Goethite-MoS2 hybrid with dual active sites boosted peroxymonosulfate activation for removal of tetracycline: The vital roles of hydroxyl radicals and singlet oxygen

Surface Nitrogen-Doped Carbon Decoration of Co Catalyst Supported on Mesoporous Carbon to Boost Peroxymonosulfate Activation for Antibiotics Degradation

“…In addition to quenching experiments, TEMP and DMPO were used as spin traps to determine the presence of 1 O 2 and other relevant radicals. As shown in Figure b, the EPR profile presents a strong TEMP– 1 O 2 signal, which can be attributed to (i) the reaction of HSO 5 – and SO 5 2– () during self-PMS activation induced by O L species in the catalyst (confirmed by the XPS results discussed above) and (ii) the formation of reactive oxygen (O*) that can activate PMS and generate nonradical 1 O 2 species ( and ) . Additionally, Figure d confirms the presence of DMPO– • OH and DMPO–SO 4 •– , which is consistent with the quenching experiment results.…”

“…As shown in Figure 7b, the EPR profile presents a strong TEMP− 1 O 2 signal, which can be attributed to (i) the reaction of HSO 5 − and SO 5 2− (R8) during self-PMS activation induced by O L species in the catalyst (confirmed by the XPS results discussed above) 46 and (ii) the formation of reactive oxygen (O*) that can activate PMS and generate nonradical 1 O 2 species (R9 and R10). 52 Additionally, Figure 7d confirms the presence of DMPO− • OH and DMPO−SO 4…”

Integrating energy-environmental functions into multifaceted lignocellulose valorization: high-performance supercapacitors and antibiotic decomposition

“…The reaction between SO 4 ˙ − and water molecules or OH − could also generate ˙OH, suggesting that the generation of ˙OH might involve SO 4 ˙ − sacrifice. 48 Moreover, O 2 ˙ − could be formed through the interplay between PDS and H 2 O or Co sites and molecular oxygen, and 1 O 2 is potentially formed by persulfate self-decay or reaction with O 2 ˙ − and ˙OH. 48 The real-time evolution of these ROS is a sign that their contribution is dynamic.…”

“…48 Moreover, O 2 ˙ − could be formed through the interplay between PDS and H 2 O or Co sites and molecular oxygen, and 1 O 2 is potentially formed by persulfate self-decay or reaction with O 2 ˙ − and ˙OH. 48 The real-time evolution of these ROS is a sign that their contribution is dynamic. In Fig.…”

Evolution of singlet oxygen in peroxymonosulfate activation: a review

“…The formation of 1 O 2 occurs mainly through a non-radical pathway, whereas the formation of SO 4 À and OH radicals occurs via a radical pathway. [8][9][10][11][12] In comparison to SO 4 À and OH radicals, singlet oxygen possesses advantages: (1) higher selectivity toward electron-rich organic complexes owing to its electrophilic attributes, 13,14 so as to preferentially degrade pharmaceuticals and endocrine-disrupting compounds (EDCs) in the presence of inorganic ions and organic compounds 13,14 and disinfect toxic pathogens (e.g., E. coli and the MS-2 bacteriophage); 15,16 (2) higher resistance to frequently-used free radical scavengers, such as methanol and tert-butanol.…”