33 results about "Cu nanoparticles" patented technology

This invention discloses a La-doped ZnFe-LDHs catalyst for stabilizing Cu nanoparticles, its preparation method, and its application in the hydrogenation of furfural to furfuryl alcohol. It belongs to the technical field of catalytic material preparation and high-value utilization of biomass resources. The catalyst uses ZnFe-LDHs as a support, Cu as the active component, and La as a modifier to prepare a catalyst with the composition La-Cu / ZnFe-LDHs. The La modifier is partially doped into the ZnFe-LDHs layers and partially distributed on the support surface as La2O2(CO3) nanoparticles. This invention achieves multi-scale stabilization of Cu nanoparticles through La doping in the ZnFe-LDHs layers and the formation of the surface La2O2(CO3) nanophase. La regulates the electronic structure of the layers, keeping Cu in a low valence state through charge redistribution, while simultaneously improving the catalyst's resistance to sintering; the surface La2O2(CO3) inhibits Cu migration through structural anchoring. The catalyst maintained a high conversion rate of 93.5% after seven cycles in the hydrogenation of furfural to furfuryl alcohol, with a Cu loading as low as 4.74 wt%, significantly improving the stability of the Cu-based catalyst.

The invention belongs to the technical field of electro-catalysis, and particularly discloses a Cu nanoparticle / acidified carbon nanotube catalyst and a preparation method and application thereof.According to the preparation method, acidified pretreated carbon nanotubes with good conductivity and high specific surface area are selected as a substrate, CuO nanoparticles are evenly loaded through a hydrothermal method, and the Cu nanoparticle / acidified carbon nanotube catalyst is obtained; and growing a zeolite imidazate framework material-8 (ZIF-8) on the surface of the CuO nanoparticle-loaded carbon nanotube in situ, and regulating the thickness of an ultrathin nitrogen-carbon layer on the surface and coordination of Cu-N by regulating the calcining temperature and time. According to the Cu nanoparticle / acidified carbon nanotube catalyst as well as the preparation method and the application thereof, the Cu nanoparticles are encapsulated in a confined manner, so that long-service-life electrically-driven CO2 is converted into a high-added-value C2 + product, catalytic active sites of the Cu nanoparticles are fully exposed, the charge transfer rate is increased, and the intrinsic activity of the Cu active sites is improved.

The invention provides a titanium dioxide-copper core-shell catalyst, a preparation method and application of the catalyst in methanol synthesis, and the preparation method comprises the following steps: dispersing TiO2 nanoparticles in deionized water, adding a copper salt solution and a reducing agent into an obtained dispersion system, reducing Cu < 2 + > in the dispersion system into Cu nanoparticles in a protective atmosphere at the temperature of 40-60 DEG C, and carrying out vacuum drying to obtain the titanium dioxide-copper core-shell catalyst. Depositing on the outer surfaces of the TiO2 nanoparticles, and drying to obtain a catalyst precursor; and calcining the catalyst precursor at the temperature of 300-450 DEG C for 1-4 hours to form the titanium dioxide-copper core-shell catalyst. The TiO2 core in the catalyst can effectively isolate and stabilize the Cu nanoparticles, improve the anti-sintering ability of the Cu nanoparticles, reduce the side reaction of carbon deposition and prolong the service life of the catalyst. Under the illumination condition, photo-induced electrons of TiO2 and the plasma effect of Cu have a synergistic effect, the reaction temperature can be reduced, the methanol yield can be increased, and efficient photo-thermal synergistic catalysis is achieved.

The invention relates to the technical field of special glass, and discloses special protective glass and a preparation method thereof.The special protective glass comprises a glass substrate and a self-healing coating coated on the surface of the glass substrate; the glass substrate consists of oxides of the following elements: a silicon source, an aluminum source, a lithium source, a sodium source, a magnesium source, a zirconium source, a phosphorus source, a titanium source, a cerium source and a tin source; the self-healing coating comprises an organosiloxane film forming component, a crosslinking component, a silane anchoring component and nanoparticles; the cross-linking component comprises a boric acid ester bond cross-linking structure and a disulfide bond cross-linking structure; the silane anchoring component comprises at least one molecule with a trialkoxy silicon group at the tail end, and the self-healing coating is combined with a silanol group on the surface of the glass substrate through a silicon-oxygen bond to form an interface covalent binding layer. According to the invention, the glass can be effectively repaired after cracks appear, so that not only is the optical performance ensured, but also the mechanical strength of the glass is enhanced.

