35 results about "Single-walled carbon nanohorn" patented technology

The invention discloses a platinum/carbon-based nano composite material, and a preparation method and application thereof. The preparation method comprises the following steps: with radiation of gamma rays or electron beams, inducing reduction of a platinum metal precursor, and simultaneously, carrying out irradiating modification on single-wall carbon nanohorn or a mixed carbon material of single-wall carbon nanohorn and oxidized graphite, thereby obtaining the platinum/carbon-based nano composite material with the platinum loading amount being 0.5wt%-50wt%. The platinum/carbon-based nano composite material can be used as an electric catalyst of a proton exchange membrane fuel cell.

The electromagnetic wave absorbing material excellent in electrical conductivity and dispersibility and containing a carbon material suitable for an electromagnetic wave absorbing material is an electromagnetic wave absorbing material characterized by containing a fibrous carbon nanohorn aggregate composed of a plurality of single-walled carbon nanohorns gathering in a fibrous form, the fibrous carbon nanohorn aggregate contains single-walled carbon nanotubes inside, and by fabricating using a catalyst-containing carbon target containing a single body of Fe, Ni or Co or a mixture thereof, a fibrous carbon nanohorn aggregate including the metal contained in the target is obtained.

The invention relates to a nanoprobe for heavy metal ion up-conversion luminescence detection and a preparation method thereof. The nanoprobe is formed by combining an energy donor and an energy receptor through pi-pi bond interaction and is characterized in that the energy donor is formed by carboxyl-functionalized up-conversion luminescence nanocrystallines (CS-UCNPs) with a core-shell structure and probe DNA molecules capable of specifically identifying heavy metal ions through covalent bond assembly, wherein the molar ratio of probe DNA to the up-conversion luminescence nanocrystallines is 1:2000-2500. The surface carboxylation rate of the up-conversion luminescence nanocrystallines is 30%-60%. The energy receptor is single-walled carbon nanohorns (SWCNHs), graphene oxide (GO) or carbon nanotubes (WCNTs). The mass ratio of the energy donor to the energy receptor is 15:1-30:1. The preparation method has the advantages of being simple in process, convenient to operate and easy to control structurally, the prepared nanoprobe is uniform in size and stable in structure, has the advantages of being low in toxicity and good in biocompatibility and has potential application value in the fields of cell genetics, research on molecular biology and the like.

The invention discloses a method for preparing a single-wall carbon nanohorn-hollow nanogold compound. The method for preparing the single-wall carbon nanohorn-hollow nanogold compound comprises the steps that single-wall carbon nanohorn powder, water and PDDA are mixed, the single-wall carbon nanohorn powder is made to be dissolved completely through ultrasonic waves, and then a single-wall carbon nanohorn solution is obtained; CoCl2, PVP K30 and water are mixed, the CoCl2 and the PVP K30 are made to be dissolved completely through stirring, a CoCl2 solution is obtained, deoxidization is conducted by introducing nitrogen into the solution, an NaBH4 solution is added dropwise under the stirring condition, CoCl2 reduction is conducted, and then a cobalt solution is obtained; the single-wall carbon nanohorn solution is added to the cobalt solution, an HAuCl4 solution is added after the single-wall carbon nanohorn solution and the cobalt solution are evenly mixed, sediment is collected in a centrifugal mode, washing is conducted, re-suspension is conducted with water, and thus the single-wall carbon nanohorn-hollow nanogold compound is obtained. According to the method for preparing the single-wall carbon nanohorn-hollow nanogold compound, in-situ synthesis of the single-wall carbon nanohorn-hollow nanogold compound is achieved according to a one-step method, the process is simple, the time is short, the yield is high, stripping between components is avoided effectively, and the prepared compound is high in stability, resistant to shock and high in shear resistance, has more binding sites, and is larger in specific surface area and higher in physical adsorption capacity and chemical adsorption capacity.

The invention relates to a method for synthesizing mesoporous zeolite by using single-walled carbon nanohorn as a structural template. The mesoporous zeolite can be applied to a petrochemical industry, a fine chemical industry and other chemical industries as a catalyst, an adsorbent, a chemically active substance (such as metal particles) carrier, a liquid-phase or gas-phase separating material and the like, and can also be applied to waste gas treatment, wastewater treatment and other environmental engineering.

The invention discloses a solid-state ion selective electrode based on a single-walled carbon nanohorn electrode. The solid-state ion selective electrode comprises an electrode substrate and an ion selective polymer membrane coating the electrode substrate surface; the electrode substrate is an electrode doped with a single-walled carbon nanohorn or an electrode modified by the single-walled carbon nanohorn membrane on the surface. Compared with an ion selective electrode containing inner filling liquid, the solid-state ion selective electrode has high sensitivity and selectivity, and can develop in microelectrode direction.

