5 results about "Carbon nanocomposite" patented technology

The present application relates to a kind of electrochemical detection method and system for capsaicin, detection method includes: providing three electrode system;Configuration electrolyte solution and dissolve capsaicin standard sample or sample to be measured;Electrochemical detection is carried out using three electrode system to obtain oxidation peak current signal;Based on the corresponding relationship between oxidation peak current and capsaicin concentration determines the capsaicin content in sample to be measured.Detection system includes three electrode system, battery module, power module, MCU module, electrochemical detection circuit, signal conditioning circuit and communication module, can realize the rapid, sensitive detection of capsaicin.The present application improves the detection sensitivity by carbon nanocomposite modified carbon cloth electrode, combined with portable hardware circuit design, get rid of the dependence on large instrument, applicable to the on-site rapid detection of capsaicin in food industry, provide scientific, objective technical means for hot degree quantification.

This invention discloses a composite catalyst, its preparation method, and its application in sludge treatment, belonging to the field of sludge treatment and environmental protection technology. The invention synthesizes an iron-carbon nanocomposite catalyst using ferric nitrate nonahydrate, antibiotic bacterial residue, and melamine as precursors. The resulting catalyst can, on the one hand, activate ammonium persulfate to generate free radicals that disrupt the water-locking structure of the sludge, enhancing its hydrophobicity and thus improving dewatering efficiency. On the other hand, the Fe species in the composite catalyst activates ammonium persulfate to form Fe... 3+ Fe 3+ The hydrolysis generates ferric hydroxide colloids that can adsorb sludge particles, neutralize surface charges, thereby reducing interparticle repulsion, promoting floc aggregation, and enhancing dewatering efficiency. The advanced oxidation process of ammonium persulfate catalyzed by iron-carbon nanocomposite catalysts also achieves the removal of antibiotic resistance genes from sludge.

Disclosed is a catalyst for hydrogen evolution reaction or hydrogen oxidation reaction, which is a catalyst that can be used under alkaline conditions and has significantly improved kinetic characteristics compared to existing commercial platinum catalysts. The present invention provides a catalyst for electrochemical hydrogen reaction under alkaline conditions and a method for preparing the same, and a ruthenium-based catalytic electrode containing the same, which can be used as an electrode for anion exchange membrane-based water electrolysis cell and fuel cell, wherein the catalyst has 2 to 20 ruthenium supported in an aggregate form on the surface of a molybdenum carbide-carbon nanocomposite carrier.

This invention relates to a method for functionalizing and passivating the carbon surface (20a) of a carbon nanocomposite material (20), said carbon nanocomposite material (20) being configured as a flexible component forming a regulating mechanism of a watch movement; the flexible component; and a regulating mechanism comprising the flexible component and a balance wheel cooperating with the flexible component; and to the use of a composite for functionalizing and passivating the carbon surface (20a) of the carbon nanocomposite material (20). The method according to the invention comprises a chemical reaction of the carbon surface (20a) with a composite comprising: - a carbon chain, which is a hydrocarbon chain or a fluorocarbon chain, and - a salt of a diazo group at the reactive carbon end of said chain or a precursor of said group, for covalently grafting said reactive carbon end onto said carbon surface (20a) and passivating said carbon surface (20a) to make it hydrophobic.

This invention belongs to the field of functional materials and electromagnetic wave absorbing materials, specifically disclosing a bimagnetic metal-carbon nanocomposite microwave absorbing material and its preparation method. Using a bimetallic Prussian blue analogue as a precursor, this invention prepares the bimagnetic metal-carbon nanocomposite microwave absorbing material through Joule heating treatment. Addressing the problems of easy agglomeration of metal particles, limited interface quantity, and complex preparation processes in existing technologies, this invention employs Joule heating technology to effectively inhibit the agglomeration and growth of metal nanoparticles at high temperatures, ensuring uniform dispersion of metal nanoparticles within a carbon matrix and forming abundant heterogeneous interfaces. The preparation method of this invention is simple, has a short cycle time, and low cost. The prepared material exhibits small metal particle size and abundant interface structures, demonstrating excellent microwave absorption performance in the 2-18 GHz frequency range, with a minimum reflection loss of -49.82 dB and an effective absorption bandwidth exceeding 7.0 GHz.