Mesoporous Silica Embedded Alloy Particles Prevent Metal Release
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Solution Overview
Problem
Existing methods for synthesizing mesoporous silica embedded with metal nanoparticles face challenges such as instability, oxidation of metal particles, aggregation, and release of nanoparticles, which affect their reusability and safety for catalytic applications.
Innovation Solution
The synthesis of mesoporous silica with a core-shell alloy structure, where the core has a higher ionization tendency than the shell, prevents oxidation and ensures stability by embedding metal nanoparticles within the silica pores, using a method that involves oxidation-reduction reactions and sol-gel processes to create a spherical structure with high production yield and cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal nanoparticles are embedded in mesoporous silica using post-treatment methods, then metal can be introduced into the silica structure, but the metal is released during catalyst reuse reducing reusability
Solution Approach 1:
The patent applies preliminary action by incorporating metal ions into the mesoporous silica structure during the synthesis process itself, rather than adding them afterward. The metal ions are embedded in the silica framework before the final catalyst form is achieved, ensuring they remain firmly anchored and preventing release during subsequent reuse cycles.
Solution Approach 2:
The patent utilizes the porous structure of mesoporous silica to embed and stabilize metal ions within the pore network. The porous material provides a structured environment that confines the metal ions, preventing their release while maintaining catalytic activity. The pore structure acts as a physical constraint that holds the metal in place during catalyst operation and reuse.
2Ease of manufacture
If silver nanoparticles are prepared in colloidal form or using plasma, then silver nanoparticles can be synthesized, but the cost increases significantly
Solution Approach 1:
The patent merges the synthesis of mesoporous silica with the incorporation of metal ions into a single integrated process. By combining these two steps that would otherwise be separate (silica synthesis followed by metal deposition), the method eliminates the need for expensive specialized nanoparticle preparation techniques like colloidal synthesis or plasma treatment, significantly reducing production costs.
Solution Approach 2:
The patent applies self-service by allowing the mesoporous silica structure itself to serve as the medium for metal ion incorporation during its formation. The silica synthesis process automatically provides the framework and conditions for metal ion embedding, eliminating the need for separate, costly nanoparticle preparation steps. The system prepares both the support structure and the active metal components in one self-contained process.
3Stability of the object's composition
If metal powder is adsorbed or bonded to another material to enhance dispersibility, then dispersion improves, but metal powder is released during preparation and bonding power deteriorates
Solution Approach 1:
The patent applies local quality by distributing metal ions uniformly throughout the mesoporous silica structure at the molecular level during synthesis. Rather than attempting to bond pre-formed metal powder to the surface, the metal ions are locally incorporated into the silica framework at multiple sites, creating strong localized bonds that prevent release while maintaining excellent dispersion throughout the catalyst structure.
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 enhances the stability and reusability of mesoporous silica, maintains the efficacy of metal nanoparticles, prevents oxidation, and achieves mass production at a lower cost, while ensuring no release of metal nanoparticles and maintaining deodorization and far-infrared emission effects.
Implementation Method 1
the core has a higher ionization tendency than the shell... through an oxidation-reduction reaction with the first metal
Implementation Method 2
using a method that involves oxidation-reduction reactions and sol-gel processes to create a spherical structure
Data Source
AI summary
The present invention relates to mesoporous silica embedded with alloy particles, and a preparation method thereof, and it is possible to prevent the release of metal particles to the outside because the inside of spherical mesoporous silica is embedded with metal nanoparticles, and as the aggregation of the metal is prevented, the stability is excellent and the production yield is high during the preparation process, so that mesoporous silica can be mass-produced, the efficacy of metal nanoparticles may be maintained by preventing the oxidation of metal nanoparticles, and mesoporous silica can be produced at low costs.Further, the inside of pores of mesoporous silica is embedded with metal nanoparticles, so that the discoloration and smell change phenomenon does not occur, and the far-infrared emission and deodorization effects are excellent.