on the other hand the utilization of H
2
O
is significant for the practical applications.
This is illustrated by the H
2
2
O
2
consumption index (X
),
which was defined as moles of H
2
O
consumed per mole of AO7
degraded until 50% conversion of AO7 was achieved [32]. The
X
H2O2
2
decreased from 50 to 10 when the initial concentration of
AO7 increased from 0.025 to 0.200 mM, indicating that the utilization
of H
2
O
for AO7 degradation increases at relatively high AO7
concentrations.