Micrometer-sized NiOOH hierarchical spheres for enhanced degradation of sulfadiazine via synergistic adsorption and catalytic oxidation in peroxymonosulfate system

Lyu, Cong; Zhang, Lu; He, Dannong; Su, Boyuan; Lyu, Ying

doi:10.1016/j.cclet.2021.07.012

Cited by 39 publications

(7 citation statements)

References 44 publications

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“…53,54 In addition, the O 1s spectrum of 5N-15ZnS/CdS (Fig. 7f) can be fitted into three components at 529.8, 531.2, and 533.0 eV, corresponding to the Ni–O bonds, 55 –OH groups, 56 and adsorbed H 2 O, 57 respectively. The existence of Ni 3+ ions, Ni–O bonds, and –OH groups confirms the formation of NiOOH in the 5N-15ZnS/CdS composite.…”

Section: Resultsmentioning

confidence: 97%

Spatially ordered NiOOH-ZnS/CdS heterostructures with an efficient photo-carrier transmission channel for markedly improved H₂ production

Xin,

Qiu,

Jiang

et al. 2024

Dalton Trans.

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Section: Resultsmentioning

confidence: 97%

Spatially ordered NiOOH-ZnS/CdS heterostructures with an efficient photo-carrier transmission channel for markedly improved H₂ production

Xin,

Qiu,

Jiang

et al. 2024

Dalton Trans.

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“…In conclusion, the ZnO/ZnMn 2 O 4 /PMS system not only shows strong degradation effects on the removal of 2, 4‐DCP, but also has effective degradation activity for various organic pollutants, despite differences in their degradation speeds due to their chemical structures. Therefore, the ZnO/ZnMn 2 O 4 /PMS system has universal applicability for degrading various pollutants, which presents comparable activation capability to PMS compared with many other catalysts (Lyu et al, 2022; Wang et al, 2022).…”

Section: Resultsmentioning

confidence: 99%

Degradation of 2, 4‐dichlorophenol by peroxymonosulfate catalyzed by ZnO/ZnMn₂O₄

Ruan,

Wang,

Huang

et al. 2024

Water Environment Research

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In this study, a highly efficient peroxymonosulfate (PMS) activator, ZnO/ZnMn2O4, was synthesized using a simple one‐step hydrothermal method. The resulting bimetallic oxide catalyst demonstrated a homogenous and high‐purity composition, showcasing synergistic catalytic activity in activating PMS for degrading 2, 4‐dichlorophenol (2, 4‐DCP) in aqueous solution. This catalytic performance surpassed that of individual ZnO, Mn2O3, and ZnMn2O4 metal materials. Under the optimized conditions, the removal efficiency of 2, 4‐DCP reached approximately 86% within 60 min, and the catalytic ability remained almost constant even after four cycles of recycling. The developed degradation system proved effective in degrading other azo‐dye pollutants. Certain inorganic anions such as HPO4−, HCO3−, and NO3− significantly inhibited the degradation of 2, 4‐DCP, while Cl− and SO42− did not exhibit such interference. Results from electrochemical experiments indicated that the electron transfer ability of ZnO/ZnMn2O4 surpassed that of individual metals, and electron transfer occurred between ZnO/ZnMn2O4 and the oxidant. The primary active radicals responsible for degrading 2, 4‐DCP were identified as SO4•−, OH• and O2•−, generated through the oxidation and reduction of PMS catalyzed by Zn (II) and Mn (III). Furthermore, X‐ray photoelectron spectroscopy (XPS) analysis of the fresh and used catalysts revealed that the exceptional electron transfer ability of ZnO facilitated the valence transfer of Mn (III) and the transfer of electrons to the catalyst's oxygen surface, thus enhancing the catalytic efficiency. The analysis of radicals and intermediates indicates that the two main pathways for degrading 2, 4‐DCP involve hydroxylation and radical attack on its aromatic ring.Practitioner Points A bimetallic ZnO/ZnMn2O4 catalyst was synthesized and characterized. ZnO/ZnMn2O4 can synergistically activate PMS to degrade 2, 4‐DCP compared with single metal oxide. Three primary active radicals, O2•−, •OH, and SO4•−, were generated to promote the degradation. ZnO promoted electron transfer among the three species of Mn to facilitate oxidizing pollutants. Hydroxylation and radical attack on the aromatic ring of 2, 4‐DCP are the two degradation pathways.

