5 results about "Oleodaphnoic acid" patented technology

The invention discloses a preparation method of a copper-palladium alloy loaded nano titanium dioxide semiconductor material as a catalyst for a carbon dioxide reduction reaction. Firstly, alloy nanoparticles are generated through a sol-gel method, the morphology of the nanoparticles is controlled and agglomeration is prevented through oleylamine and oleic acid, and borane-tert-butylamine is added at the temperature of 170 DEG C to regulate and control the sizes of the generated alloy nanoparticles. A series of characterizations prove that the catalyst has a very good particle loading condition, uniform particle distribution and increased reaction active sites, and shows excellent activity when being applied to a carbon dioxide reduction reaction, when the loading capacities of copper and palladium are respectively 1%, the activity of the obtained catalyst is the highest, the methane generation rate can reach 20.23 mol / g / h, and the methane generation rate can reach 20.23 mol / g / h. The selectivity of methane reaches 100%.

The present application relates to the technical field of detection, and relates to a preparation method of an oxygen-rich vacancy Mn3O4 nanoscale enzyme, and the method comprises the following steps: step one: adding KMnO4 into deionized water according to a ratio of 0.5-1.5 g:500 ml, and completely dissolving to obtain a mixed solution; step two: adding oleic acid according to a volume ratio of 1:50, and continuously stirring at 25-35 DEG C for 4-6 hours; step three: collecting the precipitate, washing with deionized water and ethanol alternately for 4-6 times, drying at 70-90 DEG C for 8-12 hours, and calcining at 180-220 DEG C for 4-6 hours, so as to obtain an oxygen-rich vacancy Mn3O4 nanoscale enzyme with oxidase activity; and the oxygen-rich vacancy Mn3O4 nanoscale enzyme can detect nitrite rapidly, sensitively and specifically.

This application discloses a method for synthesizing CdS quantum dots with β-mercaptoethanol as a ligand and its applications, relating to the field of chemical synthesis technology. The CdS quantum dots have a particle size of 5-7 nm, a hexagonal wurtzite structure, and their surface is modified with β-mercaptoethanol via ligand exchange. The preparation method involves first preparing CdS quantum dots with oleic acid ligands via a hot-injection method, and then performing ligand exchange with β-mercaptoethanol under alkaline conditions. These quantum dots can efficiently catalyze the breaking of carbon-oxygen bonds in lignin β-O-4 model compounds under visible light irradiation, achieving a conversion rate of up to 100% and exhibiting good cycle stability. This invention provides a new approach for the design of CdS-based photocatalysts and has green and sustainable application prospects in the fields of lignin resource utilization and wastewater treatment.

This invention discloses a method for preparing highly stable CsMnBr3 / ZrO2 core-shell perovskite quantum dots and their fluorescent thin films. The method employs a room-temperature precipitation-hydrolysis coating method, using oleic acid, oleylamine, etc., as ligands to synthesize CsMnBr quantum dot cores. Then, a zirconium source (such as zirconium tert-butoxide) is introduced, and a dense zirconium oxide (ZrO) shell is formed in situ on the quantum dot surface through controlled hydrolysis. Strong chemical bonding is achieved between the core and shell through halogen-zirconium bonds. This method requires no high temperature or inert atmosphere protection and is simple to implement. The resulting core-shell quantum dots are not only completely lead-free, but the zirconium oxide shell simultaneously achieves surface passivation, lattice stability, and physical isolation from water and oxygen. While significantly improving environmental and thermal stability, it perfectly maintains the high fluorescence quantum yield of the quantum dots and enhances stability. The resulting spin-coated fluorescent thin films have great potential for application in optoelectronic devices.

This invention belongs to the field of X-ray radiation dose detection. A rare-earth core-shell nanomaterial for ratiometric X-ray dose detection, with the molecular formula CaF2:Eu, is disclosed. 2+ / Eu 3+ @BaF2. Its preparation method includes the following steps: reacting oleic acid, octadecene, calcium trifluoroacetate, and europium trifluoroacetate at high temperature to obtain core nanocrystals, then adding barium trifluoroacetate and reacting at high temperature to obtain the product. A characteristic of this product is that it can simultaneously produce Eu under X-ray irradiation. 2+ and Eu 3+ The scintillation spectrum shows that the shell BaF2 can improve the absorption coefficient, which is low. As the irradiation dose gradually increases, Eu... 2+ With Eu 3+ The ratio of scintillation intensity gradually increases, enabling ratiometric X-ray dose detection, which has a promising application prospect in the field of high-precision X-ray detection.