6results about How to "Novel method" patented technology

This invention discloses a method for synthesizing phosphine oxide derivatives based on [2.2] p-cycloaranes. Using thionium salts and disubstituted phosphine oxides as starting materials, Ni(COD)₂ as a catalyst, CuBr as a co-catalyst, PPh₃ as a ligand, and K₃PO₄ as a base, the reaction yields phosphine oxide derivatives. This method is novel, uses readily available raw materials, is simple to operate, has simple and mild reaction conditions, and has broad substrate applicability.

The utility model relates to the technical field of vehicle lamp circuits, in particular to a rectified triode amplification vehicle lamp circuit, a vehicle lamp and a vehicle. A rectified triode amplification car lamp circuit comprises a direct current power supply; the input filtering module is connected with the output end of the direct-current power supply; the inversion rectification module comprises an inverter and a rectification unit, the input end of the inverter is connected with a direct current power supply, and the rectification unit rectifies alternating current output by the inverter into direct current; the power supply input end of the triode amplification circuit module is connected with the output ends of the input filtering module and the inversion rectification module respectively; and the LED lamp panel module is connected with the output end of the triode amplification circuit module and is driven by the amplified electric signal to emit light. According to the circuit, after alternating current is rectified, sine-wave-like light and shade changes of the automobile lamp are achieved through the triode amplifying circuit, the circuit is simple and low in cost, and reasons are easy to find when the circuit goes wrong.

The invention discloses a preparation method of a nickel-loaded nitrogen-doped lignin derived carbon-based catalyst for CO2 electroreduction. According to the method, lignin is adopted as a carbon source, melamine is adopted as a nitrogen source, a nickel-containing compound is adopted as a metal source, and the nickel-loaded and nitrogen-doped carbon-based catalyst is prepared through a simple loading and doping technological process. When the catalyst is applied to electrocatalytic CO2 reduction, it is found that the catalyst shows excellent catalytic activity on CO2 reduction, the existence form of metal Ni in the catalyst is changed by adjusting the Ni loading amount, and then the selectivity of CO in a CO2 electrocatalytic reduction product is changed. Compared with a traditional CO2 electrocatalyst, the lignin carbon source adopted in the method is a renewable solid waste resource, and the raw material cost is low; the technological process is simple and easy to operate; meanwhile, distribution of reduction products can be regulated and controlled by regulating and controlling preparation process parameters, and more application prospects are provided for electrocatalytic CO2 reduction.

This invention discloses a method for preparing copper-based nanomaterials rich in two-dimensional defects and their application in electrocatalytic CO2 reduction. The method involves inducing two-dimensional defects in the copper-based nanomaterials through halogen (F, Cl, Br, and I) doping during electrochemical deposition, thereby obtaining copper-based nanomaterials rich in two-dimensional defects. This invention, through electrochemical deposition, effectively incorporates halogen elements into copper nanomaterials, inducing different defects and active sites, enhancing the adsorption capacity of reaction intermediates, and improving the conversion of carbon dioxide (eCO2RR) to more carbon (C) atoms. 2+ The conversion efficiency of the product can be affected, and the type and size of defects can also be changed by adjusting the type and concentration of halides in the electrolyte.

This invention relates to the field of organic chemistry, and more particularly to 4-(2,5-dioxotetrahydrofuran-3-yl)-1,2,3,4-tetrahydronaphthalene-1,2-dicarboxylic anhydride, its preparation method, and its applications. The preparation method includes: styrene and butenedioic acid diester undergoing an addition reaction under the action of a polymerization inhibitor to obtain an addition product; the addition product is then subjected to a hydrolysis reaction and a dehydration reaction sequentially to obtain 4-(2,5-dioxotetrahydrofuran-3-yl)-1,2,3,4-tetrahydronaphthalene-1,2-dicarboxylic anhydride. The preparation method of this invention features a simple synthetic route, high reaction selectivity, high product yield, and suitability for industrial production.

The application discloses a kind of field crop green area index calculation methods based on voxel size optimization, and the method steps are as follows: obtain field crop point cloud by laser radar;Obtain crop green component point cloud using intensity information difference;Crop green component point cloud is voxelized, and three-dimensional voxel model is obtained;Crop green area index is obtained by applying voxel size optimization algorithm.The crop green area index calculated by the method of the application is compared with the green area index measured in the field, the feasibility and accuracy of the algorithm are verified, and it is shown that the method of the application realizes the rapid, accurate and non-destructive extraction of the green area index of field crops, and has high universality, which provides a theoretical basis and technical support for the extraction of the green area index of field crops.