A micron-sized Co-MOF sheet to activate peroxymonosulfate for efficient organic pollutant degradation

Abstract

A Co-MOF with 2D morphology (BUC-92) was prepared, which exhibited outstanding Rhodamine B (RhB) degradation performance via peroxymonosulfate (PMS) activation. Complete RhB was degraded within 10 min in presence of...

Role of Interface of Metal–Organic Frameworks and Their Composites in Persulfate-Based Advanced Oxidation Process for Water Purification

“…Abundant mixed-valence CUS with vacant p orbitals can further act as Lewis acid sites to provide floors for oxidant activation . The most reported CUS as active metal sites for PS activation included Fe­(II) CUS in Fe MOFs, ,− Co­(II) CUS in Co MOFs, ,,− and mixed-metal CUS such as Fe­(II)/Co­(II)-, ,,− Cu­(II)/Co­(II)-, Fe­(II)/Cu­(II)-, , and Mn/Fe-containing MOFs. , Generally, these metal CUS of M n + /M ( n +1)+ can undergo mutual transformation during the PS activation. The CUS commonly work as a single electron channel for the single metal MOFs, not directly involved in the reaction.…”

“…The redox cycle of Co­(II)/Co­(III) was the key factor in activating PMS to generate radicals to degrade DPB . Wang et al synthesized two kinds of Co-MOFs, noted Co-H 6 chhc, BUC-92, and BUC-67, respectively. , Co 2+ in MOFs, as the main active metal site, provided electrons to PMS and generated active SO 4 •– , leading to the oxidative decomposition of atrazine (ATZ) and RhB, respectively. The Co valence state in MOFs changed between +2 and +3 and continued cycling when Co­(II) or Co­(III) reacted with PMS to generate SO 4 •– and SO 5 •– (eqs and ).…”

“…85 Wang et al synthesized two kinds of Co-MOFs, noted Co-H 6 chhc, BUC-92, and BUC-67, respectively. 55,86 Co 2+ in MOFs, as the main active metal site, provided electrons to PMS and generated active SO 4…”

Efficient pollutant degradation by peroxymonosulfate activated by a Co/Mn metal–organic framework

“…For example, Li et al 8 first utilized a cobalt-MOF as a heterogeneous catalyst for activating PMS to remove dibutyl phthalate. In our group, various MOFs (like BUC-92, 9 S-BUC-21(Fe), 10 Co-tib, 11 etc .) were synthesized, which demonstrated the excellent catalytic activity of PMS to decompose organic pollutants.…”

Activation of peroxymonosulfate by palygorskite supported Co–Fe for water treatment

“…MeOH is a typical scavenger for cOH (k = 9.7 × 10 8 M −1 s −1 ) and SO 4 c − (k = 2.5 × 10 7 M −1 s −1 ), and TBA is widely used as a selective radical scavenger for cOH with the rate constant of 3.6-7.6 × 10 8 M −1 s −1 . 37,38 Fig. 12a illustrates the degradation efficiency of RhB in the presence of MeOH and TBA.…”