47 results about "Trioctylphosphine oxide" patented technology

Method for the preparation of inorganic-NP-composite microgels is based on the reversible transfer of microgels between water and an organic solvent such as tetrahydrofuran (THF). The method is used to produce semiconductor nanocrystals, often referred to as quantum dots (QDs) which are well known for their unique optical, electrical, magnetic and catalytic properties, as the inorganic NPs, recognizing that the best quality QDs are synthesized by a high temperature process in organic media, and have their surface covered with hydrophobic ligands (such as trioctylphosphine oxide, TOPO) that render the NPs insoluble in an aqueous solution.

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 can reduce the extractant emulsification, is easy for re-extraction, and the demand to extraction conditions of a system is not high.

In a process for recovering acetic acid from a wood extract, an aqueous wood extract is provided that contains acetic acid and dissolved hemicellulose containing uronic acid. A water insoluble solvent containing an extractant for the acetic acid is also provided. In a preferred embodiment, the solvent is undecane and the extractant is trioctylphosphine oxide. The wood extract is contacted with the solvent and extractant in order to extract the acetic acid from the wood extract. The acetic acid is then recovered from the solvent and extractant.

The invention belongs to the technical field of quaternary chalcogenide semiconductor materials, and specifically discloses a Cu 2 ZnB 2 S 3 Nanorods were prepared as follows: under an inert atmosphere, copper acetylacetonate, zinc acetate, bismuth nitrate, and trioctylphosphine oxide were mixed in a stoichiometric ratio to form a complex, and then the sulfur precursors dodecanethiol and t-dodecylphosphine oxide were added. Alkylthiol, reacted for 1 to 3 hours, and separated to obtain the Cu 2 ZnB 2 S 3 Nano stave. Compared with the existing quaternary chalcogenide semiconductor materials, the photocatalytic performance of the nanorods of the present invention is improved. The present invention provides a kind of brand-new Cu 2 ZnB 2 S 3 Nanorods can be used in photocatalysis, photovoltaics, and photodiode sensor materials, and have good application prospects in the manufacture of LEDs, integrated circuits, transistors, and semiconductor lasers.

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 preparation method of a fire-retardant partition wall for space lease. The fire-retardant partition wall for space lease comprises a group of double-layer flame-retardant plate bodies and a filling layer arranged between the double-layer flame-retardant plate bodies, wherein the double-layer flame-retardant plate bodies are a flame-retardant polyvinyl chloride double-layer board material containing a flame-retardant smoke suppressant, and the flame retardant smoke suppressant is prepared through heating contact of an alkyl phosphinate as shown in a formula (I), tributyltin, tri-n-octylphosphine oxide and melamine at 220-280DEG C, wherein 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 integerfrom 1 to 4. According to the preparation method of the fire-retardant partition wall for space lease, the flame-retardant smoke suppressant does not lose flame-retardant performance during a high-temperature processing process, and does not produce fragile substances; and the obtained fire-retardant partition wall has good mechanical properties, is flame-retardant, and is environmentally friendly, therefore, the fire-retardant partition wall has very high promotion and application values.