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A Highly Sensitive and Selective ppb-Level Acetone Sensor Based on a Pt-Doped 3D Porous SnO2 Hierarchical Structure
Wenjing Quan1, Xuefeng Hu2, Xinjie Min1
1State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, No. 5 Xin Mofan Road, Nanjing 210009, China.
Sensors (Basel, Switzerland)
|February 26, 2020
Summary
This study developed a novel platinum-doped porous tin dioxide sensor for highly sensitive and selective acetone detection. The enhanced material structure significantly improves acetone sensor performance at lower temperatures.
Area of Science:
- Materials Science
- Chemical Sensing
- Nanotechnology
Background:
- Acetone sensors suffer from low sensitivity, high operating temperatures, and poor selectivity.
- Improving material surface area, activity, and gas diffusion are key to enhancing sensor performance.
Purpose of the Study:
- To develop a novel material for improved acetone sensing.
- To enhance acetone sensor performance by optimizing material structure and properties.
Main Methods:
- Synthesized a hierarchical flower-like platinum-doped 3D porous SnO2 (3DPS) material using a one-step hydrothermal method.
- Constructed micropores through subsequent annealing.
- Fabricated and tested a sensor based on the synthesized 3DPS material.
Main Results:
- The 3DPS-based sensor exhibited a maximum sensitivity (Ra/Rg) of 505.7 at 153 °C for 100 ppm acetone.
- The sensor showed a response of 2.1 at 153 °C even with 50 ppb acetone exposure.
- The sensor demonstrated excellent selectivity for acetone detection.
Conclusions:
- The hierarchical flower-like structure, enhanced surface activity, and porous nature of 3DPS contribute to high sensitivity and selectivity.
- The developed 3DPS material offers a promising solution for low-temperature, high-performance acetone sensing.
