High performance of Mn2(BDC)2(DMF)2-derived MnO@C nanocomposite as superior remediator for a series of emergent antibiotics

yMetal-organic frameworks (MOFs) present as ideal platforms towards synthesizing metals/metal oxides self-supported in porous carbon matrix. Herein, we described an effective strategy to transform manganese-based MOFs, namely Mn-2(BDC)(2)(DMF)(2), into MnO@C porous nanocomposite via a facile and one-pot pyrolysis procedure. Fourier-transforminfrared spectroscopy (FT-IR) results indicated the transformation of coordination bonds into ionic bonds of Mn(II)-O. The morphological profiles also elucidated the MnO nanoparticles embedded carbonaceous structure while other physicochemical techniques such as X-ray photoelectron spectroscopy (XPS) demonstrated the important chemical bonds (e.g. C-C in aromatic rings, C-O in phenolic/alcoholic groups, C=O in carbonyl groups, and O-C=O in carboxyl groups, etc.) on MnO@C surface. Uptake application of MnO@C for a wide range of antibiotic contaminants involving tetracycline (TCC), ciprofloxacin (CFX), diclofenac (DCF) and chloramphenicol (CAP) in aqueous phases was notably reported. Through the nonlinearization of kinetic and isotherm models, validation for maximum adsorption capacities could be attainable, at 79.9 mg/g (CAP) < 92.4 mg/g (DCF) < 170.3mg/g (TCC) < 235.6mg/g (CFX), indicating the great potential ofMnO@C nanocomposite for removing many kinds of emergent antibiotics from the wastewater. (C) 2020 Elsevier B.V. All rights reserved.