Metallic Article Singlet Oxygen Production
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Solution Overview
Problem
Current methods for producing singlet oxygen in atmospheric air, such as using immobilized photosensitizers, suffer from reduced yield and limited lifespan due to photobleaching, and require irradiation, which is inefficient.
Innovation Solution
A non-irradiative method involving a metallic article, preferably a honeycomb-shaped metal plate with holes, is used to convert oxygen from its triplet state to the highly reactive singlet state by passing oxygen-rich gas through or over the metal, achieving a yield of 8-12% singlet oxygen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If immobilized photosensitizers are used to produce singlet oxygen in atmospheric air, then singlet oxygen can be generated, but the yield is reduced and the lifespan is limited due to photobleaching
Solution Approach 1:
The patent extracts and removes the photosensitizer component from the system, replacing it with a metallic article that can directly catalyze singlet oxygen formation without requiring light activation. This eliminates the photobleaching problem that limits photosensitizer lifespan while maintaining singlet oxygen production capability.
Solution Approach 2:
The patent replaces the photochemical mechanism (irradiation-dependent photosensitizer activation) with a mechanical/catalytic mechanism (metal surface interaction). By passing oxygen-containing gas through or over the metallic article, singlet oxygen is generated through direct metal-oxygen interaction, eliminating the need for light irradiation and photosensitizers.
2Productivity
If photosensitizers are used for singlet oxygen production, then singlet oxygen can be generated, but irradiation is required which reduces efficiency
Solution Approach 1:
The patent replaces the photochemical activation process with a catalytic process using metallic articles. Instead of requiring external light irradiation to activate photosensitizers, the system uses direct contact between oxygen-containing gas and the metal surface to generate singlet oxygen, thereby eliminating the need for irradiation energy input.
Solution Approach 2:
The metallic article serves as a self-sustaining catalyst that continuously converts triplet oxygen to singlet oxygen through direct gas-phase interaction without requiring external energy input like light irradiation. The metal surface itself provides the catalytic function, making the system self-service and eliminating dependency on external irradiation sources.
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
This method effectively produces short-lived, highly reactive singlet oxygen without the need for photosensitizers or irradiation, enhancing combustion efficiency and providing a cleaner burn process, while also being applicable for medical and industrial treatments.
Implementation Method 1
The direct conversion of an isolated oxygen molecule from the ground triplet state to the singlet state by the absorption of a photon is highly improbable as it is a spin forbidden transition
Implementation Method 2
passing a gas comprising oxygen through or over a perforated metallic article
Data Source
AI summary
A non-irradiative method for producing singlet oxygen is provided that comprises passing a gas comprising oxygen through or over a perforated metallic article. A method of oxidizing a target of treatment is also described that comprises providing a metallic article and convecting a gas comprising oxygen over or through the article toward the target.