Synthesis of 2D Material MXene from Ti3AlC2 MAX-phase for Electromagnetic Shielding Applications

Multi-layered Ti(3)C(2)T(X)MXene with F-/OH- termination was synthesized from high purity Ti3AlC2 MAX-phase powders by selectively etching away Al atoms using hydrochloride (HCl) + lithium fluoride (LiF).Single and few atomic layerMXene flakes were prepared by delaminating multi-layered MXene powders by sonication under flowing Argon gas. A characteristic peak of Ti3AlC2 MAX-phase ceramics at 9.5 observed in XRD patterns is shifted to lower value of 8.1 which confirms the conversion of Ti3AlC2 to Ti(3)C(2)T(x)MXene. The field emission scanning electron microscopy (FE-SEM) image also shows a typical lamellar structure of few nanometer widths. Raman spectra obtained from MXene shows three broad peaks centred on 210, 397, and 610 cm(-1) atypicalcharacteristic arising from Ti-C-Txatoms vibrationpresent inTi(3)C(2)T(x)MXene. The value of Electromagnetic interference shielding effectiveness (EMI SE) of Ti(3)C(2)T(x)MXene powder is of the order of 25 dB which makes it a promising candidate for EMI shielding applications.