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Screen printing carbon electrode pretreatment method

A technology of screen printing and carbon electrodes, which is applied in the direction of printing and printing devices, can solve the problems of polishing technology and polishing material requirements, unsatisfactory activation effect, easy to damage electrodes, etc., and achieve simple pretreatment methods and reversible electrodes The effect of enhancing sex and electron transfer rate and eliminating interference

Inactive Publication Date: 2008-08-06
FUZHOU UNIV
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  • Abstract
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Problems solved by technology

At present, several methods of processing printed electrodes have been reported in the literature. One method is to mechanically polish the electrodes, but this method has relatively high requirements on the polishing technology and polishing materials of the operator, and it is easy to damage the electrodes.
There is also a method of laser treatment of the electrode, using UV-pulse laser to heat the electrode surface to activate the electrode, which requires special and more expensive equipment
In addition, there are also reports of electrochemical pretreatment of electrodes, mainly anodizing in different solutions such as phosphate buffer solution, but the activation effect is not satisfactory.

Method used

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Effect test

Embodiment 1

[0024]Soak five screen-printed carbon electrodes in NaOH solution with a concentration of 3mol / L for 0 minutes, 10 minutes, 30 minutes, 60 minutes, and 90 minutes, then take out the electrodes, rinse them with secondary water, and put The processed electrode was used as a working electrode, the reference electrode was a saturated calomel electrode (SCE), and the counter electrode was a platinum sheet electrode. In an electrochemical analyzer CHI832 (Shanghai Chenhua Instrument Co., Ltd.), cyclic voltammetry was used to investigate different treatment times. The response of the screen-printed carbon electrode to potassium ferricyanide is shown in Figure 3. It can be seen from the figure that with the increase of soaking time, the peak potential difference gradually decreases and the response current increases, indicating that The reversibility of the electrode becomes better, and the electron transfer rate is significantly enhanced.

Embodiment 2

[0026] Soak the prepared screen-printed carbon electrode in a NaOH solution with a concentration of 4mol / L for 20 minutes, and then soak the electrode in a NaOH solution with a concentration of 0.5mol / L in an electrochemical analyzer CHI832 (Shanghai Chenhua Instrument company) is activated by a constant potential method, the anode potential applied by the constant potential is set to +1.2V, and the activation time is 20 seconds. Prepare 1×10 -3 mol / L dopamine phosphate buffer solution (pH7.0), using untreated screen-printed carbon electrodes, electrodes soaked in strong alkali solution by chemical treatment, and electrodes treated by combined chemical and electrochemical treatment. The electrode is used as the working electrode, the reference electrode is a saturated calomel electrode (SCE), and the counter electrode is a platinum sheet electrode. In an electrochemical analyzer CHI832 (Shanghai Chenhua Instrument Co., Ltd.), the differential pulse voltammetry was used to inve...

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Abstract

The invention proposes a method for preprocessing screen printing carbon electrodes, which is characterized in that the method comprises a chemical treatment method and a treatment method which combines chemistry and electrochemistry, wherein the chemical treatment method comprises: dipping the screen printing carbon electrodes into strong alkaline solution with high concentration for certain time, while the treatment method which combines the chemistry and the electrochemistry comprises: dipping the screen printing carbon electrodes into strong alkaline solution with high concentration and then activating the electrodes which is dipped with constant potential in alkaline solution with low concentration. Compared with other methods for preprocessing the printing carbon electrodes, the reversibility of electrode and electron transfer rate are prominently intensified after processing by the method for preprocessing which is adopted by the invention, the charge-transfer resistance is greatly reduced, the active area of the electrodes is increased by more than ten times, simultaneously, the response to small biological molecules (such as dopamine) is enlarged by more than thousands of times. The method for preprocessing is simple, operations are convenient, and reagent which is used is very cheap and easy to obtain.

Description

technical field [0001] The invention belongs to the technical field of electrode material and sensor manufacturing, and more specifically relates to a method for pretreatment of a screen-printed carbon electrode. Background technique [0002] Screen printing is a traditional craft in the printing industry with a long history. After the 1960s, it was widely used in the production of electronics industry as the main process of making circuit boards. Nowadays, in the production process of electronics, information and other products, screen printing has become an indispensable process. Whether it is the decoration of the product shell or the production of circuits, thick film integrated circuits, solar cells, resistors, capacitors, piezoelectric elements, photosensitive elements, heat sensitive elements, liquid crystal display elements, etc., the network is used to varying degrees in the production process. printing process. [0003] In recent years, due to the development of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/32B41J15/00
Inventor 孙建军韦航林志彬陈国南
Owner FUZHOU UNIV
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