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

Abstract

MXene with distinctive structure, good electrical conductivity and abundant functional groups has shown great potential in the fabrication of high performance gas sensors. Since the sensing mechanism of MXene-based gas...

Fabrication of a room-temperature NO2 gas sensor with high performance at the ppb level using an rGO/BiOCl heterostructure

“…26,27 Consequently, the sensitivity and repeatability of the manufactured sensors are severely reduced. [28][29][30][31][32] Therefore, it was necessary to fabricate a novel and effective composite to detect NO 2 gas with high sensitivity along with the small size and ultrathin morphology of the rGO/BiOCl nanocomposite. The obtained structure can enhance the number of available active sites and electrical conductivity, which can further increase gas sensing performance.…”

Sensing nature's alarm: SnO2/MXene gas sensor unveils methyl jasmonate signatures of plant insect stress

“…15–18 The abundance of active sites, commendable conductivity, customizable surface chemistry, and remarkable stability make MXenes highly appealing for applications in gas sensing. 19,20 However, other materials such as porous MOFs typically have very low electrical conductivity, which is partly due to the insulating nature of the organic ligands and the lack of overlap between their p orbitals and the d orbitals of metal ions, making them inappropriate candidates for gas sensing materials. 21,22…”

Facile Design of Ti3C2TX (MXene) Modified Spherical SrTiO3 Structure toward Highly Sensitive Room Temperature Detection of NO2

“…Among various 2D materials, MXenes (transition-metal carbides/nitrides) have experienced a great deal of development since their birth in 2011, appealing to various researchers to explore their ability in diverse applications. Although many investigations have been performed by taking graphene and TMDs, the materials lack faster response and recovery, also the TMDs suffered incomplete recovery due to its high adsorption. , MXene is characterized by the formula M n +1 X n T x , where n is 1,2, or 3, M stands for Ti, Mo, and V (early transition metal), X stands for carbon/nitrogen, and T x symbolizes surface terminating groups such as fluorine (−F), hydroxyl (−OH), and/or oxygen (O) groups . The emerging 2D material MXene has outstanding ability such as high surface area, negative surface charge and hydrophilicity, high gas permeability, high conductivity, excellent flexibility, tunable work function and low cost synthesis technique render its usage in numerous fields like photocatalysis, catalysis, energy storage, , lithium-ion batteries, , and gas sensing. , Though pristine MXene possesses outstanding properties, the restacking process of the layers during the drying process reduces its specific surface area.…”