9 results about "Silver phosphate" patented technology

The application discloses a method for constructing a cycloalkene-quinolinone axial chiral compound through a Heck reaction. The method uses a quinolinone compound containing central chirality as a substrate, uses palladium acetate (Pd(OAc)2) and 4,5-bisdiphenylphosphine-9,9-dimethylxanthene (Xantphos) as a catalyst, uses silver phosphate (Ag3PO4) as an alkali, and uses toluene as a solvent to prepare a cycloalkene-quinolinone axial chiral compound. The compound can be reacted with diisobutylaluminum hydride to realize conversion of a functional group. The method has mild reaction conditions, raw materials are easy to obtain, the product has excellent enantioselectivity, and has excellent yield, and thus provides a new method for synthesizing a cycloalkene-quinolinone axial chiral compound.

The invention discloses a g-C3N4 / Ag3PO4 / AgCl composite photocatalyst as well as a preparation method and application of the g-C3N4 / Ag3PO4 / AgCl composite photocatalyst. The g-C3N4 is gradually compounded with silver phosphate and silver chloride and then added into a polyacrylonitrile spinning solution, and the nanofiber membrane is prepared through electrostatic spinning. After the g-C3N4 is gradually compounded with silver phosphate and silver chloride, separation of photon-generated carriers is facilitated, and reduction of silver ions by photo-generated electrons is reduced, so that the degradation efficiency of the photocatalyst is improved, and the light corrosion resistance is improved. Meanwhile, the photocatalyst is fixed in the prepared nanofiber membrane, so that the photocatalyst can be stable for a long time in the wastewater treatment process and can be recycled for multiple times, and the treatment cost is reduced, and therefore, the nanofiber membrane fixed g-C3N4 / Ag3PO4 / AgCl composite material can be used for efficiently treating dye wastewater.

Table linen (6), in particular disposable table linen and / or textile table linen, wherein the table linen (6) is soaked and / or impregnated with an active ingredient, wherein this active ingredient has an antiviral and / or antibacterial effect, wherein the active ingredient is an antiviral active ingredient with a biocide, in particular silver chloride and / or a chemically activated saline solution and / or a silver phosphate glass and / or a chemical-free solution at the molecular level, wherein positively charged ions are used which, upon contact, damage and / or destroy the negatively charged viral, microbial cells, and / or is silver chloride and / or titanium dioxide.and / or wherein the active ingredient has an antibacterial effect to prevent body odor and / or wherein the active ingredient prevents infection of healthy human cells by harmful viruses and / or wherein the active ingredient works with a silver and vesicle technology and / or wherein the active ingredient has positively charged nanofibers and / or wherein the active ingredient is based on a sustainable, biological, non-chemical basis and / or wherein the active ingredient is based on a specially modified water-based polymer emulsion based on special polymer mixtures, the basis of which is physical and / or mechanical in nature and / or wherein the active ingredient exhibits strong antimicrobial properties after curing,which are solely attributable to hydrophobic interactions of the cured polymer emulsion with the cell membrane of microorganisms and / or wherein this antimicrobial effect is purely physical and / or mechanical in nature and is not attributable to chemical or ionic interactions and / or wherein the polymer emulsion results in a polymer coating and / or wherein the chemical and physical properties of the polymer coating are modeled on the natural structure of microorganisms and / or wherein the active ingredient is free of biocides and nanoparticles.

The invention discloses a potassium-doped carbon nitride and silver phosphate heterojunction photocatalytic material as well as preparation and application thereof. The material comprises nano-sheet potassium-doped carbon nitride and silver phosphate particles deposited on a potassium-doped carbon nitride sheet layer, and the potassium-doped carbon nitride and the silver phosphate particles form a heterojunction structure. The preparation method comprises the following steps: calcining a mixed solid of organic amine and a potassium source to obtain potassium-doped carbon nitride; dispersing potassium-doped carbon nitride in water to obtain a first suspension, adding an Ag < + > solution into the first suspension to obtain a second suspension, adding a phosphate solution into the second suspension, and reacting to obtain a first product; and centrifuging the first product to obtain a precipitate, washing and drying to obtain the K-C3N4 / Ag3PO4 heterojunction material. The photocatalytic oxidation desulfurization conversion rate of the material can reach 90% or above, and the material has excellent oxidative degradation capacity on sulfides such as DBT which are difficult to remove through traditional hydrodesulfurization and can meet the strict standard of deep desulfurization of fuel oil.

