Zhang Run, Qin Cong, Bala Hari, Wang Yan, Cao Jianliang
School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
Nanomaterials (Basel). 2023 Jul 27;13(15):2188. doi: 10.3390/nano13152188.
Gas-sensing technology has gained significant attention in recent years due to the increasing concern for environmental safety and human health caused by reactive gases. In particular, spinel ferrite (MFeO), a metal oxide semiconductor with a spinel structure, has emerged as a promising material for gas-sensing applications. This review article aims to provide an overview of the latest developments in spinel-ferrite-based gas sensors. It begins by discussing the gas-sensing mechanism of spinel ferrite sensors, which involves the interaction between the target gas molecules and the surface of the sensor material. The unique properties of spinel ferrite, such as its high surface area, tunable bandgap, and excellent stability, contribute to its gas-sensing capabilities. The article then delves into recent advancements in gas sensors based on spinel ferrite, focusing on various aspects such as microstructures, element doping, and heterostructure materials. The microstructure of spinel ferrite can be tailored to enhance the gas-sensing performance by controlling factors such as the grain size, porosity, and surface area. Element doping, such as incorporating transition metal ions, can further enhance the gas-sensing properties by modifying the electronic structure and surface chemistry of the sensor material. Additionally, the integration of spinel ferrite with other semiconductors in heterostructure configurations has shown potential for improving the selectivity and overall sensing performance. Furthermore, the article suggests that the combination of spinel ferrite and semiconductors can enhance the selectivity, stability, and sensing performance of gas sensors at room or low temperatures. This is particularly important for practical applications where real-time and accurate gas detection is crucial. In conclusion, this review highlights the potential of spinel-ferrite-based gas sensors and provides insights into the latest advancements in this field. The combination of spinel ferrite with other materials and the optimization of sensor parameters offer opportunities for the development of highly efficient and reliable gas-sensing devices for early detection and warning systems.
近年来，由于活性气体对环境安全和人类健康的影响日益受到关注，气体传感技术备受瞩目。特别是具有尖晶石结构的金属氧化物半导体——尖晶石铁氧体（MFeO），已成为气体传感应用中有前景的材料。这篇综述文章旨在概述基于尖晶石铁氧体的气体传感器的最新进展。文章首先讨论了尖晶石铁氧体传感器的气敏机制，该机制涉及目标气体分子与传感器材料表面之间的相互作用。尖晶石铁氧体的独特性质，如高比表面积、可调带隙和出色的稳定性，有助于其气敏能力。接着，文章深入探讨了基于尖晶石铁氧体的气体传感器的最新进展，重点关注微观结构、元素掺杂和异质结构材料等各个方面。通过控制晶粒尺寸、孔隙率和表面积等因素，可以调整尖晶石铁氧体的微观结构，以提高气敏性能。元素掺杂，如引入过渡金属离子，可以通过改变传感器材料的电子结构和表面化学性质进一步提高气敏性能。此外，在异质结构配置中将尖晶石铁氧体与其他半导体集成，已显示出提高选择性和整体传感性能的潜力。此外，文章指出尖晶石铁氧体与半导体的结合可以在室温或低温下提高气体传感器的选择性、稳定性和传感性能。这对于实时准确气体检测至关重要的实际应用尤为重要。总之，这篇综述突出了基于尖晶石铁氧体的气体传感器的潜力，并提供了该领域最新进展的见解。尖晶石铁氧体与其他材料的结合以及传感器参数的优化为开发用于早期检测和预警系统的高效可靠气体传感装置提供了机会。