The invention is applicable to the technical field of nano material preparation, and provides a preparation method and application of a Mn < 2 + >-MoS2-Ag surface enhanced Raman spectrum substrate, the method comprises the following steps: synthesizing a Mn < 2 + >-doped MoS2 nano material through a hydrothermal method, and loading Ag nano particles on the surface of the Mn < 2 + >-doped MoS2 nano material by using an ultrasonic-assisted chemical reduction method to obtain the Mn < 2 + >-MoS2-Ag surface enhanced Raman spectrum substrate. The substrate combines a chemical enhancement effect brought by Mn < 2 + > doping and an electromagnetic enhancement effect provided by Ag nanoparticles to form a synergistic enhancement system. When being applied to SERS (Surface Enhanced Raman Scattering) detection of trace ofloxacin in a water environment, the sensor shows excellent sensitivity and specificity, and the detection limit can reach 10 <-11 > M. The method is simple in preparation process and mild in condition, the prepared substrate is good in stability and remarkable in enhancement effect, and an effective tool is provided for rapid and high-sensitivity detection of antibiotic pollutants in the environment.

Provided is a photoresponsive material characterized by comprising nanoparticles having a perovskite-type crystal structure containing iodine at a site, and a shell-shaped ligand having a betaine group and partially coordinated to the nanoparticles, wherein the substance amount ratio of the iodine present at a site X on the surface of the nanoparticles is lower than the substance amount ratio of the iodine present at a site X inside the nanoparticles.

The present application relates to the field of catalytic materials for atmospheric pollutant control and discloses a pulse current-enhanced MOF-based catalyst, a preparation method therefor and a use thereof. In the present application, the method comprises: dissolving a copper salt and polyvinylpyrrolidone in a mixed solution of DMF and ethanol, and then adding formic acid; dissolving Cu-TCPP in the mixed solution of DMF and ethanol; then mixing the solutions obtained in the steps above until the solutions are uniformly dispersed, and heating and drying the mixture to obtain PML-Cu; weighing PML-Cu and calcining same in an inert gas to obtain PML-CuNPs; and using a pulse current to treat the PML-CuNPs to obtain Pulse-PML-CuNPs. In the present method, an active center is generated in situ in a two-dimensional MOF-based material Cu-TCPP by means of a node metal in-situ reduction method, and a synthesized two-dimensional MOF-based electrocatalyst PML-CuNPs has a single atomic layer structure and can maximize mass transfer rate. By means of the pulse current method, the present application further changes the surface state of the active center, and changes the surface roughness and valence state of Cu nanoparticles, thereby enhancing the reaction efficiency of electroreduction of CO2 into a multi-carbon product.

The invention discloses high-refractive-index glue based on amino zirconium-based metal organic polyhedral dispersed zirconium dioxide, a glue film and a preparation method. The high-refractive-index glue is prepared from the following raw material components in parts by weight: 100 parts of acrylate copolymer, 0.05 to 0.25 part of thermal curing agent, 0.2 to 2 parts of photoinitiator, 0.3 to 2.5 parts of photo-crosslinking agent and 10 to 30 parts of Zr-MOPs / ZrO2 dispersion liquid. In the Zr-MOPs / ZrO2 dispersion liquid, through an amino-containing zirconium-based metal organic polyhedron (Zr-MOP) in-situ anchoring technology, by utilizing strong chemical bonding between amino and the surfaces of nanoparticles and a steric hindrance effect of a Zr-MOP skeleton, uniform dispersion and long-acting stability of the nanoparticles are realized by a one-step method; meanwhile, the ultraviolet aging resistance of the glue can be improved through the free radical capturing capacity of the Zr-MOP ligand, a complex modification process or toxic additives are not needed, and an efficient and low-cost solution is provided for industrial application of the high-refractive-index glue.

