Composite electrode for water treatment based on metal-based fiber material

Abstract

An embodiment of the present invention provides a composite electrode for water treatment based on a metal-based fiber material, comprising: a metal fiber matrix, a micro-nano configuration metal surface layer, a metal oxide catalyst layer and a surface modification layer; the micro-nano configuration metal surface layer is A metal surface layer with micro-nano morphology of micro-columns, micro-wires, micro-rods, nano-rods or nano-wire arrays grown on a metal fiber substrate; the metal oxide catalytic layer is an in-situ growth on the micro-nano configuration metal surface with A metal oxide array with nanowire, nanorod or nanocone morphology; the surface modification layer is a superhydrophobic coating or a conductive coating supported on the metal oxide catalytic layer. The invention has high surface area ratio, high surface area, high effective area under unit mass electrode (specific electrode mass active area), and is suitable for different water treatment scenarios due to the special micro-nano interface characteristics and the open structure of the fiber electrode, and has strong oxidizing ability at the same time. , excellent mass transfer performance, long service life, easy processing, low 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 electrode preparation for water treatment, and many achievements have been achieved. At present, the electrode materials used in actual water treatment projects are mainly titanium-based dimensionally stable (DSA) electrodes, and the forms of electrodes are mainly in the form of plate, mesh, and cylinder. shape electrode material. This type of electrode can be processed into electrode assemblies of different sizes according to a certain spacing for wastewater treatment. However, the effect of water treatment is generally positively related to the area ratio of the electrode arrangement in the elec...

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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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