Ozone Generating Electrode Heterojunction Coating for Water Treatment
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Solution Overview
Problem
Existing electrochemical ozone production (EOP) electrodes have low ozone production efficiency and poor stability, making them unsuitable for practical water treatment applications.
Innovation Solution
An ozone generating electrode comprising a support with a catalyst layer and a coating layer, where the catalyst layer contains metal oxides like silicon oxide, titanium oxide, and the coating layer forms a heterojunction with the catalyst layer, enhancing ozone production efficiency and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional cold corona discharge (CCD) technology is used to produce ozone, then ozone can be generated in gaseous form, but it requires strong voltage, complex facilities using dry oxygen gas, and has limitations in increasing ozone concentration in water
Solution Approach 1:
The patent replaces the mechanical/electrical CCD system with an electrochemical system using an oxidation electrode. Instead of using strong voltage and complex gas handling facilities, the invention uses electrochemical oxidation of water on the electrode surface to generate ozone directly in water, substituting a simpler electrochemical process for the complex mechanical CCD system
Solution Approach 2:
The patent changes the fundamental operating parameters from gas-phase electrical discharge to water-phase electrochemical oxidation. By changing the phase (from gas to water), the operating conditions (from strong voltage to moderate electrochemical potential), and the reactant state (from dry oxygen gas to liquid water), the system achieves ozone generation without complex facilities
2Productivity
If existing electrochemical ozone production (EOP) oxidation electrode is used, then ozone can be produced through electrolysis in water system, but the electrode has low ozone production efficiency and poor stability
Solution Approach 1:
The patent employs a composite electrode structure consisting of a conductive substrate combined with a metal oxide catalyst layer. This composite material approach combines the electrical conductivity of the substrate with the catalytic activity of metal oxides (such as MnO2, Fe2O3, Fe3O4, or CuO), achieving both high ozone production efficiency and long-term operational stability
Solution Approach 2:
The patent uses metal oxide catalysts that accelerate the oxidation of water to generate ozone. The metal oxides act as strong oxidizing catalysts, lowering the activation energy required for water oxidation and enabling efficient ozone generation at moderate potentials, thereby improving both productivity and stability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The electrode achieves several times higher ozone production efficiency and increased stability, effectively decomposing contaminants in water treatment, reducing electrode replacement cycles and operational costs.
Implementation Method 1
the catalyst layer and the coating layer may form a heterojunction therebetween
Implementation Method 2
The EOP technology produces ozone by oxidizing water (H2O) represented by Equation 1. 3H2O→O3+6H++6e−
Implementation Method 3
the tin oxide may be doped with a dopant including at least one selected from the group consisting of nickel (Ni) and antimony (Sb)
Data Source
AI summary
Proposed are an ozone generating electrode, a method of manufacturing the same, and a method of producing ozone using the same. The ozone generating electrode includes a support including a metal, a catalyst layer positioned on one surface or both surfaces of the support, and a coating layer positioned on the catalyst layer and including a metal oxide. The ozone generating electrode is energy efficient, stable, and provides a high concentration of ozone to a water system. In addition, when water treatment is performed with the ozone generating electrode of the present invention, it is possible to more effectively decompose pollutants during water treatment and to reduce the electrode replacement cycle, thereby reducing water treatment operation time and cost.