The application relates to the field of PVC films and discloses a high-transparency PVC film which is a multilayer composite structure and sequentially comprises, from the outside to the inside, a smart self-cleaning hydrophobic layer, a double self-repairing gradient hardness layer, a dual-fluorescent ultraviolet full-spectrum management layer, a refractive index gradient matching transparent layer, a topological network locking core layer, a magnetic field oriented nano-barrier layer and a multiple-response reversible bonding layer. The application also discloses a preparation method of the high-transparency PVC film, which comprises the preparation of functional additives and nanoparticles, the preparation of slurry / parent particles of each layer, the step-by-step gradient mixing process of the topological network locking core layer parent particles, magnetic field assisted multilayer co-extrusion and interface in-situ reaction, gradient coating and double curing, step-by-step calendering-quenching and setting, online ultraviolet irradiation treatment, multiple-response back coating treatment, heat setting and stress elimination, online multi-spectrum quality detection, the realization of the whole life cycle performance management from the surface to the body and from use to recycling and the breakthrough of the limitation of single function or simple layering of the prior art.

The invention discloses a production process of a new material for paper decoration, and relates to the technical field of decoration material production, the dependence on natural mineral products is abandoned, renewable plant fiber paper is adopted as a core base material, the radioactive risk of a raw material source is eliminated, and the environmental safety of long-term indoor use of the material is ensured; in order to solve the problems that paper is insufficient in strength and poor in weather resistance, a composite modifier containing waterborne polyurethane resin and nano silicon dioxide is designed, the modifier fully permeates into the interior and gaps of a paper fiber network through an ultrasonic-assisted impregnation technology, and in the subsequent drying and hot pressing process, the strength of the paper is greatly improved. The resin is crosslinked and has a synergistic effect with the nanoparticles, a compact organic-inorganic hybrid protection layer is formed on the surfaces of the fibers and among the fibers, and the protection layer obviously enhances the mechanical strength, wear resistance and moisture resistance of the paper, so that the paper meets the use requirements of decorative plane materials, and meanwhile, unification of safety and economical efficiency is realized.

The invention discloses a bifunctional catalytic material with electro-catalysis and photo-thermal conversion performance, and particularly relates to the technical field of electro-catalysis and photo-thermal catalysis, and the bifunctional catalytic material is oxygen-doped carbon layer packaged Cu nanoparticles (Cu (at) O-C). Meanwhile, the invention further provides a preparation method of the bifunctional catalytic material and application of the bifunctional catalytic material to ammonia production through electro-catalysis nitrate reduction and ammonia water production through photo-thermal evaporation. The carbon layer can enhance adsorption / activation of nitrate radicals and can enhance the surface local photothermal effect at the same time. The Cu-coated O-C bifunctional catalytic material obtained by the invention shows high ammonia production efficiency and photo-thermal evaporation ammonia separation efficiency.

The invention provides antibody functionalized Au and Raman signal molecule and Au nanoparticles, a sandwich structure formed by combining magnetic beads and nanoparticles and application of the sandwich structure, and belongs to the technical field of myocarditis related index detection. A Raman signal molecule is introduced into the surface of a gold nanoparticle, a gold shell layer is deposited, the surface of the gold shell layer is modified with an antibody, and the antibody functionalized Au and Raman signal molecule and Au nanoparticle is constructed. According to the invention, the silver-coated gold nanoparticles are prepared, silver on the outer layers of the silver-coated gold nanoparticles can be etched while the silver-coated gold nanoparticles and a second part of HAuCl4 are subjected to reduction reaction to coat a gold shell layer, and a nano cavity with extremely strong hot spots is formed between an inner-layer nano gold core and an outer-layer gold shell, so that amplification can be realized, and repeatable Raman signal reading can be realized; and accurate detection is promoted. The sandwich structure formed by further combining the magnetic beads and the nanoparticles can accurately and quickly realize Raman spectrum identification of five positive and negative samples of myocarditis.

The application provides a catalyst for carbon dioxide electro-reduction to ethylene and a preparation method and application thereof, adopts a multi-step self-assembly strategy, gradually constructs an Ag-N-C carrier structure and regulates spatial distribution of Cu nanoparticles and Pd monomers, realizes synergic construction of Ag monomer atom sites, Cu active sites and Pd monomer atom regulating sites, and thus forms a Pd1Cu / Ag-N-C catalytic system with multi-site division and electronic complementary effect. The catalyst shows significantly improved catalytic activity, selectivity and running stability in the process of carbon dioxide electro-reduction to ethylene. The preparation route is clear, operability is strong, component regulation is accurate, is suitable for various carbon-based carrier systems, and has good potential for large-scale preparation and application prospect in industrialization.

