46 results about "Trioctylphosphine oxide" patented technology

The invention belongs to the method for compounding cadmium selenide and quanta of cadmium telluride, which is: use cadmium oxide containing 2~18 carbon atom as cadmium source, selenium powder as selenium source and tellurium powder as tellurium source, and the mol ratio of cadmiumsource and selenium source or tellurium source is 5:1-1:5, dissolve the selenium and tellurium powder with tricapryl phosphine, make oleic acid, and tricapryl phosphine oxide as enveloping agent and the mol ratio of cadmium source and enveloping agent is 1:2-1:6, use benzene, toluene, cyclohexane, normal hexane and normal heptane as solvent, under the condition that the density of cadmium source is 0.001-0.015M, the temperature in autoclave is 140-180deg.C, heat them for 0.8-16 hours and obtain cadmium selenide and quanta of cadmium telluride with different sizes by changing the reaction time. The cadmium selenide and quanta of cadmium telluride has narrower size distribution which is shown as narrower shooting of fluorescence whose half-peak width of quanta of cadmium selenide is 22-33nm and that of quanta of cadmium telluride is 29-35nm.

In the method, two phases system is formed under following condition: cadmium alkyl carboxylic acid containing 2-18 carbon or cadmium oxide as cadmium source; thiourea or thioacetamide as sulphur source; oleic acid or three octyl phosphine oxide (TOPO) as package agent; water in equivolume and organic compound not dissolved in water as solvent; heating 0.5-24 hours inside autoclave under 120-180 deg.C. Quantum points of cadmium sulphide in different sizes are obtained by changing reaction time. Or, quantum point near to size distribution of crystal seed in larger size is obtained by using obtained quantum point as crystal seed through reaction with new added reactive precursor. The invention realizes controllable size of quantum point, obtains quantum points in narrow distributed sizes. Light in royal purple or blue color is radiated under ultraviolet lamp. quantum efficiency is 3-60%.

The invention discloses an InP quantum point preparing method, comprising the steps of: (1) mixing InCl3 with trioctylphosphine oxide, and preserving heat at 90-110DEG C to prepare a solution whose In content is 0.1-0.3mol/L; (2) raising temperature to 130-180DEG C, and charging argon gas; (3) injecting P(Si(CH3)3)3 into InCl3-TOPO compound in the molar ratio of 1 to 1-1 to 2; (4) when the solution color turns into transparent red or orange, raising temperature to 260-270DEG C and preserving heat; (5) lowering temperature to 90-110DEG C and injecting dodecyl amine, decyl amine or mercaptan; (6) dissolving reacting mixture in nonpolar solvent to form transparent colloidal solution, then adding in polar solution until the colloidal solution is muddy, and centrifugally separating and obtaining deposits and supernatant; and (7) centrifugally separating the supernatant, where the above steps (1)-(5) are performed. And it has characters of high crystallizability, uniform size, and good optical properties.

The invention relates to a preparing method of cube platinum ruthenium core-shell nanocrystalline. The preparing method comprises the following steps that firstly, ruthenium(III)2,4-pentanedionate, a platinum-containing compound and trioctylphosphine oxide are dissolved in a mixed solution of oleylamine and N,N-dimethylformamide, wherein the platinum-containing compound is chloroplatinic acid or sodium chloroplatinate; secondly, the mixed solution obtained in the first step is stirred to be subjected to the reaction for 30-600 min at the temperature of 180-250 DEG C; and thirdly, a product obtained in the second step is separated, and then sediment, namely the cube platinum ruthenium core-shell nanocrystalline is obtained. The invention further relates to the cube platinum ruthenium core-shell nanocrystalline prepared through the method. According to the preparing method, the cube platinum ruthenium core-shell nanocrystalline uniform in appearance and size is obtained through a one-step method, the obtained product is moderate in size and good in dispersibility, and the preparing method is simple.