A capillary electrochromatography monolithic column modified with single wall carbon nanohorns is provided. A preparing method of the capillary electrochromatography monolithic column includes mixing the single wall carbon nanohorns with styrene, performing ultrasonic dispersing to obtain a styrene dispersion of the single wall carbon nanohorns, mixing the dispersion with cyclohexanol, adding divinylbenzene, toluene, a radical initiator and 2-acrylamido-2-methylpropane sulfonic acid after ultrasonic dispersing, continuously ultrasonic dispersing, feeding nitrogen to obtain a reaction mixture liquid, introducing the reaction mixture liquid into a preset stationary phase position in a pretreated capillary, sealing ports at two ends of the capillary with silica gel, solidifying at 40-100 DEG C for 2-8 h, and subjecting the capillary to after-treatment to obtain the capillary electrochromatography monolithic column. The single wall carbon nanohorns are applied into the capillary electrochromatography monolithic column for the first time, and a preparing process is simple, few in steps, controllable in reaction conditions and ideal in preparing effects.

A single walled carbon nanohorn adsorptive material which comprises a single walled carbon nanohorn and a lanthanide metal supported thereon, and has the adsorptivity for methane. The single walled carbon nanohorn adsorptive material can adsorb much methane and is effective as a methane adsorbing material.

The invention relates to a method for modifying oxidized single-walled carbon nanohorns by virtue of povidone, in particular to a novel drug loading system for loading docetaxel based on a single-walled carbon nanohorn-povidone compound which is built up by virtue of a nano-precipitation method. Through non-covalent modification of the povidone on the single-walled carbon nanohorns, the dispersity and the stability of the single-walled carbon nanohorns in water and a phosphate buffer solution can be effectively improved. On the basis of a [pi]-[pi] effect, by loading an anti-tumor drug, namely the docetaxel, with the compound single-walled carbon nanohorn-povidone, the water insolubility of the docetaxel is effectively improved and biocompatibility is improved; and the drug loading system is high in drug loading rate and significant in sustained-release effects, and the application of the single-walled carbon nanohorns in the field of nano-biomedicine is expanded.

A preparation method of a functional single-walled carbon nanohorn comprises the steps of modifying SWCNH at first, dispersing SWCHN in a nitric acid solution to obtain carboxylated SWCNH dispersion liquid, carrying out centrifuging, washing and filtering and vacuum drying, and then preparing the carboxylated SWCNH dispersion liquid into 0.5-1.0 mg/mL of dispersion liquid; and then functionalizingSWCNH, reacting at the temperature of 70-80 DEG C for 8-12 hours under protection of nitrogen by taking carboxylated SWCNH and triethylene tetramine as raw materials and taking 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and N-hydroxysuccinimide as catalysts, cooling to the room temperature, centrifuging to remove supernatant liquid, and washing and drying under vacuum to obtain the product. Abundant amino and imine groups are grafted on the surface of SWCNH with large specific surface area to modify SWCNH, the prepared SWCNH-TETA composite material selectively adsorbs U ions,and the adsorbing capacity and adsorption speed are higher.

The invention relates to a tumor targeted nano drug loading system with a controlled-release effect and a preparation method thereof, in particular to a method of adopting a nano precipitation method to enable single-wall carbon nanohorn to efficiently load first-class antitumor drug methotrexate (MTX). Polyethylene glycol is used as a solubilizer to modify the single-wall carbon nanohorn (MTX@oxSWNHs) loaded with the drug, so that water solubility and biocompatibility of MTX@oxSWNHs are improved obviously, and the drug loading system has a good controlled-release effect. Transferrin (Tf) is used as a targeting agent, so that the drug loading system has capability of targeted positioning and targeted releasing. Concentration of drug at a focus is increased, and toxic and side effect, on normal cells, of the drug is reduced greatly. The drug loading system has the advantages of being high in drug loading capacity and biocompatibility and capable of prolonging in-vivo circulating time of slightly-soluble antitumor drug, having targeting performance and being capable of improving the treatment effect of the drug.

The invention successfully develops a specificity hypersensitivity sandwiched electrochemical immune sensor on the basis of a novel gold nanorod-streptavidin (AuNPs-SA) composite material and carboxylsingle-wall nanometer angle-sulfur-doped platinum (c-SWCNHs/S-PtNC) and is used for detecting Alpha2, 6 sialyl gylcan (Alpha2, 6-sial-Gs) in human serum. By the gold nanorod-streptavidin (AuNPs-SA),the conductivity of an electrode is improved, electron transfer is improved, and meanwhile, an active site is provided for an immobilization biotin-labeled black elderberry (bio-SNA) by the streptavidin and a biotin system. Moreover, the c-SWCNHs/S-PtNC has excellent catalytic performance on reduction of H2O2, and triamido phenylboronic acid (M-APBA) can be effectively captured by Pt-NH2 and NH-CO-. The sensor has the advantages of wide linear range, high sensitivity, high specificity and favorable reusability and is rapid to detect, and the sensor can be used for measuring Alpha2, 6-sial-Gs content in human serum and has huge potential in clinical test.

