A room temperature ammonia gas sensor based on cerium oxide/MXene and self-powered by a freestanding-mode triboelectric nanogenerator and its multifunctional monitoring application

Abstract

A high-precision CeO2/V2C sensor for NH3 capable of operating at room temperature is constructed via in situ polymerization and exhibits excellent response and stability, low detection limit, and fast response/recovery time.

Room-temperature chemiresistive ammonia sensors based on 2D MXenes and their hybrids: recent developments and future prospects

“…By using an in situ polymerization technique, Wang et al suggested a high-precision CeO 2 /V 2 C ammonia sensor that can function at ambient temperature. 61 Overall, it was seen that the resistance of sensors made of pure CeO 2 and the CeO 2 /V 2 C composite both reduced when the concentration level of NH 3 rose. The sensor with CeO 2 /V 2 C composite material exhibited a response/recovery time of 12 s/19 s, which was faster as compared with the pristine CeO 2 sensor.…”

Perspectives of 2D MXene-based materials for self-powered smart gas sensors

“…A notable example of this self-powered approach is found in a hydraulic power generation device employing a freestanding-mode TENG in the study carried out by Wang et al . 45 This hydraulic device propels underwater fan blades into motion by utilizing the flow of water. As the fan blades rotate, they drive the TENG positioned on the water surface via a connecting rod, thus generating electricity.…”

Dielectric-Enhanced, High-Sensitivity, Wide-Bandwidth, and Moisture-Resistant Noncontact Triboelectric Sensor for Vibration Signal Acquisition

“…Triboelectric nanogenerator (TENG) is a promising technology for energy harvesting and self-powered sensing based on the coupling effect of friction electrification and electrostatic induction. − Recently, triboelectric sensors (TESs) used for vibration signal acquisition have been investigated a lot due to their simple structure and low-cost fabrication. − However, TESs operated in mechanical vibration signal acquisition, contact, and separation periodically lead to wear of the triboelectric layer inevitably. Noncontact TES works without mechanical contact, showing a great advantage in self-powered sensing signal acquisition. − …”