17 results about "Zinc peroxide" patented technology

The invention discloses antibacterial glaze paste for a ceramic false tooth and a preparation method thereof, and belongs to the technical field of antibacterial glaze paste manufacturing, the antibacterial glaze paste for the ceramic false tooth comprises: 70-95% of glaze powder matrix composed of feldspar, quartz, kaolin and calcium carbonate; the antibacterial agent is composed of zinc oxide and bismuth oxide, the molar ratio of the bismuth oxide to the zinc oxide is 5%-18%, the surfaces of particles of the antibacterial agent are coated with a plurality of silicon dioxide shell layers, the thickness of the shell layers is 3-15 nm, and the shell layers are treated through a coupling agent; the antibacterial agent can further contain a trace amount of silver or copper nanoparticles with the mass fraction of 0.01-0.3%, and through the synergistic effect of zinc oxide and bismuth oxide, limited release of multiple SiO2 shell layers and addition of a trace amount of Ag / Cu, the ceramic false tooth antibacterial glaze paste can keep efficient antibacterial ability for a long time without external illumination or special excitation conditions, the antibacterial rate is larger than or equal to 98%, and the antibacterial effect is good. The method is obviously superior to uncoated or single-step sintered contrast samples.

This application relates to the field of methane conversion catalytic materials technology, and particularly to a method for preparing a metal-nonmetal dual-site synergistic catalytic material and its application in methane conversion. The method for preparing the metal-nonmetal dual-site synergistic catalytic material includes the following steps: S1, preparation of a zinc peroxide precursor solution; S2, in-situ doping with nitrogen; S3, Au loading; S4, preparation of the metal-nonmetal dual-site synergistic catalytic material. This application addresses the problems of low methanol selectivity, insufficient methane conversion activity, and susceptibility to peroxidation in related technologies by providing a method for preparing a metal-nonmetal dual-site synergistic catalytic material and its application in methane conversion.

The invention discloses a chiral supramolecular nano assembly as well as a preparation method and application thereof, and belongs to the technical field of biomedical nano materials. The nano assembly (ZnO2 (at) CDP / Fc-DA) is constructed by taking zinc peroxide as a core, modifying a supramolecular ligand CDP through ligand exchange and combining D-alanine functionalized ferrocene guest molecules (Fc-DA) by virtue of interaction of a host and a guest. According to the assembly, the specific targeting effect of D-alanine on tumor tissues and gram-positive bacteria in tumors is utilized, Zn < 2 + > and H2O2 are decomposed and released in an acid lysosome environment of tumor cells, hydroxyl free radicals are generated under the catalysis of ferrocene, and the bacteria and the tumor cells are synchronously induced to generate ferroptosis. The microbial DNA released by bacterial ferroptosis can further activate the cGAS-STING innate immune pathway, reverse the immunosuppression microenvironment and synergistically enhance the anti-tumor immune response. According to the invention, the collaborative treatment of precise removal and immune activation of bacteria in the tumor is successfully realized, and a new effective strategy is provided for treating the breast tumor with bacteria colonization.

The invention provides a chromium-free iron-based gas phase fluorination catalyst as well as a preparation method and application thereof, and relates to the technical field of fluorine chemical industry. Based on 100 parts by mass of a carrier, the catalyst comprises 20-40 parts by mass of fluoride of iron; 5-15 parts by mass of a first auxiliary agent, wherein the first auxiliary agent comprises metal fluorides of one or more elements selected from titanium, tin and antimony; 5-10 parts by mass of a second auxiliary agent, wherein the second auxiliary agent comprises one or more of calcium peroxide, strontium peroxide, magnesium peroxide, potassium permanganate, zinc peroxide and sodium percarbonate; 1-3 parts by mass of a binder; and 100 parts by mass of a carrier. A proper amount of the specific second auxiliary agent is added into the catalyst, so that the catalyst can be decomposed at a proper temperature to release heat and generate oxygen, the oxygen can be provided through decomposition of the second auxiliary agent in the fluorination reaction process, carbon deposition on the catalyst is eliminated in situ, and the service life of the catalyst is prolonged; the catalyst is free of chromium element, non-toxic and environment-friendly; the raw materials are easily available, and the cost advantage is prominent.

