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Self-powered temperature and humidity sensing platform based on Ag2S/poly(5-carboxyindole)/hydroxyethyl cellulose
Shunyi Zhu1, Qing Li1, Yanting Guo1
1Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China.
Journal of Colloid and Interface Science
|March 16, 2025
Summary
A novel self-powered platform integrates temperature and humidity sensing using a Ag2S/P5ICA/HEC composite. This dual-function sensor offers high sensitivity and stability for applications in storage and agriculture.
Area of Science:
- Materials Science
- Nanotechnology
- Sensor Technology
Background:
- Developing integrated sensing platforms is crucial for real-time environmental monitoring.
- Existing sensors often require external power sources, limiting their applicability.
- Advanced nanomaterials offer unique properties for enhanced sensor performance.
Purpose of the Study:
- To construct a self-powered, dual-function platform for simultaneous temperature and humidity sensing.
- To utilize a novel Ag2S/P5ICA/HEC composite material for sensing and energy storage.
- To evaluate the performance and stability of the integrated sensing platform.
Main Methods:
- Synthesis of Ag2S nanomaterial with a reticular porous structure via solvothermal method.
- Preparation of Ag2S/P5ICA/HEC composite for humidity sensing via drop-coating.
- Fabrication of a symmetric supercapacitor using Ag2S electrodes for energy storage.
- Characterization of electrochemical properties, temperature sensitivity, and humidity response.
Main Results:
- Ag2S electrodes exhibited high specific capacitance (6.11F/cm3) and cycle stability.
- The Ag2S material demonstrated linear temperature sensitivity (R2 = 0.992).
- The Ag2S/P5ICA/HEC humidity sensor showed high sensitivity (0.078 Ω/% RH) and linearity (R2 = 0.996) in the 20-80% RH range.
- A self-powered platform successfully integrated temperature and humidity sensing capabilities.
Conclusions:
- The Ag2S/P5ICA/HEC composite enables a high-performance, self-powered dual-function sensor.
- The integrated platform demonstrates excellent sensitivity, stability, and repeatability for temperature and humidity detection.
- This technology holds significant potential for applications in sensitive storage environments (pharmaceuticals, food) and agriculture.