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“…17,18 Heterogeneous catalysts, such as Co 3 O 4 , are more suitable for large-scale wastewater treatment, evidenced by their effective activation of PMS for 2,4-dichlorophenol degradation and reduced metal ion concentration in effluent. 19 Other transition metals and metal oxides, including manganese, 20 iron, 21,22 nickel, 23 copper, 24 have also been explored for PMS activation. However, their practical application is hindered by the inefficient conversion of high-valent metals to their low-valent states, resulting in poor stability and limited recovery of active sites.…”

Section: Introductionmentioning

confidence: 99%

“…Co 2+ has shown superior PMS activation efficiency in homogeneous reactions, but the performance of transition metal ions in PMS activation is affected by water system pH, and their homogeneous catalytic use poses recovery challenges, potentially leading to secondary water pollution. , Heterogeneous catalysts, such as Co 3 O 4 , are more suitable for large-scale wastewater treatment, evidenced by their effective activation of PMS for 2,4-dichlorophenol degradation and reduced metal ion concentration in effluent . Other transition metals and metal oxides, including manganese, iron, , nickel, and copper, have also been explored for PMS activation. However, their practical application is hindered by the inefficient conversion of high-valent metals to their low-valent states, resulting in poor stability and limited recovery of active sites.…”

Section: Introductionmentioning

confidence: 99%

N-Doped Co–Mn/C Dual Metal Oxide as an Activator of Peroxymonosulfate Considering Radical and Nonradical Pathways

Sun,

Li,

et al. 2024

ACS Appl. Nano Mater.

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The Mn–Co dual-metal oxide is recognized as an effective activator for peroxymonosulfate (PMS), but its activation mechanism remains controversial. In this study, a Co/Mn–C–N (CMCN) nanocatalyst was synthesized using a simple pyrolysis method, and its catalytic activity along with the PMS activation mechanism was comprehensively explored. The findings indicated that the synergistic effect of Mn and Co within the bimetallic composition significantly enhanced the catalytic efficiency of CMCN compared to those of individual metal oxides (Mn–C–N and Co–C–N). Bisphenol A underwent successful degradation within 3 min in a neutral environment, with a degradation kinetic rate of 1.59 min–1 and a total organic carbon removal efficiency of 63.8%. Moreover, CMCN nanoparticles demonstrated remarkable stability and reusability, maintaining their efficacy over four cycles. Employing a series of experiments and analytical characterizations, a novel activation mechanism for PMS was proposed, involving both radical and nonradical pathways. This mechanism involves the oxidation of organic pollutants through a direct electron transfer process from metastable intermediate complexes. Notably, the CMCN/PMS system exhibited a robust resistance to interference factors. This research provides novel insights into the development of bimetallic oxide composites for the effective removal of recalcitrant water pollutants.

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Micrometer-sized NiOOH hierarchical spheres for enhanced degradation of sulfadiazine via synergistic adsorption and catalytic oxidation in peroxymonosulfate system

Cited by 39 publications

References 44 publications

Spatially ordered NiOOH-ZnS/CdS heterostructures with an efficient photo-carrier transmission channel for markedly improved H₂ production

Spatially ordered NiOOH-ZnS/CdS heterostructures with an efficient photo-carrier transmission channel for markedly improved H₂ production

Degradation of 2, 4‐dichlorophenol by peroxymonosulfate catalyzed by ZnO/ZnMn₂O₄

N-Doped Co–Mn/C Dual Metal Oxide as an Activator of Peroxymonosulfate Considering Radical and Nonradical Pathways

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Micrometer-sized NiOOH hierarchical spheres for enhanced degradation of sulfadiazine via synergistic adsorption and catalytic oxidation in peroxymonosulfate system

Cited by 39 publications

References 44 publications

Spatially ordered NiOOH-ZnS/CdS heterostructures with an efficient photo-carrier transmission channel for markedly improved H2 production

Spatially ordered NiOOH-ZnS/CdS heterostructures with an efficient photo-carrier transmission channel for markedly improved H2 production

Degradation of 2, 4‐dichlorophenol by peroxymonosulfate catalyzed by ZnO/ZnMn2O4

N-Doped Co–Mn/C Dual Metal Oxide as an Activator of Peroxymonosulfate Considering Radical and Nonradical Pathways

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Spatially ordered NiOOH-ZnS/CdS heterostructures with an efficient photo-carrier transmission channel for markedly improved H₂ production

Spatially ordered NiOOH-ZnS/CdS heterostructures with an efficient photo-carrier transmission channel for markedly improved H₂ production

Degradation of 2, 4‐dichlorophenol by peroxymonosulfate catalyzed by ZnO/ZnMn₂O₄