15 results about "Molecular precursor" patented technology

The invention discloses a high-dispersion cobalt-based catalyst and a preparation method and application thereof, and belongs to the technical field of cobalt-based catalysts.The preparation method comprises the steps that tetracarboxyl cobalt phthalocyanine and nitrogen-defect carbon nanotubes serve as raw materials, a pre-assembled compound is formed in an organic solvent through molecular self-assembly, then programmed microwave heating is conducted on the pre-assembled compound, and the high-dispersion cobalt-based catalyst is obtained. According to the high-dispersion cobalt-based catalyst and the preparation method thereof disclosed by the invention, a means of combining a specific molecular precursor and carrier defect engineering is utilized, a'molecular anchor-anchor positioning 'pre-connection system is constructed through liquid-phase pre-assembly, and a programmed microwave energy accurate input principle is supplemented, so that the high-dispersion cobalt-based catalyst is obtained. The key technical problems that when the cobalt-based catalyst is prepared through an existing microwave method, metal atoms are prone to agglomeration, the active site structure is uncontrollable, and the catalytic performance is ordinary are successfully solved.

The invention discloses an enzyme-activated fluorescent molecular precursor as well as a preparation method and application thereof. The enzyme-activated fluorescent molecular precursor has a chemical structure as shown in a formula I which is described in the specification. The invention develops an enzyme-activated fluorescent molecular precursor which can be used for real-time imaging of tumors by targeting exogenous enzyme to the tumors and specifically activating a probe at the tumors; according to the invention, the exogenous enzyme is introduced as an activation trigger, and normal cells do not have the exogenous enzyme, so that the problem of co-expression of the endogenous enzyme in non-tumor tissues can be avoided, background fluorescence signals can be reduced to the greatest extent, and the imaging specificity and accuracy are remarkably improved.

A method of doping a battery cathode includes preparing a coating with a complex including a metal-based molecular precursor, applying the coating to a battery cathode, and calcining the coating applied to the battery cathode at a calcination temperature of at least 300° C.

This invention belongs to the field of semiconductor nanofilm technology, specifically relating to a ternary metal sulfide nanocrystalline thin film, its preparation method, and its applications. Based on a low-temperature solution process, this invention innovatively employs a two-step method to prepare ternary metal sulfide nanocrystalline thin films in situ on a substrate. First, a molecular precursor is prepared by dissolving a metal salt using a short-chain organic amine as a solvent. The soft template effect of the organic linear amine is then used to prepare a porous cationic thin film on the substrate. Subsequently, a sulfur source precursor solution is prepared by dissolving a sulfur source in acetone, an orthogonal solvent that does not damage the cationic thin film. This solution is then used to treat the cationic thin film multiple times before low-temperature annealing to form the ternary metal sulfide nanocrystalline thin film. The prepared film exhibits high-purity phase, standard stoichiometry, and excellent light absorption performance. The film surface shows no obvious agglomeration and exhibits good flatness and density. It has great application potential as an absorption layer for various optoelectronic devices.

One aspect of the invention provides a method of making a thermal vapor coated article including a chemical vapor deposition of a coating on a surface of the article. The method includes exposing the article to one or more of an inorganic precursor, an organic molecular precursor, a precursor to produce oxides or nitrides, or a combination thereof, wherein the coating is one or more of resistant to adhesion of biomolecules to the coated surface or inert to analytes in contact with the coated surface.