The utility model relates to the field of flue gas desulfurization and purification, in particular to a zinc oxide desulfurization device for smelting flue gas, which comprises a desulfurization induced draft fan, and is characterized in that one end of the desulfurization induced draft fan is connected with a washing tower reverse spray pipe communicated with the desulfurization induced draft fan in a flange manner, and one end of the washing tower reverse spray pipe is connected with a reverse spray washing tower; according to the zinc oxide slurry desulfurization device, through a zinc oxide slurry desulfurization process, the large-caliber spray head forms a turbulent effect in the reverse spray pipe, so that SO2-containing flue gas is in reverse contact with zinc oxide desulfurization liquid, and zinc sulfite slurry is efficiently generated. Generated zinc sulfite is subjected to acid decomposition, high-concentration SO2 is released for acid making, meanwhile, zinc sulfate is electrolyzed to recover zinc resources, and efficient recycling of sulfur and zinc is achieved; a foam area is formed in a reverse spraying pipe through a large-diameter spraying head and makes full contact with high-temperature flue gas, and the fluid mechanics principle and the aerodynamics principle are ingeniously combined.

The application belongs to the technical field of rubber auxiliaries, and specifically provides a composite anti-reversion agent for vulcanization and a preparation method thereof. The composite anti-reversion agent for vulcanization comprises thiosulfate, bismaleimide, organic sulfur stabilizer, polyethylene wax, stearic acid, fatty acid ester, zinc stearate, antioxidant and pentaerythritol stearate. The preparation method of the composite anti-reversion agent for vulcanization is as follows: after high-speed blending of the components, melt extrusion and granulation are performed. The composite anti-reversion agent for vulcanization can form short sulfur bonds or carbon-carbon bonds with good thermal stability, thereby greatly inhibiting the reversion of vulcanization. The bismaleimide is modified by a furan derivative, thereby further improving the anti-reversion effect of vulcanization. The thiosulfate is treated by zinc oxide, thereby further improving the anti-reversion effect of vulcanization.

The invention discloses a zinc oxide concentrate separation process based on high-mud type mixed lead-zinc ore, and belongs to the technical field of zinc oxide flotation, the zinc oxide concentrate separation process based on the high-mud type mixed lead-zinc ore comprises the following steps: 1, grinding the mixed lead-zinc ore into particles; 2, roughing: adding a roughing agent, and mixing and stirring; 3, fine selection: adding a fine selection agent, and mixing and stirring; aiming at the characteristics of ore pulp argillization and flotation environment deterioration caused by easy over-crushing of zinc oxide ore in a carbonate mineral form in the high-mud type mixed lead-zinc ore, primary enrichment of the zinc oxide ore is realized and secondary slime is reduced while the zinc oxide ore is selectively levigated and micro-fine-particle fine slime is discharged in time by utilizing multiple ore grinding and grading and by selectively grinding the zinc oxide ore and timely discharging the micro-fine-particle fine slime; and the covering phenomenon is reduced, and the interference of the zinc oxide fine silt on the flotation process of the lead-zinc sulfide ore is reduced.

The application provides an activator for a rubber vulcanization reaction and a preparation method and application thereof, and belongs to the technical field of catalysts. The activator for the rubber vulcanization reaction comprises a carrier and zinc oxide. The carrier is a nanomaterial doped with a nonmetallic element. The zinc oxide is anchored to the outer surface of the carrier. The zinc oxide is coordinated with the nonmetallic element doped on the outer surface of the carrier to form a monatomic layer in the form of fully exposed sub-nanoclusters. The zinc atoms are not overlapped and are anchored to the outer surface of the carrier in the form of dispersed fully exposed sub-nanoclusters by coordination of the zinc oxide and the nonmetallic element doped on the outer surface of the carrier, so that the zinc atoms can be fully exposed to serve as active centers and improve catalytic activity. The activator can be applied to the vulcanization reaction in the rubber field, improves the vulcanization reaction efficiency, and can reduce the zinc consumption by 70-80% due to the full exposure of the zinc atoms, thereby saving industrial energy consumption and metal resources.