The invention is suitable for the technical field of textile finishing, and provides a silver phosphate colloid, a preparation method thereof and an application of the silver phosphate colloid in textile finishing. The silver phosphate (Ag3PO4) colloid with higher stability is prepared in a high-concentration reaction system by using sodium dodecyl benzene sulfonate (SDBS) as a surfactant, the colloid is stable and does not precipitate in 96 hours, the yield per unit volume is increased, additional auxiliary reagents are not needed in preparation, and the preparation process is simplified. The Ag3PO4 colloid is used as a functional finishing agent for finishing the cotton fabric, and the obtained photocatalytic self-cleaning functional fabric is controllable in loading capacity, excellent in performance in the aspect of visible light catalytic degradation of organic pollutants such as reactive red 195 and wide in application. According to the method, the problem that Ag3PO4 colloid in a high-concentration system is easy to precipitate is solved, photocatalytic and self-cleaning multifunctional finishing of the cotton fabric is realized, and a feasible solution is provided for large-scale production of environment-friendly multifunctional textiles.

The invention provides a preparation method of a magnetic biochar / silver phosphate composite material, which comprises the following steps: step S1, biomass template pretreatment: selecting biomass as a template, cleaning in at least one of an acid solution, an alkali solution and a buffer solution, and performing low-temperature freezing and slicing to obtain the biomass template; step S2, preparing magnetic biochar: preparing the biomass template prepared in the step S1 by a one-pot method to obtain the magnetic biochar; and S3, preparing the magnetic biochar / silver phosphate composite material: performing surface modification on the magnetic biochar prepared in the step S2 by adopting a modifier containing an organic anion group, and performing induced precipitation on the magnetic biochar subjected to surface modification to obtain the magnetic biochar / silver phosphate composite material. The magnetic charcoal / silver phosphate composite material provided by the embodiment of the invention is high in photocatalytic activity, good in stability, easy to recover, good in circularity, low in cost and green in process.

The invention discloses a preparation method and application of self-supporting supported silver nanoparticles, and relates to the technical field of electrocatalysis, and the preparation method comprises the following steps: adopting a three-electrode system, taking a silver foil or a silver net as a working electrode, and taking an Ag / AgCl electrode as a reference electrode; a carbon rod serves as a counter electrode; performing pretreatment on the silver foil or the silver net in a phosphoric acid buffer solution; performing reduction treatment on an oxide layer on the surface of the silver foil or the silver net through an electrochemical in-situ reduction method; forming a uniform silver phosphate thin layer on the surface of the silver foil or the silver net by using an electrochemical in-situ oxidation method and setting a constant potential for several seconds; after the step S3 is carried out, negative potential is applied to the solution, and the self-supporting supported silver nanoparticles are prepared. According to the Ag NPs / Ag3PO4 prepared by the invention, the yield of preparing DHMF by hydrogenating HMF is 0.679 mmol cm <-2 > h <-1 >, and the selectivity and the Faraday efficiency are respectively improved to 94.59% and 95.06%. In a paired coupling system, the total Faraday efficiency reaches up to 185.5%.

The application provides a high-efficiency near-infrared response photocatalytic composite crystal and a preparation method and application thereof, and belongs to the technical field of preparation of non-conventional semiconductor crystals. The application fuses up-conversion nanoparticles NaYF4:Yb,Tm and MOF through a one-step method to obtain up-conversion functionalized MOF nanocomposites, and then prepares multifunctional MOF nanocomposites through an amidation reaction and reversible addition-fragmentation chain transfer polymerization. Finally, the composite nanoparticles are fused with silver phosphate crystals through a biomimetic synthesis strategy to obtain multifunctional ternary composite silver phosphate crystals. The method solves the problems of the limitation of the absorption wavelength range of silver phosphate and photo-corrosion. The photocatalytic composite crystal can effectively degrade rhodamine B under near-infrared light, and has excellent cycle stability while maintaining leading near-infrared photocatalytic activity.

This invention discloses a low-temperature, high-speed blow molding method for polylactic acid (PLA) drainage bags, relating to the field of polymer materials technology. The method first involves blending PLA with plasticizers and lubricants, melting and granulating the mixture at a specific low-temperature window, and then blow molding it to obtain a substrate. Subsequently, the substrate is pretreated with a silver ion solution and then subjected to in-situ oxidative polymerization with a dispersion containing functionalized pyrrole derivative monomers and silver phosphate microcapsules loaded with perfluorinated monomers, constructing a composite functional coating on the substrate surface. This invention effectively inhibits the thermal degradation of PLA by strictly controlling the low-temperature process parameters of blow molding, ensuring the safety of the substrate; simultaneously, by embedding microcapsules into the coating through in-situ polymerization, it achieves a synergistic effect of antibacterial and hydrophobic functions.