57 results about "Methenium" patented technology

The invention discloses a sulfur ion measurement method based on gold nanoparticles as simulated peroxidase. The gold nanoparticles act with sulfur ions to simulate the change of activity of peroxidase, and 3,3',5,5'-tetramethylbenzidine hydrochloride is oxidized by hydrogen peroxide in the presence of the gold nanoparticles as catalyst, and the color is developed to indicate the change of solution color and the change of ultraviolet absorption spectral characteristics. The detection limit of visual observation is 2 Mumol / L. The linear range of absorbance detection is 0.5-10 Mumol / L, and the detection limit is 0.08 Mumol / L. After the simple pretreatment of a water sample, the content of sulfur ions in the water sample is measured according to the method disclosed by the invention.

The invention relates to a preparation method of a cobalt-doped rhenium disulfide nanosheet array for electro-catalytic hydrogen evolution. The preparation method comprises the following steps: addingan aqueous 2-methylimidazole solution into an aqueous solution of cobalt nitrate hexahydrate, and immersing a piece of acid-treated carbon cloth into the formed mixed solution; after a reaction for aperiod of time, taking a sample, and cleaning the sample with deionized water; carrying out growing in the same solution for a period of time so as to obtain a ZIF-67 nanoarray sample which is namedas ZIF-67 / CC; cleaning and drying the sample; dissolving the cobalt nitrate hexahydrate into a mixed solution of ultrapure water and ethanol, and putting the prepared ZIF-67 / CC into the mixed solutionfor hydrolysis to obtain the product cobalt hydroxide nanoarray Co(OH)2 / CC; and preparing the product Co-ReS2 / CC. The Co-ReS2 / CC prepared by using the preparation method disclosed by the invention isapplied to an HER electrocatalyst.

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 method for carrying out extraction separation on zirconium and hafnium by virtue of a novel bisphosphate extraction agent N,N-n-octylamine di(methylene phenylhypophosphoric acid), and having an extraction rate which far exceeds the extraction rate of a common acidic organophosphorus extraction system, and mainly solves the problems of low extraction rate for zirconium andhafnium, and poor separation effect. N,N-n-octylamine di(methylene phenylhypophosphoric acid) has a great extraction effect on zirconium and hafnium under different acidities, and zirconium is preferentially extracted. Zirconium ions and hafnium ions are recovered through reverse extraction, the reverse extraction rate is up to 99% and above, and an organic phase can be repeatedly utilized. The technology is high in extraction rate, good in separation effect, less in pollution, low in cost, and capable of being used for the industrial production of separation for zirconium and hafnium.

The invention discloses a visible-light response iron-based photocatalyst which comprises components such as transition metal, rare earth, bismuth and iron. The molecular formula of a final product isBi(1-x-y)TxPyFeO3, wherein T refers to transition metal, P refers to rare earth elements, 0<x<=0.07, and 0<y<=0.07. By a low-temperature pyrolysis coordination precursor method, transition metal andrare earth element doped composite bismuth ferrite is rapidly prepared, and the method includes the steps of coordination precursor preparation and coordination precursor pyrolysis. Firstly, a bismuthferrite co-doped precursor is prepared, and metal and rare earth ions enter bismuth ferrite lattices. Secondly, a coordination precursor is pyrolyzed to form nano-scale composite bismuth ferrite oxide Bi(1-x-y)TxPyFeO3. The catalyst has strong paramagnetism, the color removal rate of methylene blue water solution is larger than 95% in visible light, and magnetization recovery rate reaches 90% after a sample is used.

The invention provides a copper metal coordination compound and a preparation method thereof, and applications in catalytic photodegradation of methylene blue and methyl orange organic dyes, wherein the chemical formula of the coordination compound is [Cu(BMIOPE)(Br-BDC)]n, BMIOPE is equal to 4,4'-bis(2-methyl-1-imidazolyl)diphenyl ether, Br-H2BDC is equal to 5-bromoisophthalic acid, and the copper metal coordination compound is of a two-dimensional network structure formed by self-assembly of copper ions through BMIOPE and a Br-H2BDC ligand. Experimental results show that the copper coordination compound has good properties of catalyzing light degradation and removing organic dyes in water, has potential application value in the field of environmental pollution treatment, and is simple insynthesis process, mild in reaction condition and convenient to use, and a new means is provided for treatment of harmful substances in the environment, and meanwhile a new thought is provided for application of a porous material in environmental engineering.

