Photocatalytic TiO2 Concrete Treatment for Pollutant Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for reducing nitrogen oxides and volatile organic compounds in concrete structures are costly and inefficient, especially for existing roadbeds, as they require replacing the concrete, which is economically prohibitive and not practical for structurally sound surfaces.
Innovation Solution
The method involves impregnating concrete with a photocatalytic titanium dioxide (TiO2) catalyst using a specialized liquid carrier compound that penetrates to a depth of up to half an inch, creating a self-regenerating pollution-reducing layer that also seals and hardens the concrete, increasing its durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If photocatalytic TiO2 is embedded in concrete to reduce pollutants, then pollution reduction capability is improved, but the cost and complexity of application increase
Solution Approach 1:
A liquid carrier compound is introduced as an intermediary substance to facilitate the embedding of photocatalytic TiO2 into concrete. The carrier compound enables uniform distribution and penetration of TiO2 particles throughout the concrete matrix, simplifying the application process while maintaining effective pollutant reduction capabilities
Solution Approach 2:
The invention changes the physical state and distribution parameters of TiO2 by embedding it within a liquid carrier compound that penetrates the concrete pores. This transformation from dry powder to liquid-suspended particles enables more uniform distribution and deeper penetration into the concrete structure, improving both application ease and pollutant reduction effectiveness
2Object-affected harmful factors
If existing concrete is replaced to install photocatalytic properties, then pollution reduction is achieved, but economic cost increases significantly
Solution Approach 1:
The invention extracts the essential photocatalytic function from the concrete matrix itself and introduces it as a separate embeddable component (TiO2 in liquid carrier). This allows the photocatalytic property to be added to existing concrete without replacing the entire concrete structure, significantly reducing material costs while maintaining structural integrity
Solution Approach 2:
The liquid carrier compound with embedded TiO2 is applied to the concrete surface before the concrete fully cures, allowing the carrier to penetrate deeply into the porous structure. This preliminary action ensures long-lasting pollutant reduction capability without requiring future concrete replacement
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 approach effectively and economically reduces nitrogen oxides and VOCs near their source, maintaining pollution reduction capabilities throughout the concrete structure's lifespan while enhancing its durability against water, chloride, and freeze/thaw damage.
Implementation Method 1
reacts with nitrogen oxides and other pollutants to chemically alter them into non-hazardous or less hazardous materials through photocatalytic oxidation (PCO)
Implementation Method 2
through photocatalytic oxidation (PCO) and/or reduction reaction
Implementation Method 3
the carrier liquid is capable of penetrating concrete down to a depth of at least an eighth of an inch relative to an upper surface of the concrete
Data Source
AI summary
Methods for embedding photocatalytic titanium dioxide in concrete surfaces to reduce pollutants via photocatalytic reactions are provided herein. One method includes applying an amount of concrete treatment compound to an upper surface of the concrete, the concrete treatment compound comprising a mixture of a liquid carrier compound with a titanium dioxide (TiO2) photocatalyst.