31 results about "Trioctyl phosphine oxide" patented technology

A method for producing highly monodisperse nanocrystals comprising the steps of: a) preparing a precursor comprising a metal ion and a coordinating ligand; b) dissolving the precursor in a solvent mixture comprising coordinating solvent and optionally non-coordinating solvent; c) raising the temperature of the step b mixture into the range from 150° C. to 350° C.; d) adding a chalcogen to the step c heated mixture whereby the chalcogen reacts with the precursor; e) lowering the temperature of the step d mixture to stop the reaction; and e) maintaining the step e cooled mixture for sufficient time at sufficient temperature to narrow the size distribution of the nanocrystals. The methods greatly reduce or eliminate the need for trioctylphosphine oxide (TOPO); provide control over particle size, and permits facile production of high quality nanocrystals with very small diameters (<4 nm). CdSe nanocrystals produced via the methods are shown in the Figure.

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 relates to the field of food detection, in particular to a preparation method of a cobalt sulfide nanomaterial and a method for detecting hydrogen peroxide with the cobalt sulfide nanomaterial. O-dichlorobenzene, oleic acid and trioctyl phosphine oxide react with an o-dichlorobenzene solution containing carbonyl cobalt, then reaction products react with an o-dichlorobenzene solution containing sulfur, the reaction products are sequentially washed and centrifuged with methanol and distilled water repeatedly, and cobalt sulfide nanomaterial powder is obtained. According to the method for detecting hydrogen peroxide with the cobalt sulfide nanomaterial, to be specific, a phosphate buffer solution of cobalt sulfide is added to a Tirs-Hcl buffer solution, then a to-be-detected solution and a TMB color developing agent are added, and whether the to-be-detected solution contains hydrogen peroxide or not is judged through observation of color reaction. The method is high in detection speed and accuracy and has better specificity to detection of hydrogen peroxide.

Disclosed are an electrode active material, having a composition of SnPx (0.9≦x≦0.98), an electrode comprising the same, and a lithium secondary battery comprising the electrode. Also disclosed is a method for preparing an electrode active material having a composition of SnPx (0.9≦x≦0.98), the method comprising the steps of: preparing a mixed solution of a Sn precursor, trioctyl phosphine (TOP) and trioctyl phosphine oxide (TOPO); and heating the solution. The application of the teardrop-shaped single-crystal SnPO-94 particles as an anode active material for lithium secondary batteries can provide an anode having very excellent cycling properties because the active material has a reversible capacity, which is about two times as large as that of a carbon anode, along with a very low irreversible capacity, and it is structurally very stable against Li ion intercalation/deintercalation in a charge/discharge process, indicating little or no change in the volume thereof.

The invention discloses a double-antibody sandwich method for quickly detecting a novel H1N1 influenza virus, comprising the following specific steps: designing the HA1N end spherical sub-gene primer of an amplified-expression novel H1N1 influenza virus; carrying out PCR (Polymerase Chain Reaction) amplification; connecting a target segment with a carrier pET100/D-TOPO (trioctyl-phosphine oxide), and building a recombinant plasmid; converting an expression cell (escherichia coli BL21); expressing IPTG (isopropyl beta-D-thiogalactopyranoside) induced recombinant protein; analyzing the antigenicity of a purified product by indirect ELISA (enzyme-linked immuno sorbent assay) and Western blottin; purifying the recombinant protein by a HisTrapTMHP (histidine) affinity adsorption column purification system; preparing rabbit serum by a recombinant protein immune rabbit; carrying out ELISA coating by the prepared rabbit serum; taking the rabbit resisting H1N1 influenza virus hemagglutinin protein marked by a horse radish peroxidise as a second antibody; and building a double-antibody sandwich method for detecting the novel H1N1 influenza virus antigen. The method can be used for carrying out quick and effective antigen diagnosis, is convenient to use and accurate to detect, and is suitable for being popularized and applied to areas, such as border ports and the like.

The present invention relates to a method for preparing a fluorescence nanometer material, in particular to a method for preparing II type CdTe/CdS core-shell quantum dots. The method comprises the following steps that: firstly, a precursor solution of cadmium is prepared from CdO, stearic acid and octadecene in the presence of argon gas; a precursor solution of tellurium is prepared in a sealed container, from tellurium powder, trioctyl phosphine and octadecene; a stock solution of cadmium is prepared by dissolving CdO with an oleic acid and octadecene; a stock solution of sulfur is prepared by dissolving sulfur powder with octadecene; trioctyl phosphine oxide and hexadecylamine are added into the precursor solution of cadmium, and the precursor solution of tellurium is subjected to quick injection and cooling in the presence of argon gas, and thus CdTe quantum dots are obtained; the stock solutions of cadmium and sulfur are added after sampling and purification, which are cooled to between 30 and 50 DEG C, and then the II type CdTe/CdS core-shell quantum dots are obtained by methanol deposition processing. The method is simple in operation and low in cost. The obtained quantum dots have the typical optical character of the II type core-shell quantum dots.

An object of the present invention is to provide a method for separating and refining scandium capable of efficiently separating and refining the scandium from a solution containing the scandium, with improved stripping, while securing separability (selectivity) of the scandium from impurity elements. The method of the present invention involves mixing a solution containing the scandium with an organic solvent containing a trioctylphosphine oxide to extract the scandium into the organic solvent; and mixing the organic solvent with a stripping starting solution containing any one or more of water, hydrochloric acid, sulfuric acid, and oxalic acid to strip the scandium from the organic solvent.

