Design and implementation of humidity sensor based on carbon nitride modified with graphene quantum dots
Mohamed Morsy1,2, Islam Gomaa3, M M Mokhtar4
1Building Physics and Environment Institute, Housing and Building National Research Center (HBRC), Dokki, Giza, 12311, Egypt. 83morsy@gmail.com.
Scientific Reports
|February 21, 2023
Summary
A novel humidity sensor was developed using carbon nitride/graphene quantum dots (g-C3N4/GQDs) nanocomposites. This sensor shows fast response and recovery, indicating potential for various humidity monitoring applications.
Area of Science:
- Materials Science
- Nanotechnology
- Sensor Technology
Background:
- Relative humidity (RH) significantly impacts daily life and requires accurate monitoring.
- Development of advanced sensing materials is crucial for effective humidity detection.
Purpose of the Study:
- To develop and characterize a new humidity sensor based on g-C3N4/GQDs nanocomposites.
- To evaluate the sensing performance of the developed material across a wide humidity range.
Main Methods:
- Synthesis and characterization of g-C3N4/GQDs nanocomposites using XRD, HR-TEM, FTIR, UV-Vis, Raman, XPS, and BET surface area analysis.
- Humidity sensing measurements were conducted from 7% to 97% RH at various frequencies.
Main Results:
- g-C3N4/GQDs nanocomposites were successfully synthesized with GQDs attached to the g-C3N4 surface.
- The nanocomposite exhibited a high BET surface area (545 m²/g).
- The sensor demonstrated good reversibility and fast response/recovery times.
Conclusions:
- The g-C3N4/GQDs nanocomposite is a promising material for humidity sensing applications.
- The developed sensor offers advantages like anti-interference, low cost, and ease of use.
- Potential applications include humidity alarms, diaper alarms, and breath analysis devices.
