Figure 2. SEM images of the (a) MOF NPs and (b,c) pMOF MSs. (d) XRD patterns of the simulated NH2-UiO-66, MOF NPs, and pMOF MSs. (e) FTIR spectra of the PSF, MOF NPs, and pMOF MSs. (f) High resolution S 2p XPS spectra of the MOF NPs and pMOF MSs.