55 results about "Methenium" patented technology

The invention relates to a preparation method and application of a magnetic cationic hydrogel-based composite adsorption material removing inorganic anionic pollutants in water. The magnetic cationic hydrogel-based composite adsorption material contains cationic hydrogel, magnetic substances and different forms of active metals. The preparation method of the magnetic cationic hydrogel-based composite adsorption material comprises the following steps: carrying out free radical copolymerizationontrimethyl ammonium chloride and methylene bisacrylamide, adding magnetic substances for reacting, and then carrying out in-situ loading on the different forms of the active metals, and the synthesized composite adsorption material has high surface positive charges and an exclusive adsorption site and can efficiently and quickly adsorb and remove F<->, PO4<3->, NO<3->, AsO4<3-> and SbO4<3-> in water. The prepared composite adsorption material has good chemical stability, wider pH value application range, strong resistance to ion interference, easiness in magnetic field separation and multiple regeneration times, low ion dissolving-out quantity and no secondary pollution and has good application potential.

The invention discloses a copper-cobalt-zinc composite self-supporting nano array electrode material and a preparation method and application thereof. The method comprises the following steps of oxidizing copper into copper hydroxide, washing and drying to obtain a linear array structure; soaking the linear array structure in a methanol solution containing metal ions, and enabling the metal ions to fully grow on the linear array structure; then placing in a methanol solution of 2-methylimidazole until a solid substance is changed from blue to purple, washing and drying to obtain a self-supporting structure @ZIF, wherein the metal ions are Co ions and Zn ions; and placing the self-supporting structure@ ZIF in an ethanol solution containing Co ions and Zn ions, and carrying out solvothermal reaction in a closed environment until the solid substance becomes gray from purple to obtain the electrode material. The electrode material has a highly ordered hollow nano array, a large number of defect holes exist in the surface of the nano array, more active sites and smooth electron transmission channels are provided for the catalytic process, and the electrode material can be used as a positive electrode and a negative electrode of a water electrolysis device.

The invention discloses a magnetic silica porous adsorbent and a preparation method and applications thereof. The preparation method comprises following steps: mixing silica powder and an iron ion solution; adding a hot alkali solution with a temperature of 60 to 80 DEG C to adjust the pH; after complete reactions, cooling the solution to the room temperature, carrying out aging, washing to the product until the product becomes neutral, drying, and grinding to obtain the magnetic silica porous adsorbent. According to the preparation method, an inorganic silicon source namely silica powder is taken as the raw material, silica powder is cheap, easily-available, nontoxic, and environmentally friendly, during the preparation process, no organic waste liquid is generated, the preparation methodis environmentally friendly, a surface deposition method is adopted, one-step synthesis is performed at a low temperature, the reaction time is short, the energy consumption is low during the preparation process, and the cost is low. The magnetic silica porous adsorbent has good selectivity, the maximal methylene blue adsorption quantity is 121.23 mg / g, and the maximal malachite green adsorptionquantity is 163.52 mg / g.

The invention discloses a preparation method and application of a g-C3N4 / (101)-(001)-TiO2 composite material. The preparation method is simple and easy to control, a synthesized g-C3N4 / (101)-(001)-TiO2 composite photocatalytic system takes carbon nitride as a main body, and TiO2 containing surface heterojunction as an object. The conduction capability of electrons between interfaces is improved, the separation of photo-induced electron hole pairs is promoted, and the catalytic capability under visible light is improved. The composite material not only makes up the defects of g-C3N4, but also accelerates the transfer of photo-induced electron hole pairs on the interface of g-C3N4 and (101)-(001)-TiO2, and can effectively catalyze and degrade paracetamol and methylene blue under visible light.

The invention discloses a method for measuring cerium ions based on nano gold simulated peroxidase. Utilizing the change of peroxidase activity simulated by the interaction between gold nanoparticles and cerium ions, gold nanoparticles catalyze hydrogen peroxide to oxidize 3,3',5,5'-tetramethylbenzidine hydrochloride for color development, thereby Shows changes in solution color and UV absorption spectral features. The linear range of absorbance value determination is 10~160 nmol / L, and the detection limit is 2.2 nmol / L. This method can be potentially applied to the determination of cerium ion content in environmental systems.

