Facile Solvothermal Synthesis of Hollow BiOBr Submicrospheres with Enhanced Visible-Light-Responsive Photocatalytic Performance

Figure 6

XPS spectra of the HBSMs: (a) survey, (b) Bi 4f, (c) Br 3d, and (d) O 1s.

(a)

(b)

(c)

(d)