GO@MIL-53(Fe) adsorption-photocatalytic synergistic degradation of tetracycline

Metal-organic frameworks (MOFs) are commonly utilized for environmental remediation because of their exceptional physicochemical characteristics. This study synthesized GO@MIL-53(Fe) (MFG 2 %) using the solvothermal approach to remove tetracycline from water. The composites were evaluated utilizing several material characterization techniques, including XRD, BET, SEM, etc. The study found that the most effective synthesis of MFG 2 % occurred with a mass ratio of Fe:GO=100:2, a temperature of 150 °C, and a hydrothermal time of 24 h. This resulted in a 91.6 % removal of tetracycline after a 45-minute dark reaction followed by a 75-minute light reaction using a 400 W mercury lamp with a wavelength of 365 nm. In comparison, the degradation rate of tetracycline by MIL-53(Fe) (MFG 0 %) under identical conditions was 75.6 %. Meanwhile, MFG 2 % demonstrated remarkable adsorption-photocatalytic synergism. The enhanced efficiency of MFG 2 % was mostly due to the incorporation of graphene oxide (GO), which expanded the light absorption range of the material. Additionally, the high electrical conductivity of GO enhanced the active site of the photocatalytic reaction and increased the quantum yield. The ESR characterization and quenching studies revealed that three radicals, •O2-, h+, and •OH, participated in the degradation procedure. The principal active component is •O2-. This paper introduces a novel method for doping modification of MOF-like materials and the breakdown of tetracycline.