Indium Oxide Morphology Stabilization via Bismuth Mediator
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Solution Overview
Problem
Current methods for preparing indium oxide with specific structure and morphology face challenges in achieving industrial scalability, thermal stability, and maintaining morphology at high temperatures, limiting its application in various environments.
Innovation Solution
A method involving mixing indium oxide powder with bismuth oxide at a specific ratio, followed by ball milling and calcination at 700-1000°C, results in indium oxide with stable cubic morphology, which can be applied to electrochemical sensors, maintaining stability even at high temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If chemical vapor deposition method is used to synthesize nano indium oxide with different morphologies, then the morphology and properties are excellent, but the equipment complexity and difficulty of parameter adjustment increase significantly
Solution Approach 1:
The patent introduces bismuth oxide as an intermediary substance to mediate the formation of indium oxide morphology. By mixing indium oxide powder with bismuth oxide powder in specific ratios and undergoing ball milling and calcination, the bismuth oxide facilitates the formation of stable cubic morphology without requiring complex deposition equipment or parameter adjustments
Solution Approach 2:
The patent changes the chemical composition parameters by introducing bismuth oxide at controlled ratios (0.1-0.5 mass ratio) and adjusts processing parameters such as ball milling time (2-24 hours) and calcination temperature (700-1000°C) to achieve the desired cubic morphology with high thermal stability
2Ease of manufacture
If liquid phase method is used for preparation, then the process is simpler, but the process time and equipment consumption increase
Solution Approach 1:
The patent replaces the liquid phase chemical reaction system with a solid-state mechanical mixing and thermal treatment system. By using ball milling to uniformly mix powders followed by calcination, the process eliminates lengthy liquid phase reactions while maintaining simplicity and reducing overall processing time
3Reliability
If indium oxide with special structure and morphology is prepared, then the catalytic activity and sensor performance are enhanced, but the thermal stability decreases and morphology changes above 300°C
Solution Approach 1:
The patent creates a composite system by combining indium oxide with bismuth oxide during the calcination process. This composite formation results in indium oxide with a stable cubic morphology that maintains its structural integrity and catalytic properties at high temperatures up to 1000°C, unlike conventional indium oxide morphologies that degrade above 300°C
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 simplifies the synthesis process, ensures high yield, and maintains morphology stability up to 1000°C, enhancing the selectivity of electrochemical sensors for nonane detection.
Implementation Method 1
putting indium oxide powder and bismuth oxide powder which are mixed according to a mass ratio of 1:0.1-0.5 into a ball mill for ball milling to obtain a uniform powder mixture; putting the obtained uniform powder mixture into a muffle furnace and calcining
Implementation Method 2
putting the above powder mixture into a ball mill for ball milling at room temperature to obtain a uniform powder mixture
Implementation Method 3
putting the obtained uniform powder mixture into a muffle furnace and calcining at 700-1000° C.
Data Source
AI summary
A preparation method of indium oxide with stable morphology includes: (1) mixing indium oxide powder and bismuth oxide powder according to a mass ratio of 1:0.1-0.5 to obtain a powder mixture; (2) putting the powder mixture into a ball mill for ball milling at room temperature to obtain a uniform powder mixture; (3) putting the obtained uniform powder mixture into a muffle furnace and calcining at 700-1000° C.; and (4) obtaining the indium oxide with cubic stable morphology after the muffle furnace naturally cools to room temperature. The method has advantages of simple synthesis process, short synthesis period, high sample yield, no need of complicated equipment, and morphology of the obtained indium oxide can be maintained after being heated at a high temperature within 1000° C. for 2 hours. An electrochemical sensor prepared by using the indium oxide obtained by the method has better selectivity to nonane.