Environmental Engineering Reference
In-Depth Information
E
C
Red
2
Dye*
e
e
h
Red
E
C
E
C
e
Red
hv
Ox
2
Dye
hv
Red
1
Ox
Ox
h
E
V
Ox
1
E
V
E
V
h
(a)
(b)
FIGURE 11.10
Schematic diagram illustrating the principle of charge separation between two semiconductor nanoparticles:
(a) heterojunction; (b) sensitization.
(a)
(b)
Photosystem II
Redox chain
Photosystem I
PS II
Redox chain
PS I
NADPH
Red
2
CHI
P700*
E
C
e
-
e
Ox
3
CHI
P680*
NADP
+
+
H
+
Ox
2
E
C
e
I
PQ
Cyt
Red
3
h
E
V
CHI
P700
hv
Red
1
PC
E
V
h
e
-
H
2
O
CHI
P680
hv
Ox
1
O
2
H
+
FIGURE 11.11
Z-scheme mechanisms in (a) the natural photosynthesis system and (b) semiconductor photocatalyst system.