The water-soluble carbon nanocomposite material for dual phototherapy is a π-π planar conjugated complex composed of single-walled carbon nanohorns or single-layer uncurled graphene and water-soluble phthalocyanine. Its preparation method includes (1) dissolving water-soluble phthalocyanine with secondary water, preparing it to a mass concentration of 10% to 15%, adding single-walled carbon nanohorn or single-layer non-curling Graphene is ultrasonically ultrasonicated for 30 to 180 minutes; (2) centrifuge the above-prepared dispersion, filter it with suction, wash it, and dry it. Under the action of infrared light source, the composite material has dual therapeutic effects of photothermal and photodynamic, which enhances the killing efficiency of cancer cells; the preparation method is simple, and one-step ultrasonic method can solve the problem of single-walled carbon nanohorn or single-layer non-curled graphene. The water solubility of the carbon nanocomposite is loaded with photodynamic therapy agent, and the non-covalent modification is used, which does not destroy the surface characteristics of the carbon nanocomposite.

The invention provides a quantum dot composite material. The quantum dot composite material quantum dot composite material comprises quantum dots, a thermally induced delayed fluorescence material and single-walled carbon nanohorns, and the single-walled carbon nanohorns and the quantum dots are combined on the surface of the thermally induced delayed fluorescence material. The quantum dot composite material provided by the invention improves the luminous efficiency of the quantum dots.

The invention discloses a high-zinc-layer optical cable stranded wire and a preparation process thereof, and particularly relates to the technical field of optical cable stranded wires. The high-zinc-layer optical cable stranded wire comprises a stainless steel wire, a modification liquid and a zinc plating base material. According to the optical cable stranded wire, the performance requirements of high tensile strength and corrosion resistance of the high-zinc-layer optical cable stranded wire can be effectively ensured, the problem of pitting corrosion and rusting of the zinc-layer optical cable stranded wire in the long-term use process is solved, and the service life is prolonged; cellulose nanowhiskers, silicon carbide nanowires and single-walled carbon nanohorns are combined to modify the surface of the stainless steel wire, so that various properties of the stainless steel wire can be effectively enhanced, and then the combination effect of a zinc coating and the stainless steel wire is enhanced; nitrogen is adopted to smear zinc, the smeared zinc is relatively less, the DV value of the steel wire can be increased, and the service life of the stainless steel wire is prolonged; therefore, the zinc content of the steel wire is greatly improved, and the final product has both tensile strength and corrosion resistance; and a novel bakelite pressing die is adopted, the twisting effect is effectively guaranteed, and the service life of equipment is prolonged.

The invention discloses a polymeric alizarin functionalized single-wall carbon nanohorn composite material-based electrochemical sensor. The alizarin functionalized single-walled carbon nanohorn solution can be prepared through non-covalent functionalization action, and the dispersity of single-walled carbon nanohorn in water can be enhanced. In addition, a polymeric alizarin-modified thin film printed chip electrode can be prepared by utilizing cyclic voltammetry electrochemical polymerization. According to the prepared sensor, the significant synergistic enhancement effect on the electrochemical determination of phenol compounds can be achieved by utilizing the excellent conductivity of the single-wall carbon nanohorn and the electric catalysis activity to the phenol compounds. The on-site fast detection to phenol pollutants can be realized, and the polymeric alizarin functionalized single-wall carbon nanohorn composite material-based electrochemical sensor is easy and portable, the method is simple and convenient and high in accuracy, good in sensitivity and low in detection limit.

The invention relates to a preparation method of a carbon oxide nanohorn/sodium alginate-silver composite antibacterial agent, the antibacterial agent, an antibacterial coating and an antibacterial film. The preparation method of the carbon oxide nanohorn/sodium alginate-silver composite antibacterial agent comprises the following steps: modifying carbon nanohorns to obtain the carbon oxide nanohorns, and preparing the carbon oxide nanohorn into a carbon oxide nanohorn dispersion liquid; taking a sodium alginate solution, adding a silver nitrate solution into the sodium alginate solution, stirring, and adding the carbon oxide nanohorn dispersion liquid to obtain a mixed solution; and irradiating the mixed solution with ultraviolet rays to obtain a carbon oxide nanohorn/sodium alginate-silver dispersion liquid, centrifuging the dispersion liquid to collect precipitates, washing the precipitates, and dispersing the precipitates in deionized water to obtain the carbon oxide nanohorn/sodium alginate-silver composite antibacterial agent. The oxidized single-walled carbon nanohorn is used as a carrier, so that the binding force between the oxidized single-walled carbon nanohorn and the nano-silver can be enhanced, and the antibacterial agent has the effects of ultraviolet resistance and high temperature resistance.