means of increase in efficiency of photothermal therapy and subsequent moderation of antibodies and drug loads.

The invention relates to a preparation method of silver-coated copper nanoparticles used in conductive inks, respectively dissolving copper precursors, protective agents and reducing agents in organic solvents, heating to obtain nano-copper solutions; adding nano-copper solutions to the Silver nitrate solution was added to the mixture, cooled, centrifuged and dried to prepare silver-coated copper nanoparticles for conductive ink. The invention adopts continuous reduction and replacement methods to prepare silver-coated copper nanoparticles for conductive ink; the preparation process does not need to add complex chelating agents, separation and purification, activation sensitization and other intermediate processes, and the reaction conditions are green and mild. In addition, the silver-coated copper nanoparticles produced by the preparation method have good dispersibility, high monodispersity, and strong anti-oxidation ability, and can be produced on a large scale and applied to the field of conductive ink.

The invention discloses a synthesis method of trans-alpha-benzoinoxime and belongs to the field of the organic chemical synthesis technology. The trans-alpha-benzoinoxime is represented by a structural formula (I). The synthesis method comprises catalyzing benzaldehyde through imidazole salt ion liquid, enabling the catalyzed benzaldehyde and benzoin to perform condensation reaction under the alkaline condition to generate alpha-benzoin, enabling alpha-benzoin crude products to be crystallized again, enabling the crystallized alpha-benzoin crude products to react with hydroxylamine hydrochloride or hydroxylamine sulphate to generate the trans-alpha-benzoinoxime, and separating the trans-alpha-benzoinoxime through column chromatography to obtain purified products. The synthesis method of the trans-alpha-benzoinoxime is simple, convenient, mild and environment-friendly in reaction condition, easy to implement, good in yield, low in cost, simple in product purification and capable of obtaining high-purity trans-alpha-benzoinoxime.

The invention relates to a synthesis method for a polybrominated benzene [1.3] oxazine derivative, comprising the following steps of: carrying out reaction of compounds shown in formula (I) and N-bromo-succinimide (NBS) in a solvent at 25-100 DEG C to obtain the polybrominated benzene [1.3] oxazine derivative shown in formula (II) after the reaction is completed. The compounds shown in the formula(I) and the formula (II) are as shown in the description, wherein R is chosen from phenyl, substituted phenyl, C1-C5 alkyl (preferably isopropyl) or thiophene. The synthesis method has the advantagesof being mild in reaction conditions, environment-friendly, simple in operation and capable to obtain polybrominated benzene oxazine compounds which cannot be obtained by conventional methods throughone pot multi-step reaction.

The invention belongs to preparation of nano composite materials, and the field of environmental governance, and discloses a preparation method of a carbon quantum dot CQDs hybridized CdIn2S4 composite material and a catalysis property of the carbon quantum dot CQDs hybridized CdIn2S4 composite material. The preparation method comprises the following steps: by taking carbon quantum dot CQDs and CdIn2S4 nanoparticles as raw materials, mixing the raw materials according to a certain ratio, and preparing a CdIn2S4 composite material nanoparticle composite photocatalyst which is hybridized with CQDs in different ratios by using a backflow method. The composite photocatalyst prepared by using the method can be used for degrading rhodamine B and an antibiotic levofloxacin in the presence of visible light. The material has the advantages that n the preparation method is simple, the cost is low, the energy consumption is small, the raw material is rich and clean, the reaction condition is gentle and the like; the carbon quantum dot CQDs hybridized CdIn2S4 composite photocatalyst is a good visible light response type composite photocatalyst, shows excellent photoproduction electron separation efficiency and excellent visible light catalysis activity, and has important application prospects in organic wastewater treatment.

The invention belongs to the field of preparation of inorganic nanocomposite materials and environmental treatment, and specifically discloses Ag with excellent visible light activity. 2 O quantum dot hybrid ZnIn 2 S 4 A preparation method of nanosheet p-n type composite photocatalyst. The method uses ZnIn 2 S 4 Using nanosheets and silver nitrate as raw materials, different proportions of Ag were prepared by in-situ method 2 O quantum dot hybrid ZnIn 2 S 4 Nanosheet p‑n type composite photocatalyst. Ag prepared by the present invention 2 O quantum dots / ZnIn 2 S 4 The nanosheet p-n type composite photocatalyst can be applied to efficiently degrade the antibiotic tetracycline hydrochloride under visible light. The invention has the advantages of environment-friendly preparation of raw materials, simple method, mild hybridization reaction conditions, short cycle and low cost. Ag 2 O quantum dot hybrid ZnIn 2 S 4 Nanosheet is a novel p-n type composite photocatalyst, the present invention is the first report to synthesize this composite photocatalyst, Ag 2 O quantum dot hybrid ZnIn 2 S 4 The nanosheets exhibit excellent photocatalytic degradation activity and have important application prospects in the treatment of antibiotics in wastewater.