MOF-templated hollow cobalt sulfide as an enhanced Oxone activator for degradation of UV Absorber: Key role of sulfur Vacancy-Induced highly active CoII sites

Modulating Direct Growth of Copper Cobaltite Nanostructure on Copper Mesh as a Hierarchical Catalyst of Oxone Activation for Efficient Elimination of Azo Toxicant

“…It exhibits an oxidation peak, possibly attributed to the oxidation of Cu 2 O to CuO, and the two noticeable reduction bands were due to the reduction of Cu 2+ as well as Cu + . In comparison to the CuOM, the CCMs all exhibited much larger current responses than that of the CuOM, indicating that the growth and decoration of CuCo 2 O 4 on the CM would enhance interfacial reaction rates [30], which would then facilitate the catalytic activation of Oxone. In addition, among these three CCMs, the FCCM exhibited the largest current response, suggesting that the FCCM possessed a much more superior electrochemical performance than the NCCM and the SCCM.…”

“…In addition, among these three CCMs, the FCCM exhibited the largest current response, suggesting that the FCCM possessed a much more superior electrochemical performance than the NCCM and the SCCM. This was possible because the FCCM possessed the larger surface area and porosity which acted as ion reservoirs [28,30], decreasing the diffusion distance to the inner surface and accelerating the diffusion process of ions [31]. Moreover, these CCMs also revealed more redox peaks than the CuOM, demonstrating that the CCMs had more electroactive sites, which also improved their catalytic activities.…”

“…For further investigating the catalytic behaviors of the FCCM, AR degradation was then implemented at various temperatures (30,40, and 50 • C) in Figure 6c. In general, AR degradation was considerably accelerated at higher temperatures by using the FCCM.…”

Enhanced Heterogeneous Catalytic Activity of Peroxymonosulfate for Rhodamine B Degradation via a CoII-Based Metal–Organic Framework

“…PMS is a commercial chemical oxidant widely used in chemical synthesis and environmental remediation, which produces strongly oxidizing SO 4 •– and • OH to degrade organic pollutants in water. Co 2+ is the most efficient transition-metal ion for PMS activation, but the nonrecyclable nature of Co 2+ during degradation cycles poses significant secondary environmental risks, restricting the widespread usage of homogeneous Co 2+ /PMS systems. − Also, photocatalytic chemical oxidation using potent oxidants can be used to degrade organic pollutants. In fact, transition-metal species in metal–organic frameworks (MOFs) have the same function as substitute catalysts to activate oxidants and produce free radicals. − As catalysts for oxidation processes, only a small number of MOFs have been investigated, − and they are less used as catalysts to activate PMS.…”

Emerging investigator series: enhancing the degradation of ciprofloxacin in water using Oxone activated by urchin-like cubic and hollow-structured cobalt@N-doped carbon prepared by etching-engineering: a comparative study with mechanistic and eco-toxic assessments

“…On the other hand, advanced oxidation processes (AOPs) are considered alternative and advantageous approaches to remove refractory organic contaminants from water. 17 Specifically, Oxone-based AOPs have attracted increasing attention as Oxone is a commercial and environmentally friendly oxidant, [18][19][20][21][22] and it could release strong reactive oxygen species (ROS) with high redox potential characteristics, such as sulfate radicals (SO 4 ˙−) (E 0 = 2.5-3.1 eV). Especially, SO 4 ˙− exhibits more superior pH adaptation, longer half-life, and higher selectivity compared with OH˙.…”