Insights into the mechanism of persulfate activation by hollow MOF-derived carbon: electron transfer-triggered non-radical oxidization for antibiotic removal

Abstract

Non-radical oxidation triggered by hollow MOFs-derived carbon in persulfate-based AOPs are potential for antibiotic wastewater remediation. However, the inherent relationship between hollow structure and catalytic activity and mechanism evolution involving...

Understanding the active sites and associated reaction pathways of metal-free carbocatalysts in persulfate activation and pollutant degradation

“…Environmental Science: Nano Critical review Sp 2 carbon network structure Mostly, the reduction of GO and oxidized CNTs to produce RGO and thermally annealed CNTs, respectively, is resorted to recover the sp 2 carbon network capable of shuttling electrons and hence enhance the catalytic performance for PMS/PDS activation. 61 Meanwhile, the adsorption interactions with PDS are enhanced when amorphous carbon is reformed to sp 2 hybridized graphene by flash Joule heating (the PDS adsorption energies on the graphene and amorphous models were calculated to be −9.67 and −7.50 eV, respectively), as shown in Fig. 4a and b.…”

“…The increasing environmental pollution with the fast development of various industries calls for efficient and lowcost methods to remove the toxic and refractory pollutants from water radically. [1][2][3][4] The current methods involve adsorption, [5][6][7] Fenton oxidation, 8,9 Fenton-like oxidation, 10,11 electro-Fenton, 12,13 photo-Fenton, 14,15 electrochemical oxidation, 16,17 photocatalysis [18][19][20][21] and others. [22][23][24][25][26] Among these methods, Fenton-like oxidation based on peroxomonosulfate (PMS) and peroxydisulfate (PDS) has attracted significant attention due to its long life spans, strong oxidation ability, ease of storing and transporting PMS/PDS relative to liquid H 2 O 2 , applicability to a diversity of refractory organic pollutants, and capability to withstand a wide pH range, which is superior to the Fenton process requiring H 2 O 2 as the reactant, thus causing the storage and delivery to be difficult.…”