6 results about "Chemically modified electrode" patented technology

The invention discloses a method for high-value utilization of micro mineral powder solid waste, which comprises the following steps of: naturally air-drying micro mineral powder, grinding and sieving to obtain a micro mineral powder raw material; uniformly mixing the micro mineral powder with biomass in different proportions, performing high-temperature oxygen-limited pyrolysis in a muffle furnace, and modifying by phosphoric acid, citric acid, CaCl2 and the like to obtain a micro mineral powder / biomass nano composite material; dispersing the micro mineral powder / biomass nano composite material and chitosan in water, and performing ultrasonic compounding for a period of time to obtain a chitosan / micro mineral powder / biomass nano composite material mixed solution; dispensing the mixed solution on the surface of a glassy carbon electrode to prepare a chemically modified electrode; the electrode is used for detecting dopamine and nitrite substances. The micro mineral powder nano material with high electrocatalytic activity can be prepared and can be used as an electrode material in the fields of batteries, electrochemical sensors, capacitors and the like.

The application discloses a chemical modified electrode for detecting furazolidone and an electrochemical detection method thereof, and relates to the technical field of electrochemical detection, and comprises the following steps: (1) preparation of longan carbon; (2) preparation of nitrogen-doped longan carbon material (NCs); (3) preparation of nitrogen-doped longan carbon-polydopamine material (NCs-PDA); (4) preparation of NCs-PDA / SPCE modified electrode; (5) electrochemical detection of FZD; and (6) characterization of NCs-PDA / SPCE. The chemical modified electrode for detecting furazolidone and the electrochemical detection method thereof use longan shells as a carbon source, chitosan and urea as nitrogen sources, and prepare a nitrogen-doped porous carbon material through a high-temperature carbonization method, combine polydopamine and a portable disposable screen-printed carbon electrode (SPCE), prepare an electrochemical modified electrode NCs-PDA / SPCE for detecting furazolidone, and establish an electrochemical rapid detection method for detecting furazolidone in animal-derived food based on the modified electrode.

The application provides a complex sweetener electrochemical modification electrode and a preparation method and application thereof. The NO2-MIL-53(Cu-Al) bimetallic organic framework material is prepared by a simple one-step hydrothermal method, and is used as an electrochemical active material to prepare the NO2-MIL-53(Cu-Al) modified modification electrode on a glassy carbon electrode by a drop coating method. The coupling effect between the two metal ions is used to improve the conductivity and catalytic ability of the material, and an electrochemical sensor capable of rapidly and sensitively detecting the complex sweetener and sucralose is constructed. In addition, in order to verify the practical application ability of the modified electrode, quantitative analysis is carried out on the actual sample containing the complex sweetener, and it is proved that the sensor has good anti-interference ability and recovery rate, which is consistent with the determination result of high performance liquid chromatography. Meanwhile, the method is low in cost, green and environment-friendly, and simple in process, and provides a new method for rapidly and sensitively detecting the complex sweetener in the actual sample.

The invention provides a chemically modified electrode for detecting mercury ions and an electrochemical detection method thereof, and belongs to the technical field of heavy metal residue detection. A nitrogen-doped porous longan carbon material (NPCs) is used as a carrier, an NPCs-loaded ferroferric oxide nanoparticle (Fe3O4NPs (at) NPCs) composite material is prepared through a solvothermal method, the surface of a silk-screen printing carbon electrode (SPCE) is coated with the NPCs-loaded ferroferric oxide nanoparticle (Fe3O4NPs (at) NPCs) composite material, Fe3O4NPs (at) NPCs / SPCE is obtained, then gold nanoparticles (AuNPs) are modified through an electro-deposition method, an AuNPs / Fe3O4NPs (at) NPCs / SPCE modified electrode is prepared, and the AuNPs / Fe3O4NPs (at) NPCs / SPCE modified electrode is used as a negative electrode. And an electrochemical rapid detection method for detecting mercury ions in aquatic products based on the modified electrode is established. The modified electrode provided by the invention is good in stability and high in test sensitivity, and has good application potential in the field of rapid detection of Hg (II) in aquatic products.

The application relates to the technical field of chemically modified electrodes, and discloses an electrode modification material, a preparation method and application thereof. The electrode modification material comprises graphene oxide doped polyacrylonitrile-based carbon nanofibers and UIO-66-NH2; the UIO-66-NH2 is loaded on the surface of the graphene oxide doped polyacrylonitrile-based carbon nanofibers. The electrode modification material provided by the application is graphene oxide doped polyacrylonitrile-based carbon nanofibers uniformly dispersed with UIO-66-NH2 on the surface. The UIO-66-NH2 is stable in water, has a large specific surface area and high porosity, the graphene oxide improves the strength, hardness and conductivity of the carbon nanofibers, the conductivity and electrochemical activity are improved after the UIO-66-NH2 is combined with the graphene oxide doped polyacrylonitrile-based carbon nanofibers, the obtained electrode modification material has a large specific surface area, many active sites and high electrocatalytic activity.

The invention relates to the technical field of electrochemical analysis and detection, in particular to a novel method for preparing a palladium chloride modified electrode. According to the technical scheme, the method comprises the steps of preparing a modified electrode; optimizing the chemically modified electrode; the electrode is applied to borax determination. The invention aims to prepare a palladium chloride modified electrode by using an electrochemical method, and research an electrochemical response curve of borax on the modified electrode and a determination method thereof. The electrode has good selectivity on borax, high electrochemical stability, good sensitivity and strong anti-interference capability.