α−Fe <sub>2</sub> O <sub>3</sub> Nanoparticles/Porous g−C <sub>3</sub> N <sub>4</sub> Hybrids Synthesized by Calcinations of Fe‐based MOF/Melamine Mixtures for Boosting Visible‐Light Photocatalytic Tetracycline Degradation
Baogang Wang, Xing Liu, Shanshan Dai, Hongsheng Lu
Abstract
Abstract A series of α−Fe 2 O 3 nanoparticles/porous g−C 3 N 4 hybrids were facile synthesized by calcinations of the Fe‐based MOF/melamine mixtures with different mass ratios for boosting visible‐light (λ>420 nm) photocatalytic tetracycline degradation in water. As expected, the specially designed hybrids exhibited obviously improved photocatalytic performance for tetracycline degradation. Specifically, the photocatalytic activity of Fe 2 O 3 /g−C 3 N 4 ‐0.4, an optimized hybrid, was about 2.64 times higher than that of bulk g−C 3 N 4 . The results of structure characterizations and photoelectric property tests reflected that the large surface area and strong interfacial coupling of Fe 2 O 3 /g−C 3 N 4 ‐0.4 resulted in its high photocatalytic activity by providing the adequate active sites and promoting the separation and transfer of photo‐generated electron‐hole (e − ‐h + ) pairs. In addition, the photocatalytic mechanism of Fe 2 O 3 /g−C 3 N 4 ‐0.4 was studied and the h + was determined to be the main active specie for tetracycline degradation. This work can provide crucial theoretical guidance for developing Fe 2 O 3 /g−C 3 N 4 hybrid catalysts toward pollutant photodegradation.