Highly Sensitive NH₃ Wireless Sensor Based on Ag-RGO Composite Operated at Room-temperature

Area of Science:

• Materials Science
• Chemical Sensing
• Nanotechnology

Background:

• Accurate ammonia (NH3) detection is crucial for industrial processes and human health.
• Developing sensitive and selective NH3 sensors remains a significant challenge.

Purpose of the Study:

• To develop a cost-efficient and environmentally friendly sensing material for ammonia detection.
• To create a wireless gas sensor utilizing the novel sensing material.

Main Methods:

• Preparation of reduced graphene oxide (RGO) decorated with silver nanoparticles (AgNPs) using a green synthesis approach.
• Characterization of the sensing material using X-ray diffraction (XRD), Raman spectroscopy, and field emission scanning electron microscopy (FE-SEM).
• Integration of the sensing material with a near-field communication (NFC) tag to build a wireless gas sensor.

Main Results:

• The synergistic effect between AgNPs and RGO significantly enhanced ammonia-sensing performance.
• AgNPs improved the adsorption capacity of RGO for ammonia molecules.
• The wireless sensor demonstrated excellent performance for NH3 detection.

Conclusions:

• The AgNP-decorated RGO material is a promising candidate for highly sensitive ammonia gas sensing.
• The developed wireless sensor has potential applications in food safety, environmental monitoring, and human health.
• The green synthesis approach offers a scalable and sustainable method for producing advanced gas sensing materials.