The invention relates to the technical field of fireproof materials, in particular to a lightweight fireproof filler produced from expanded perlite and a preparation method of the lightweight fireproof filler. 5 to 25 parts of polyvinyl alcohol; 0.5 to 10 parts of MXenes (MXenes); 1-10 parts of zinc oxide; 0.5 to 3 parts of a silane coupling agent; and 1-5 parts of composite modified layered double hydroxide. Zinc oxide catalyzes cross-linking carbonization of polyvinyl alcohol, composite modified layered double hydroxide releases flame-retardant components and participates in carbon layer enhancement, MXenes constructs a ceramic-carbon physical barrier, and gas-phase slow-release flame retardance and efficient fire retardance are synergistically achieved; and meanwhile, by virtue of a nanometer enhancement mechanism of MXenes and an interface modification effect of the silane coupling agent and metakaolin, the mechanical strength and the water resistance of the material are improved, and the problems of large weight increment, poor flexibility, limited improvement of high-temperature fireproof performance and the like of the modified expanded perlite in the prior art are solved.

The invention discloses a p-nitrochlorobenzene production wastewater treatment process, and relates to the technical field of wastewater treatment, the p-nitrochlorobenzene production wastewater treatment process comprises the following steps: S1, filtering p-nitrochlorobenzene production wastewater, and removing suspended solid particles to obtain a preliminary purification liquid; s2, adjusting the pH value of the primary purified liquid to 5-6 in an adjusting tank, then adding a humus / montmorillonite / zinc oxide composite material and persulfate, carrying out ultraviolet irradiation, and stirring for 1-2 hours to obtain oxidized wastewater; and S3, carrying out solid-liquid separation on the oxidized wastewater, and discharging the separated liquid after the separated liquid reaches the qualified standard. By using the humus / montmorillonite / zinc oxide composite material, not only can p-nitrochlorobenzene molecules be specifically adsorbed and enriched, but also p-nitrochlorobenzene can be degraded under the action of zinc oxide and persulfate, so that the degradation rate and the total treatment efficiency are remarkably improved.

The present disclosure relates to a filtration system for an air purification apparatus for removing volatile organic sulfur compounds (VOSCs) from indoor air at room temperature, comprising a filter element comprising particles and / or pellets made from two zinc compounds, zinc hydroxide (Zn (OH) 2) and zinc peroxide (ZnO2), and wherein the filter acts as an absorption filter that irreversibly reacts with volatile organic sulfur compounds that may contaminate the indoor air, the volatile organosulfur compounds include vapors of liquid organic mercaptans (RSH), vapors of liquid dialkyl oligosulfides (RS-SR and RS-S-SR, including those present in allium species), and vapors of solvent carbon disulfide (CS2). The present disclosure also relates to a method of removing these volatile organosulfur compounds from indoor air in which a controlled indoor air flow is passed through a filtration system comprising particles or pellets prepared from zinc hydroxide (Zn (OH) 2) and zinc peroxide (ZnO2), and wherein the volatile organosulfur compound reacts irreversibly with the hydroxide and peroxide ions of the aggregate (pellets or granules) to produce solid harmless zinc salts to be trapped in the filtration system.

The invention discloses a multi-spectrum camouflage net with an electromagnetic wave-absorbing function and a preparation method thereof, and relates to the technical field of camouflage nets, a skeleton net is taken and placed in a coating, dipping and curing are carried out, and a cured skeleton net is obtained; the camouflage net is obtained by taking nylon oxford cloth, spraying camouflage paint, fixing the nylon oxford cloth on the supporting bottom net, installing the curing framework net under the supporting bottom net and assembling. The preparation method comprises the following steps: by taking ferric oxide as a raw material, zinc acetate dihydrate as a zinc source and iron nitrate nonahydrate as an iron source, forming a precursor fiber through electrostatic spinning, and due to difference of crystal structures and surface energy of ferric oxide and zinc oxide, performing phase separation in a heat treatment process, and preferentially nucleating zinc oxide to obtain a core-shell structure nanofiber; the core-shell structure nanofiber performs dielectric material-magnetic material synergistic regulation and control of electromagnetic wave absorption through zinc oxide-ferric oxide, and is beneficial to broadband absorption; multiple reflection and scattering are introduced into the core-shell structure, the electromagnetic wave propagation path is prolonged, and the wave absorbing performance of the camouflage net is improved.

