*2.5. Detection of Active Species*

To scrutinize the reactive species that was responsible for photocatalytic degradation of MB, three scavenger tests were done in the same procedure as discussed in the photodegradation experiment. In the scavenger tests, *di*–ammonium oxalate monohydrate, 2–propanol, and ascorbic acid were stipulated as h+, •OH, and •O2 − reactive species, respectively [29,30].
