A method and application of polypyrrole-multi-walled carbon nanotubes synergistically modifying palladium-loaded composite electrodes

Abstract

The invention relates to a preparation method and an application of a polypyrrole-multiwalled carbon nanotube collaboratively-modified palladium-carried composite electrode and belongs to the technical field of electrochemical water treatment. The method comprises the following steps of: firstly ultrasonically dispersing carbon nanotubes after being pretreated into a volatile organic solvent to form carbon nanotube suspension liquid, soaking and lifting a Ti (titanium) net in the suspension liquid, and naturally drying the Ti net to ensure that the carbon nanotubes are dispersed on the surface of the Ti net; carrying out the electrochemical oxidization polymerization in a Py (polypyrrole) sulfuric acid solution to form polypyrrole, so as to obtain a polypyrrole-multiwalled nanotube modified membrane; finally electrically depositing Pd (palladium) in a PdCl2 solution to obtain the polypyrrole-multiwalled carbon nanotube-modified Pd-carried composite electrode. The electrode is used for electrically catalyzing and reducing chloride of chlorophenol in the water. Compared with a Pd / Ti electrode with no modified layer, the research shows that the electrode can rapidly and high-efficiently remove 2, 4-dichlorophen and pentachlorophenol and has universality. The prepared electrode is high in catalytic activity, good in stability, rapid and high-efficient for electrically catalyzing the chlorophenol in the water and promising in application prospect.

Description

technical field [0001] The invention relates to a method for preparing a composite electrode for electrocatalytic reduction and dechlorination of chlorophenols in water. Polypyrrole-multi-wall carbon nanotube synergistic modification is used to improve the catalytic activity and stability of the electrode, which belongs to the electrochemical water treatment technology field. Background technique [0002] Chlorophenol pollutants are a typical class of persistent organic pollutants, which can be used as raw materials or intermediates for dyes, pesticides and organic synthesis; the World Health Organization officially recognizes 2,4,6-trichlorophenol, 2,4, 5-trichlorophenol, pentachlorophenol, etc. are suspected carcinogenic compounds. Most chlorophenols are highly toxic, difficult to biodegrade, have "three causes" (carcinogenic, teratogenic, mutagenic) effects and genotoxicity, remain in the environment for a long time, have a long degradation cycle, and are difficult to re...

AI Technical Summary

Problems solved by technology

The present invention aims at dechlorination by electrocatalytic reduction, and prepares a composite electrode with large specific surface area and high catalytic reduction activity, which is used for electrocatalytic reduction of chlorophenol, and can improve the instability of the matrix existing in the modified electrode for dechlorination , Catalysts and substrates are easy to detach, low catalytic activity and other shortcomings, creative

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