The invention provides a photoelectric functional material based on a silazine unit and its preparation method and application. The structural formula of the photoelectric functional material is shown in formula I or formula II: wherein R1 is phenyl, and R2 is methyl or phenyl. Its preparation method is to react carbazole with o-bromoiodobenzene or 1,4-dibromo-2,5-difluorobenzene, then react the bromine-containing intermediate with n-butyllithium, and then add diphenylchlorosilane or Methylphenylchlorosilane, and finally reacting silicon hydrogen derivatives with tert-butyl hydroperoxide to obtain photoelectric functional materials based on silazine units. The photoelectric functional material of the invention has high triplet state energy level, good hole transport performance and certain electron transport property, and the synthesis raw material is cheap. The organic electrophosphorescent device prepared by using the material of the invention has lower turn-on voltage, higher efficiency and stable luminous performance.

The invention discloses a preparation method of a sewage treatment catalyst. The preparation method comprises the steps of preparing carbon quantum dots supported by nanometer ferroferric oxide, preparing carbon quantum dots supported by epichlorohydrin modified nanometer ferroferric oxide, preparing carbon quantum dots supported by methylene blue modified nanometer ferroferric oxide, and carryingout ion exchange with ammonium sulfate, and the like. The invention also discloses the sewage treatment catalyst prepared by the preparation method of a sewage treatment catalyst. The sewage treatment catalyst disclosed by the invention is lower in price, more stable in effective performance, higher in photocatalytic efficiency, wider in visible-light response range and more remarkable in sewagetreatment effect.

The invention discloses a catalyst for preparing ethylenically unsaturated aldehyde from ethylenically unsaturated alcohol, its preparation method and application. The catalyst comprises 1-30wt% silver, 0.1-10wt% copper, 0.01-1wt% rhenium, 0.01-1wt% molybdenum, 30-50wt% TiO 2 , 20‑40wt% Ir 5 (PO 4 ) 6 (OH) 2 . The catalyst is particularly suitable for the oxidation of 3-methyl-2-butene-1-alcohol to prepare 3-methyl-2-butene-1-aldehyde. The catalyst of the invention has the characteristics of high reactivity, strong high-temperature sintering resistance, good stability, etc., and is suitable for large-scale industrial production.

The invention belongs to the technical field of extraction of metals and phosphonic acid extractants in recycled waste, and in particular relates to a method for extracting and recovering nickel from electroplating waste liquid by using bisphosphoric acid extractants. Common acidic organophosphorus (phosphine) extractants are poor in extracting nickel ions in electroplating waste solution, and the operation is cumbersome, and saponification is often required. The present invention adopts N,N-dodecylamine bis(methylene phenylphosphinic acid) (DADMPPA), N,N-hexadecylamine bis(methylene phenylphosphinic acid) (HADMPPA), N,N-deca Octamine bis(methylene phenylphosphinic acid) (OADMPPA) is used as the extractant to extract nickel ions in the electroplating waste solution. The technology has short extraction time, high efficiency, simple operation and little pollution, and can realize the recovery of nickel in the electroplating waste liquid.

The invention discloses a preparation method and an application method of a visible-light response type bismuth oxychloride photocatalyst, and belongs to the technical field of photocatalyst water treatment in the environmental chemical industry. The preparation method is characterized by comprising the following steps of: adding sodium bismuthate into absolute ethyl alcohol, and dispersing for 1 to 1.5h by magnetic stirring; preparing 100ml of 1.2mol.L<-1> hydrochloric acid, weighing potassium iodide of which the molar weight is equal to that of chloride ions in a prepared hydrochloric acid solution, and dissolving the potassium iodide into the hydrochloric acid solution to form a hydrochloric acid-potassium iodide mixed solution; dropwise adding the prepared hydrochloric acid-potassium iodide mixed solution into a sodium bismuthate-absolute ethyl alcohol dispersing system at the speed of adding 1mL of the mixed solution within 8 to 10 minutes by the magnetic stirring; stirring for 1.5 to 2h at the reaction temperature of 20 to 20.5 DEG C to prepare a suspended solution; filtering the suspended solution to obtain a filter cake; washing the filter cake for three times by using distilled water and the absolute ethyl alcohol; and drying the filter cake at the temperature of 40 to 50 DEG C to obtain the visible-light response type bismuth oxychloride photocatalyst. The visible-light response type bismuth oxychloride photocatalyst is used for adsorption and photocatalytic degradation of Rhodamine B or methylene blue dye wastewater, has good adsorption and photocatalytic degradation functions under visible light, is stable in catalytic activity and high in recycle rate, and has a practical application prospect.

