Construction of Ti3+-TiO2-C3N4por compound coupling photocatalysis and Fenton-like process: Self-driven Fenton-like process without extra H2O2 addition

作者：Xu, Jiajie; Dai, Guodong; Chen, Biyu; He, Donglin; Situ, Yue; Huang, Hong^*

来源：Chemosphere, 2020, 241: 125022.

DOI：10.1016/j.chemosphere.2019.125022

• TiO2
• C3N4
• Fenton-like
• H2O2
• Photocatalysis

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-C(3)N(4)por as C(3)N(4)por 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)-O-center dot radical. In addition, ESR spectra were performed to confirm the promotion of the Fenton-like cycle and much more (OH)-O-center dot radical was detected in Ti3+-TiO2-C(3)N(3)por than Ti3+-TiO2-C3N4 due to the great improvement in H2O2 production of C(3)N(4)por. What's more, the feasible photocatalytic mechanism of Ti3+-TiO2-C(3)N(4)por composite was also proposed.