Synthesis of CQDs@FeOOH nanoneedles with abundant active edges for efficient electro-catalytic degradation of levofloxacin: Degradation mechanism and toxicity assessment

Meng, Fanqing; Wang, Yingling; Жен, Чен; Hu, Jin‐Lin; Lü, Guang; Ma, Wei

doi:10.1016/j.apcatb.2020.119597

Cited by 66 publications

(18 citation statements)

References 51 publications

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“…† It was reported that the Environmental Science: Nano Paper main degradation pathways of LEV involve quinolone ring destruction, piperazine ring removal, defluorination and ringopening processes. [50][51][52][53] Herein, according to the detected intermediates and previous reports, 48,51,[54][55][56][57][58] small molecules that cannot be completely degraded.…”

Section: Synergistic Removal Of Lev and Crĳvi)mentioning

confidence: 76%

“…It was reported that the main degradation pathways of LEV involve quinolone ring destruction, piperazine ring removal, defluorination and ring-opening processes. 50–53 Herein, according to the detected intermediates and previous reports, 48,51,54–58 three possible degradation routes were proposed and are presented in Scheme 2. Route I mainly involves the oxidation and destruction of the piperazine ring.…”

Section: Resultsmentioning

confidence: 95%

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Nitrogen-rich porous polymeric carbon nitride with enhanced photocatalytic activity for synergistic removal of organic and heavy metal pollutants

et al. 2022

Environ. Sci.: Nano

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Section: Synergistic Removal Of Lev and Crĳvi)mentioning

confidence: 76%

Section: Resultsmentioning

confidence: 95%

Nitrogen-rich porous polymeric carbon nitride with enhanced photocatalytic activity for synergistic removal of organic and heavy metal pollutants

et al. 2022

Environ. Sci.: Nano

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“…Subsequently, the opening of benzene rings lead to the production of L16 (m/z = 80) and L17 (m/z = 54). Finally, intermediate L17 products might be continuously broken into small-molecule organic acids and mineralization products [49][50][51][52][53][54][55][56].…”

Section: Possible Degradation Routes Of Lvxmentioning

confidence: 99%

Electrocatalytic Degradation of Levofloxacin, a Typical Antibiotic in Hospital Wastewater

Han

et al. 2021

Materials

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Presently, in the context of the novel coronavirus pneumonia epidemic, several antibiotics are overused in hospitals, causing heavy pressure on the hospital’s wastewater treatment process. Therefore, developing stable, safe, and efficient hospital wastewater treatment equipment is crucial. Herein, a bench-scale electrooxidation equipment for hospital wastewater was used to evaluate the removal effect of the main antibiotic levofloxacin (LVX) in hospital wastewater using response surface methodology (RSM). During the degradation process, the influence of the following five factors on total organic carbon (TOC) removal was discussed and the best reaction condition was obtained: current density, initial pH, flow rate, chloride ion concentration, and reaction time of 39.6 A/m2, 6.5, 50 mL/min, 4‰, and 120 min, respectively. The TOC removal could reach 41% after a reaction time of 120 min, which was consistent with the result predicted by the response surface (40.48%). Moreover, the morphology and properties of the electrode were analyzed. The degradation pathway of LVX was analyzed using high-performance liquid chromatography–mass spectrometry (LC–MS). Subsequently, the bench-scale electrooxidation equipment was changed into onboard-scale electrooxidation equipment, and the onboard-scale equipment was promoted to several hospitals in Dalian.

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“…Hydrogen peroxide (H 2 O 2 ), persulfates, and ozone (O 3 ) are the most common commercial oxidants used in AOPs. − In particular, peroxymonosulfate (PMS) can be easily activated by both homogeneous and heterogeneous catalytic systems. − Compared with • OH (1.8–2.7 V), SO 4 •– possesses a high redox potential (2.5–3.1 V), high selectivity, and relatively longer half-life (30–40 μs). , Transition metal ions and metal oxides (Co, Mn, Fe, Cu, etc.) have been widely used to activate PMS and to produce a hydroxyl radical ( • OH) and sulfate radical (SO 4 •– ). − The rapid redox circulation of multi-valence metal sites is the key to promoting the utilization efficiency of PMS and peroxydisulfate (PDS). − Single metal atoms anchored on N rich sites are electropositive sites to adsorb and activate persulfates. , In addition, the morphology, oxidation states, and crystallographic phases of the MnO x are controlled to analyze the structure–performance relationships. Nevertheless, metal-based catalysts are highly effective, but the potential secondary pollution and post-treatment limit their practical application …”

Section: Introductionmentioning

confidence: 99%

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

Wang

Duan

et al. 2021

ACS Catal.

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Nitrogen and sulfur co-doped graphene (N,S-G) is activated using ZnCl2, KOH, and CO2 to develop different defects and functionalities. The modified carbo-catalysts are used to activate peroxymonosulfate (PMS) for phenol degradation. Compared with nitrogen-doped graphene (N-G), N,S-G exhibits better catalytic activity, and KOH activation further enhances the oxidation efficiency. Radical quenching experiments, electrochemical characterization, and electron paramagnetic resonance characterization reveal that N-G activates PMS via a nonradical pathway. The involvement of a secondary sulfur dopant will transform the reaction pathway into radical-dominated oxidation (SO4 •–and •OH). KOH activation further promotes the generation of the two radical species and further involves superoxide ion radicals (O2 •–), thus achieving deeper mineralization of the organic pollutants. Different from the nonradical species confined on the catalyst surface, radical oxidation (including the singlet oxygen (1O2) transformed from O2 •–) occurs in bulk solution and protects the carbo-catalyst from corrosion, herein securing better structural integrity and stability of carbo-catalysts. Based on the structure–activity features, we designed a high-performance scalable carbo-catalyst of KOH-activated and N,S-codoped graphene (N,S-G-rGO-KOH) using a facile strategy, which is promising for practical applications.

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Synthesis of CQDs@FeOOH nanoneedles with abundant active edges for efficient electro-catalytic degradation of levofloxacin: Degradation mechanism and toxicity assessment

Cited by 66 publications

References 51 publications

Nitrogen-rich porous polymeric carbon nitride with enhanced photocatalytic activity for synergistic removal of organic and heavy metal pollutants

Nitrogen-rich porous polymeric carbon nitride with enhanced photocatalytic activity for synergistic removal of organic and heavy metal pollutants

Electrocatalytic Degradation of Levofloxacin, a Typical Antibiotic in Hospital Wastewater

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

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