The invention discloses a high-hardness and high-toughness polarized light composite film as well as a preparation method, a production system and application thereof, and belongs to the technical field of polarized light composite films. The preparation method comprises the following steps: preparing a mixed coating liquid of organic / inorganic hybrid resin and nano particles, wherein the particle size of the nano particles is 20-50nm, and the content of the nano particles is 3-8%; two surfaces of the substrate layer are synchronously coated to form a symmetrical coating structure, and the thickness difference is controlled within + / -1 [mu] m; a sectional type UV curing process is adopted; dynamically adjusting process parameters according to environmental conditions; and the upper surface is coated with an anti-fingerprint / anti-dazzle functional coating. The prepared high-hardness and high-toughness polarized light composite film has the advantages of high hardness and high toughness. The production system comprises a double-sided synchronous coating device, an intelligent UV curing system, an online quality detection unit and a central control unit. The high-hardness and high-toughness polarized light composite film has a wide application prospect on a touch display screen.

The application discloses a kind of polypropylene microcellular foaming material with high beta crystal content and a preparation method thereof.The nano calcium carbonate or partially organicized nano calcium-based montmorillonite is mixed with pimelic acid to obtain nano-particle loaded calcium pimelate, then polypropylene resin and nano-particle loaded calcium pimelate are mixed, extruded, granulated, and molded to obtain a sample to be foamed, the sample to be foamed is sealed in an autoclave, and a two-step temperature control foaming is used to obtain a polypropylene microcellular foaming material with high beta crystal content.The polypropylene microcellular foaming material prepared by the method has stable cell quality and a beta crystal content of more than 50%.

The invention discloses a Cu-metal oxide photo-thermal catalyst regulated and controlled through rare earth doping and a preparation method of the Cu-metal oxide photo-thermal catalyst. The catalyst belongs to the field of photo-thermal CO2 hydrogenation catalysts. The preparation method comprises the following steps: uniformly dispersing MaOb in water, dropwise adding rare earth nitrate and a Cu (NO3) 2.3 H2O solution while stirring, continuously stirring after dropwise adding, drying by distillation, grinding into powder, uniformly paving, calcining in an air atmosphere, grinding again, uniformly paving, and reducing in hydrogen-argon mixed gas to obtain the catalyst. Compared with a pure Cu-loaded metal oxide material, the catalyst provided by the invention has stronger light absorption capacity, can more efficiently convert photo-thermal energy into chemical energy, and improves the photo-thermal catalytic CO2 hydrogenation yield. In the aspect of the material structure in comprehensive application, the doped rare earth effectively reduces the dispersion condition of Cu, inhibits the sintering of Cu nanoparticles, and enables the catalyst to stably maintain the activity.

This invention discloses the preparation of copper-based nanomaterials for uranium separation and their application in electrochemical uranium extraction. The method includes: preparing a copper chloride solution and a sodium borohydride solution using chilled deionized water; rapidly adding the copper chloride solution to the sodium borohydride solution; reacting in an ice-water bath until no more bubbles are generated to obtain a reaction solution; adding a disodium hydrogen phosphate solution to the reaction solution; stirring; allowing to stand; collecting the precipitate; washing; and drying to obtain the copper-based nanomaterials for uranium separation. This invention also simultaneously separates boron (B) atoms and PO4 atoms. 3‑ By incorporating metallic Cu nanoparticles, copper-based nanomaterials with spatially layered charge separation were prepared. Specifically, boron atoms reduced the negative charge on the outer surface of Cu atoms, thereby enhancing the bonding of O atoms in the uranyl group and stabilizing the surface PO4. 3‑ Site, and PO4 3‑ The external O atom of the group increases the negative charge, which is beneficial for binding with the U atom in uranyl acyl to promote the electrochemical extraction of uranium.

The application belongs to the technical field of electrochemical method for reducing CO2, and particularly relates to a preparation method of ZnFe single-atom supported Cu nanoparticles for CO2 electro-reduction, which comprises the following steps: (1) synthesizing ZnFe single-atom catalyst; (2) preparing ZnFe single-atom catalyst supported Cu nanoparticles. The ZnFe single-atom catalyst is compounded with Cu nanoparticles to realize series catalysis, which can further promote the generation of multi-carbon products on the basis of Cu nanoparticles; in the CO2 electro-reduction reaction, the CO selectivity of the ZnFe single-atom catalyst is very high, CO2 is first reduced into CO on the surface of the ZnFe single-atom catalyst, and CO is adsorbed and gathered on the surface of the Cu nanoparticles to be further reduced into alcohol and olefin.