The invention provides a binuclear magnesium metal catalyst as well as its preparation method and application. Catalyst preparation method: under inert gas protection and ice-water bath conditions, first react with N-pyrromethene tert-butylamine ligand with equivalent di-n-butyl magnesium, react the gained solution at room temperature for 2-3 hours, and then add One times the amount of o-methoxybenzaldehyde was added dropwise, and after the reaction was completed, the reaction solution was concentrated in vacuo, extracted with ether, and the extract was filtered and concentrated to separate out colorless transparent crystals. The catalyst has high selectivity and catalytic activity for the cross-coupling Tishchenko reaction, and the preparation method is simple, the raw materials are easily obtained, the reaction conditions are mild, and the catalyst has good industrial application prospects.

The invention discloses a preparation method of a Bi@NiFe‑LDH / NF composite material. The steps are: (1) cleaning foamed nickel to obtain a foamed nickel carrier; (2) washing Ni(NO 3 ) 2 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O, CO (NH 2 ) 2 and NH 4 F is made into salt solution A; (3) carry out microwave reaction with salt solution A, filter, and take filter residue; (4) wash and dry filter residue, obtain NiFe-LDH; (5) NiFe-LDH and acetylene black and polyvinylidene fluoride Ethylene is dispersed in nitrogen methylpyrrolidone to form a paste liquid, and coated on the surface of nickel foam carrier, after drying, the crude product NiFe‑LDH / NF is obtained; (6) take Bi(NO 3 ) 3 ·5H 2 O, EDTA‑2Na and KCl were used to make the electrolyte, and the crude NiFe‑LDH / NF was used as the working electrode for deposition to obtain Bi@NiFe‑LDH / NF. The prepared electrocatalyst has the advantages of large specific surface area and full contact with the reaction substrate, which is conducive to the rapid transport of protons and the timely escape of gases during the reaction.

The invention discloses a perovskite (CH3NH3PbClxI3-x) nanosheet array-based humidity sensor and a production method thereof. The production method comprises the following steps: carrying out a chemical solution reaction technology to form a buffer layer poly(3,4-ethylenedioxythiophene)-polystyrenesulfonate (PEDOT:PSS) on a glass substrate, drop-casting a lead acetate (PbAc2) film, placing the annealed PbAc2 film in a methylammonium chloride and methylammonium iodide (CH3NH3ClxI1-x) mixed isopropanol solution, and carrying out a reaction to prepare a perovskite nanosheet structure array; and annealing the produced nanosheet array, and carrying out vapor deposition of silver electrodes on two ends of the annealed nanosheet array through a hot evaporation technology in order to produce the perovskite humidity sensor. The production method has the advantages of low cost and simple process, and the perovskite nanosheet array-based humidity sensor has the advantages of high stability and sensitive response, and can be used to detect water vapor and other polar gases.

The invention discloses a polythiophene with nitroxide free radicals in the side chain and its preparation method and application. ‑2,2,6,6‑tetramethylpiperidine nitroxide free radical is the reaction raw material, 4‑dimethylaminopyridine is the catalyst, and dicyclohexylcarbodiimide is the dehydrating agent. The reaction is carried out in the methyl chloride solvent for 8-12 hours. After the reaction is completed, the reaction liquid is post-treated to obtain TT-TEMPO; in the sodium perchlorate boron trifluoride ether solution, the obtained TT-TEMPO is added to perform electropolymerization; the electropolymerization is completed Finally, wash the electrode surface to obtain the polymer PTT-TEMPO attached to the electrode surface. The PTT-TEMPO has catalytic activity similar to TEMPO. It is used in the electrocatalytic oxidation of alcohol to prepare aldehyde, and the results show that it has good catalytic oxidation performance.