Boron-Compound Stabilization of Cerium Oxide Nanoparticles
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Solution Overview
Problem
Conventional cerium oxide nanoparticles with surface modifications using stabilizing agents like polyacrylic acid or boric acid exhibit low oxidative degradation rates, limiting their effectiveness as antibacterial and antivirus agents.
Innovation Solution
The production of cerium oxide nanoparticles involves adding an oxidant to a solution containing a boron compound represented by the general formula BR n (OR') 3-n and cerium (III) ions, with specific pH conditions and boron content, enhancing oxidative performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional stabilizing agents like polyacrylic acid or boric acid are used to disperse cerium oxide nanoparticles, then the nanoparticles can be stably dispersed, but the oxidative degradation rate is low
Solution Approach 1:
The patent changes the chemical composition parameters of the stabilizing agent by using a boron compound with specific molecular structure (formula BRn(OR')3-n) instead of conventional agents like polyacrylic acid. This parameter change in the stabilizing agent's chemical structure resolves the contradiction by providing both dispersion stability and high oxidative degradation rate simultaneously.
Solution Approach 2:
The patent creates a composite system where cerium oxide nanoparticles are combined with specific boron compounds (boric acid, boric acid esters, boronic acids, or borate salts) as stabilizing agents. This composite approach allows the system to achieve both stable dispersion and high oxidative performance that neither component could achieve alone.
2Adaptability or versatility
If cerium oxide nanoparticles are used as oxidants without special light sources, then they can decompose harmful substances in indoor and dark places, but the oxidative performance is insufficient compared to titanium dioxide
Solution Approach 1:
The patent changes the surface chemical environment of cerium oxide nanoparticles by introducing specific boron compounds as stabilizing agents. This parameter change in the surface chemistry enhances the oxidative degradation rate while maintaining the ability to function without special light sources, thus resolving the contradiction between adaptability and productivity.
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 resulting nanoparticles demonstrate higher oxidative degradation rates, making them effective as high-performance antivirus and antibacterial agents.
Implementation Method 1
a particle dispersion solution is obtained by oxidizing a cerium (III) ion with hydrogen peroxide using polyacrylic acid as a stabilizing agent
Implementation Method 2
a particle dispersion solution is obtained by oxidizing a cerium (III) ion with hydrogen peroxide
Implementation Method 3
a cerium oxide nanoparticle (nanoceria) has catalytic activities similar to those of oxidative enzymes such as an oxidase and a peroxidase
Implementation Method 4
the oxidative degradation characteristics like this is expected to be used, besides the use as an antibacterial agent, also for degradation of low-molecular weight substances such as acetaldehyde and ammonia
Data Source
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AI summary
The present invention has an object to provide a cerium oxide nanoparticle or a dispersion solution containing the cerium oxide nanoparticle, these having high oxidative, antivirus, and antibacterial performances. The present invention provides a cerium oxide nanoparticle produced by adding an oxidant to a solution containing a boron compound represented by the following general formula (I) and a cerium (III) ion. BRn(OR')3-n (I) In formula (I), n represents an integer of 0 to 2, R represents any of an alkyl group having 1 to 4 carbon atoms, a phenyl group, and a tolyl group, and R' represents any of a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a phenyl group, and a tolyl group. When a plurality of Rs or of R's are present, the plurality of Rs or of R's may be the same or different.