The invention relates to a preparation method of microenvironment response type allosteric cross-linked oral nanogel. The preparation method comprises the following steps: S1, synthesizing a catechol modified HA molecular precursor HA-DA; s2, synthesizing a Se-HA-DA conjugate cross-linked with a diselenide bond and a C-HA-DA conjugate cross-linked with a carbon bond by taking the HA-DA dialyzed and acidified in 0.01 M HCl as a substrate; and S3, preparing the endogenous response'allosteric-crosslinking 'nanogel carrying the DNase I by taking the Se-HA-DA conjugate cross-linked with the selenium bond or the C-HA-DA conjugate cross-linked with the carbon bond as a precursor substance of the nanogel. Due to the adoption of the technical scheme, too high barrier rigidity caused by an irreversible cross-linking structure can be reduced, and the mechanical requirement of tissue repair is adapted through a dynamic cross-linking network in the process of allosteric and cross-linking. The invention relates to an application of a microenvironment response type allosteric cross-linked oral nanogel.

This disclosure belongs to the field of carbon nanotube preparation technology, and provides a system and method for the continuous preparation of array-type carbon nanotubes. The system includes a reaction vessel, an atomization system, a pyrolysis furnace, a classifier, a feeder, and a CVD fluidized bed connected in sequence. Preparation method: The catalyst is designed with the chemical formula Fe. a Co b Ni c Mg d Al e Mo f Mn g V h The catalyst solution was prepared according to the stoichiometric ratio of the above chemical formula, and the reaction was carried out sequentially in the above system to finally obtain arrayed carbon nanotubes. This disclosure utilizes the rapid and one-step characteristics of spray pyrolysis, combined with precise catalyst structure design, to obtain a catalyst with high-density active sites and small active site particle size, achieving efficient, continuous, and controllable preparation from molecular precursors to high-performance arrayed carbon nanotubes. Furthermore, the spray pyrolysis method can be used to prepare catalysts with high activity and low bulk density, which is beneficial for CVD fluidized bed production of arrayed carbon nanotubes.

To provide an inspection kit that can enable a robust inspection of the amount of introduction of a reporter molecule precursor, and a method for designing an inspection kit.SOLUTION: An inspection kit for detecting a target nucleic acid sequence in a specimen comprises a lateral flow assay (LFA) test paper. The LFA test paper inspects a reaction solution obtained by adding the specimen to a reaction liquid including a Cas enzyme and a reporter molecule precursor and subjecting the reaction solution to the CRISPR-Cas reaction. The LFA test paper comprises a labeled part including a labeled antibody, a first detection line to which a capture molecule for capturing the reporter molecule precursor is fixed, and a second detection line to which a capture antibody for capturing the labeled antibody is fixed. The amount A of the labeled antibody and the mount S of the capture molecule on the LFA test paper satisfy the conditions of A≥10-12 mol and 1≤S / A.SELECTED DRAWING: Figure 1

The application discloses an inorganic structure reinforcing agent and a preparation method and application thereof. The reinforcing agent comprises inorganic cations, anions, a molecular mediation agent and silicon / aluminum molecular precursors. The application is based on the concept of homogenous reinforcement, and utilizes the molecular mediation agent to integrate different components into a stable fluid, realizes deep penetration and avoids premature solidification. After the fluid fully penetrates and the molecular mediation agent is removed, the components in the system are solidified to form a reinforced structure which is highly matched with the original structure in physical properties. The homology between the materials ensures the maximum compatibility of the reinforced phase and the original structure in the properties such as the thermal expansion coefficient and the elastic modulus, overcomes the defects such as the easy yellowing and aging of organic materials and the large difference in thermal expansion, solves the drawbacks such as poor permeability and easy generation of microcracks of traditional inorganic reinforcing agents, improves the mechanical strength and weather resistance of the structure, and realizes good compatibility and stable reinforcement of the materials.

The application discloses a method for preparing Ba x Pb 1‑x S alloy by using a molecular precursor route, which comprises the following steps: firstly, synthesizing barium dibutyl dithiocarbamate and lead dibutyl dithiocarbamate solids; dispersing the two kinds of solids by using carbon disulfide to obtain a mixed solution; and reacting and alloying under the condition of nitrogen to obtain Ba x Pb 1‑x S alloy powder; or dropping and coating the mixed solution on a quartz glass and reacting and alloying to obtain a Ba x Pb 1‑x S alloy thin film. The Ba 0.5 Pb 0.5 S alloy prepared by the method has a band gap width of 1.77 eV and can maintain good stability under high humidity conditions. The photoelectric detector constructed by the Ba 0.5 Pb 0.5 S alloy has an extremely low dark current and excellent photoelectric response capacity, and the band gap of the Ba x Pb 1‑x S alloy can be adjusted by adjusting the molar ratio of Ba and Pb in the Ba-Pb-S alloy.

