56 results about "Methenium" patented technology

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 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 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.