Research Progress on Ammonia Sensors Based on Ti 3 C 2 T x MXene at Room Temperature: A Review.

Ammonia (NH 3 ) potentially harms human health, the ecosystem, industrial and agricultural production, and other fields. Therefore, the detection of NH 3 has broad prospects and important significance. Ti 3 C 2 T x is a common MXene material that is great for detecting NH 3 at room temperature because it has a two-dimensional layered structure, a large specific surface area, is easy to functionalize on the surface, is sensitive to gases at room temperature, and is very selective for NH 3 . This review provides a detailed description of the preparation process as well as recent advances in the development of gas-sensing materials based on Ti 3 C 2 T x MXene for room-temperature NH 3 detection. It also analyzes the advantages and disadvantages of various preparation and synthesis methods for Ti 3 C 2 T x MXene's performance. Since the gas-sensitive performance of pure Ti 3 C 2 T x MXene regarding NH 3 can be further improved, this review discusses additional composite materials, including metal oxides, conductive polymers, and two-dimensional materials that can be used to improve the sensitivity of pure Ti 3 C 2 T x MXene to NH 3 . Furthermore, the present state of research on the NH 3 sensitivity mechanism of Ti 3 C 2 T x MXene-based sensors is summarized in this study. Finally, this paper analyzes the challenges and future prospects of Ti 3 C 2 T x MXene-based gas-sensitive materials for room-temperature NH 3 detection.