Department of Chemistry, Sharif University of Technology, Tehran 11365-11155, Iran; School of Basic Sciences (SB), Institute of Chemical Science and Engineering (ISIC), Group of Advanced Oxidation Processes (GPAO), École Polytechnique Fédérale de Lausanne (EPFL), Station 6, CH-1015 Lausanne, Switzerland; Department of Environmental Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran.
Universidad Politécnica de Madrid (UPM), E.T.S. 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.
J Hazard Mater. 2021 Jul 5;413:125308. doi: 10.1016/j.jhazmat.2021.125308. Epub 2021 Feb 4.
In this work, Ag nanoparticles were loaded on ZIF-67 covered by graphene oxide (Ag/ZIF-67@GO), and its catalytic performance was studied for the heterogeneous activation of peroxymonosulfate (PMS) under visible-light. The catalyst surface morphology and structure were analyzed by FT-IR, XRD, XPS, DRS, FE-SEM, EDX, TEM, BET, ICP-AES and TGA analysis. The efficacy of PMS activation by the Ag/ZIF-67@GO under visible light was assessed by phenol degradation and E. coli inactivation. Phenol was completely degraded within 30 min by HO, SO and O generated through the photocatalytic PMS activation. In addition, total E. coli inactivation was attained in 15 min that confirmed the highly efficient catalytic activation of PMS by the as-made nanocomposite under visible light. The reaction mechanism was elucidated and the importance of the generated reactive species followed the order of: HO > SO > O > h, implying a radical-pathway dominated process.
在这项工作中，Ag 纳米颗粒负载在被氧化石墨烯（Ag/ZIF-67@GO）覆盖的沸石咪唑酯骨架-67（ZIF-67）上，并研究了其在可见光下对过一硫酸盐（PMS）的非均相活化的催化性能。通过傅里叶变换红外光谱（FT-IR）、X 射线衍射（XRD）、X 射线光电子能谱（XPS）、漫反射光谱（DRS）、场发射扫描电子显微镜（FE-SEM）、能谱仪（EDX）、透射电子显微镜（TEM）、比表面积和孔径分布（BET）、电感耦合等离子体原子发射光谱（ICP-AES）和热重分析（TGA）对催化剂的表面形貌和结构进行了分析。通过苯酚降解和大肠杆菌失活评估了 Ag/ZIF-67@GO 在可见光下对 PMS 的活化效果。HO、SO 和 O 通过光催化 PMS 活化生成，在 30 分钟内完全降解了苯酚。此外，在 15 分钟内实现了大肠杆菌的完全失活，这证实了所制备的纳米复合材料在可见光下对 PMS 的高效催化活化。阐明了反应机制，生成的活性物质的重要性遵循 HO > SO > O > h 的顺序，这意味着反应遵循自由基途径。
