Graphene oxide-induced CuO reduction in TiO2/CaTiO3/Cu2O/Cu composites for photocatalytic degradation of drugs via peroxymonosulfate activation

Tanos, Fida; Makhoul, Elissa; Nada, Amr A.; Bekheet, Maged F.; Riedel, Wiebke; Kawrani, Sarah; Belaid, Habib; Petit, Eddy; Viter, Roman; Fedorenko, Victoriia; Ramanavicius, Arunas; Boulos, Madona; Cornu, David; Razzouk, Antonio; Lesage, Geoffroy; Cretin, Marc; Bechelany, Mikhael

doi:10.1016/j.apsusc.2024.159698

Cited by 14 publications

(1 citation statement)

References 102 publications

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“…The ZN1.5 nanofibers combined with PMS under visible light led to significant degradation (92%) of acetaminophen, attributed to the synergistic effects that enhance PMS activation. This is likely due to the generation of reactive sulfate (SO 4 − ) radicals facilitated by the photocatalytic action of the nanofibers, which involve the transfer of photogenerated electrons from the ZnO-NiO heterostructure to PMS [46]. Numerous photocatalysts have been developed and assessed for their effectiveness in degrading organic pollutants through photocatalysis.…”

Section: Photocatalytic Degradation Of Acetaminophen Using Zno-nio Hy...mentioning

confidence: 99%

Enhanced Photodegradation of Acetaminophen Using Efficient ZnO-NiO Nanofibers

Gomaa,

El-Maghrabi,

Gomaa

et al. 2024

Catalysts

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The increasing presence of pharmaceutical pollutants, such as acetaminophen, in water bodies poses a significant environmental challenge due to their persistence and potential toxicity. This study investigated the enhanced photodegradation of acetaminophen using ZnO-NiO nanofibers as superior photocatalysts. The nanofibers synthesized with varying NiO contents (designated as ZN0.5, ZN1, ZN1.5, and ZN2), were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman, FTIR, Brunauer–Emmett–Teller (BET) analysis, and diffuse reflectance spectroscopy (DRS) to elucidate their structural, morphological, and optical properties. Thermogravimetric analysis (TGA) indicated that the nanofibers exhibit high thermal stability, with major weight loss attributed to the decomposition of the polymer matrix and residual organics. The BET analysis revealed that the specific surface area remains stable after increasing the NiO content up to a certain ratio. This stability correlates with the enhanced photocatalytic performance due to increased light absorption and improved charge separation. The diffuse reflectance spectra and Kubelka–Munk plots demonstrated a reduction in bandgap energy with higher NiO content, facilitating greater visible light absorption. Photocatalytic experiments under visible light irradiation, in the presence of peroxymonosulfate (PMS), showed that the ZN1.5 nanofibers achieved the highest acetaminophen degradation rate, i.e., 92%, within 3 h. Mechanistic studies, supported by radical trapping experiments, revealed that the improved photocatalytic efficiency is due to the synergistic effects of ZnO and NiO heterojunctions, which enhance charge separation and reactive oxygen species (ROS) generation. This research highlights the potential of ZnO-NiO nanofibers as effective photocatalysts for the degradation of pharmaceutical pollutants. The findings demonstrate that optimizing the composition and structure of nanofibers can significantly improve their environmental remediation capabilities, providing a promising solution for sustainable water treatment.

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Section: Photocatalytic Degradation Of Acetaminophen Using Zno-nio Hy...mentioning

confidence: 99%

Enhanced Photodegradation of Acetaminophen Using Efficient ZnO-NiO Nanofibers

Gomaa,

El-Maghrabi,

Gomaa

et al. 2024

Catalysts

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Efficient Peroxymonosulfate Activation by Metallic Copper in TiO₂–CaTiO₃–Cu₂O–Cu Anodes for Electrocatalytic Degradation of Organic Pollutants

Tanos,

Makhoul,

Nada

et al. 2024

Adv Energy and Sustain Res

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The development of heterogeneous electrodes with high conductivity and electrocatalytic activity is a crucial goal. Achieving this using a simple and low‐cost method is essential for wastewater purification by anodic oxidation combined with peroxymonosulfate (PMS). Herein, TiO2–CaTiO3(CTO)‐Cu2O–Cu heterojunction electrodes are prepared by mixing CaCu3Ti4O12 with different amounts of graphene oxide (GO). The different mixtures are pressed into pellets and sintered under inert atmosphere at 1100 °C for 3 h. The obtained pellets are used as anodes for PMS activation in the electrocatalysis. The efficiency of paracetamol (PCM) removal reaches its maximum (93%) after 90 min using the CTO–Cu–5GO electrode in a solution containing 10 ppm PCM, 210 mL sodium sulfate, and 0.5 mM PMS. The higher amount of metallic copper in this anode promotes the generation of radicals to effectively degrade PCM. In optimal conditions (1.2 V versus Ag/AgCl, 1 mM PMS, and 10 ppm PCM), PCM is completely removed in 45 min. According to the quenching test results, •O2− and •OH are the radicals generated during PCM degradation, and •O2− plays the main role. In this work, insights are provided into the rational combination of different metal oxides with TiO2 as a heterostructure electrode to ensure high mineralization of pharmaceuticals by electrocatalysis.

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Fabrication of p–n Cu2O/CaWO4 heterojunctions for the efficient degradation of tetracycline and doxycycline

Yu,

Li,

Liu

et al. 2024

Applied Surface Science

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Graphene oxide-induced CuO reduction in TiO2/CaTiO3/Cu2O/Cu composites for photocatalytic degradation of drugs via peroxymonosulfate activation

Cited by 14 publications

References 102 publications

Enhanced Photodegradation of Acetaminophen Using Efficient ZnO-NiO Nanofibers

Enhanced Photodegradation of Acetaminophen Using Efficient ZnO-NiO Nanofibers

Efficient Peroxymonosulfate Activation by Metallic Copper in TiO₂–CaTiO₃–Cu₂O–Cu Anodes for Electrocatalytic Degradation of Organic Pollutants

Fabrication of p–n Cu2O/CaWO4 heterojunctions for the efficient degradation of tetracycline and doxycycline

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Graphene oxide-induced CuO reduction in TiO2/CaTiO3/Cu2O/Cu composites for photocatalytic degradation of drugs via peroxymonosulfate activation

Cited by 14 publications

References 102 publications

Enhanced Photodegradation of Acetaminophen Using Efficient ZnO-NiO Nanofibers

Enhanced Photodegradation of Acetaminophen Using Efficient ZnO-NiO Nanofibers

Efficient Peroxymonosulfate Activation by Metallic Copper in TiO2–CaTiO3–Cu2O–Cu Anodes for Electrocatalytic Degradation of Organic Pollutants

Fabrication of p–n Cu2O/CaWO4 heterojunctions for the efficient degradation of tetracycline and doxycycline

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Efficient Peroxymonosulfate Activation by Metallic Copper in TiO₂–CaTiO₃–Cu₂O–Cu Anodes for Electrocatalytic Degradation of Organic Pollutants