The invention discloses a novel unmarked electrochemical immunosensor for detecting myeloperoxidase (MPO) based on copper-palladium-platinum nano wire mesh materials (CuPdPt NNWs). Due to the fact that a copper-palladium-platinum nano wire mesh structure has excellent electronic conductivity and shows good catalytic activity on hydrogen peroxide, the copper-palladium-platinum nano wire mesh materials are regarded as novel effective electric catalyst. Meanwhile, the mesh structure provides a large surface area for electro-deposition gold nanoparticles (AuNP). The AuPNs not only improves conduction of electrons, but also fixes antibodies through covalent binding. As a result, the unmarked immunosensor shows more sensitive detection on the MPO. Under the best experimental condition, the immunosensor shows a wide linearity range from 100 fg mL1 to 50 ng mL1, and the lowest detectable limit is 33.3 fg mL-1(S/N=3). In addition, the unmarked immunosensor is used for measuring the MPO in humanserum, and the recovery rate is 99.8-103.6%, so that it is indicated that the electrochemical immunosensor can be applied to actual detection of the MPO. Meanwhile, the electrochemical immunosensor can also be used for detection of other biomarkers in the serum.

Biosensor for detecting myeloperoxidase based on copper-palladium-platinum nano mesh materials

The invention provides a device and method for macro purification of metal-based nanowires. A dynamic stirring centrifugal filtration device comprises a solution pouring system, a filter cylinder anda filtrate flow-out system. The filter cylinder comprises a filter skeleton, a stirring device and filter films. The filter films comprise a first region, a second filter region and a third filter region sequentially in the perpendicular direction. The inward included angle between any two of the first region, the second filter region and the third filter region is smaller than 180 degrees. A plurality of filter holes are distributed in the first region, the second filter region and the third filter region. A larger filter area is achieved, more liquid is allowed to be filtered simultaneously,and the three kinds of filter films are fixed to the filter cylinder through the skeleton on the filter cylinder. Through the device and method, cumbersome steps, a complex process, high cost and other core problems faced by present metal nanowire industrial preparation purification aftertreatment are basically solved.

Device and method for macro purification of metal-based nanowires

The invention relates to a preparing method and application of a gold-copper nanowire material. A liquid phase substitution method is adopted, by means of activity difference between metal copper andmetal gold, and the copper nanowire is used as a template and subjected to replacement reaction with a chloroauric acid solution to obtain gold-copper nanowire. The preparing method has the advantagesof being concise in technical process, mild in reaction condition, short in reaction time and low in cost, and product morphology is regular, the gold-copper nanowire catalyst is used for catalytic degradation of dye waste water, sodium borohydride is used as reductant, and the catalytic performance for catalytically degrading the dye waste water of the compound material is inspected; the catalyst is recovered and reused to inspect the reuse effect, and the catalyst has the advantages of being high in catalytic activity, high in recover and reuse rate and wide in application prospect.

Preparing method and application of gold-copper nanowire material

The invention provides a preparation method of a copper nanometer structure loaded with single atoms. The method comprises the steps that a copper oxide nanometer structure and metal nanometer particles are mixed in solvent, the obtained copper oxide nanometer structure loaded with the metal nanometer particles is calcined, and the copper nanometer structure loaded with the single atoms is obtained. According to the method, after the copper oxide nanometer structure serving as a substrate material is combined with the metal nanometer particles, the calcining reduction method is adopted for preparation to obtain the copper nanometer material loaded with the single atoms, and the single atoms growing on the surface of a copper nanometer sheet are uniform. The preparation method is easy to operate, complex equipment is not needed, the condition is mild, the template material is easy to obtain, the process is controllable, the raw materials are wide in source, industrialization is achievedbeneficially, and the prepared copper nanometer structure loaded with the single atoms has a wide application prospect in the field of catalyzing, energy storing, photoelectric detection and the like. The invention further provides the copper nanometer structure loaded with the single atoms.

Copper nanometer structure loaded with single atoms and preparation method and application thereof

The invention relates to a conductive thin film and a polyaniline/metal nanowire composite counter electrode for dye-sensitized solar cells containing the conductive thin film The conductive thin film can be used for the polyaniline/metal nanowire composite counter electrode for the dye-sensitized solar cells The composite counter electrode has simple preparation, low cost, considerable conductivity, catalytic performance and oxidation resistance The conductive thin film is arranged on a substrate, and comprises a metal nanowire thin film and a protective layer which are connected in series from bottom to top, wherein the protective layer is an oxide film, or an oxide film and a composite structure of a PEDOT:PSS thin film overlaid on the oxide film, oxides are at least one of tin oxide, titanium oxide, or zinc oxide The polyaniline/metal nanowire composite counter electrode for the dye-sensitized solar cells containing the conductive thin film comprises the substrate, the conductive thin film and a polyaniline thin film sequentially connected from bottom to top

Conductive thin film and polyaniline/metal nanowire composite counter electrode for dye-sensitized solar cells

The invention provides a preparation method of a copper-based noble metal catalyst. The preparation method comprises the following steps: mixing a copper-nano wire and a mixed solvent to obtain copper-nano wire dispersion liquid; preparing a noble metal precursor solution; heating and refluxing the copper-nano wire dispersion liquid, and then performing replacement reaction on the copper-nano wire dispersion liquid and the noble metal precursor solution to obtain the copper-based noble metal catalyst, wherein the mixed solvent comprises a good solvent and a poor solvent, the good solvent is selected from one or both of methylbenzene and trichloromethane, and the poor solvent is selected from one or more of dimethyl sulfoxide, normal hexane, cyclohexane, isopropyl alcohol, ethyl alcohol and acetone. In the preparation process of the copper-based noble metal catalyst, by selecting the proper good solvent and the proper poor solvent, the reaction rate and the product appearance are regulated favorably, so that a one-dimensional nano-structure catalyst with the self-supporting characteristic is prepared, and the copper-based noble metal catalyst has excellent electrochemical activity and catalytic stability.

Copper-based noble metal catalyst, and preparation method and application thereof

The invention provides a purification method for copper nanowires. The purification method for the copper nanowires comprises the following steps that firstly, centrifugation is conducted on mother liquor, the mother liquor is then mixed with water, the obtained mixed liquor is transferred to another container; and secondly, the container is oscillated and then rotated, so that copper nanowire agglomerates can be retained on the inner wall of the container, the liquor existing after purification is discharged, and then the copper nanowires are obtained. In the purification process of the copper nanowires, the operations of centrifugal separation, aqueous dispersion, oscillation and rotating separation are sequentially conducted, and then the purified copper nanowires are obtained. According to the purification method for the copper nanowires, micelles in the mother liquor are destroyed through physical means, so that the copper nanowires form the insoluble floating agglomerates, and finally the purity of the purified copper nanowires is high.

Li Huihui

Papers

Copper-based noble metal catalyst, and preparation method and application thereof

Purification method for copper nanowires