Hjiri M, Najeh I, Barakat Fatemah M, Neri G
Department of Physics, College of Sciences, Imam Mohammad Ibn Saud Islamic University (IMSIU) Riyadh 11623 Saudi Arabia.
Laboratory of Physics of Materials and Nanomaterials Applied at Environment (LaPhyMNE), Faculty of Sciences in Gabes, Gabes University Gabes Tunisia
RSC Adv. 2025 Apr 25;15(17):13370-13396. doi: 10.1039/d5ra01197c. eCollection 2025 Apr 22.
The detection of toxic gases by resistive gas sensors, which are mainly fabricated using semiconducting metal oxides, is of importance from a safety point of view. These sensors have outstanding electrical and sensing properties as well as are inexpensive. WO (WO), which is a non-stoichiometric tungsten oxide, possesses abundant oxygen vacancies, which are beneficial for the adsorption of oxygen gas molecules and act as sites for sensing reactions. Thus, through the rational design of WO-based gas sensors using strategies such as morphology engineering, doping, decoration, formation of composites or their combination, the fabrication of high-performance WO gas sensors is feasible. Herein, we present the gas-sensing features of pristine WO, doped WO, decorated WO and composite-based WO sensors. Moreover, focusing on the sensing mechanism of WO sensors, this review provides an in-depth understanding on the working principles of the sensing of toxic gases using WO.
电阻式气体传感器主要由半导体金属氧化物制成，从安全角度来看，利用这类传感器检测有毒气体具有重要意义。这些传感器具有出色的电学和传感特性，而且价格低廉。WO（氧化钨）是一种非化学计量比的氧化钨，具有丰富的氧空位，这有利于氧气分子的吸附，并作为传感反应的位点。因此，通过诸如形貌工程、掺杂、修饰、复合材料形成或它们的组合等策略对基于WO的气体传感器进行合理设计，制造高性能的WO气体传感器是可行的。在此，我们展示了原始WO、掺杂WO、修饰WO和基于复合材料的WO传感器的气敏特性。此外，本综述聚焦于WO传感器的传感机制，深入探讨了利用WO检测有毒气体的工作原理。
