Enhanced removal of lomefloxacin based on peroxymonosulfate activation by Co3O4/δ-FeOOH composite

A FeCo2O4 nanowire array enabled electrochemical nitrate conversion to ammonia

“…2d can be deconvoluted into three peaks at 530.2, 531.3, and 532.8 eV, corresponding to metal–oxygen bonds (Fe–O and Co–O), metal–hydroxyl bonds (Fe–OH and Co–OH), and adsorbed surface hydroxyl groups (–OH), respectively. 48,49 All of the above results indicate the purity of the as-synthesized FeCo 2 O 4 /CC.…”

Oxygen vacancy enhances the catalytic activity of trimetallic oxide catalysts for efficient peroxymonosulfate activation

“…Additionally, BPA, BPB, LVF, ENR, TC, RhB and MO with the same concentration (0.05 mM) were also selected as typical organic contaminants to identify the effectiveness of the v-Co 3 O 4 @EMR system. The anti-interference experiments were conducted using Cl − , HPO 4 2− , HCO 3 − and HA as common distractors. After the reaction, the suspension was centrifuged, and the v-Co 3 -O 4 @EMR powder was collected using an external magnetic field and washed with ultrapure water several times, and then dried at 60 °C for recycling tests.…”

“…The generated sulfate radicals (SO 4 ˙−) with higher oxide ability (2.5-3.1 V), longer lifetime (30-40 μs) and excellent selectivity are more effective than traditional hydroxyl radicals (˙OH, 1.9-2.8 V, 20 ns) for the degradation of recalcitrant organic contaminants. [3][4][5] In order to produce plentiful SO 4 ˙−, transition metal oxides catalysts are frequently used to activate PMS or persulfate (PS). [6][7][8] Compared with monometallic catalysts, the bimetallic oxide exhibits a synergistic effect between two metal compositions, which can improve the degradation capacity, catalyst stability and recovery efficiency.…”

Decomposition and mineralization of glyphosate herbicide in water by radical and non-radical pathways through peroxymonosulfate activation using Co3O4/g-C3N4: a comprehensive study

“…25,26 However, Co 3 O 4 is unstable and easily dissolves in solution; thus, the use of single Co 3 O 4 in environmental catalysis is limited by its secondary pollution. Therefore, to improve its catalytic activity and stability, Co 3 O 4 was synthesized on different substrates for removing organics via PMS activation, such as Co 3 O 4 /graphene for orange II, 27 Co 3 O 4 /g-C 3 N 4 for diclofenac sodium, 28 Co 3 O 4 /C for bisphenol A, 29 Co 3 O 4 / δ -FeOOH for lomefloxacin, 30 and CuO–Co 3 O 4 –CeO 2 for 2,4-D. 31…”

“…25,26 However, Co 3 O 4 is unstable and easily dissolves in solution; thus, the use of single Co 3 O 4 in environmental catalysis is limited by its secondary pollution. Therefore, to improve its catalytic activity and stability, Co 3 O 4 was synthesized on different substrates for removing organics via PMS activation, such as Co 3 O 4 /graphene for orange II, 27 Co 3 O 4 /g-C 3 N 4 for diclofenac sodium, 28 Co 3 O 4 /C for bisphenol A, 29 Co 3 O 4 /δ-FeOOH for lomefloxacin, 30 and CuO-Co 3 O 4 -CeO 2 for 2,4-D. 31 On the other hand, graphite carbon nitride (g-C 3 N 4 ) consists of layers stacked along the axis to graphite layers composed of hexagonal rings of triazine (C 3 N 3 ) and tri-striazine (heptazine, C 6 N 7 ) structural units. It is a potential non-metallic photocatalyst due to its low bandgap energy for visible light use (2.63-2.72 eV), easy synthesis, thermal stability (up to 600 °C), low production cost, and environmental friendliness.…”