This invention discloses a multi-functional synergistic anti-tumor nanomedicine, its preparation method, and its applications, belonging to the field of nanomedicine technology. The nanomedicine is based on TCPP-Cu nanoparticles, loaded with vitamin C (Vc) and the ferroptosis inducer Erastin. This invention constructs a nanotherapeutic platform combining SDT, CDT, ferroptosis, and copper apoptosis. Its core advantage lies in achieving a cascade and synergistic effect of multiple killing mechanisms through TCPP-Cu, systematically solving problems such as limited efficiency of single therapies, tumor microenvironment inhibition, and drug resistance.

The application discloses a kind of UV yellowing-resistant TPU glass interlayer film preparation methods, belong to UV yellowing-resistant glass interlayer film technical field.It is specifically to be pre-polymerized under catalyst with polycarbonate dihydric alcohol, dicyclohexyl methane diisocyanate, partial chain extender, reactive ultraviolet absorber and hindered amine light stabilizer, and obtain prepolymer;Nano titanium dioxide, nano zinc oxide, remaining chain extender and epoxy silane coupling agent modified by silane coupling agent are then added, chain extension and in-situ hybridization are carried out, and functional TPU sizing material is obtained;Then, the film of ABC structure is prepared by three-layer co-extrusion casting, and then the surface is treated by plasma, to obtain UV yellowing-resistant TPU glass interlayer film.The application realizes the permanent fixation and synergistic effect of ultraviolet absorber and nanoparticles by the double stabilization strategy of chemical bonding and in-situ hybridization of nanoparticles, and greatly improves the yellowing resistance durability, mechanical properties and interfacial bonding strength of the interlayer film.

The invention discloses a hydrophobic coating containing polysiloxane for a barrel and a preparation method of the hydrophobic coating, and relates to the technical field of hydrophobic coatings. The preparation method comprises the following steps: firstly, preparing a polyfunctional siloxane core; the preparation method comprises the following steps: firstly, introducing octamethylcyclotetrasiloxane and trifluoropropylmethylcyclotrisiloxane through anionic ring-opening polymerization to obtain fluorine-containing polysiloxane, then introducing Si-H bonds and acrylic groups, and catalyzing hydrogen peroxide oxidation to convert part of the acrylic groups into epoxy groups to obtain fluorine-containing polysiloxane of which the arm ends simultaneously contain the acrylic groups and the epoxy groups; in addition, nano silicon dioxide is modified by mercaptoacetic acid and perfluorohexyl ethylene in sequence, and fluorine-sulfydryl-containing double modified nano silicon dioxide is obtained; and finally, mixing the two with a photoinitiator and a curing agent to obtain the hydrophobic coating. Multi-point anchoring of the nanoparticles is realized through a multi-arm structure of a polymer, and a fluorine-containing chain segment and a fluorine-containing modified layer on the surfaces of the nanoparticles have a synergistic effect, so that the compatibility of all components is good, and the hydrophobic performance of the coating is excellent.

The invention discloses a La-doped ZnFe-LDHs stable Cu nanoparticle catalyst, a preparation method thereof and application of the La-doped ZnFe-LDHs stable Cu nanoparticle catalyst in furfural hydrogenation for preparation of furfuryl alcohol, and belongs to the technical field of catalytic material preparation and biomass resource high-value utilization. ZnFe-LDHs are used as a carrier, Cu is used as an active component, La is used as a modifier, and the catalyst with the composition of La-Cu / ZnFe-LDHs is prepared; the modifier La is partially doped on the ZnFe-LDHs laminate, and partially distributed on the surface of the carrier in the form of La2O2 (CO3) nanoparticles. According to the preparation method disclosed by the invention, multi-scale stability of Cu nano-particles is realized by doping La in a ZnFe-LDHs laminate and forming a La2O2 (CO3) nano-phase on the surface of the ZnFe-LDHs laminate. La regulates and controls the electronic structure of the laminate, Cu is in a low valence state through charge redistribution, and meanwhile the anti-sintering capacity of the catalyst is improved; and the surface La2O2 (CO3) inhibits Cu migration through structure anchoring. After the catalyst is circulated for 7 times in the process of preparing furfuryl alcohol through furfural hydrogenation, the conversion rate still reaches up to 93.5%, the Cu loading capacity is as low as 4.74 wt%, and the stability of the Cu-based catalyst is remarkably improved.

