fig4

Figure 4. (A) Surface SEM images of nanocomposite films: (a1) Pure PEI, (a2) PEI/BST@CdS-1, (a3) PEI/BST@CdS-2, (a4) PEI/BST@CdS-3, and (a5) PEI/BST-2. Insets are the corresponding cross-section SEM images. (B) Transmittance spectra of nanocomposite films. (C) Color difference of nanocomposite films (Insets are optical photographs of films). (D) XRD patterns, (E) FTIR spectra, (F) DSC curves, and (G)Young’s moduli of nanocomposite films.