Glucose-Assisted Synthesis of In₂O₃ Nanorods for High-Performance Ozone Detection.

Area of Science:

• Materials Science
• Nanotechnology
• Chemical Sensing

Background:

• Indium oxide (In2O3) is a promising material for ozone sensing due to its high electron mobility and surface oxygen species.
• Conventional In2O3 sensors lack sensitivity at low ozone levels and have slow response/recovery rates.

Purpose of the Study:

• To develop morphology-controlled In2O3 nanorods for enhanced ozone gas sensing.
• To improve sensitivity, response/recovery rates, and detection limits for high-precision ozone detection.

Main Methods:

• Synthesis of In2O3 nanorods using a glucose-assisted hydrothermal method.
• Fabrication and testing of In2O3 nanorod-based gas sensors.
• Comparison with In2O3 nanocubes for ozone sensing performance.

Main Results:

• Glucose-modulated In2O3 nanorods showed a sevenfold increase in response to 1 ppm ozone compared to nanocubes.
• Achieved a low detection limit of approximately 80 ppb for ozone.
• Demonstrated fast response (108 s) and recovery (238 s) times.

Conclusions:

• Morphology control of In2O3 via glucose modification significantly enhances ozone sensing performance.
• The developed nanorod structure offers a viable route for high-performance ozone gas sensors.
• Potential applications include real-time environmental ozone monitoring.