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Room temperature NH3 gas sensor based on In(OH)3/Ti3C2Tx nanocomposites
Zhihua Zhao1, Longqi Yao2, Shuaiwen Zhang2
1College of Mechanical and Electrical Engineering, Henan University of Technology, Zhengzhou, 450052, China. zhaozhihua@haut.edu.cn.
Mikrochimica Acta
|June 5, 2024
Summary
A novel In(OH)3/Ti3C2Tx nanocomposite gas sensor offers enhanced ammonia detection. This sensor shows a 3.5-fold improvement, providing rapid and stable monitoring of ammonia gas at room temperature.
Area of Science:
- Materials Science
- Environmental Science
- Chemical Engineering
Background:
- Industrialization and agriculture increase environmental contamination, particularly ammonia pollution.
- High ammonia concentrations threaten ecosystems and human health, necessitating accurate detection.
- Existing ammonia gas sensors require improvement in sensitivity and stability.
Purpose of the Study:
- To develop a highly sensitive and stable ammonia gas sensor.
- To utilize In(OH)3/Ti3C2Tx nanocomposites for improved gas sensing performance.
- To address the challenge of accurate ammonia monitoring in the environment.
Main Methods:
- In-situ electrostatic self-assembly process to create In(OH)3/Ti3C2Tx nanocomposites.
- Fabrication of a gas sensor based on the developed nanocomposite material.
- Characterization using X-ray Diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), Brunauer–Emmett–Teller (BET), and Transmission Electron Microscopy (TEM).
Main Results:
- The In(OH)3/Ti3C2Tx sensor demonstrated a 16.8% response to 100 ppm NH3 at room temperature.
- Achieved a 3.5-fold performance enhancement compared to pure Ti3C2Tx sensors.
- Exhibited a fast response time of 20 s, high sensitivity to low NH3 concentrations (≤10 ppm), and 30-day stability.
Conclusions:
- The developed In(OH)3/Ti3C2Tx gas sensor shows significant potential for effective ammonia detection.
- The nanocomposite material offers superior performance characteristics for environmental monitoring.
- This sensor technology provides a promising solution for addressing ammonia pollution concerns.
