Plasmonic Photoelectrochemical Face Mask for Contaminant Oxidation
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Solution Overview
Problem
Existing breathing systems, including disposable masks and gas masks with filters, fail to effectively remove a wide range of harmful air contaminants, such as viruses and volatile organic compounds, and often require expensive and bulky air tanks or frequent filter changes for adequate protection.
Innovation Solution
A portable plasmonic photoelectrochemical oxidation breathing system that uses a plasmonic device with a source of photons and nanostructures coated with noble metal nanoparticles to oxidize harmful contaminants in the air, providing a filtered gas for respiration without the need for dedicated air tanks or frequent filter changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If disposable face masks are used, then they provide basic pathogen protection, but they fail to effectively remove harmful contaminants like volatile organic compounds and smaller viruses
Solution Approach 1:
The patent changes the chemical and physical parameters of the mask material by incorporating photocatalytic particles (such as titanium dioxide) and plasmonic particles (such as silver or gold nanoparticles) into the filter layer. These particles enable photoelectrochemical oxidation reactions when exposed to light, fundamentally altering the mask's ability to degrade contaminants rather than merely filter them physically.
Solution Approach 2:
The mask employs a composite structure combining multiple functional materials: base filter material, photocatalytic particles, plasmonic particles, and potentially other functional layers. This composite approach integrates mechanical filtration with photoactivated chemical degradation, enabling simultaneous removal of particles, viruses, and volatile organic compounds that single-material masks cannot address.
2Object-affected harmful factors
If gas masks with filters are used, then they provide better protection against some contaminants, but they require routine filter changes and do not protect against all contaminants
Solution Approach 1:
The photoelectrochemical oxidation system enables the mask to self-regenerate and self-clean. The photocatalytic and plasmonic particles continuously degrade organic contaminants and can be reactivated by light exposure, allowing the filter material to restore its functionality without human intervention. This eliminates or significantly reduces the need for routine filter changes.
Solution Approach 2:
Instead of discarding saturated filters, the system recovers filter performance through photoactivation. The photocatalytic particles, after degrading contaminants, can be regenerated by exposure to UV or visible light, which reactivates their catalytic surfaces. This recovery mechanism extends filter life and maintains protection effectiveness without requiring replacement.
3Reliability
If respirators with compressed air or oxygen tanks are used, then they ensure complete safety, but they are costly and require routine filling
Solution Approach 1:
The patent extracts and eliminates the need for bulky air tanks and complex compression systems by implementing a passive photoelectrochemical oxidation layer within the mask itself. The contaminant removal function is integrated directly into the filter material, separating this function from the breathing air supply system and eliminating the need for external air storage and compression equipment.
Solution Approach 2:
The photocatalytic and plasmonic particles serve as intermediary agents that facilitate contaminant degradation without requiring direct contact with external energy sources or complex systems. These particles absorb light energy and transfer it to contaminants, mediating the destruction of harmful substances through photoactivated chemical reactions rather than mechanical or thermal processes.
4Duration of action of moving object
If respirators with air tanks are used, then they provide complete protection, but the user can only use them as long as air remains in the tank
Solution Approach 1:
The photoelectrochemical oxidation system enables continuous contaminant degradation as long as light is available. The photocatalytic particles remain active and continuously break down contaminants passing through the mask, providing uninterrupted protection without the finite duration limitation of tank-based systems. The process is sustained by ambient light rather than depletable stored air.
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 system effectively removes harmful air contaminants, providing clean and filtered air for respiration while being portable and cost-effective, without the need for routine filter changes or bulky air tanks, thus enhancing personal protection against a broader range of air-borne hazards.
Implementation Method 1
A portable plasmonic photoelectrochemical oxidation breathing system that uses a plasmonic device with a source of photons and nanostructures coated with noble metal nanoparticles to oxidize harmful contaminants in the air
Implementation Method 2
The internal compartment of the plasmonic device includes a source of photons having a wavelength
Implementation Method 3
the harmful contaminants are oxidized, thereby turning the harmful gas into a filtered gas
Implementation Method 4
to prevent the oxidation of the plasmonic layer and increase the efficiency of the overall system, a thin protective layer of a material is deposited onto the plasmonic layer
Data Source
AI summary
A breathing system for removing harmful contaminants, such as microbes and volatile organic compounds, is provided. The breathing system includes a face mask, an inhalation limb, and a plasmonic device. As a contaminated gas flows through an internal chamber of the plasmonic device, the contaminates are oxidized. Specifically, the internal chamber includes a source of photons spaced apart from the nanostructure. The nanostructure is coated in a plasmonic layer, including noble metal nanoparticles. The plasmonic layer is protected from oxidation through a photocatalyst layer disposed thereon.