Статья

Efficient visible-light-driven photocatalytic degradation of antibiotics in water by MXene-derived TiO2-supported SiO2/Ti3C2 composites: Optimisation, mechanism and toxicity evaluation

Seyed Mahmoud MousaviDepartment of Nano-Chemical Engineering, Faculty of Advanced Technologies, Shiraz University, Shiraz, IranMohammad Sina MohtaramDepartment of Nano-Chemical Engineering, Faculty of Advanced Technologies, Shiraz University, Shiraz, IranKamal RasouliDepartment of Chemical Engineering, School of Chemical and Petroleum Engineering, Shiraz University, Shiraz, IranSoheil MohtaramSchool of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, ChinaHamid RajabiDepartment of Civil and Environmental Engineering, School of Engineering, University of Liverpool, Liverpool, L69 3GH, UK. Electronic address: [email protected]Samad SabbaghiDepartment of Nano-Chemical Engineering, Faculty of Advanced Technologies, Shiraz University, Shiraz, Iran; Drilling Nanofluid Lab, Shiraz University, Shiraz, Iran; Nanotechnology Research Institute, Shiraz University, Shiraz, Iran. Electronic address: [email protected]

2024en

ABI

Аннотация

Photocatalytic technology has emerged as a promising solution to global water contamination, mainly through the effective degradation of persistent pharmaceutical pollutants. However, a few challenges still exist in enhancing degradation efficiency, reducing the toxicity of by-products, and ensuring cost-effective scalability. This study focuses on Tetracycline Hydrochloride (TCH) as an index antibiotic pollutant to evaluate the performance of a novel MXene-derived TiO 2 -supported SiO₂/Ti 3 C 2 composite (SMXT) synthesized using ultrasonic and wet impregnation techniques. The SMXT-450 sample, annealed at 450 °C, exhibited a remarkable 95% degradation of TCH within 80 min, surpassing more complex three-component systems. The superior photocatalytic activities, validated through comprehensive characterisation tests, were found to stem from an optimized band gap, minimised electron-hole recombination, and enhanced charge transfer. The effective degradation process, primarily driven by •O₂⁻ and •OH radicals, was confirmed by trapping and ESR analysis. High-performance liquid chromatography (HPLC) and toxicity assessments also revealed that the intermediate degradation products are less harmful, further demonstrating the environmental sustainability of the formulated nanocomposites in treating antibiotic-polluted waters. This study's findings can highlight the potential of MXene-derived nanocomposites for the efficient remediation of antibiotic-contaminated water, offering a cost-effective and scalable approach to mitigating the impact of pharmaceutical pollutants on aquatic ecosystems. • MXene-derived TiO 2 /SiO 2 /Ti 3 C 2 composites were synthesized for antibiotics removal. • Composites effectively removed tetracycline, with maximum 95% degradation. • SiO 2 improved stability, dispersion and photocatalyst durability of nanocomposites. • HPLC showed less harmful intermediates, highlighting SMXT's environmental potential.

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Идентификаторы

DOI: 10.1016/j.envpol.2024.125624

Цитирования и источники

Цитирований: 32Использованных источников: 0

Показатели — AkademScholar