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

The invention discloses a method for predicting inhibiting concentration of a pyridazine HCV NS5B polymerase inhibitor based on a particle swarm optimization (PSO) support vector machine (SVM). The method comprising the following steps: establishing and optimizing a sample set, calculating inhibitor molecule descriptor, preprocessing a molecule descriptor data set, rescaling the inhibitor molecule descriptor data set, dividing the data set, optimizing support vector machine parameters, establishing a model and predicting. The method for predicting the inhibiting concentration of the pyridazine HCV NS5B polymerase inhibitor based on the particle swarm optimization support vector machine is an SVM parameter selecting method based on a PSO algorithm, the optimization of the model is achieved by using the high global searching ability of the PSO, a relational model is established through the structure and the inhibiting concentration of the pyridazine HCV NS5B polymerase inhibitor, accurate predicting is conducted on the inhibiting concentration of the pyridazine HCV NS5B polymerase inhibitor, effectiveness of the method is verified, an excellent method for predicting the inhibiting concentration of other inhibitors is provided, and predicting conducted on unknown output can be accurate as far as possible.

Method for predicting inhibiting concentration of pyridazine HCV NS5B polymerase inhibitor based on particle swarm optimization support vector machine

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

The invention relates to a method for binding and fixing an ionic type iridium coordination compound based on a covalent bond, belonging to the field of electrochemiluminescence detection. The method comprises the following steps: firstly, preparing an ionic type iridium coordination compound hexafluorophosphoric acid di(6-methyl-2,4-(4'-methoxy)-diphenyl quinoline (4,4'-dicarboxyl-2,2'-dipyridyl) coordination iridium ((dpq-OCH3)2Ir(dcbpy)+PF6-) with carboxyl by adopting an organic synthesis method, respectively adding 1-ethyl-(3-dimethyl aminopropyl) carbonyl diimine (EDC) and N-hydroxyl succinimide (NHS) to activate the carboxyl, then, adding mercaptoethylamine to stir and react with the carboxyl; and then, preparing nanogold on the surface of a glassy carbon electrode by adopting an electrodeposition method, inserting a prepared electrode into the solution system, and forming an Au-S covalent bond through chemical reaction of the two, and loading the ionic type iridium coordination compound on the electrode. An electrochemiluminescence solid-phase electrode prepared by the method has good response for coreactant dibutyaminoethanol (DBAE).

Method for binding and fixing ionic type iridium coordination compound based on covalent bond

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 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

The invention relates to a method for predicting the inhibiting concentration of an inhibitor of cytosolic phospholipase A2alpha based on a support vector machine, and belongs to the cross field of chemometrics and cheminformatics. By establishing a relational model between the molecular structure and the inhibiting concentration of one inhibitor through the support vector machine, the inhibiting concentration corresponding to the inhibitor can be predicted as long as the molecular structure of the inhibitor is known. The prediction accuracy rate of the method can achieve over 90 percent, the model is stable, the risk of inhibitor development in a later period can be reduced, and the cost of research and development can be reduced.

Method for predicting inhibiting concentration of inhibitor of cytosolic phospholipase A2alpha based on support vector machine

The utility model discloses an electrochemical luminescence detection cell. The electrochemical luminescence detection cell comprises a detection cell body, a baseboard, a liquid storage cell, an optical glass window, a working electrode, a reference electrode, a reference electrode mounting hole, an auxiliary electrode, an auxiliary electrode mounting hole and air vent holes, wherein the detection cell body is connected with the baseboard through screws; the liquid storage cell is formed in the center of the detection cell body; the bottom of the detection cell body is opposite to the optical glass window; the optical glass window and the detection cell body are sealed through a rubber gasket; a light transmission hole is formed in the center of the baseboard; the reference electrode mounting hole and the reference electrode mounting hole are communicated with the liquid storage cell respectively; and two sides of the liquid storage cell have an air vent hole respectively, and the air vent holes are communicated with the liquid storage cell and the reference electrode mounting hole as well as the liquid storage cell and the auxiliary electrode mounting hole respectively. Through the electrochemical luminescence detection cell, the defects of large volume, unfixed working electrodes and the like of the conventional electrochemical luminescence detection cell are overcome. The electrochemical luminescence detection cell has the advantages of a small amount of provided test liquid, fixed working electrodes, high popularity and the like and is easy to disassemble and clean.

Electrochemical luminescence detection cell

Modified electrode and preparation method thereof

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

Method for predicting inhibiting concentration of inhibitor of cytosolic phospholipase A2alpha based on support vector machine

Electrochemical luminescence detection cell

Modified electrode and preparation method thereof