@article{Li2025, 
author = {Zhihui Li and Wen Zeng and Fuping Zeng and Qu Zhou},
title = {A highly sensitive ammonia sensor and multifunctional monitoring system based on MoO3@Ti3C2TX(MXene) at room temperature for intelligent agriculture},
year = {2025},
journal = {Journal of Advanced Ceramics},
volume = {14},
number = {8},
pages = {9221128},
keywords = {MoO3@Ti3C2TX, ammonia sensor, room temperature, density functional theory (DFT), gas monitoring system},
url = {https://www.sciopen.com/article/10.26599/JAC.2025.9221128},
doi = {10.26599/JAC.2025.9221128},
abstract = {To address the persistent challenges of low sensing performance, ambiguous sensing mechanisms, and difficult portable monitoring in existing MXene-based NH3 sensors, this study developed a high-performance MoO3@Ti3C2TX room-temperature NH3 sensor through ultrasonic composite modification. The MoO3@Ti3C2TX sensor demonstrated significant sensitivity to NH3 at room temperature, with excellent long-term stability, fast response recovery time (14 s/24 s), and excellent selectivity, which are superior to those of most reported Ti3C2TX-based and intrinsic MoO3 sensors. Owing to the unique microstructure of MoO3@Ti3C2TX, the dual active sites of Ti3C2TX functional groups (–O/–F/–OH) and oxygen vacancies facilitate the oxidative adsorption and dissociation of NH3. The formation of interfacial Schottky junctions and charge regulation significantly enhanced the gas sensitivity of MoO3@Ti3C2TX toward NH3. Density functional theory (DFT) simulations further revealed an increased NH3 adsorption energy and strong atomic orbital hybridization at the heterointerface. Furthermore, this study integrated the MoO3@Ti3C2TX sensor into a multifunctional Internet of Things (IoT) monitoring system, which enabled real-time visualization of NH3 detection through threshold-triggered alarms, demonstrating its utility in smart agriculture.}
}