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 HO rather than extra HO addition. It was revealed that CNpor exhibited good performance at HO production in pure water, which was enhanced up to eight times than bare g-CN. Fenton-like cycle was constructed in Ti-TiO-CNpor as CNpor severed as HO donator, while the Ti-TiO 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 Ti-TiO-CNpor than Ti-TiO-CN due to the great improvement in HO production of CNpor. What's more, the feasible photocatalytic mechanism of Ti-TiO-CNpor composite was also proposed.
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