Efficient peroxymonosulfate (PMS) activation by visible-light-driven formation of polymorphic amorphous manganese oxides

Enhanced activation of PMS by a novel Fenton-like composite Fe3O4/S-WO3 for rapid chloroxylenol degradation

“…As shown in Table 1 and Fig. 4 c, 80-Fe 3 O 4 /S-WO 3 could completely decompose PMS molecular in 5 min, while other Fenton-like catalysts can’t efficiently activate PMS, such as PC-MnO x (55% in 30 min) [35] , Fe 3+ /MgAl-MoS 4 system (81% in 60 min) [33] and CuCo@ZnO (74.7% in 80 min) [34] . Apart from PMS decomposition efficiency, the PMS utilization efficiency is also an important parameter.…”

“… PC-MnO x acid orange 7 (20 mg/L) [Cat.] = 0.4 g/L, [PMS] = 2 mM, pH 0 = 7.0 95% in 30 min 0.0955 0.0129 55% 0.049 [35] Fe 3+ /MgAl-MoS 4 4-chlorophenol (10 mg/L) [FeCl 3 ·6H 2 O] = 5 mg/L, [Cat.] = 0.1 g/L, [PMS] = 2 mM 100% in 60 min 0.072 — 81% 0.048 [33] FeMgAl-MoS 4 parahydroxy benzoic acid (10 mg/L) [Cat.]…”

“…Compared with Fe 3 O 4 (0.029) and S-WO 3 (0.017) alone, the composite 80-Fe 3 O 4 /S-WO 3 exhibited the highest PMS utilization efficiency (0.128). Furthermore, the 80-Fe 3 O 4 /S-WO 3 still showed outstanding PMS utilization efficiency as compared to PC-MnO x (0.049) [35] , Fe 3+ /MgAl-MoS 4 system (0.048) [33] , CuCo@ZnO (0.2) [34] , Fe 3 O 4 @MoS 2 -3 (0.116) [6] and other reported excellent catalysts. Thanks to the interaction between Fe 3 O 4 and S-WO 3 , the catalytic ability of the composite was dramatically enhanced.…”

State-of-the-Art on the Sulfate Radical-Advanced Oxidation Coupled with Nanomaterials: Biological and Environmental Applications

“…This study demonstrated improved catalytic activity and recyclability for the oxidative degradation of various organic dyes such as tetracyclines and bisphenol A and showed the potential for water remediation ( Figure 3 c) [ 80 ]. In addition to the well-crystallized-phase MnOx, Zhu et al investigated the rarely reported amorphous MnOx (AMO), which has exhibited potent PMS activation properties and has potential applications in wastewater treatment ( Figure 3 d) [ 81 ]. In addition, Similar to NZVI, Shah et al investigated nano-zerovalent manganese (nZVMn, Mn 0 ), which can gradually provide Mn 2+ for the efficient utilization of PDS, showing an outstanding activation efficiency.…”

“…( d ) Schematic illustration of amorphous MnOx. Reprinted with permission from [ 81 ], Copyright 2022, Elsevier. ( e ) Schematic illustration of nano-zerovalent manganese (nZVMn, Mn 0 ) gradually providing Mn 2+ for efficient utilization of PDS.…”