Catalytic degradation of ciprofloxacin by a visible-light-assisted peroxymonosulfate activation system: Performance and mechanism

Chen, Fei; Huang, Gui‐Xiang; Yao, Fubing; Yang, Qi; Zheng, Yu-Ming; Zhao, Qiang; Yu, Han‐Qing

doi:10.1016/j.watres.2020.115559

Cited by 333 publications

(67 citation statements)

References 62 publications

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“…As illustrated in Supplementary Fig. 44a , EPR signals corresponding to •OH and SO 4 •− were detected in all samples 49 . The intensity of these two radicals for type B heterostructure under irradiation is higher than that of type B in dark, ZIF-8, MIL-125, ZIF-67 and type b under irradiation, indicating that the activation of PMS is enhanced by the photocatalytic property of type B catalyst.…”

Section: Resultsmentioning

confidence: 72%

Ternary MOF-on-MOF heterostructures with controllable architectural and compositional complexity via multiple selective assembly

et al. 2020

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Assembly of different metal-organic framework (MOF) building blocks into hybrid MOF-on-MOF heterostructures is promising in chemistry and materials science, however the development of ternary MOF-on-MOF heterostructures with controllable architectural and compositional complexity is challenging. Here we report the synthesis of three types of ternary MOF-on-MOF heterostructures via a multiple selective assembly strategy. This strategy relies on the choice of one host MOF with more than one facet that can arrange the growth of a guest MOF, where the arrangement is site-selective without homogenous growth of guest MOF or homogenous coating of guest on host MOF. The growth of guest MOF on a selected site of host MOF in each step provides the opportunity to further vary the combinations of arrangements in multiple steps, leading to ternary MOF-on-MOF heterostructures with tunable complexity. The developed strategy paves the way towards the rational design of intricate and unprecedented MOF-based superstructures for various applications.

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Section: Resultsmentioning

confidence: 72%

Ternary MOF-on-MOF heterostructures with controllable architectural and compositional complexity via multiple selective assembly

et al. 2020

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“…In that case, energy requirements are significantly reduced, thus lowering the cost of the treatment. Moreover, in heterogeneous systems, the non-occurrence of metal ions in aqueous solutions prevents the secondary contamination of water [11], thus multiplying the benefits of the process. Cobalt and copper-based oxides have already stood out as heterogeneous activators characterized by high efficiency towards persulfate activation [12,13].…”

Section: Introductionmentioning

confidence: 99%

Lanthanum Nickel Oxide: An Effective Heterogeneous Activator of Sodium Persulfate for Antibiotics Elimination

et al. 2020

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In recent years, the presence of pharmaceutically active compounds (PhACs) in surface waters and wastewaters has b the effectiveness of conventional water treatment methods. Towards this direction, advanced oxidation processes (AOPs) for the complete elimination of micro pollutants in waters have become an emerging area of research. The present study reports the heterogeneous activation of sodium persulfate (SPS) by LaNiO3 (LNO) perovskite oxide for the degradation of sulfamethoxazole (SMX), an antibiotic agent. LNO was prepared according to a combustion method, and its physicochemical characteristics were identified by means of XRD, BET, TEM, and SEM/EDS. SMX degradation results showed the great efficiency of LNO for SPS activation. Increasing LNO and SPS dosage up to 250 mg/L enhanced the SMX degradation. In contrast, increasing SMX concentration resulted in longer time periods for its degradation. Considering the pH effect, SMX removal was obstructed under basic conditions, while the efficiency was enhanced at near-neutral conditions. The present system’s activity was also tested for piroxicam (PIR) and methylparaben (MeP) degradation, showing promising results. Unfortunately, experiments conducted in real water matrices such as bottled water (BW) and wastewater (WW), showed that SMX removal was limited to less than 25% in both cases. The hindering effects were mainly attributed to bicarbonate ions and organic matter present in aqueous media. The results obtained using suitable radical scavengers revealed the contribution of both hydroxyl and sulfate radicals in degradation reactions. Finally, LNO exhibited good stability under consecutive experimental runs.

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“…Two reasons could interpret this result. First, an optimal PMS could serve as electron acceptors, leading to the improvement of the photocatalytic performance, whereas the photogenerated electrons might not be readily sufficient to activate the excessive PMS [30]. Second, a typical reaction could be involved in the process that happens between excessive PMS and SO ⋅− 4 radicals to give rise to the generation of SO − 5 that has a lower oxidizing ability [42], leading to the decreased performance against RhB (see equation (2)).…”

Section: Resultsmentioning

confidence: 99%

“…By taking advantage of the ability for mass production of TNT with the abundant availability, chemical stability, and ease in the processing of cPVC, fabrication of cPVC/TNT nanocomposites could potentially be used broadly in practice. Moreover, the introduction of sulfate anion radicals into the reaction system, subsequently activated by the photocatalyst under light irradiation, results in a significant enhancement in the photocatalytic efficiency [8,[30][31][32][33][34][35]. Thus, the combination of a visible-light-driven photocatalyst with the strong oxidizing capability of SO ⋅− 4 radicals can potentially lead to the highest photocatalytic performance of that specific photocatalyst under visible light.…”

Section: Introductionmentioning

confidence: 99%

Peroxymonosulfate Activation on a Hybrid Material of Conjugated PVC and TiO2 Nanotubes for Enhancing Degradation of Rhodamine B under Visible Light

Tran

Huan

et al. 2020

Advances in Polymer Technology

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Visible-light-driven photocatalysis is a robust technology for amending the negative effect of pollutants on the environment with a minimum energy use. Herein, we describe a simple approach to producing such a photocatalyst by coupling conjugated polyvinyl chloride (cPVC) with the TiO2 nanotube (TNT) thermolysis method. By activating peroxymonosulfate (PMS) to make a cPVC/TNT/PMS system using visible light as the source, we obtain a significant enhancement in the photocatalytic performance. We show that PMS use at a concentration of 3 mM can fully degrade rhodamine B (RhB) solution at a remarkably high concentration (200 mg L-1) just in 120 min under visible light. The cPVC/TNT/PMS system also shows excellent stability in recycling tests for at least five times. Further, by confining the active species in photocatalytic reactions, we report a thorough understanding of the extent of involvement from those radicals. Our work presents a robust approach to make a high-performance, visible-light-driven photocatalyst, which can be potentially used in practice.

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Catalytic degradation of ciprofloxacin by a visible-light-assisted peroxymonosulfate activation system: Performance and mechanism

Cited by 333 publications

References 62 publications

Ternary MOF-on-MOF heterostructures with controllable architectural and compositional complexity via multiple selective assembly

Ternary MOF-on-MOF heterostructures with controllable architectural and compositional complexity via multiple selective assembly

Lanthanum Nickel Oxide: An Effective Heterogeneous Activator of Sodium Persulfate for Antibiotics Elimination

Peroxymonosulfate Activation on a Hybrid Material of Conjugated PVC and TiO2 Nanotubes for Enhancing Degradation of Rhodamine B under Visible Light

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