Akbari Masoud, Rasouli Jamal, Rasouli Kamal, Ghaedi Samaneh, Mohammadi Milad, Rajabi Hamid, Sabbaghi Samad
Department of Nano-Chemical Engineering, Faculty of Advanced Technologies, Shiraz University, Shiraz, Iran.
Department of Chemical Engineering, School of Chemical and Petroleum Engineering, Shiraz University, Shiraz, Iran.
Sci Rep. 2024 Dec 28;14(1):31498. doi: 10.1038/s41598-024-83333-3.
MXene-based (nano)materials have recently emerged as promising solutions for antibiotic photodegradation from aquatic environments, yet they are limited by scalability, stability, and selectivity challenges in practical settings. We formulated FeO-SiO/MXene ternary nano-photocomposites via coupled wet impregnation and sonochemistry approach for optimised tetracycline (TC) removal (the second most used antibiotic worldwide) from water using response surface methodology-central composite design (RSM-CCD). The photocatalysts containing various loading of FeO/SiO (5-45 wt%) on the MXene with a range of calcination temperatures (300-600 °C) via RSM optimisation were synthesised, characterised regarding crystallinity properties, surface morphology, binding energy, and light absorption capability, and analysed for TC degradation efficiency. The 25FeS/MX-450 composite among all samples demonstrated a superior efficiency in TC photocatalytic removal (98%) under optimised conditions (TC degradation: 39.75 mg/L, time: 68.28 min, pH: 5.57, catalyst dosage: 0.75 g/L). The developed surface area, with a reduced band gap due to FeS nanoparticles incorporation with improved light absorption within the visible spectrum, played a crucial role in the 25FeS/MX-450 heterostructure matrix, enhancing photogenerated carriers' separation and transportation capabilities. The tetracycline photoreduction mechanism involved electron transfer from FeS to the surface of MXene, engaging with O to produce •O-, attributed to the high electron mobility of MXene. Our findings for such nano-photocomposites materials can underscore the considerable potential of MXene-based nanomaterials for pharmaceutical removal from waterways.
基于MXene的（纳米）材料最近已成为从水生环境中光降解抗生素的有前景的解决方案，但在实际应用中，它们受到可扩展性、稳定性和选择性挑战的限制。我们通过耦合湿浸渍和声化学方法制备了FeO-SiO/MXene三元纳米光催化剂，采用响应面法-中心复合设计（RSM-CCD）优化从水中去除四环素（TC，全球第二大常用抗生素）。通过RSM优化合成了在MXene上含有不同负载量FeO/SiO（5-45 wt%）且煅烧温度范围为（300-600 °C）的光催化剂，对其结晶性能、表面形态、结合能和光吸收能力进行了表征，并分析了TC降解效率。在所有样品中，25FeS/MX-450复合材料在优化条件下（TC降解：39.75 mg/L，时间：68.28 min，pH：5.57，催化剂用量：0.75 g/L）对TC的光催化去除效率最高（98%）。由于FeS纳米颗粒的掺入降低了带隙，从而提高了可见光谱内的光吸收，所形成的表面积在25FeS/MX-450异质结构基体中起着关键作用，增强了光生载流子的分离和传输能力。四环素光还原机制涉及电子从FeS转移到MXene表面，与O结合产生•O-，这归因于MXene的高电子迁移率。我们对这种纳米光催化剂材料的研究结果凸显了基于MXene的纳米材料在从水道中去除药物方面的巨大潜力。
