Humidity-Sensing Performance of TiO2/RGO and α-Fe2O3/RGO Composites

Sensors, Journal Year: 2025, Volume and Issue: 25(3), P. 691 - 691

Published: Jan. 24, 2025

This study investigates the humidity-sensing properties of two semiconductor metal oxide (SMO)-reduced graphene (RGO) nanocomposites: TiO2/RGO and α-Fe2O3/RGO, at room temperature. Both nanocomposites are synthesized via hydrothermal methods coated onto printed circuit board (PCB) interdigital electrodes to construct humidity sensors. The surface morphology crystallographic structure materials characterized using field emission scanning electron microscopy (FESEM) X-ray diffraction (XRD). sensors tested across a range 11%RH 97%RH, impedance is measured over frequency 1 Hz MHz. results show that both α-Fe2O3/RGO exhibit favorable performance sensitivity hysteresis 12.2 MΩ/%RH 3.811%RH, respectively, while those 0.826 8.229%RH. response recovery times 72 s 99 s, 48 54 s. demonstrate good repeatability stability. These findings suggest SMO/RGO promising for development low-cost, high-sensitivity, stable

Language: Английский

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Cellulose/TiO2 Humidity Sensor

Sensors, Journal Year: 2025, Volume and Issue: 25(5), P. 1506 - 1506

Published: Feb. 28, 2025

Resistivity-type humidity sensors, which detect changes in electrical resistance response to variations environmental humidity, have garnered significant interest due their widespread application industry, agriculture, and daily life. These sensors rely on diverse materials for fabrication, but increasing variety has contributed the accumulation of electronic waste. As a biodegradable polymer, cellulose offers unique advantages, including naturally hydrophilic structure large specific surface area. properties enable reduce e-waste generation while facilitating efficient adsorption water molecules. However, despite these benefits, based solely often suffer from poor sensitivity its limited hydrophilicity non-adjustable structure. To overcome limitations, development composite emerges as promising solution enhancing performance cellulose-based sensors. Combining complementary TiO2, this work presents cellulose/TiO2 sensor through sustainable approach. The resulting material exhibits significantly improved compared with fabricated purely cellulose. achieve this, TiO2 nanoparticles were incorporated into extracted potato peels, film was using casting method. sensor’s evaluated by analyzing dependence complex impedance, measured over frequency range between 2 kHz 10 MHz, varying relative (RH).

Language: Английский

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A Capacitive Humidity Sensor with Improved Performance Based on the Synergistic Effect of Fluorinated Polyimide and Low-Loading Uio-66

Published: Jan. 1, 2025

Language: Английский

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STUDY OF THE EFFECT OF RELATIVE HUMIDITY ON THE CLASSIFICATION OF VOLATILE ORGANIC COMPOUNDS FOR A QUARTZ CRYSTAL MICROBALANCE SENSORS ARRAY

Sensors and Actuators A Physical, Journal Year: 2025, Volume and Issue: unknown, P. 116465 - 116465

Published: March 1, 2025

Language: Английский

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