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Preparation method of modified carbon paste electrode based on covalent organic framework material

A technology of covalent organic framework and carbon paste electrode is applied in the fields of electrochemical variables of materials, analysis of materials, and material analysis by electromagnetic means. Good, high sensitivity, improve the effect of current response

Active Publication Date: 2018-08-14
YANGZHOU UNIV
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Problems solved by technology

[0003] At present, some analytical methods such as atomic absorption spectrometry, atomic emission spectrometry, inductively coupled plasma spectrometry and gas chromatography are used to detect the content of lead. Although these methods have the advantages of high sensitivity and good selectivity, these methods There are cumbersome pretreatment procedures, time-consuming, and high cost disadvantages. Compared with the above methods, electrochemical techniques have the advantages of simple preparation, low cost, and rapid detection, and have been reported for the detection of various chemical and biological species.

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  • Preparation method of modified carbon paste electrode based on covalent organic framework material
  • Preparation method of modified carbon paste electrode based on covalent organic framework material
  • Preparation method of modified carbon paste electrode based on covalent organic framework material

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Embodiment Construction

[0022] 1. Preparation of modified carbon paste electrodes based on covalent organic framework materials:

[0023] 1. Preparation of TAPB-DMTP-COF:

[0024] At room temperature, weigh out 10.5 mg 1,3,5-tris(4-aminophenylbenzene) and 8.5 mg 2,5-dimethoxyterephthalaldehyde monomer and dissolve in 4.5 mL 1,4-dioxane In the co-solution of cyclo, n-butanol and methanol (4:4:1 v / v / v), after ultrasonic for half an hour to dissolve the monomer, slowly add 0.05 mL of acetic acid, react at room temperature for 2 hours, and continue to add 0.45 mL of acetic acid. Put it in a 70℃ oven to react for 24h. The obtained precipitate was washed with tetrahydrofuran and acetone, and finally dried under vacuum for 24 hours to obtain a yellow solid, namely TAPB-DMTP-COF.

[0025] The X-ray powder diffraction pattern of the yellow solid is shown in figure 1 . figure 1 Curve 1 in the figure represents the theoretically fitted XRD, and curve 2 represents the experimentally derived XRD. It can be seen from ...

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Abstract

The invention provides a preparation method of a modified carbon paste electrode based on a covalent organic framework material and relates to the technical field of electrochemical sensors. The preparation method comprises the following steps: dissolving 1,3,5-tri(4-aminophenylbenzene) and 2,5-dimethoxyterephthalaldehyde into a solvent; reacting under the catalysis of acetic acid to obtain TAPB-DMTP-COF (Tert-Amylperoxybenzoate-Methanol To Propylene-Covalent Organic Framework); then mixing the TAPB-DMTP-COF and graphite powder and grinding; then blending paraffin oil to obtain a mixed material; then pressing the mixed material into a polytetrafluoroethylene pipe and inserting a lead wire to prepare the modified carbon paste electrode based on the covalent organic framework material. According to the preparation method provided by the invention, the electrochemical sensor is constructed to detect lead, and the carbon paste electrode is modified through the TAPB-DMTP-COF so that the current response on the lead is improved.

Description

Technical field [0001] The invention relates to the technical field of electrochemical sensors, in particular to a method for preparing a TAPB-DMTP-COF modified carbon paste electrode, and uses the modified electrode to detect lead using differential pulse stripping voltammetry. Background technique [0002] Lead is a heavy metal that is extremely harmful to the human body. It is widely distributed in the atmosphere, water, soil, and organisms. It can accumulate in the human body through the food chain, thereby affecting human health. Because metallic lead is not easily degraded and highly neurotoxic, long-term exposure to high concentrations of lead can cause nervous system damage, brain damage, anemia, reproductive system disorders, kidney failure, etc. It cannot be ignored that lead can make children mentally retarded and affect their healthy growth. Therefore, it is of great significance to develop a fast and sensitive analytical method for quantitative detection of lead. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/48
CPCG01N27/308G01N27/48
Inventor 王洋张婷
Owner YANGZHOU UNIV
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