AUTHOR=Han Yutong , Ding Yuan , Yao Yu , Li Zhanhong , Zhu Zhigang 

TITLE=Heterostructured Ti3C2Tx/carbon nanohorn-based gas sensor for NH3 detection at room temperature

JOURNAL=Frontiers in Materials

VOLUME=11

YEAR=2024

URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2024.1383538

DOI=10.3389/fmats.2024.1383538

ISSN=2296-8016

ABSTRACT=<p>In this study, a two-dimensional Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene compounded with carbon nanohorn (CNH) by an electrostatic self-assembly method was proposed and then fabricated as room temperature ammonia (NH<sub>3</sub>) gas sensors. The successful preparation of the Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>/CNH nanocomposite has been characterized in detail. The NH<sub>3</sub> sensing performance based on Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>/CNH also has been tested at room temperature. The optimal Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>/CNH sensor has a response value of 21.6% to 100 ppm NH<sub>3</sub> at room temperature, which is 10 times higher than that of the pure Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> sensor. Furthermore, this sensor is endowed with excellent selectivity, reliable long-term stability, and reproducibility. The enhanced sensing performance is associated with the interconnected structure and the synergistic effect of Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> and CNH. This work provides an effective way to prepare MXene-based sensitive materials for NH<sub>3</sub> sensors, which shows excellent NH<sub>3</sub> detection potential at room temperature.</p>