Abstract
An efficient heterogeneous photocatalytic process coupling photocatalysis and Fenton-like process was carried out, where the Fenton-like cycle could be driven by self-produced H2O2 rather than extra H2O2 addition. It was revealed that C3N4por exhibited good performance at H2O2 production in pure water, which was enhanced up to eight times than bare g-C3N4. Fenton-like cycle was constructed in Ti3+-TiO2-C3N4por as C3N4por severed as H2O2 donator, while the Ti3+-TiO2 was able to provide photoinduced electrons for the Fenton-like process, resulting in the generation of much more OH radical. In addition, ESR spectra were performed to confirm the promotion of the Fenton-like cycle and much more OH radical was detected in Ti3+-TiO2-C3N4por than Ti3+-TiO2-C3N4 due to the great improvement in H2O2 production of C3N4por. What's more, the feasible photocatalytic mechanism of Ti3+-TiO2-C3N4por composite was also proposed.
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