Therefore, when organic
and inorganic compounds are both in the solution, both
oxidation and reduction reactions can take place simultaneously,
avoiding the possibility of recombination of the
electron–hole pairs and, therefore, these two processes must
be influenced synergically. It has been reported that many
inorganic compounds such as O2, Cr(VI), and S2O8
2−
[12–15] were used as electron scavengers, which inhibits
the recombination of electrons and holes, and enhance the
rate of photocatalytic degradation of organic compounds.