The present invention discloses a bionical rare earth organic complex light conversion agent and a preparation method thereof, and the composition of the bionical rare earth organic complex light conversion agent is as follows: SmM<1-x>(TTA)L. The light conversion agent chooses the easily obtained, cheap samarium ion as a central ion, lanthanum La<3 plus>, gadolinium Gd<3 plus> and yttrium Y<3 plus> as heterocaryotic central ions, organic compound (Alpha-thenoyltrifluoroaceton) with the lowest excited triplet level matching the Sm<3 plus> excited level as a ligand and o-phenanthroline, 2,2'-bipyridyl, trioctylphosphine oxide, triphenylphosphine oxide, etc. as second ligands. The method for preparing the light conversion agent includes the following steps: dissolution, stirring and reaction, deposition, filtration, washing, drying, grinding and finished product, and the appearance of the product is white or light yellow. The light conversion agent provided by the present invention can convert ultraviolet light into red light with a wavelength between 620nm and 660nm, the emitting efficiency is high, the color purity is high, and the strongest emission wavelength is close to the position of the maximum absorption peak of chlorophylls (a, b), so the light conversion agent can meet the physiological requirement of the photosynthesis of plants.

The invention provides a preparation method of calcium magnesium acetate and a device thereof. The preparation method comprises extracting pyroligneous liquor with an organic solvent, and stripping the pyroligneous liquor with dolomite or limestone or calcium magnesium hydroxide to prepare the calcium magnesium acetate, wherein, acetic acid in the pyroligneous liquor and the dolomite or the limestone or the calcium magnesium hydroxide are taken as raw materials. The method comprises the following steps: extraction step S1: taking trioctylamine, trioctylphosphine oxide and n-butyl alcohol as extractants, selecting poly-aluminium sulfate as a demulsifier, and firstly extracting the acetic acid in the pyroligneous liquor; back extraction step S2: taking the dolomite or the limestone as a back extractant, performing back extraction on the extracted acetic acid, and allowing the back-extractant to react with the back-extracted acetic acid to generate the calcium magnesium acetate; and filtering and drying step S3: implementing processes such as filtration, concentration, drying and the like on the obtained calcium magnesium acetate to prepare granular calcium magnesium acetate. The invention develops a method for preparing the calcium magnesium acetate with low cost, and provides a new way for high-value utilization of the pyroligneous liquor.

The invention discloses a wurtzite manganese selenide nanosheet material and a preparation method of the wurtzite manganese selenide nanosheet material. The wurtzite manganese selenide nanosheet material is characterized in that the wurtzite manganese selenide nanosheet material is prepared by reaction of divalent manganous salt, selenium, trioctylphosphine oxide and ligand; the crystal structure is ligand wurtzite structure and the shape is a square slice; the wurtzite manganese selenide nanosheet has adjustable dimension. The wurtzite manganese selenide nanosheet prepared by the invention is adjustable in dimension, good in dispersing property, high in phase purity, good in crystallinity, and uniform in grain diameter distribution; the preparation method is simple in operation, short in reaction time, high in repeatability, and others; the invention has a certain application potential in photocatalysis, solar cell, rare magnetic material and other fields.

The invention discloses a method capable of improving acid resistance during reverse extraction of an extraction agent containing pyridine carboxylic ester and dinonylnaphthalene sulfonic acid and an application of the method. The application method is characterized in that the acid resistance during reverse extraction of the extraction agent can be obviously improved after trioctylphousphine oxide is added into the extraction agent containing pyridine carboxylic ester and dinonylnaphthalene sulfonic acid; moreover, nickel content in reverse extraction liquor can meet industrial needs of nickel electrolyte, the effect of simultaneously extracting Ni and Co from a multi-metal acid solution containing Fe, Ca, Mg, Co and Ni is not affected, and the removal effect on iron-calcium-magnesium impurities is not affected.

The invention provides a cleaning method and a preparation method of quantum dots, and belongs to the technical field of quantum dots. The cleaning method of the quantum dots comprises the steps that: the quantum dots are dispersed in a first non-coordination solvent, a first coordination solvent is added, and stirring reaction is conducted for 20-40 min at the temperature of 80-120 DEG C; and ligands of the quantum dots are tri-n-octylphosphine oxide and/or octadecyl orthophosphate. The mole number of the first coordination solvent is 2-3 times of the mole number of cations of the quantum dots. The first coordination solvent is oleic acid and/or zinc oleate. For the quantum dots with tri-n-octylphosphine oxide and/or octadecyl orthophosphate as ligands, according to the cleaning method of the quantum dots, oleic acid and/or zinc oleate are/is adopted for exchanging the ligands on the surfaces of the quantum dots, the ligands on the surfaces of the quantum dots are changed into oleic acid and/or zinc oleate, and in the subsequent cleaning process, the cleaning yield of the quantum dots can be increased.

