MOF/bacterial cellulose derived octahedral MnO/carbon nanofiber network: A hybrid for peroxymonosulfate activation toward degradation of tetracycline

Metal-organic frameworks (MOFs) derived materials have distinctive structures and conspicuous catalytic performance, making them extensively employed as catalysts in several fields. Herein, MnO/carbon nanofiber has been successfully generated by pyrolyzing Mn-MOF/bacterial cellulose (BC) composite, in which BC serves as a structural support for the growth of Mn-MOF. The characterizations of field-emission scanning electron microscopy, X-ray diffraction and Fourier-transform infrared spectroscopy demonstrate the effective synthesis of MOFs-derived MnO that maintains its original octahedral structure. MnO/carbon nanofiber is applied as a catalyst to activate peroxymonosulfate (PMS) for the degradation of tetracycline (TC), exhibiting remarkable catalytic activity with 90.59% TC decomposition generated after 30 min. Meanwhile, the removal efficiency for TC remains 83.38% after five cycles. Besides, the quenching experiments confirm not only synergistic effect of radical and non-radical species, but also the vital role of singlet oxygen (1O2) in MnO/CBC-PMS system. This work constructs a new pathway in the preparation of high-performance MOFs-derived metal oxides/carbon materials, which have the potential to enhance the activity in activating peroxymonosulfate for effluent disposal.