5 results about "Superoxide ions" patented technology

The invention provides a preparation method of an oxygen-etched Fe-N-C cathode oxygen reduction catalyst, which comprises the following steps: in a protective atmosphere, performing first pyrolysis on ZIF-8 to obtain a nitrogen-carbon substrate with a regular dodecahedron frame structure; the method comprises the following steps: dispersing a nitrogen-carbon substrate, superoxide and crown ether in a solvent to obtain a turbid liquid, releasing superoxide ions in the turbid liquid, forming a carbon-oxygen double bond defect by the superoxide ions and carbon atoms in the nitrogen-carbon substrate, and centrifuging the turbid liquid to obtain a composite solid; and grinding and mixing the composite solid and iron salt, performing secondary pyrolysis in a protective atmosphere, and performing acid pickling and drying to obtain the oxygen-etched Fe-N-C cathode oxygen reduction catalyst. The invention further provides the Fe-N-C cathode oxygen reduction catalyst obtained through the preparation method and application of the Fe-N-C cathode oxygen reduction catalyst.

The invention relates to the technical field of photocatalysts, in particular to a metal monatomic / polydopamine / cadmium sulfide composite material and a preparation method and application thereof. The composite material takes cadmium sulfide nanoparticles wrapped by polydopamine as a matrix and is loaded with metal single atoms. The composite material generates electron-hole pairs and is separated under the excitation of visible light, holes are distributed on a valence band of CdS, electrons are distributed on a conduction band of CdS, the electrons distributed on the conduction band of CdS are transferred to the surfaces of metal monoatoms through polydopamine, finally, photo-generated electrons are distributed on the metal monoatoms, and photo-generated holes are distributed on the valence band of CdS. When a reaction occurs, oxygen is oxidized into superoxide ions by metal single atoms, water is reduced into H < + > by holes in a CdS valence band, the H < + > is transferred to the metal surface by polydopamine, and OOH is generated by combining. O2 <-> and photo-induced electrons loaded on the metal surface with the H < + >; further combining with H < + > to generate H2O2.

This invention relates to organic functional thin films, specifically to a method for growing controllable number of layers using solvent vapor-assisted growth. p A method for preparing MSB molecular crystal thin films, and the application of these films in generating superoxide ions under light irradiation for antibacterial protection. This method addresses the limitations of existing solution drop casting epitaxy methods for preparing... p To address the problems of uncontrollable layer number, limited area, and insufficient reactive oxygen generation efficiency in MSB molecular crystal thin films, this invention utilizes toluene vapor atmospheres of varying concentrations to control the solvent evaporation rate, thereby achieving... p The few-layer, large-area, and uniform growth of MSB molecular crystal thin films allows for the regulation of molecular arrangement and electronic structure, promoting electron localization and efficient electron transfer to oxygen molecules under illumination, thus significantly improving the generation efficiency and stability of superoxide ions.

The utility model relates to the technical field of boards, and discloses a plasma antibacterial board which comprises a wood board base material, surface layer boards are arranged at the upper end and the lower end of the wood board base material, the surface layer boards are antibacterial boards processed through the plasma technology, the surface layer boards are hot-pressed on the wood board through high temperature and high pressure generated by ionized gas, and antibacterial factors are contained in the surface layer boards. After the antibacterial factors are catalyzed by high temperature and high pressure generated by ionized gas, quadruple antibacterial effective components including zinc ions, hydroxyl radicals, superoxide ions and hydrogen peroxide are formed. The antibacterial effective components can destroy the protein structure of bacteria and interfere the DNA synthesis of microorganisms, so that the efficient antibacterial effect is realized. The efficient and lasting antibacterial property is realized, and the bacterium breeding can be effectively inhibited.

The present disclosure proposes a method for preparing an oxygen-etched Fe-N-C cathode oxygen reduction catalyst, comprising: performing a first pyrolysis on ZIF-8 in a protective atmosphere to obtain a nitrogen-carbon substrate, wherein the nitrogen-carbon substrate has a regular dodecahedral framework structure; dispersing the nitrogen-carbon substrate, superoxide and crown ether in a solvent to obtain a suspension, in which the superoxide releases superoxide ions, and the superoxide ions form carbon-oxygen double bond defects with carbon atoms in the nitrogen-carbon substrate, and the suspension is centrifuged to obtain a composite solid; after grinding and mixing the composite solid with an iron salt, performing a second pyrolysis in a protective atmosphere, and after acid washing and drying, obtaining an oxygen-etched Fe-N-C cathode oxygen reduction catalyst. The present disclosure also proposes a Fe-N-C cathode oxygen reduction catalyst obtained by the above-mentioned preparation method and its application.