The invention discloses a preparation method and application of a fluorescent probe based on benzothiazole Schiff base, belonging to the technical field of fluorescent probes for metal ion detection. The molecular formula of the fluorescent probe is C34H31N5O2S2. The preparation method comprises the following steps: (1) subjecting 2-hydroxy-5-methylbenzaldehyde with 2-aminothiophenol to reacting to obtain a compound a; (2) carrying out the Darff reaction on the compound a and hexamethylenetetramine to generate a compound b; and (3) carrying out a condensation reaction on the compound b and diethylenetriamine to obtain a probe molecule L. The probe molecule reacts with zinc ions in a solution containing both absolute ethyl alcohol and Tris-HCl in a ratio of 3: 2, and the concentration of the zinc ions can be detected by utilizing the change of fluorescence intensity. The probe disclosed by the invention is simple and convenient to synthesize, mild in reaction conditions and high in selectivity and sensitivity to zinc ions, the response range of the probe is 0-8.00 [mu]M, and the detection limit of the probe is 60.4 nM. In addition, through a laser confocal scanning microtechnique, the novel fluorescent probe is successfully applied to detection of zinc ions in cells.

The invention provides a preparation method of a cadmium metal complex and applications of the cadmium metal complex as a fluorescent probe and a photodegradation catalyst. The chemical formula of thecomplex is [Cd4(L)3(DMF)Cl2.H2O]n, wherein H2L is 1,1'-(4-carboxylphenyl)-2,2'-biimidazole. The cadmium metal complex is of a three-dimensional structure formed by self-assembling cadmium ions with an L<2-> ligand. The cadmium complex has an obvious fluorescence quenching effect on ferric ions, dichromate ions, antibiotics furacilin and nitrofurantoin, can be used as the fluorescent probe, and has potential application values in the fields of environmental monitoring and life science. In addition, the cadmium complex has stable and efficient catalytic photodegradation dye properties, makes methylene blue basically completely degraded within 100 minutes under the condition of visible light, is easy to separate and can be recycled for multiple times.

The invention belongs to the technical field of water pollutant purification treatment. The invention relates to a photocatalytic oxidation treatment process for dimethyl sulfoxide-containing wastewater, in particular to a photocatalytic oxidation treatment process for dimethyl sulfoxide-containing wastewater through a photosensitizer under visible light. A photosensitizer and hydrogen peroxide are used for treating a water body containing dimethyl sulfoxide under irradiation of visible light, wherein the photosensitizer comprises rose bengal, rhodamine, methylene blue, nuclear solid red and spiro[fluorene-9,9'-xanthene], and the mass ratio of the photosensitizer to dimethyl sulfoxide in the water body is (0.5-1):100. These photosensitizers generate initiation free radicals after absorbingvisible light, and the generated initiation free radicals can be exchanged with hydrogen peroxide, so that the hydrogen peroxide is decomposed into oxidation free radicals to react with dimethyl sulfoxide.

The invention discloses a preparation method of blue light perovskite quantum dots, which comprises the following steps: adding lead bromide, tetraoctyl ammonium bromide and didodecyl dimethyl ammonium chloride into methylbenzene to prepare a lead source precursor; preparing a monovalent anion precursor containing one or more of cesium, methylamine or formamidine; and injecting the monovalent anion precursor into the lead source precursor for reaction to obtain the blue-light perovskite quantum dots. The didodecyl dimethyl ammonium chloride is directly introduced into a quantum dot synthesis stage, the dynamic process of crystal growth is changed, and the blue light perovskite quantum dot which is simple and convenient in preparation method, good in stability, relatively good in luminescence property and suitable for an electroluminescent diode is obtained.

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 relates to a method for quantitating liquid-state <31>P nuclear magnetic resonance (phosphorus-31 NMR) in an environment sample by taking methylenediphosphonic acid (MDP) as external standard. Before testing, a glass capillary tube in which an MDP aqueous solution is encapsulated and a nuclear magnetic tube filled with a monopotassium phosphate solution with determined concentration form a coaxial sleeve pipe system, and the correction coefficient of the sleeve pipe system is calculated; during testing, an alkaline extracting agent is used for dissolving a sample, then sustained oscillation and centrifugation are carried out to obtain leaching liquid, and the leaching liquid is frozen and dried; obtained powder is dissolved into a heavy solution, and the dissolved solution together with the glass capillary tube is transferred into the nuclear magnetic tube, and the concentrations of all phosphorus fractions are calculated according to the peak area ratio of MDP on the <31>P NMR spectrogram and a phosphorus compound to be detected. The capillary tube containing the MDP solution is used as the liquid-state 31P NMR external standard for determining the phosphorus concentration of the environment sample, interference of co-existing ions can be avoided, no overlapping with the chemical shifting of the characteristic peak is caused, the step of measuring total phosphorus in the heavy solution by a plasma spectrometer method or a chemical method is omitted, and the method is suitable for measuring and analyzing phosphorus fractions in multiple environment samples.