The invention provides a fuel cell anode catalyst and a preparation method and application thereof. According to the preparation method, transition metal is used as a metal source, trioctylphosphine oxide is used as a reaction solvent, a reaction product is prepared through a colloid synthesis method, and then the reaction product and a carbon carrier are subjected to a load reaction to obtain theload type transition metal phosphide anode catalyst. The anode catalyst has high-alkalinity HOR activity and high stability, is relatively low in preparation cost, is suitable for commercial mass production, and has a huge application prospect in the field of fuel cells. Specifically, ruthenium acetylacetonate is used as a ruthenium source, trioctylphosphine oxide is used as a reaction solvent, and tri-n-octylphosphine is used as a phosphorus source. The anode catalyst Ru2P/C is prepared according to the preparation method. When the loading capacity of the anode catalyst Ru2P/C is 0.4mgcm<-2>, the peak power of 1.3Wcm<-2> (the current density is 3.0Acm<-2>) can be achieved under the conditions of 80 DEG C and the back pressure of 0.1Mpa. The mass ratio exchange current density (j<0, m>) of the anode catalyst Ru2P/C is 0.27mAmug<-1>, the area ratio exchange current density (j<0, s>) of the anode catalyst Ru2P/C is 0.37mAcm<-2>, and the mass ratio exchange current density and the area ratio exchange current density of the anode catalyst Ru2P/C respectively reach three times of those of the Ru/C.

The invention relates to an extraction and separation method of a trace uranium element in a liquid sample and belongs to the technical field of trace analysis sample pretreatment. The method primarily utilizes a mixture of di-iso-amyl pentylphosphonate and trioctylphosphine oxide as an extraction agent, strictly controls a concentration of a nitric acid leaching solution, allows the uranium element to have a higher distribution coefficient and better adsorptive capacity, and therefore, achieves a better extraction and separation effect; and an ammonium carbonate solution with a specific concentration is used as an eluent to allow the uranium element to have a higher recovery rate. The extraction and separation method can achieve concentration of the trace uranium element in the liquid sample simply, conveniently and rapidly and separation of some interference heavy metal ions at the same time, and improves stability and reliability of a determination result of the trace uranium element in the liquid sample.

The invention relates to a composite extractant used in a metal indium extraction process. The composite extractant is formed by mixing Bis(2-ethylhexyl)phosphate (P204), trioctylphosphine oxide and hexylphosphine oxide mixture liquid (C923) and trialkyphosphine oxides (TRPO) according to certain proportion. After being diluted with sulfonated kerosene, the composite extractant is used as an extractant used for metal indium extraction. The composite extractant has good chemical stability, good selectivity and high indium extraction efficiency which can achieve more than 90%, simultaneously canreduce the extractant emulsification, is easy for re-extraction, and the demand to extraction conditions of a system is not high.

The invention provides a modified flame retardant plastic binder and relates to the technical field of binders. The plastic binder comprises 55-65 parts of solution, 20-30 parts of phenolic resin, 25-35 parts of polyethene, 7-14 parts of sodium alginate, 9-17 parts of sodium hexametaphosphate, 5-12 parts of light stabilizer, 3-7 parts of mildew preventive, 2-6 parts of zinc oxide, 4-8 parts of cupric oxide, 18-25 parts of flame retardant material and 11-16 parts of insulating material, wherein the solution comprises 20-26 parts of triethyl phosphate, 12-18 parts of trioctylphosphine oxide, 13-18 parts of diethyl malonate, 15-22 parts of triallyl cyanurate and 6-12 parts of allyl glycidyl ether. The binder has the benefits that the binder is higher in flame retardancy and insulativity, simple in preparation technology and good in safety and reliability.

