Two‐Dimensional Nanostructured Materials for Gas Sensing

TLDR

Two‑dimensional nanostructures, with their high surface‑to‑volume ratio and device‑compatible design, have attracted attention for gas sensing, and recent studies across materials such as metal oxides, graphene, and MXenes demonstrate significant potential. This review surveys the latest advances in using diverse 2D nanomaterials for gas sensing. The review summarizes common preparation methods for 2D nanostructures, evaluates device sensing performance, discusses optimization strategies, and links structure–property correlations from experimental and theoretical studies. The authors conclude by outlining open challenges and future prospects for engineering advanced 2D nanostructures to achieve high‑performance gas sensors.

Abstract

Two‐dimensional (2D) nanostructures are highly attractive for fabricating nanodevices due to their high surface‐to‐volume ratio and good compatibility with device design. In recent years 2D nanostructures of various materials including metal oxides, graphene, metal dichalcogenides, phosphorene, BN and MXenes, have demonstrated significant potential for gas sensors. This review aims to provide the most recent advancements in utilization of various 2D nanomaterials for gas sensing. The common methods for the preparation of 2D nanostructures are briefly summarized first. The focus is then placed on the sensing performances provided by devices integrating 2D nanostructures. Strategies for optimizing the sensing features are also discussed. By combining both the experimental results and the theoretical studies available, structure‐properties correlations are discussed. The conclusion gives some perspectives on the open challenges and future prospects for engineering advanced 2D nanostructures for high‐performance gas sensors devices.