As shown in Fig. 6a, increasing the initial
AO7 concentration leads to a lower rate constant for AO7 degradation
(k
). This may be because either: (a) the adsorption rate
constant decreases at higher AO7 concentrations (Fig. 6a, k
c
),
resulting in a lower reaction rate due to a lower probability of
collisions between AO7 and reactive species;