Herein, the novel application of ZIF-67 derived HCo@NC as a highly active and stable catalyst for Fenton treatment of organic wastewater is discussed. The carbonization of the Cobalt based Zeolitic Imidazolate Framework-67 (ZIF-67) yielded of HCo@NC~700 nm shows a hollow structure inheriting the rhombic dodecahedron shape of the precusor ZIF-67. XPS analysis reveales the coexistence of Co2+ and Co0. The treatment of Tetracycline (TC) in HCo@NC catalyzed Fenton system indicates that hydroxyl radicals generated to oxidize TC to decompose, and the optimal condition is determined to be 0.71 mmol·L-1 H2O2 and 0.03 g·L-1 HCo@NC at pH 3 for the treatment of 15 mg·L-1 TC. H2O2 is catalyzed by HCo@NC to decompose to hydroxyl radicals for the degradation of TC, and the reaction mechanism is proposed.
