α−Fe₂O₃ Nanoparticles/Porous g−C₃N₄ Hybrids Synthesized by Calcinations of Fe‐based MOF/Melamine Mixtures for Boosting Visible‐Light Photocatalytic Tetracycline Degradation

Abstract

A series of α−Fe2O3 nanoparticles/porous g−C3N4 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 Fe2O3/g−C3N4‐0.4, an optimized hybrid, was about 2.64 times higher than that of bulk g−C3N4. The results of structure characterizations and photoelectric property tests reflected that the large surface area and strong interfacial coupling of Fe2O3/g−C3N4‐0.4 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 Fe2O3/g−C3N4‐0.4 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 Fe2O3/g−C3N4 hybrid catalysts toward pollutant photodegradation.

A 2D/1D heterojunction nanocomposite built from polymeric carbon nitride and MIL-88A(Fe) derived α-Fe2O3for enhanced photocatalytic degradation of rhodamine B

“…59 Recently, a 0D/2D heterojunction in α-Fe 2 O 3 nanoparticles/porous C 3 N 4 nanosheet has been reported by Wang and co-workers; direct calcination of the MIL-101(Fe)-melamine mixtures leads to the formation of the heterojunction, which acts as an excellent photocatalyst for the degradation of tetracycline under visible light irradiation. 60 MIL-88A(Fe) has been explored as an excellent sacrificial template for the preparation of Fe 2 O 3 for heterogeneous photocatalysis owing to their high surface areas, catalytic active sites, and controllable pore sizes compared to Fe 2 O 3 , which is not MOF- derived.…”

Optimization of Water Based Drilling Fluid Properties with the SiO2/g-C3N4 Hybrid

“…The bulk of g-C 3 N 4 was made using a procedure that has been documented in the literature. 34 Alumina crucible containing 20 g of melamine was placed in a muffle furnace and heated to 550 °C at a rate of 10 °C/min for 4 h. After that, the solution was kept at room temperature at 25 °C. A yellow cluster was produced after calcination; this cluster was then ground into a fine powder in a mortar and pestle.…”

MOF composites derived BiFeO3@Bi5O7I n–n heterojunction for enhanced photocatalytic performance

“…The peak strength of Bi 5 O 7 I is three time higher than that of BiFeO 3 @Bi 5 O 7 I (1:2), which is in agreement with the findings of the photocurrent test. The composites possess lower emission intensities, suggesting that they are more favourable to charge separation and thus inhibit the recombination of electron-hole pairs [46].…”