Electrospinning of NH 2 -MIL-88B(Fe)/TiO 2 /PAN (NMTP) nanofiber membranes：photocatalytic degradation tetracycline and efficient oil-water separation applications

Abstract Excessive discharge of TC poses a threat to the environment and human health, while finding a cost-effective treatment method to remove TC from water still remains a challenge. In this study, NH2-MIL-88B(Fe)/TiO2/PAN (NMTP) electrospinning nanofibrous membranes (ENMs) were prepared, and the NMTP ENMs were characterized by SEM, XRD, UV-vis and other characterization methods. The results show that the introduction of NH2-MIL-88B(Fe) expands the photoresponse range of ENMs and improves the hydrophilicity of the membranes, NMTP ENMs exhibit excellent photocatalytic performance during the photocatalytic process, and the best sample has excellent photocatalytic performance for TC. The degradation efficiency can reach 93.0%. After 4 times of photocatalytic regeneration, the removal rate still remains about 80%, and its recovery performance is high. The best degradation efficiency of CTC and OTC can reach 94.9% and 86.5%, respectively. In the oil-water separation experiment, the NMTP ENMs exhibited excellent separation performance and high throughput for oil-in-water emulsions, with separation efficiencies of 98.15%, 97.43% and 84.87% for toluene-in-water, n-heptane-in-water and n-hexane-in-water emulsions, respectively. Based on the above results, this study provides a new strategy for developing efficient and stable technologies for simultaneous catalysis and separation of oil-in-water emulsions.