The invention belongs to the technical field of nano material application, and particularly relates to a perfluorinated sulfonic acid resin (Nafion) modified SnO2-coated ZnO nanotube array electrode used for detecting dopamine and the application of the nanotube array electrode. The nanotube array electrode comprises a conductive substrate and a Nafion modified polycrystal SiO2 nano-particle film-coated single-crystal ZnO nanotube array which vertically grows on the conductive substrate. The Nafion modified SnO2-coated ZnO nanotube array electrode used for detecting the dopamine can be used for detecting the dopamine in water solution; when the nanotube array electrode is taken as a working electrode, a platinum gauze electrode is used as a counter electrode, a saturated calomel electrode is used as a reference electrode, and a cyclic voltammetry (CV) or differential pulse voltammetry (DPV) is used for detecting the dopamine in water solution, the nanotube array electrode is capable of generating very strong electrochemical signals.

Perfluorinated sulfonic acid resin modified SnO2-coated ZnO nanotube array electrode used for detecting dopamine and application of nanotube array electrode

Preparation method of multiwalled carbon nanotube (MWCNT)/ ferroferric oxide (Fe3O4)/zinc oxide (ZnO) ternary heterogeneous nanocomposite

The invention provides a carbon nanotube composite material prepared from a branching macromolecule modified carbon nanotube with an amphiphilic photoelectric activity function and a preparation method of an electrochemical sensor with the carbon nanotube composite material, and belongs to the field of macromolecule self-assembling and composite material electrochemical sensors. The carbon nanotube composite material electrochemical sensor is prepared by the following steps: (1) firstly, synthesizing a macromolecule with an amphiphilic photoelectric activity branching function; (2) modifying a carbon nanotube with the synthesized functional macromolecule to prepare the water dispersible carbon nanotube composite material; (3) dropwise adding carbon nanotube composite material dispersion liquid onto a clean electrode surface and crosslinking under UV irradiation to form a membrane; and (4) inserting a modified electrode into a lithium perchlorate/acetonitrile solution for electric polymerization to prepare the carbon nanotube composite material electrochemical sensor. The method has energy-saving and environment-friendly effects by using water as a solvent. Besides, the prepared nano composite material sensor is good in stability and high in sensitivity, and the service life of the nano composite material sensor is prolonged.

Preparation of carbon nanotube composite material electrochemical sensor capable of detecting dopamine and paracetamol simultaneously

The invention belongs to the technical field of electrode materials, particularly relates to a preparation method and application of a poly-sulfosalicylic acid / titanium dioxide / carbon nanotube nanocomposite with electrode as the substrate. The preparation method includes the following steps: first, uniformly dropwise coating a mixed solution of a nanotube carbon suspension and nano-titanium dioxide colloidal on the surface of an activated white electrode, drying and placing the electrode in an aqueous solution of sulfanilic acid for cyclic voltammetry polymerization, airing the electrode after polymerization to obtain the poly-sulfosalicylic acid / titanium dioxide / carbon nanotube nanocomposite with electrode as the substrate. The nanocomposite prepared by the invention has good electron transport properties, can effectively avoid the fast photo-generated electron-hole recombination of titanium dioxide, and has high selectivity and sensitivity. The nanocomposite prepared by the invention has wide application prospects in biomolecule separation and determination.

Preparation method and application of poly-sulfosalicylic acid / titanium dioxide / carbon nanotube nanocomposite with electrode as substrate

Preparation method and application of carbon nanometer pipe/poly-nicotinic acid composite ornament electrode

The invention provides a modified electrode based on a functionalized multi-walled carbon nanotube, an electrochemical system and application thereof. In the presence of AA (ascorbic acid) and UA (uric acid), a glassy carbon electrode volt-ampere sensor modified by the f-MWCNT (functionalized multi-walled carbon nanotube) made from SDS (sodium dodecyl sulfate) can be used for sensitively detecting DA (dopi amine). The f-MWCNT-glassy carbon electrode sensor not only has high oxidative and catalytic activity for the DA and the UA, but also can completely eliminate interference of the AA with the DA and simultaneously well distinguish the DA from the UA, thereby detecting the DA. A detection line for the DA by means of square wave voltammetry is 2.0X10-8, and the sensor has fine sensitivity, selectivity and stability.

Modified electrode based on functionalized multi-walled carbon nanotube, electrochemical system and application thereof

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Modified electrode based on functionalized multi-walled carbon nanotube, electrochemical system and application thereof