Intensification of van der Waals interaction for efficient peroxymonosulfate activation and accuracy re-evaluation of quenching experiments for reactive oxidation species identification

Fast Degradation of Rhodamine B by In Situ H2O2 Fenton System with Co and N Co-Doped Carbon Nanotubes

“…The energy dispersive X-ray spectroscopy (EDS) elemental mapping of a selected area on the Co-N-C composite ( Figure 3 e–i) revealed the existence of cobalt nanoparticles at the enclosed end of CNTs and uniform distributions of the N, O and C elements across the tubular structure, which demonstrated the successful incorporation of Co, N and O into the carbon substrate. During the process of pyrolysis, the entrapped cobalt acted as a catalyst to promote the formation of carbon nanotubes [ 4 , 27 ].…”

“…In addition to the Co ions, the metallic Co 0 also played a role in activating E-Fenton. H 2 O 2 and •OH could be generated from a Co 2+ /Co 3+ redox cycle of the cobalt element during the E-Fenton process (Equations (1)–(4)), which ensured a high removal rate of RhB in this system [ 4 ]. The EPR results in Figure 7 e reveal the existence of •OH, in which the four-line signal with an intensity ratio of 1:2:2:1 was attributed to DMPO-•OH.…”

“…The electro-Fenton process based on hydroxyl radicals has attracted widespread attention due to its environmental friendliness, high efficiency and energy-saving properties [ 1 , 2 ], during which, H 2 O 2 is formed in situ by the reaction of the two-electron reduction of O 2 (2e-ORR) on the cathode [ 3 , 4 ]. Then, the in situ-produced H 2 O 2 reacts with the metal catalyst to produce radical •OH.…”

Spontaneous FeIII/FeII redox cycling in single-atom catalysts: Conjugation effect and electron delocalization

“…The absence of a negative effect of excessive PMS suggested pollutant degradation by the electron transfer process caused by the surface-activated PMS. 17 , 42 By using AAP as an example, increasing the initial pH inhibited the AAP degradation, with a decrease in the reaction rate to its lowest of 0.07 min −1 at the initial pH of 9.67 ( Figure S4 A). The zero-point charge of I-SACs was measured as 4.4 ( Figure S4 A inset), indicating a positively charged surface in solution with a pH lower than 4.4.…”

Electrocatalytic Degradation of Levofloxacin Wastewater by Ni Single-Atom-Kernelled Ru Nanocluster Particles

“…6A-6B). Methanol (MeOH) is often used as an inhibitor of hydroxyl radical and sulfate radical, t-butanol (TBA) is a frequently-used hydroxyl radical inhibitor, and catalase is a common inhibitor for singlet oxygen [47][48][49]. Fig.…”