부산대학교 도서관

Keywords Peroxymonosulfate activation; Photocatalytic oxidation; Ternary nanocomposites; Cefixime degradation; Wastewater treatment Highlights * A novel Z-scheme, ZnO-based photocatalyst (ZSCF@CNT) was prepared to activate PMS. * Heterojunction type-I and S-scheme mechanisms were explained in detail. * Strong synergistic effect was found between PMS and the photocatalyst on CFX degradation. * Both radical and non-radical pathways contributed towards CFX degradation over ZSCF@CNT/PMS/UVC. * The ZSCF@CNT/PMS/UVC system showed high reuse potential in CFX elimination. Abstract In this study, a ternary ZnO@spinel cobalt ferrite@carbon nanotube magnetic photocatalyst (ZSCF@CNT) was successfully synthesized and used to activate peroxymonosulfate (PMS) for Cefixime (CFX) antibiotic degradation under UVC irradiation. The morphology, optical, structural, and physicochemical properties of ZSCF@CNT were characterized and analyzed by XPS, XRD, FESEM-EDX, TEM, BET, VSM, UV--vis DRS and PL analysis. The results indicated that the ternary ZSCF@CNT photocatalyst exhibited superior catalytic activity on CFX elimination than that of individual components and binary composite catalysts, in which CFX with was rapidly removed under UVC irradiation and PMS. The effect of operational parameters including initial PMS, catalyst, and CFX concentrations and solution pH on the catalytic activity was investigated in detail; the optimal conditions were: pH: 7.0, catalyst: 0.3 g/L, PMS: 3.0 mM, leading to total CFX (10 mg/L) elimination in ~20 min. Based on the radical scavenger tests, various radicals and non-radical species including sulfate, hydroxyl and superoxide radicals, singlet oxygen and electrons were involved in the ZSCF@CNT/PMS/UVC system. The high surface area, reduced agglomeration formation and excellent separation of photogenerated electron-hole pairs embodied in ZSCF@CNT photocatalyst conferred its superior catalytic activity and stability. The results from the tests in real water matrices revealed that ZSCF@CNT could be a promising photocatalyst to activate PMS for actual aqueous matrices' treatment. Author Affiliation: (a) School of Environmental Studies, China University of Geosciences, Wuhan, 430074, PR China (b) Universidad Politécnica de Madrid, E.T.S. de Ingenieros de Caminos, Canales y Puertos, Departamento de Ingeniería Civil: Hidráulica, Energía y Medio Ambiente, Unidad Docente Ingeniería Sanitaria, C/ Profesor Aranguren, S/n, ES, 28040, Madrid, Spain (c) Research Center for Health, Safety and Environment, Alborz University of Medical Sciences, Karaj, Iran (d) Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran (e) Department of Environmental Health Engineering, Faculty of Public Health, Iran University of Medical Sciences, Tehran, Iran (f) Department of Environmental Health Engineering, Alborz University of Medical Sciences, Karaj, Iran * Corresponding author. Research Center for Health, Safety and Environment, Alborz University of Medical Sciences, Karaj, Iran. Article History: Received 27 September 2022; Revised 10 December 2022; Accepted 11 December 2022 Byline: Na Tian (a,b), Stefanos Giannakis (b), Leila Akbarzadeh (c), Farzad Hasanvandian (d), Emad Dehghanifard (e), Babak Kakavandi [kakavandibvch@gmail.com] (c,f,*)