Preparation and characterization of Ti3C2Tx with SERS properties

During the preparation of MXenes, the control of the amounts of metal atoms and functional groups has a great influence on the properties of Surface Enhancement Raman Scattering (SERS) substrate materials. A freestanding Ti 3 C 2 T x membrane with good uniformity was prepared by HF etching of Ti 3 AlC 2 . The effect of etching time on the removal of Al atoms and the functional groups bonded to Ti 3 C 2 was precisely characterized by XRD. In addition, by using Ti 3 C 2 T x as the SERS substrate, a quadratic relationship between the enhancement intensity and concentration of the dye molecule rhodamine was achieved.