A process of dissolving [6,6]-phenyl-C60-butyric-N-2-dimethylaminoethyl ester in a solvent to produce a first mixture. A reagent is added to the first mixture to produce a second mixture. The second mixture is then refluxed to produce [6,6]-phenyl-C60-butyric-N-2-trimethylammonium ethyl ester iodide.

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 belongs to the technical field of extraction of metal and phosphonic acid extracting agents in recycled waste, and particularly relates to a method for extracting and recycling nickel from electroplating waste liquid by utilizing a diphosphoric acid extracting agent. Common acidic organophosphorus (phosphine) extracting agents are poor in effect of extracting nickel ions in electroplating waste liquid, and the extracting process is tedious in operation, and often needs saponification. According to the method, N, N-dodecylamine bis (methylenephosphinic acid) (DADMPPA), N, N-hexadecylamine bis (methylenephosphinic acid) (HADMPPA) and N, N-octadecylamine bis (methylenephosphinic acid) (OADMPPA) are adopted as extracting agents to extract nickel ions in the electroplating waste liquid. The method is short in extraction time, high in efficiency, easy to operate, small in pollution, and capable of achieving recovering of nickel in the electroplating waste liquid.

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 provides a non-radioactive method and device for measuring the purification efficiency of an iodine adsorber, and the method comprises the steps: S1, a sucking pump is started to exhaust air, so that the air volume, temperature and humidity meet the detection requirements; S2, a tracer injection unit injects a non-radioactive isotope mixture gas of methyl iodide and air as a tracer; S3, a measuring probe emits laser with specific energy to break molecular bonds of corresponding energy of the non-radioactive methyl iodide gas molecules, positive and negative ions are separated out, and the concentration value of methyl iodide ions in the tracer agent is obtained by measuring current generated by ions in a potential field; and S4, the purification efficiency of the iodine adsorber is judged according to the concentration accumulated value of the methyl iodide ions in the upstream and downstream tracers. The radioactive risk in the process of non-radioactive measurement of the purification efficiency of the iodine adsorber is eliminated, and the engineering application requirement of efficiency measurement of the iodine adsorber is met.

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.

An improved wood fire retardant is prepared from the following raw materials in parts by weight: 7-10 parts of tetrakis hydroxymetyl phosphonium sulfuric, 3-8 parts of phosphoric acid, 7-11 parts of solid sodium bicarbonate, 6-9 parts of calcium hydroxide, 5-7 parts of ammonia water, 8-12 parts of methenamine, 7-10 parts of ammonium sulfate, 3-6 parts of boric acid, 7-9 parts of urea, 6-10 parts of copper sulfate, 3-10 parts of zinc chloride and 6-11 parts of bentonite. The improved wood fire retardant has the benefits that good inflaming retarding and combustion suppressing effect is achieved, and at the same time decay resistance and vermin-proof performance are achieved and the action time is long.

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, which includes the preparation of nanometer iron tetroxide-loaded carbon quantum dots, the preparation of epichlorohydrin-modified nanometer iron tetroxide-loaded carbon quantum dots, and the preparation of methylene blue-modified nanometer iron oxide-loaded carbon quantum dots. Preparation of ferroferric oxide loaded carbon quantum dots, ion exchange with amine persulfate and other steps. The invention also discloses a sewage treatment catalyst prepared according to the preparation method of the sewage treatment catalyst. The sewage treatment catalyst disclosed in the invention is cheaper, has more stable effective performance, higher photocatalytic efficiency, wider visible light response range, and more significant sewage treatment 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 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 discloses a preparation method of a multi-mode rhenium disulfide diagnosis and treatment agent, which comprises the following steps: respectively putting liquid bromine, rhenium and sulfur into a quartz tube, and heating to obtain blocky single crystal ReS2; the preparation method comprises the following steps: grinding blocky single crystal ReS2 into powder, and mixing the powder with a nitric acid solution to form a mixed solution; the mixed solution is stirred and then centrifuged, a sample is cleaned, and a ReS2 micron layer with magnetism is obtained; dispersing the obtained ReS2 micron layer into a mixed solution of N-methyl pyrrolidone and ethanol, centrifuging and cleaning to obtain a ReS2 nano layer; the obtained ReS2 nano layer and an mPEG-NH2 solution are mixed, stirred and dried, and the mPEG-NH2 modified ReS2 nano layer is obtained. The diagnosis and treatment agent obtained by the invention not only improves the definition and sensitivity of human soft tissue imaging, but also has good photo-thermal and magnetothermal characteristics, also improves the biocompatibility with human tissues, prolongs the in-vivo half-life period, and reduces the immunogenicity.

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 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.