A rational design of g-C 3 N 4 -based ternary composite for highly efficient H 2 generation and 2,4-DCP degradation

• Published in: Journal of colloid and interface science 2021-04, Vol.599, p.484
• Main Authors: Humayun, Muhammad, Pi, Wenbo, Yuan, Yang, Shu, Lang, Cao, Junhao, Khan, Abbas, Zheng, Zhiping, Fu, Qiuyun, Tian, Yahui, Luo, Wei
• Format: Article
• Language: English
• ISSN: 1095-7103
• DOI: 10.1016/j.jcis.2021.04.049

In this work, g-C N based ternary composite (CeO /CN/NH -MIL-101(Fe)) has been fabricated via hydrothermal and wet-chemical methods. The composite showed superior photoactivities for H O reduction to produce H and 2,4-dichlorophenol (2,4-DCP) degradation. The amount of H evolved over the composite under visible and UV-visible irradiations is 147.4 µmol·g ·h and 556.2 µmol·g ·h , respectively. Further, the photocatalyst degraded 87% of 2,4-DCP in 2 hrs under visible light irradiations. The improved photoactivities are accredited to the synergistic-effects caused by the proper band alignment with close interfacial contact of the three components that significantly promoted charge transfer and separation. The 2,4-DCP degradation over the composite is dominated by OH radical rather than h and O as investigated by scavenger trapping experiments. This is further supported by the electron para-magnetic resonance (EPR) study. This work provides new directions for the development of g-C N based highly efficient ternary composite materials for clean energy generation and pollution control.