TiO₂/Halloysite Composites Codoped with Carbon and Nitrogen from Melamine and Their Enhanced Solar-Light-Driven Photocatalytic Performance

Figure 5

XPS analysis of (a) Ti 2p spectra of all the samples reoffered here; (b) N 1s and (c) O 1s spectra of calcined TiO₂/HNTs; (d) O 1s of C+N-TiO₂/HNTs.

(a)

(b)

(c)

(d)