Water treatment composite electrode based on metal-based fiber material

Abstract

The embodiment of the invention provides a water treatment composite electrode based on a metal-based fiber material. The water treatment composite electrode comprises a metal fiber matrix, a micro-nano configuration metal surface layer, a metal oxide catalyst layer and a surface modification layer, wherein the micro-nano configuration metal surface layer is a metal surface layer which grows on the metal fiber matrix and has a micro-nano morphology of a micro column, a micro wire, a micro rod, a nano rod or a nano wire array; the metal oxide catalyst layer is a metal oxide array which grows in situ on the micro-nano-configuration metal surface layer and has a nanowire, nanorod or nano-cone appearance; and the surface modification layer is a super-hydrophobic coating or a conductive coating loaded on the metal oxide catalyst layer. According to the invention, surface-to-body ratio is high, the surface area is high, the effective area under a unit mass electrode (the specific electrode mass active area) is large; due to the special micro-nano interface characteristic and the open structure of the fiber electrode, the water treatment electrode is suitable for different water treatment scenes, and meanwhile, the water treatment electrode has the advantages of being high in oxidation capacity, excellent in mass transfer performance, long in service life, easy to machine and low in energy consumption.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a composite electrode for water treatment based on a metal-based fiber material. Background technique [0002] In recent years, electrocatalytic technology has received extensive attention in the field of water treatment. There have been decades of development in the field of water treatment electrode preparation, and many achievements have been made. At present, the electrode materials used in actual water treatment projects are mainly titanium-based shape-stable (DSA) electrodes, and the electrode forms are mainly plate-shaped, mesh-shaped, cylindrical, etc. electrode material. This type of electrode can be processed into electrode assemblies of different sizes according to a certain distance for wastewater treatment. However, the effect of water treatment is generally positively related to the surface-to-body ratio of the electrode arrangement in the electrolysis de...

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Problems solved by technology

[0003] In previous studies, in the field of microbial fuel cells, it has been proposed to use graphite fibers as electrode materials. The voltage range of this electrode material used in microbial fuel cells is within 2V of the withstand voltage of biological systems, but it is used in the field of water treatment. High operating voltage to obtain higher yield of hydroxyl radicals, the stability and catalytic properties of the above carbon-based materials are not suitable for practical water treatment systems

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