The invention discloses a polyacrylate / PDA-Cu nano composite material as well as a preparation method and application thereof. The method comprises the following steps: dissolving dopamine hydrochloride in a tris (hydroxymethyl) aminomethane aqueous solution, adjusting the pH value to 8.5 by using concentrated hydrochloric acid, and stirring for reaction to obtain the polydopamine nanoparticles. The preparation method comprises the following steps: dispersing cupric acetate in an ethanol solution, adding PDA nanoparticles, carrying out ultrasonic stirring, standing, collecting a precipitate, adding the precipitate into an ethanol solution of sodium hypophosphite, carrying out reflux condensation at 80 DEG C for 30 min, and carrying out alcohol and water alternate centrifugation and drying treatment to obtain the PDA-Cu nanoparticles. And the obtained PDA-Cu nano particles are physically blended with a polyacrylate emulsion. The prepared PDA-Cu nano composite material is simple in preparation process, safe and environmentally friendly, the obtained nano composite material has a remarkable inhibition effect on growth of aspergillus niger, and the moisture permeability of a leather sample after coating is improved.

The invention discloses a polyamide nanofiltration composite catalytic membrane loaded with Ag-Cu particles as well as a preparation method and application of the polyamide nanofiltration composite catalytic membrane. The preparation method comprises the following steps: preparing a polyamide thin layer on a PVDF membrane to obtain a polyamide nanofiltration composite membrane, loading Cu nanoparticles on the polyamide nanofiltration composite membrane through a photochemical reduction reaction, and carrying out a replacement reaction with a silver nitrate solution to obtain the Ag-Cu particle loaded polyamide nanofiltration composite catalytic membrane, the loading capacity of Ag-Cu is 0.4-0.9 mg / cm < 2 >, and the loading capacity of Cu is 0.5-0.8 mg / cm < 2 >. And the percentage of Ag in the Ag-Cu ranges from 81.16% to 86.96%. According to the invention, efficient removal of 4-nitrophenol and interception of salts can be realized at the same time. The method solves the problems of difficult recovery and low reuse rate of the catalyst in the traditional removal method, and has the advantages of low separation energy consumption, high separation efficiency, easy recovery and reusability.

The invention relates to a space capsule nanometer bath therapy instrument which comprises a base, and a bath cabin is arranged at the upper end of the base. A closed bath cavity is formed in the bath cabin, a human body lies on the bath cabin, and the part below the head of the human body is located in the bath cavity; a nano particle bath assisting device is arranged in the base, and water is converted into vaporific nano water particles by the nano particle bath assisting device; a spray pipe located in the bath cavity is arranged in the bath cabin, an outlet of the spray pipe faces the human body, and an inlet is connected with an outlet of the nanoparticle bath assisting device; the inner cavity of the base, the nano particle bath assisting device, the spray pipe and the bath cavity form an annular channel; and the nano-particle bath assisting device comprises a centrifugal fan, so that nano-water particles circularly flow in the channel. The lying type design is adopted, the potential safety hazards such as falling and slipping caused by muscle weakness, poor balance capacity or limited joint movement are effectively avoided, the lying type bathing device is particularly suitable for disabled and semi-disabled people and postoperative rehabilitation patients, and the safety risk caused by a traditional showering mode is greatly reduced.

The invention relates to the technical field of building decoration, in particular to a smooth surface material anti-skid treatment method which comprises the following steps: S100, base material pretreatment: cleaning and activating the smooth base material surface to improve the surface energy of the base material surface, and coating a transparent priming coat according to the base material, forming a pretreated surface with active grafting sites; s200, preparation of an anti-skid precursor solution: preparing an ultraviolet curing anti-skid precursor solution, wherein the precursor solution comprises a photosensitive resin matrix, hydrophobic modified nanoparticles, a photoinitiator and a phase separation inducer; through unique solvent induced phase separation and step-by-step ultraviolet light curing processes, a micro-nano dual-scale structure compounded with micron-sized'micro-sucker 'pits and nano particles is grown on the surface of a smooth base material in situ, and the long-term problem that'high transparency' and'excellent wet antiskid property 'cannot be achieved at the same time in a traditional antiskid technology is creatively solved.