The invention discloses a flame-retardant partition wall for space leasing. The flame-retardant partition wall comprises a set of two-layer flame-retardant plate bodies and a filling layer arranged between the two-layer flame-retardant plate bodies; the two-layer flame-retardant plate bodies are flame-retardant polyvinyl chloride double-layer plate materials containing flame-retardant smoke inhibitors, and the flame-retardant smoke inhibitors are prepared and obtained after alkyl hypophosphite, tributyltin and trioctylphosphine oxide as shown in a formula (I) are subjected to heating contact at the temperature of 200-300 DEG C; and in the formula (I), R1 is C1-C6 alkyl or phenyl, R2 is C1-C6 alkyl or phenyl, M is a metal element, and n is a positive integer from 1 to 4. According to the flame-retardant partition wall for space leasing, the flame-retardant smoke inhibitors used in the flame-retardant plate bodies do not lose the flame-retardant property in the high temperature machiningprocess, generating of brittle materials is also not found, and the obtained flame-retardant plate materials are good in mechanical properties, flame retardant and environmentally friendly.

The invention relates to a preparation method of a pyrite-type ferrous disulfide nanoscale single-crystal semiconductor material. The preparation method comprises the following steps that 1, an iron source and trioctylphosphine oxide are mixed; and the mixture is dissolved in oleylamine, then is stirred and is filled with argon or nitrogen so that oxygen is removed and an iron source precursor is obtained; 2, the iron source precursor is heated in an oil bath with stirring so that an iron source solution is obtained; 3, a sulfur source is dissolved in oleylamine, then is stirred and is filled with argon or nitrogen so that oxygen is removed and a sulfur source solution is obtained; 4, the sulfur source solution is heated, then is extracted by a needle tubing and then is fast injected into the iron source solution; the oil bath for heating the iron source solution is heated; and the mixed solution undergoes a reaction to produce pyrite-type ferrous disulfide colloid; and 5, the pyrite-type ferrous disulfide colloid is cooled to a room temperature and then is added with a trichloromethane-ethanol mixed solution; the mixture is subjected to washing and centrifugation until an upper centrifugate is colorless; and the washed sample is sealed in a chloroform solution. The pyrite-type ferrous disulfide nanoscale single-crystal semiconductor material obtained by the preparation method has uniform particle sizes and morphology, and stable quality. The preparation method has good repeatability.

The invention discloses a method for removing impurity peaks in a quantum dot emission spectrum, and belongs to the technical field of semiconductors. The method comprises the following steps: freezing a quantum dot solution to precipitate quantum dots corresponding to impurity peaks, and then removing precipitates, wherein quantum dots in the quantum dot solution comprise at least one of II-VI group quantum dots and III-V group quantum dots, and a first ligand coordinated with quantum dot cation elements in the quantum dot solution comprises tri-n-octyl phosphine oxide, octadecyl ortho-phosphate or oleic acid. According to the method, impurity peaks in the quantum dot emission spectrum can be effectively removed, and later growth of quantum dots is facilitated.

The invention aims to provide a trioctylphosphine oxide compound and a preparation method thereof, which is high in yield, low in cost and moderate in reaction conditions. In order to fulfill the aim of the invention, the technical scheme of the invention is that the preparation method for the trioctylphosphine oxide compound comprises the following steps of: preparing trioctylphosphine oxide from sodium hypophosphite by performing octene addition, trichlorosilane reduction, bromoalkane addition and hydrolysis in turn; or preparing the trioctylphosphine oxide from the sodium hypophosphite by performing the octene addition, the trichlorosilane reduction, the hydrolysis and the octene addition again in turn; or preparing the trioctylphosphine oxide from the sodium hypophosphite by performing the octene addition, the trichlorosilane reduction and alcoholysis in turn. According to the synthesis method provided by the invention, the selected raw materials are easy to obtain; the addition reaction is performed on the sodium hypophosphite and octene, so that the reaction conditions are moderate and are easy to control; the operation safety is enhanced; the reaction yield is high and can reach over 90 percent; the trioctylphosphine oxide is convenient to purify; and the product purity is high.