In the invention, alkoxylcadimium used as reacting cadmium source and trioctyl phosphine oxide are formed ligand solution in temp, 100 deg.C, then reacted with selenium single-compound solution in proper temp. to create crystal nucleus of cadimium selenide, or alkoxylcadimium is direct mixed with selenium single-compound and dissolved normal-butyl phosphorus to form single precursor, further to create crystal nucleus of cadimium selenide, finally to produce cadimium selenide nanometre particles with different size and shapes by adjusting temp, and time, the ultraviolet adsorbing and fluorescence spectroscopic data of sol formed in methylbenzene dissolvant indicates said products has very good quantum characteristic and very narrow size distribution. The final product is cadimium selenide nanometre particles with high quality, single size distribution and with out needing size classifying.

The invention provides a preparation method of core-shell InP/ZnS nanorods, comprising: in inert atmosphere, mixing indium chloride or indium oxide, trioctyl phosphine oxide, dodecylamine and tri-n-octylphosphine to obtain mixed liquid, heating and degassing in vacuum, heating in the inert atmosphere to form transparent indium precursor solution; in inert atmosphere, preparing tris(trimethylsilyl)phosphine precursor with tris(trimethylsilyl)phosphine, diphenyl ether and biphenyl; in inert atmosphere, heating the indium precursor solution to 290-320 DEG C, injecting the tris(trimethylsilyl)phosphine precursor into the indium precursor solution, adjusting the temperature to 295-305 DEG C, and reacting to obtain an InP nanorods; in inert atmosphere, injecting zinc fatty acid and 1-dodecanethiol into InP nanorod solution under heating to prepare the core-shell InP/ZnS nanorods.

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 belongs to the technical field of quaternary chalcogenide semiconductor materials, and particularly discloses a Cu2ZnBi2S3 nano-rod. The preparation method comprises the following steps:in an inert atmosphere, mixing copper acetyl acetonate, zinc acetate, bismuth nitrate and trioctyl phosphine oxide according to a stoichiometric ratio to form a complex, then adding sulfur precursors: dodecyl mercaptan and tert-dodecyl mercaptan, reacting for 1-3 hours, and separating to obtain the Cu2ZnBi2S3 nano-rod. Compared with an existing quaternary chalcogenide semiconductor material, thephotocatalytic performance of the nano-rod is improved. The brand-new Cu2ZnBi2S3 nano-rod provided by the invention can be applied to photocatalysis, photovoltaic and photodiode sensor materials, andhas a good application prospect in manufacturing of LEDs, integrated circuits, transistors and semiconductor lasers.

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 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.

The invention discloses a flame-retarding smoke inhibitor and a preparation method thereof. The preparation method of the flame-retarding smoke inhibitor includes a step of heating and containing alkylphosphinate, tributyltin and trioctylphosphine oxide shown in formula (I) at 200-300DEG C, wherein in formula (I), R1 is C1-C6 alkyl group or phenyl group; R2 is C1-C6 alkyl group or phenyl group; Mis metal element, n is integer from 1 to 4. The flame-retarding smoke inhibitor can improve its flame retarding performance in application material on the basis of keeping low smoke density of phosphinate, no environmental harm and other advantages; the smoke inhibitor cannot generate fragile matters and reduce the influence on the mechanical performance of a principal material base body; the rawmaterials of the flame-retarding smoke inhibitor is low in price and easy to obtain, so that the flame-retarding smoke inhibitor has high popularization and application value.

The invention relates to the technical field of fluorescent nanometer materials. In order to solve the problems of tedious preparation process and easy fluorescence intensity loss of the existing quantum dot fluorescent nanospheres, the invention provides a quantum dot fluorescent nanosphere based on an amphiphilic silicon carrier, and a preparation method thereof, wherein the quantum dot fluorescent nanosphere based on the amphiphilic silicon carrier is formed by coating the surface of hexadecylamine and trioctylphosphine oxide co-modified cadmium selenide/zinc sulfide quantum dot with a silicon dioxide layer. According to the invention, the quantum dot fluorescent nanosphere is regular in form, controllable in quantum dot coating amount and size, high in luminescence and stable in performance; and the preparation method is simple, wherein the size of the nanospheres and the coating amount of the quantum dots can be effectively reduced and increased by adjusting the concentration of the quantum dots, and the more surface functional modification and assembly are expected to be achieved through the controllable silicon dioxide shell growth.

The invention discloses a flame-retardant board for leasing space and a preparation method thereof. The preparation method comprises the following steps: mixing polyvinyl chloride, a filler, a stabilizing agent, stearic acid, an ACR modifier and a flame-retardation and smoke-suppression agent, and then subjecting the obtained mixture to extrusion molding. The flame-retardation and smoke-suppression agent is prepared by subjecting alkyl phosphinate as shown in a formula (I) which is described in the specification, tributyltin and trioctylphosphine oxide to heating and contacting at 200 to 300 DEG C. In the formula (I), R1 is a C1-6 alkyl group or a phenyl group; R2 is a C1-6 alkyl group or a phenyl group; M is a metallic element; and n is number in a range of 1 to 4. The flame-retardation agent in the board does not lose flame retardation performance during high-temperature processing, and formation of brittle substances is not found; and the flame-retardant board has good mechanical properties, flame retardation performance, environment friendliness and high promotion and application value.