As expected, in this case, the recommendation of electrons and holes has been
significantly restrained, and the MnO x @CdS/CoP catalyst shows a reduction surface
and an enhanced photocatalytic activity for H 2 evolution (Fig. 9.10).
9.4 Multiple Light Scattering
The hollow or yolk–shell structure allows the multiple reflections of incident light
within the interior cavity, thus enhancing the photocatalytic activity due to the
improved light absorption efficiency (Fig. 9.11) [6]. The destroying of sphere-insphere structure by grinding the spheres causes a dramatic decrease of photocatalytic
activity that is similar to that of the solid spheres. As schematically illustrated in the
inset, a sphere-in-sphere structure with an appropriate inner sphere diameter allows
Fig. 9.9 The preparative process for CdS–Co 9 S 8 and corresponding TEM images; scale bar ¼
200 nm (Reproduced from ref. [15] by permission of John Wiley & Sons Ltd)
Fig. 9.10 Comparison of
photocatalytic activities of
the titania spheres with
solid, sphere-in-sphere, and
hollow structure. Inset
shows a schematic
illustration of
multireflections within the
sphere-in-sphere structure
(Reprinted with the
permission from ref.
[6]. Copyright 2007
American Chemical
Society)
9.4 Multiple Light Scattering
233
significantly restrained, and the MnO x @CdS/CoP catalyst shows a reduction surface
and an enhanced photocatalytic activity for H 2 evolution (Fig. 9.10).
9.4 Multiple Light Scattering
The hollow or yolk–shell structure allows the multiple reflections of incident light
within the interior cavity, thus enhancing the photocatalytic activity due to the
improved light absorption efficiency (Fig. 9.11) [6]. The destroying of sphere-insphere structure by grinding the spheres causes a dramatic decrease of photocatalytic
activity that is similar to that of the solid spheres. As schematically illustrated in the
inset, a sphere-in-sphere structure with an appropriate inner sphere diameter allows
Fig. 9.9 The preparative process for CdS–Co 9 S 8 and corresponding TEM images; scale bar ¼
200 nm (Reproduced from ref. [15] by permission of John Wiley & Sons Ltd)
Fig. 9.10 Comparison of
photocatalytic activities of
the titania spheres with
solid, sphere-in-sphere, and
hollow structure. Inset
shows a schematic
illustration of
multireflections within the
sphere-in-sphere structure
(Reprinted with the
permission from ref.
[6]. Copyright 2007
American Chemical
Society)
9.4 Multiple Light Scattering
233