The invention discloses a tough composite hydrogel prepared through emulsion polymerization synchronous induced chain entanglement and nanoparticle in-situ generation and a preparation method thereof.The method comprises the steps that an oil-in-water emulsion system is adopted, a styrene monomer containing an oil-soluble initiator is dispersed in a water phase containing a water-soluble initiator, a cross-linking agent and an acrylamide monomer, and the water-soluble initiator, the cross-linking agent and the acrylamide monomer are subjected to emulsion polymerization; through one-step in-situ synchronous polymerization, uniformly distributed polystyrene nanoparticles are generated in situ in the cross-linked polyacrylamide network while the cross-linked polyacrylamide network is formed. In the process, high-density chain entanglement is innovatively and synchronously induced, a dynamic hydrogen bond interface is constructed by virtue of a surfactant, and a dual synergistic enhancement mechanism of chain entanglement energy consumption, nano particle bearing and interface dynamic action is formed. The obtained hydrogel has high strength, high toughness, excellent stretchability, fatigue resistance and good transparency, and effectively breaks through the performance balance limitation of a traditional enhancement strategy. The process is simple and convenient, and a new way is provided for preparation of the high-performance intelligent soft material.

The invention relates to the technical field of micro-nano, and discloses a drug-loaded microalgae motor as well as a preparation method and application thereof. The drug-loaded microalgae motor comprises a microalgae motor and a nano-particle drug loaded on the microalgae motor, the microalgae motor is connected with the nano-particle drug through electrostatic adsorption, and microalgae is natural or engineered unicellular algae with movement ability. The nanoparticle drug is formed by self-assembling natural polysaccharide and natural active substances after covalent cross-linking. According to the invention, the microalgae motor can autonomously move in the gastrointestinal tract by utilizing the flagellum movement of the microalgae, and is actively targeted to the colitis disease part, so that the local concentration of the medicine is improved, and the curative effect is enhanced. The microalgae motor combines the strong anti-oxidation / anti-inflammatory activity of astaxanthin and the biological activity of microalgae, and can synergistically relieve colitis in multiple ways.

The invention discloses an AlOOH / Ag composite SERS (Surface Enhanced Raman Scattering) substrate with high-density OH vacancy as well as a preparation method and application of the AlOOH / Ag composite SERS substrate, and belongs to the technical field of nano materials and detection. The preparation method comprises the following steps: synthesizing layered AlOOH with rich surface hydroxyl vacancies (OHv) through a urea regulation and control one-step hydrothermal method; and then, high-density and small-size Ag nano particles are uniformly loaded on AlOOH through an in-situ reduction method. The core innovation of the invention lies in that unique OHv / Al < 3 + > active sites on the surface of AlOOH are used as an efficient molecular adsorption and charge transfer center to generate a strong synergistic effect with electromagnetic field enhancement of Ag nanoparticles, so that extremely high SERS activity is obtained. The substrate is easy to prepare, low in cost and good in stability, the detection limit of organic pollutants such as p-alkynyl aniline can reach 10 <-9 > M level, and the substrate has wide application prospects in the fields of environment monitoring, food safety, catalytic reaction process monitoring and the like.

The application discloses a Cu / g-C3N4 supported catalyst and a preparation method and application thereof. The Cu / g-C3N4 supported catalyst comprises the following steps: preparing Cu nanoparticles with different sizes, and combining the Cu nanoparticles with g-C3N4 nanosheets to form a supported catalyst. The application also provides application of the Cu / g-C3N4 supported catalyst in a carbon monoxide electro-reduction reaction, and high-purity acetic acid solution is directly obtained by using CO as a raw material. The preparation method of the Cu / g-C3N4 supported catalyst is high in controllability, the Cu / g-C3N4 supported catalyst is obtained, and the Cu / g-C3N4 supported catalyst has two catalytic regions of a Cu / g-C3N4 interface and a Cu nanoparticle surface, and the two catalytic regions respectively realize initial hydrogenation, subsequent coupling and hydrogenation of CO, can efficiently catalyze conversion of CO into acetic acid (salt), and simultaneously has excellent stability, and is suitable for commercial use.