Activation of peroxydisulfate using N-doped carbon-encapsulated Ni species for efficient degradation of tetracycline
关键字：SINGLET OXYGEN; PEROXYMONOSULFATE ACTIVATION; PERSULFATE; PERFORMANCE; CATALYST
摘要：In this study, N-doped porous carbon materials embedded with NiNx species (Ni@NC) were fabricated via the pyrolysis of Ni-doped zeolitic imidazolate frameworks-8 (ZIF-8) at the temperature of 900 degrees C. The obtained Ni@NC-1 catalyst exhibited excellent activity in activating the peroxydisulfate (PDS) that was used for removing tetracycline (TC). The catalytic system exhibited good stability, wide pH adaptation, and high resistance to the operational environment. It was supposed that NiNx species could attach to PDS and act as electron acceptors to receive the electrons for activating the PDS, thus generating highly reactive superoxide radicals (center dot O2- ) and singlet oxygen (1O2) species for rapid degradation of TC. The electron transfer and dissolved oxygen-derived center dot O2- were also responsible for the degradation of TC. In addition, the Ni@NC-1/PDS system exhibited high efficiency for removing oxytetracycline, ciprofloxacin, or levofloxacin. The results of this study would promote the design of other MOFs-derived carbon-encapsulated metal species for efficiently activating persulfate to remove antibiotics from the wastewater.
卷号：276
期号：
是否译文：否
