ZHANG Wenyu, DING Yuan, SUN Yufan, WANG Zifeng, HAN Yutong, ZHU Zhigang

(School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China)

Abstract: Recently, it is increasingly urgent to develop sensors that can detect toxic, harmful or volatile gases, with concentration of several parts per million, at room temperature or low operating temperature. As new two-dimensional materials, MXenes have attracted great attention due to their high conductivity, strong mechanical properties, adjustable layer spacing, large specific surface area and rich surface functional groups. Due to the graphene like morphology, high conductivity, adsorbability and other characteristics, MXenes have shown huge potential application in gas sensors. The structure, synthesis methods, electronic properties and physical and chemical properties of MXenes will be introduced, gas sensing performances of gas sensors based on MXenes and their composites will be summarized and the applications of two-dimensional materials in flexible wearability and medical diagnosis will be discussed. Finally, the current opportunities and challenges of two-dimensional materials MXenes will be overviewed.

Key words: nano materials; metallic oxide; gas sensing; MXene; flexible wearable