Template-Free Preparation and Photocatalytic and Photoluminescent Properties of Brookite TiO₂ Hollow Spheres

Figure 4

(a) Photocatalytic performance of MO degradation, (b) photoluminescence emission spectrum excited at 310 nm, (c) time-varied ESR spectra for DMPO-OH, and (d) schematic diagram for the photochemical process for TiO₂ hollow spheres.

(a)

(b)

(c)

(d)