FIGURE 8 The XPS analysis of the tubular MXene/SS2.5membrane surface. A) Survey XPS spectrum of the MXene/SS2.5 membrane. High-resolution XPS spectra of B) Ti 2p, C) O 1s, D) C 1s, E) F 1s of the MXene/SS2.5membrane. F) FTIR result of the tubular MXene/SS2.5membrane.