Fig. 2: Composition and chemical interactions of ZnO@COF.

a PXRD patterns, b XPS spectra survey, c Zn 2p, d C 1 s, e N 1 s, f O 1 s of ZnO, COF, and ZnO@COF (c-f are XPS results of regions from the survey in b). The patterns of Fig. 2 are stacked. Source data for Fig. 2 are provided as a Source Data file.