3results about How to "Optimize the process route" patented technology

This invention relates to the field of membrane technology, specifically to a nitrogen-doped carbon nanofiber catalytic membrane loaded with monatomic iron, its preparation method, and its application. It includes the following steps: (1) dissolving polyacrylonitrile and ferric chloride hexahydrate in a solvent to obtain an electrospinning precursor solution; (2) electrospinning the electrospinning precursor solution to obtain a precursor fiber membrane; (3) calcining the precursor fiber membrane under a protective atmosphere to obtain a nitrogen-doped carbon nanofiber catalytic membrane loaded with monatomic iron. The nitrogen-doped carbon nanofiber catalytic membrane loaded with monatomic iron prepared by this invention achieves near-complete utilization of metal atoms in advanced oxidation processes, significantly improving pollutant degradation activity and reaction kinetics; this material also possesses excellent structural stability and recyclability, providing a new design concept and technical path for developing efficient and scalable water treatment catalytic materials.

The invention relates to the field of solid waste resource utilization, in particular to a coal-based solid waste treatment and high-value utilization method. The coal-based solid waste treatment and high-value utilization method comprises the following steps: carrying out thermal oxidation on lignite to obtain oxidized lignite; mixing the oxidized lignite with a chemical activator dispersion liquid, and carrying out a solvothermal reaction to obtain a turbid liquid; carrying out solid-liquid separation on the turbid liquid to obtain filter residues and filtrate; calcining the filter residues to obtain a medium element compound fertilizer; and adding an acidic solution into the filtrate to adjust the pH to be acidic, thereby obtaining the humic acid. According to the method, the humic acid is prepared, meanwhile, the medium element compound fertilizer is prepared from the residues, the process route is improved, the economic benefit is greatly improved, and high additional value and multi-path resource utilization of the lignite solid waste are achieved.

This invention belongs to the field of electromagnetic wave absorbing materials technology, specifically relating to a nickel-boron-doped cobalt-based layered carbon absorbing material and its preparation method. This invention utilizes a cobalt-based boron imidazole precursor framework as a template, and forms a two-dimensional layered layered double hydroxide (LDH) through a chemical oxidation etching process using nickel ions. This LDH is then subjected to high-temperature reduction to obtain the nickel-boron-doped cobalt-based layered carbon material. This material leverages the unique properties of two-dimensional materials to achieve high impedance matching, allowing electromagnetic waves to enter the absorber at a significant rate. Furthermore, the material's excellent dielectric polarization and magnetic coupling attenuate the electromagnetic waves entering the absorber. The material achieves a minimum reflection loss of -60.1 dB and a maximum effective absorption bandwidth of 6.24 GHz, giving it excellent electromagnetic wave absorption capabilities. The preparation method of this invention is simple and easy to mass-produce.