The invention relates to the technical field of preparation of metal composite materials, in particular to a molybdenum-copper alloy production and processing technology which comprises the following steps: S1, preparation of a precursor solution and nano composite sol: dissolving a molybdenum source compound and a copper source compound in a solvent together, and adding a complexing agent to form a uniform molecular-level precursor solution; then, uniform sol containing molybdenum-copper composite nanoparticles is prepared through chemical reduction and solation treatment; s2, gelation forming: injecting the uniform sol into a mold, and curing the uniform sol into a wet gel blank; s3, drying: drying the wet gel blank body to obtain a dry gel blank body; and S4, densification: carrying out heating heat treatment on the xerogel blank in a protective or reducing atmosphere to realize final densification of the alloy. According to the preparation method, the molybdenum-copper composite nanoparticles are constructed in a liquid phase in a chemical mode from a molecular precursor solution, so that the two phases are uniformly mixed at the nanoscale, and the problem of macrosegregation of preparation by a traditional infiltration method is solved.

The invention belongs to the technical field of semiconductor nano-films, and particularly relates to a ternary metal sulfide nano-crystal film and a preparation method and application thereof. Based on a low-temperature solution process, a two-step method is innovatively adopted for in-situ preparation of the ternary metal sulfide nanocrystalline film on the substrate, short straight-chain organic amine is used as a solvent to dissolve metal salt to prepare a molecular precursor, and the porous cationic film is prepared on the substrate through the soft template effect of the organic straight-chain amine. Then, a sulfur source is dissolved in an orthogonal solvent acetone which does not damage the cation film to prepare a sulfur source precursor solution of the film, the cation film is treated by the sulfur source precursor solution for multiple times, and the ternary metal sulfide nanocrystalline film is formed through low-temperature annealing, and the prepared film shows a high-purity phase, a standard stoichiometric ratio and excellent light absorption performance; and the surface of the film has no obvious agglomeration and shows good flatness and compactness. The material is used as an absorption layer of various photoelectric devices, and has huge application potential.

A method for doping a battery cathode comprises producing a coating with a complex containing a metal-based molecular precursor, applying the coating to a battery cathode, and calcining the coating applied to the battery cathode at a calcination temperature of at least 300 °C.

The application discloses a kind of high-dispersion cobalt-based catalyst and its preparation method and application, belong to cobalt-based catalyst technical field, the present application with four carboxyl phthalocyanine cobalt and nitrogen defect carbon nanotube as raw material, through molecular self-assembly in organic solvent and form pre-assembly complex, then the pre-assembly complex is programmed microwave heating, obtain the high-dispersion cobalt-based catalyst, the present application utilizes the means that specificity molecular precursor and carrier defect engineering are combined, by liquid phase pre-assembly constructs "molecular anchor-anchor position" pre-connection system, again with the principle of programmed microwave energy precise input, successfully solve the key technical problems that existing microwave method preparation cobalt-based catalyst when metal atom is easy to gather, active site structure is uncontrollable and catalytic performance is mediocre etc..

A method for coating a metallic surface by a graphene layer by depositing a graphene molecular precursor comprising a compound having an aromatic hydrocarbon component that is derivatized by a tethering group. The tethering groups react with the metallic surface to form a covalent bond between the compound of the graphene molecular precursor and the non-metallic surface, and the graphene molecular precursor is transformed into a graphene interfacial layer which is covalently bound to the non-metallic surface.