6results about How to "No preprocessing required" patented technology

The invention provides a wurtzite boron nitride / diamond composite material and a preparation method and application thereof, the composite material is composed of two phases of wurtzite boron nitride and diamond, and has a stacked sandwich microstructure, the sandwich microstructure comprises at least one first wurtzite boron nitride layer and at least one second wurtzite boron nitride layer, wherein the first wurtzite boron nitride layer is formed by wurtzite boron nitride; at least one second wurtzite boron nitride layer composed of wurtzite boron nitride; the composite material comprises a first wurtzite boron nitride layer, a second wurtzite boron nitride layer and a diamond layer, the diamond layer is arranged between the first wurtzite boron nitride layer and the second wurtzite boron nitride layer and is made of diamond, wurtzite boron nitride is a metastable phase stably existing under normal pressure, and the Vickers hardness of the composite material is larger than 50 GPa. The novel wurtzite boron nitride / diamond composite material disclosed by the invention has high hardness, high toughness and high thermal stability, and the preparation method disclosed by the invention is low in initial raw material price and simple in preparation process.

The application provides a wurtzite boron nitride / diamond composite material and a preparation method and application thereof. The composite material is composed of two phases of wurtzite boron nitride and diamond, and has a stacked sandwich microstructure, which comprises at least one first wurtzite boron nitride layer composed of wurtzite boron nitride, at least one second wurtzite boron nitride layer composed of wurtzite boron nitride, and a diamond layer composed of diamond and sandwiched between the first wurtzite boron nitride layer and the second wurtzite boron nitride layer. The wurtzite boron nitride is a metastable phase stably existing under normal pressure, and the Vickers hardness of the composite material is greater than 50 GPa. The novel wurtzite boron nitride / diamond composite material has high hardness, high toughness and high thermal stability, and the preparation method has low starting material price and simple preparation process.

The present invention discloses the preparation of a ratio fluorescent probe and its application in nitrite detection, wherein a ratio fluorescent probe system is constructed by using blue luminescent carbon dots BCDs as an internal reference and gold nanoclusters Au NCs@ew as a sensing unit. 2 ‑ It can be used as a detection reagent in the detection process of NO 2 ‑ Visual qualitative or quantitative detection. The ratiometric fluorescent probe of the present invention has good sensitivity, selectivity and fast response speed. 2 ‑ With the increase of NO concentration, the ratio fluorescent probe provides a continuous fluorescence color change from red to blue. The ratio fluorescent probe of the present invention has an extraordinary detection limit (LOD) of 9.38nM and completes the response within 1s, which means that the ratio fluorescent probe of the present invention is effective in the field and quantitative analysis of NO. 2 ‑ It has great application potential in the analysis of NO 2 ‑ Provides an effective way.

The invention belongs to the technical field of high polymer materials, and relates to a C-H direct arylation polymerization method for synthesizing a conjugated polymer. The conjugated polymer is constructed through direct C-H arylation reaction under palladium catalysis, and the method has the advantages of being simple and safe in synthesis operation, high in regioselectivity and wide in substrate range. Besides, the prepared conjugated polymer realizes halogen atom retention, a space is provided for further functionalization of the polymer, and meanwhile, the carrier transport capability of the conjugated polymer is enhanced by the retained halogen atoms, so that the requirement of high carrier mobility of an organic electronic device is met.

The invention provides a colorimetric-fluorescent dual-mode cortisol detection kit and a method. The kit comprises a detection tube, a magnetic bead modified antibody solution, a Cu-MOF modified cortisol solution and a tetramethyl benzidine TMB solution. In the detection process, after a magnetic bead modified antibody solution, a Cu-MOF modified cortisol solution and a detected sample are mixed and react, magnetic beads are separated out and react with a TMB solution; detecting the absorbance of the reaction product at the wavelength of 650 nm and the fluorescence intensity of the reaction product at the wavelength of 520 nm; and obtaining the cortisol concentration in the detected sample according to the ratio of the two. According to the method, the characteristic that Cu-MOF has the fluorescence characteristic and simulates peroxidase activity is utilized, two indexes including absorbance and fluorescence intensity are obtained in the same cortisol detection system at the same time, and the ratio of the absorbance with the wavelength of 650 nm to the fluorescence intensity with the wavelength of 520 nm is used as an index for judging the cortisol concentration; the accuracy of cortisol detection is obviously improved.

The application provides a treatment method of lithium iron phosphate pyrolysis residue, and belongs to the technical field of lithium ion battery materials. The treatment method comprises the following steps: primary magnetic separation, reduction activation and secondary magnetic separation. Elemental iron is separated through the primary magnetic separation, and then the remaining non-magnetic residue is subjected to reduction activation, so that FeP / Fe2P is converted into weakly magnetic Fe3P, and then Fe3P is enriched and separated through the secondary magnetic separation. Through the multi-stage magnetic separation and reduction activation, iron and phosphorus in the lithium iron phosphate pyrolysis residue can be effectively separated and recovered, and the purity of the recovered product is high.