Facile synthesis of Mn-doped BiOCl for metronidazole photodegradation: Optimization, degradation pathway, and mechanism

Template-free synthesis of Mn2+ doped hierarchical CuS yolk–shell microspheres for photocatalytic reduction of Cr(vi)

“…In addition, the Mn dopant acts as an electron trap and promotes the effective photoinduced charge carrier separation. 56 Under photocatalytic conditions, photoexcited electrons can be trapped by the doped Mn species (Mn 2+ /Mn 3+ ) 57 and facilitate the inhibition of electron-hole recombination, leading to a better photocatalytic activity of YS Mn-CuS compared to that of FL CuS.…”

Recent advances in bismuth oxyhalide photocatalysts for degradation of organic pollutants in wastewater

“…Moreover, Mn cations in doped BiOCl generated abundant active oxygen species. 76 Therefore, Mn-doped BiOCl photocatalysts have been reported for degrading 94.3% metronidazole (MTZ) in 15 min under simulated sunlight, degrading 98% malachite green in 120 min under visible light, 77 and removing 58.8% Rh B in 120 min under UV irradiation. 78 Therefore, Mn-BiOCl can be used to treat various wastewaters containing antibiotics or organic dyes.…”

Fluidized ZnO@BCFPs Particle Electrodes for Efficient Degradation and Detoxification of Metronidazole in 3D Electro-Peroxone Process

“…Furthermore, a total of 12 intermediate products generated at reaction times of 10, 20, and 40 min in the 3D + O 3 system were identified by LC-MS, and possible degradation pathways were proposed as illustrated in Figure 10 . In pathway 1, the lateral N-ethanol group on metronidazole was directed and oxidized to product A and was then decarboxylated to product B (2-methyl-5-nitroimidozole), or A underwent hydroxylation of the nitro group to form D [ 3 , 55 ], and was further oxidized to E. In pathway 2, the nitro-hydroxylation product C of metronidazole was oxidized to D and then to F. In pathway 3, as previously reported [ 56 ], it began with a series of reduction reactions of the lateral nitro group to the nitroso product F, hydroxylamine product G and amino product H. After the N-ethanol group was oxidized to product I by active species, the C–N group on the imidazole ring was further oxidized and destroyed to form product J. In pathway 4, the N-denitration product K of metronidazole was generated [ 56 , 57 ], and then, the lateral methyl group was oxidized to carboxyl group to form product L. In conclusion, metronidazole was degraded into intermediates through hydroxyethyl cleavage, hydroxylation, nitro-reduction, N-denitrification, ring-opening, and other processes.…”