Indirect Z-scheme nitrogen-doped carbon dot decorated Bi2MoO6/g-C3N4 photocatalyst for enhanced visible-light-driven degradation of ciprofloxacin

Dang, Van Dien; Adorna, Joemer; Thamilselvan, Annadurai; Bui, Thi Ai Ngoc; Tran, Hai Linh; Lin, Liang-Yi; Doong, Ruey‐an

doi:10.1016/j.cej.2021.130103

Cited by 109 publications

(26 citation statements)

References 66 publications

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“…These results suggest the presence of the original functional groups of GQDs [ 27 , 35 ]. Similarly, the deconvoluted O 1s spectrum shows the Er–O bonds at 531.8 and 530.9 eV ( Figure 3 d), which were assigned as the linkage between the Er and O elements in the Er-GQD/HPB [ 36 ]. In addition, the other two peaks, at 533.6 and 532.7 eV, are the carboxylic C=O and O−H groups, respectively.…”

Section: Resultsmentioning

confidence: 99%

Erbium-Doped GQD-Embedded Coffee-Ground-Derived Porous Biochar for Highly Efficient Asymmetric Supercapacitor

et al. 2022

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A nanocomposite with erbium-doped graphene quantum dots embedded in highly porous coffee-ground-derived biochar (Er-GQD/HPB) was synthesized as a promising electrode material for a highly efficient supercapacitor. The HPB showed high porosity, with a large surface area of 1295 m2 g−1 and an average pore size of 2.8 nm. The 2–8-nanometer Er-GQD nanoparticles were uniformly decorated on the HPB, subsequently increasing its specific surface area and thermal stability. Furthermore, the intimate contact between the Er-GQDs and HPB significantly reduced the charge-transfer resistance and diffusion path, leading to the rapid migration of ions/electrons in the mesoporous channels of the HPB. By adding Er-GQDs, the specific capacitance was dramatically increased from 337 F g−1 for the pure HPB to 699 F g−1 for the Er-GQD/HPB at 1 A g−1. The Ragone plot of the Er-GQD/HPB exhibited an ultrahigh energy density of 94.5 Wh kg−1 and a power density of 1.3 kW kg−1 at 1 A g−1. Furthermore, the Er-GQD/HPB electrode displayed excellent cycling stability, and 81% of the initial capacitance remained after 5000 cycles. Our results provide further insights into a promising supercapacitance material that offers the benefits of both fast ion transport from highly porous carbons and electrocatalytic improvement due to the embedment of Er-doped GQDs to enhance energy density relative to conventional materials.

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Section: Resultsmentioning

confidence: 99%

Erbium-Doped GQD-Embedded Coffee-Ground-Derived Porous Biochar for Highly Efficient Asymmetric Supercapacitor

et al. 2022

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“…Z-scheme degradation of levofloxacin has also been reported with an efficiency of 90.8% in 70 minutes of irradiation on Sm 6 WO 12 /g-C 3 N 4 nanocomposite through • O 2 − and • OH as the main ROSs [74] . Moreover, ciprofloxacin degradation was accomplished with an indirect Z-scheme Bi 2 MoO 6 /g-C 3 N 4 with nitrogen doped carbon dots as the electron mediator [75] . The Z-scheme mechanism was proved with ESR and radical trapping experiments while the effect of solution pH, initial concentration of CIP, catalyst dosage, and inorganic anions and organic matters were studied.…”

Section: Z-scheme Photocatalysismentioning

confidence: 99%

Modulation of Z-scheme photocatalysts for pharmaceuticals remediation and pathogen inactivation: Design devotion, concept examination, and developments

Malefane

Mafa

Nkambule

et al. 2023

Chemical Engineering Journal

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“…Pharmaceutical wastes are among the emerging environmental contaminants that pose health risks to humans due to their toxicity and recalcitrant nature to treatment especially by traditional water treatment methods. Thus, quests for successful mitigation processes to achieve the complete remediation of this emerging class of pollutants from the environment and water have resorted to AOPs of which EF is a subset. − EF has recently been applied in the removal of various pharmaceuticals and bacteria in effluent water in Colombia by Martínez and co-authors . More similar work in the degradation of pharmaceuticals in wastewater was reported by Emeji and colleagues in the removal of antiretroviral drugs, while Wang and co-authors used EF in separate work for the removal of ciprofloxacin and an antibiotic (cefoperazone), respectively. , …”

Section: Introductionmentioning

confidence: 99%

Improved Magnetite Nanoparticle Immobilization on a Carbon Felt Cathode in the Heterogeneous Electro-Fenton Degradation of Aspirin in Wastewater

Muzenda

Arotiba

2022

ACS Omega

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Toward the improvement of the application of heterogeneous electro-Fenton in water treatment, we report a new strategy of enhancing the immobilization of a magnetite nanoparticle catalyst on a carbon felt cathode. Exploiting the intrinsic ferrimagnetic properties of magnetite nanoparticles, magnet bars were used to attach the magnetite into the void spaces of the porous carbon felt (CF) cathode. The magnetite nanoparticles were prepared by coprecipitation with variations in the molar ratios of Fe 2+ /Fe 3+ . The magnetite was characterized, attached onto the CF electrode with magnetic bars, and used in the heterogeneous electro-Fenton (EF) degradation of aspirin. The effects of the following on the degradation were studied: Fe 2+ /Fe 3+ , pH, catalyst loading concentration, and voltage. The heterogeneous EF degradation of aspirin in wastewater improved by 23% when magnetic bars were used to enhance the immobilization of the magnetite catalysts. The 1:4 Fe 2+ /Fe 3+ ratio resulted in the highest hetero-EF catalytic degradation of aspirin with complete degradation (100%) achieved after 140 min. For a mixture of pharmaceuticals, degradation percentages of 94.3% (aspirin), 88% (ciprofloxacin), and 80% (paracetamol) in 3 h were obtained. The magnetized magnetite on the cathode was reusable for 10 cycles. Thus, the use of magnets shows a promising strategy to avoid the leaching of ferrimagnetic nanoparticle catalysts embedded in the cathode for heterogeneous EF processes.

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Indirect Z-scheme nitrogen-doped carbon dot decorated Bi2MoO6/g-C3N4 photocatalyst for enhanced visible-light-driven degradation of ciprofloxacin

Cited by 109 publications

References 66 publications

Erbium-Doped GQD-Embedded Coffee-Ground-Derived Porous Biochar for Highly Efficient Asymmetric Supercapacitor

Erbium-Doped GQD-Embedded Coffee-Ground-Derived Porous Biochar for Highly Efficient Asymmetric Supercapacitor

Modulation of Z-scheme photocatalysts for pharmaceuticals remediation and pathogen inactivation: Design devotion, concept examination, and developments

Improved Magnetite Nanoparticle Immobilization on a Carbon Felt Cathode in the Heterogeneous Electro-Fenton Degradation of Aspirin in Wastewater

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