Room-temperature NO₂ sensing performance of ZnO/Ti₃C₂T_x heterojunctions

• Ngo Thi Chau,
• Quoc Vinh Ho,
• Dai Hai Nguyen,
• Phan Khanh Thinh Nguyen and
• Qui Thanh Hoai Ta

Beilstein J. Nanotechnol. 2026, 17, 1159–1169, doi:10.3762/bjnano.17.79

• gas sensing performance is attributed to the abundance of oxygen vacancies and surface functional groups within the ZnO/Ti3C2Tx composites, which facilitate robust interactions with NO2 molecules. These findings underscore the efficacy of ZnO/Ti3C2Tx nanocomposites as a viable strategy for enhancing

• the gas sensing properties of Ti3C2Tx-based sensors. Keywords: gas sensor; room temperature; ZnO/Ti3C2Tx composites; Introduction Nowadays, increasing attention is paid to the early detection and prevention of chemical leaks and accidental releases, highlighting the importance of identifying trace

• leading to the formation of an interfacial electron depletion layer at the ZnO/Ti3C2Tx interface. When the ZnO/Ti3C2Tx composites were exposed to synthetic air, oxygen molecules were chemisorbed on the sensor surface. As a result, O2 molecules could trap the free electrons from the ZnO/Ti3C2Tx to create a