The present invention relates to an ultraviolet-blocking cosmetic composition, wherein the cosmetic composition contains zinc oxide stabilized in a formulation through a zinc oxide dispersion, and thus exhibits excellent formulation stability and adhesion, low white turbidity, and superior ultraviolet-blocking performance. Specifically, the present invention relates to an ultraviolet-blocking cosmetic composition, wherein the cosmetic composition exhibits low white turbidity and exerts high ultraviolet-blocking ability by optimizing a dispersion containing ultra-high-content zinc oxide particles through mixing with an emulsifier and a dispersant.

The invention discloses an iron / copper-zinc peroxide nano-enzyme with hydrogen peroxide self-supply and double-enzyme activity, a preparation method and application, and belongs to the field of nano-enzyme preparation, the preparation method specifically comprises the following steps: dissolving a cupric salt to obtain a mother solution; the preparation method comprises the following steps: dispersing ZnO2 and ferrous salt to obtain a mixed solution; the mother liquor and the mixed liquor are evenly dispersed, the mass ratio of the bivalent copper salt to the ZnO2 to the bivalent iron salt is (6-8): (8-12): (2-3), then the obtained sediment is washed and dried, and the iron / copper-zinc peroxide nano-enzyme with the self-supply hydrogen peroxide and double-enzyme activity is obtained. The catalyst can be used as a donor of hydrogen peroxide to continuously catalyze to generate ROS; by utilizing high-frequency ultrasonic treatment of ultrasonic waves, the hydrogen peroxide self-supply capacity, peroxidase-like activity and glutathione-like activity of the Fe / Cu-ZnO2 nano-enzyme are enhanced, a large amount of ROS (reactive oxygen species) is explosively generated, and intractable bacterial infection is efficiently treated.

The invention relates to the technical field of desulfurization synergists, in particular to a desulfurization synergist for a power plant and a preparation method of the desulfurization synergist. The zinc oxide, the citric acid and the beta-cyclodextrin-citric acid / zinc peroxide composite material are compounded for use. Wherein the beta-cyclodextrin-citric acid / zinc peroxide composite material does not simply replace zinc oxide and forms a synergistic enhanced network with zinc oxide / citric acid through a triple mechanism of slow release of active oxygen, molecular inclusion and interface complexation, and the optimal proportion is achieved when 10 parts of dosage is used, so that the desulfurization rate is increased to 96% or above from 88% of a traditional formula, the dosage window is wide, the cost is low, and the application range is wide. And a novel solid oxidation enhancer which is efficient, safe and easy to apply on a large scale is provided for a wet desulfurization process.

High-dispersed platinum loaded oxygen-deficient zinc oxide photocatalyst, preparation method and application thereof in photocatalytic preparation of propylene from propane dehydrogenation belong to the field of photocatalysis technology. A zinc salt solution is stirred under alkaline condition to generate white precipitate, which is then added into hydrogen peroxide and stirred in oil bath, and dried to obtain zinc peroxide powder; the zinc peroxide powder is ground and calcined at high temperature to obtain an oxygen-deficient zinc oxide carrier, which is then immersed in a platinum precursor solution, dried and calcined at high temperature to obtain the photocatalyst. The photocatalyst takes oxygen-deficient zinc oxide as carrier and trace amount of noble metal platinum as active component, wherein the mass percentage of the noble metal platinum is 0.2% to 1.0%. The catalyst exhibits high reaction activity far beyond the thermodynamic limit under low temperature and visible light irradiation, and the selectivity of propylene can reach more than 99%, the catalyst has good stability, and no obvious deactivation is observed after 100 hours of continuous work, the catalyst has high carbon deposition resistance and high noble metal atom utilization rate.