金属氧化物室温气敏材料的结构调控及传感机理

Nanostructure Construction and Sensing Mechanism of Metal Oxides for Room Temperature Gas Sensing

室温气敏材料能耗低、稳定性好、安全性高,并且有助于简化传感器的器件结构,具有很好的实际应用前景。开发具有优异室温传感性能的气敏材料成为近年来传感领域的研究热点。金属氧化物半导体材料来源广泛、环境友好、结构调控灵活,在室温气体传感性能方面取得一定的进展。本文介绍了金属氧化物气敏材料的发展历程及气体传感机理,详述了各种具有室温气敏性能的金属氧化物纳米结构,重点讨论构建金属氧化物室温传感性能的有效策略和传感机制,并对室温传感材料的未来发展进行了展望。

A gas sensor working at room temperature shows great potential in practical applications due to its lower energy consumption,good stability,high security and ease of miniaturization.World-wide efforts have been devoted to explore materials with excellent room-temperature gas sensing performance.Metal oxide semiconductor materials are widely sourced,environmentally friendly and flexible in structure control.Research of metal oxide semiconductor based sensors operated at room temperature has made significant progress recently.In this paper,the development process and working principle of metal oxide gas sensors are introduced,various metal oxide nanostructures in regard to their room-temperature gas sensing properties are comprehensively reviewed.Particular emphasis is given to those effective strategies for constructing room-temperature sensors and their sensing mechanism.Finally,some future research perspectives in the field of room-temperature sensors are discussed as well.