Titanium-organic framework photocatalyst for adsorption and decomposition of volatile organic compound, manufacturing method thereof and method for removing volatile organic compound using titanium-organic framework
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Solution Overview
Problem
Existing metal-organic frameworks (MOFs) have limited pore size distribution and require complex post-treatment processes, hindering their effectiveness in adsorption and decomposition of volatile organic compounds due to intrinsic microporous nature and random variation in nucleation rates.
Innovation Solution
A titanium-organic framework photocatalyst is prepared by mixing two carboxylic acid compounds with different electronegativity as organic linkers at an optimized ratio, forming a hierarchical pore structure through competitive coordination bonding, which enhances mass diffusion and charge separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional MOF synthesis methods are used to control pore size through crystal growth phase or topology structure designing, then pore size distribution can be tuned, but the process becomes complex requiring additional post-treatment processes such as template removal, acid etching and high-temperature annealing
Solution Approach 1:
The patent applies preliminary action by controlling the nucleation rate during the initial synthesis phase through organic linker selection. By pre-determining the nucleation behavior of different organic linkers with metal ions, the hierarchical pore structure is formed directly during crystal nucleation without requiring subsequent post-treatment processes for template removal or acid etching.
Solution Approach 2:
The patent utilizes parameter changes by varying the organic linker type and its concentration to control nucleation rate. Different organic linkers exhibit different nucleation rates with metal ions, and by adjusting these parameters during synthesis, the desired hierarchical pore structure is achieved without complex post-processing.
2Stability of the object's composition
If intrinsic microporous nature of MOFs is maintained, then framework stability is preserved, but mass diffusion dynamics and accessibility of active sites are significantly limited
Solution Approach 1:
The patent applies segmentation by creating a hierarchical pore structure that divides the pore space into multiple levels and scales. This segmentation allows different regions of the framework to serve different functions: maintaining structural stability in certain zones while providing enhanced mass diffusion pathways in others, thus resolving the contradiction between framework stability and mass diffusion rate.
Solution Approach 2:
The patent introduces another dimension by transitioning from a uniform microporous structure to a hierarchical pore structure with multiple pore size distributions. This dimensional change in pore architecture enables simultaneous preservation of framework stability and improvement of mass diffusion dynamics through multi-scale pore pathways.
3Ease of manufacture
If random variation in nucleation rates is accepted in conventional MOF synthesis, then synthesis simplicity is maintained, but pore size distribution control becomes limited and unpredictable
Solution Approach 1:
The patent applies parameter changes by systematically varying the organic linker type and concentration to control nucleation rate. This approach transforms the random variation in nucleation into a controllable parameter, enabling precise prediction and control of pore size distribution while maintaining synthesis simplicity through direct one-pot synthesis without complex post-treatments.
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 titanium-organic framework exhibits improved adsorption and decomposition efficiency of volatile organic compounds, with enhanced photocatalytic degradation rates and superior charge separation capability.
Implementation Method 1
a titanium-organic framework photocatalyst for adsorption and decomposition of a volatile organic compound
Implementation Method 2
decomposing the volatile organic compound adsorbed on the photocatalyst by irradiating light to the photocatalyst with the volatile organic compound adsorbed
Data Source
AI summary
The present disclosure relates to a titanium-organic framework photocatalyst for adsorption and decomposition of a volatile organic compound, a method for preparing the same and a method for removing a volatile organic compound using a titanium-organic framework photocatalyst. More specifically, a hierarchical pore structure can be formed and a pore size can be controlled by preparing a titanium-organic framework photocatalyst by coordination bonding a titanium precursor to a mixture of two carboxylic acid compounds having different electronegativity, as organic linkers, at an optimized ratio. The titanium-organic framework photocatalyst exhibits improved efficiency of adsorbing and decomposing a volatile organic compound (VOC) and can improve the photocatalytic degradation rate of the volatile organic compound (VOC).