Defect-rich carbon based bimetallic oxides with abundant oxygen vacancies as highly active catalysts for enhanced 4-aminobenzoic acid ethyl ester (ABEE) degradation toward peroxymonosulfate activation

MoS2-assisted Fe2+/peroxymonosulfate oxidation for the abatement of phenacetin: efficiency, mechanisms and toxicity evaluation

“…p -BQ was added to the reaction solution to further investigate the role of O 2 ˙ − because it can react with O 2 ˙ − with a second-order rate constant of (0.9–1.0) × 10 9 M −1 s −1 . 36 Our results show that the PNT removal rate decreased to 41.2% after the addition of 0.5 mM p -BQ, which indicated that O 2 ˙ − also participated in the degradation of PNT. Next, TEMP was added to the reaction solution to investigate the behavior of 1 O 2 .…”

“…The relatively weak signal of DMPO–SO 4 ˙ − was attributed to the lower sensitivity and shorter lifetime of the DMPO–SO 4 ˙ − peak. 36 The peak of DMPO–O 2 ˙ − ( α N = 17.4 G) adduct was also clearly detected. Fig.…”

Fine-Tuning Radical/Nonradical Pathways on Graphene by Porous Engineering and Doping Strategies

“…The KOH activation process increases the atomic ratios of the heteroatoms and the SSA of N,S-G, as well as creating massive carbon defects on the graphene surface, which facilitates the generation of delocalized electrons at the defective sites. 62,63 It has been reported that the delocalized electrons are closely related to O 2…”

“…• OH and SO 4 •– are the main free radicals in the N,S-G@PMS system. The KOH activation process increases the atomic ratios of the heteroatoms and the SSA of N,S-G, as well as creating massive carbon defects on the graphene surface, which facilitates the generation of delocalized electrons at the defective sites. , It has been reported that the delocalized electrons are closely related to O 2 •– formation. , Therefore, the KOH activation further enhances the generation of • OH, SO 4 •– and involves the O 2 •– in the N,S-G-KOH@PMS system.…”

Visible Light Driven Spherical CuBi2O4 with Surface Oxygen Vacancy Enhanced Photocatalytic Activity: Catalyst Fabrication, Performance, and Reaction Mechanism

“…In conclusion, as the CuBi 2 O 4 -OVs catalyst was irradiated by visible LED light, the production of photo-generated hole and electrons occurred, which would react with PMS to generate free radicals. PMS was applied as the electron acceptor and the oxidant in the heterogeneous SR-photo-Fenton like reaction, which suppressed the recombination of holes and electrons, leading to better degradation efficiency [53]. As the surface oxygen vacancy was presented on the surface of catalyst, the free radicals were quickly formed owing to the quick transmission of photo-generated carriers and good separation efficiency of the pairs.…”