Synthesis and characterization of an ultra-thin BiOCl/MXene heterostructure for the detection of NO₂ at room temperature with enhanced moisture resistance

Abstract

Two-dimensional ultrathin MXenes (Ti3C2Tx) have gained crucial attention in the field of gas sensing owing to their unique chemical and physical properties.

Ternary alloyed MoS2–xSex nanocomposites with a carrier mobility-dominated gas sensing mode: a superior room temperature gas sensing material for NO2 sensors

“…37 Table 1 shows the comparison of the NO 2 sensing performance of 2D material-based sensors in the literature with that of the MoS 2Àx Se x -based sensors in the present work. 33,[38][39][40][41][42][43][44][45][46][47] As shown, the MoS 2Àx Se x À4 sensor possesses a great response and low detection limit, as well as fast response and recovery rates at room temperature.…”

ZIF-67/BiOCl nanocomposites for highly efficient detection of NO2gas at room temperature

“…4d). 58 The peaks of Co 2p at a BE of 781.5 eV and 797.1 eV were attributed to Co 3+ of Co 2p 1/2 and Co 2p 3/2 , and the peaks at a BE of 785.4 eV and 801.5 eV were ascribed to Co 2+ of Co 2p 1/2 and Co 2p 3/2 (Fig. 4c and Table S4 †), 59,60 while the other two peaks are satellite peaks, conrming the synthesis of the ZBO-2 nanocomposites.…”

Recent developments in 2D MXene-based materials for next generation room temperature NO2 gas sensors

“…Heterostructures based on the highly conductive Ti 3 C 2 T x MXene and p-type semiconductor BiOCl offered electronic transmission channels with excellent response and quick response/recovery periods, as well as a lower detection limit (50 ppb) for NO 2 gas. 77…”

“…Heterostructures based on the highly conductive Ti 3 C 2 T x MXene and p-type semiconductor BiOCl offered electronic transmission channels with excellent response and quick response/recovery periods, as well as a lower detection limit (50 ppb) for NO 2 gas. 77 Sun et al constructed a NO 2 sensor based on Co 3 O 4 nanocrystals decorated on the surface of polyethylenimine (PEI) sheet functionalized MXene. 78 MXene provided the electron transport channels whereas high surface area and active sites of the p-type Co 3 O 4 nanocrystals contributed to achieving high NO 2 sensing performance with good response and recovery times of 27.9 s and 2 s for NO x gas at RT and at 26% RH, excellent selectivity, reproducibility and an LOD of 30 ppb.…”