Cu2O Spherical Assembly Particle Composition
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Solution Overview
Problem
Existing methods for preparing Cu2O particles fail to achieve uniformity and workability while maintaining the inherent properties of ultrafine particles, often resulting in irregular shapes and sizes due to rapid reduction reactions or lack of agglomeration.
Innovation Solution
A Cu2O spherical assembly particle composition is formed by agglomerating ultrafine particles with controlled diameters (1-100 nm) using a weak reducing agent and surfactants like polyacrylamide, resulting in particles with uniform sizes (0.1-10 μm) and improved workability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If strong reducing agents are used to prepare Cu2O particles, then the reduction reaction proceeds rapidly, but the particle size increases rapidly and becomes irregular
Solution Approach 1:
The patent introduces a weak reducing agent as an intermediary substance to mediate the reduction reaction. This weak reducing agent enables the reaction to proceed at a controlled, moderate pace rather than rapidly, allowing for uniform particle formation. The intermediary agent bridges the gap between needing efficient reduction and maintaining particle size control.
Solution Approach 2:
The patent changes the key parameter of reducing agent strength from strong to weak. This parameter change fundamentally alters the reaction kinetics, slowing down the reduction process to enable controlled particle growth and uniform size distribution while still achieving complete reduction of copper precursors.
2Reliability
If Cu2O ultrafine particles are used to maximize surface area and activation, then the inherent properties are enhanced, but the workability deteriorates
Solution Approach 1:
The patent segments the particle system into two levels: ultrafine primary particles (1-100 nm) that provide high surface area and activation, and larger assembly particles (0.1-10 μm) that provide workability. The ultrafine particles are clustered into groups to form assembly particles, allowing both size regimes to coexist and fulfill their respective functions.
Solution Approach 2:
The patent implements a nested structure where multiple ultrafine particles (1-100 nm) are nested together to form larger assembly particles (0.1-10 μm). This nested arrangement allows the inner ultrafine particles to maintain their high surface area and reactivity while the outer assembly structure provides ease of handling and processing.
3Ease of manufacture
If simple Cu2O particles with low density are formed, then the preparation is simplified, but the uniformity and workability are not satisfied
Solution Approach 1:
The patent merges multiple ultrafine particles into assembly particles through controlled aggregation. This merging process transforms simple, uniform ultrafine particles into structured assembly particles with controlled size distribution and improved workability, while maintaining the simplicity of the chemical preparation method.
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 method produces Cu2O particles with enhanced uniformity and workability, maintaining low fusion temperatures and increased surface area, suitable for applications in solar energy conversion, magnetic storage, catalysts, and copper wire formation.
Implementation Method 1
putting a weak reducing agent having a standard reduction potential in the range from -0.2 to -0.05V into the Cu2O precursor solution to form Cu2O spherical assembly particles
Implementation Method 2
the Cu2O spherical assembly particles may be coated with a surfactant. Particularly, the surfactant may be polyacrylamide
Implementation Method 3
each of which is formed by agglomerating a plurality of Cu2O ultrafine particles
Data Source
AI summary
A Cu2O spherical assembly particle composition is composed of Cu2O spherical assembly particles, each of which is formed by agglomerating a plurality of Cu2O ultrafine particles that have an average diameter in the range from 1 to 100 nm and a standard deviation on the diameter in the range from 0 to 10%. The Cu2O spherical assembly particles have an average diameter in the range from 0.1 to 10 μm and a standard deviation on the diameter in the range from 0 to 40%. This Cu2O spherical assembly particle composition is composed of Cu2O assembly particles with excellent uniformity, so it shows excellent properties such as realizing a good electric conductivity during a curing process for wiring. Accordingly, the spherical Cu2O assembly particle composition may be usefully used as precursors for solar energy conversion, magnetic storage medium, catalyst, gas sensor, and copper wire formation.