Single Crystal Zinc Oxide Nanoparticle Production via Liquid-Phase Acid-Base Reaction
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Solution Overview
Problem
Current methods for producing single crystalline zinc oxide nanoparticles are inefficient for mass production due to high energy requirements and yield limitations, with existing gas-phase methods producing aggregated particles and requiring costly high-energy systems, while liquid-phase methods struggle with stable crystal formation.
Innovation Solution
A method involving the mixing of a zinc oxide separating solvent, prepared by homogeneously mixing an acidic substance with a solvent containing alcohol, with a zinc oxide raw material solution between rotating processing surfaces to generate single crystalline zinc oxide nanoparticles through an acid-base reaction, controlling the single crystal ratio and pH to achieve stable production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If gas-phase methods are used to produce single crystalline zinc oxide nanoparticles, then single crystal characteristics are achieved, but production cost increases and productivity decreases due to high energy requirements and low yield
Solution Approach 1:
The invention changes the fundamental parameter of the reaction phase from gas-phase to liquid-phase, enabling single crystalline zinc oxide nanoparticle production without high-energy systems. The liquid-phase acid-base reaction between zinc salt solution and base solution achieves single crystal formation at lower energy input, resolving the contradiction between manufacturing precision and productivity
Solution Approach 2:
The invention replaces the mechanical/thermal energy systems (electron beam, plasma, laser, induction heating) with a chemical reaction system. The acid-base reaction in liquid phase substitutes for the high-energy physical fields, achieving the same single crystal formation goal with much lower energy consumption and higher production efficiency
2Manufacturing precision
If gas-phase methods are used to produce zinc oxide nanoparticles, then single crystals are formed, but particle aggregation occurs and particle size uniformity deteriorates
Solution Approach 1:
Changing from gas-phase to liquid-phase reaction prevents particle aggregation. In liquid phase, the acid-base reaction occurs in solution where particles form and remain dispersed, avoiding the aggregation and fusion problems that occur in gas-phase methods. This maintains both single crystal formation and particle size uniformity
3Productivity
If liquid-phase methods are used to produce zinc oxide nanoparticles, then production efficiency improves, but stable single crystal formation is difficult to achieve
Solution Approach 1:
The invention optimizes liquid-phase reaction parameters by using acid-base reaction between zinc salt solution and base solution, controlling pH, temperature, and concentration to achieve stable single crystal formation. This resolves the previous liquid-phase problem of unstable crystal formation while maintaining high productivity
Solution Approach 2:
The invention prepares solutions with predetermined compositions and pH values before mixing. The zinc salt solution and base solution are prepared in advance with controlled concentrations, ensuring that when mixed, they reliably produce single crystalline nanoparticles with consistent properties, achieving stable single crystal formation in liquid-phase
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 method enables stable production of single crystalline zinc oxide nanoparticles without high-energy systems, achieving high yields and controlled crystal formation, suitable for mass production with improved particle uniformity and size consistency.
Implementation Method 1
zinc oxide nanoparticles are generated by an acid-base reaction due to mixing of the acidic substance and the raw material solution
Implementation Method 2
forming a forced thin film of two kinds or more of fluids to be processed between processing surfaces arranged so as to be able to approach and separate from each other and rotate relative to each other
Data Source
Figure 1~2
Figure 3
Figure 4(A)~4(B)
AI summary
The purpose of the present invention is to stably provide a method for producing single crystalline zinc oxide nanoparticles that is capable of mass production. The method is for producing single crystalline zinc oxide nanoparticles comprising mixing, between processing surfaces which are disposed in a position facing each other so as to be able to approach and separate from each other and rotate relative to each other, a zinc oxide separating solvent prepared by homogeneously mixing an acidic substance with a solvent containing at least alcohol and a raw material solution obtained by mixing a zinc oxide nanoparticle raw material with a basic solvent or a raw material solution that is basic as a result of mixing and dissolving a zinc oxide nanoparticle raw material with and into a solvent, and discharging a mixed fluid in which zinc oxide nanoparticles have separated out from between the processing surfaces. The zinc oxide separating solvent and the raw material solution are mixed between the processing surfaces so that the mixed fluid becomes basic, and zinc oxide nanoparticles are generated by an acid-base reaction due to mixing of the acidic substance and the basic solvent.