Insight into photocatalytic degradation of ciprofloxacin over CeO2/ZnO nanocomposites: Unravelling the synergy between the metal oxides and analysis of reaction pathways

Wolski, Łukasz; Grzelak, Kalina; Muńko, Malwina; Frankowski, Marcin; Grzyb, Tomasz; Nowaczyk, Grzegorz

doi:10.1016/j.apsusc.2021.150338

Cited by 68 publications

(23 citation statements)

References 53 publications

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“…Such a transfer of charge carriers would lead to accumulation of photogenerated holes in CuS and photo-excited electrons in ZnO. In view of this observation, one can conclude that, the ZnO NRs and CuS QDs exhibit suitable band potentials, consequently, the two semiconductors can form heterojunction to enhance the electron transfer and reduce the photoinduced electron–hole recombination as confirmed from PL results 35 , 62 .…”

Section: Resultsmentioning

confidence: 55%

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Copper sulfide and zinc oxide hybrid nanocomposite for wastewater decontamination of pharmaceuticals and pesticides

Mohammed

Ali

Gomaa

et al. 2022

Sci Rep

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In this work, hybrid nanocomposites of CuS QDs @ ZnO photocatalysts are fabricated through a facile microwave-assisted (MW) hydrothermal method as a green preparation process. The prepared photocatalysts (PCs) are employed under simulated sunlight (SL) for the degradation of ciprofloxacin, ceftriaxone, ibuprofen pharmaceuticals, methylene blue dye, and 2,4,5-trichlorophenoxyacetic acid (2,4-D) pesticide. The prepared photocatalysts are characterized in detail using several compositional, optical, and morphological techniques. The influence of the CuS (QDs) wt. % on morphological, structural, as well as photocatalytic degradation efficiency have been investigated. The small displacement between the (107) plane of CuS and the (102) plane of ZnO can confirmed the existence of lattice interaction, implying the formation of p-n heterojunctions. TEM and XRD results demonstrated that the CuS QDs are established and uniformly decorated on the surface of ZnO NRs, confirming the forming of an efficient CuS QDs @ ZnO heterojunction nanostructures. The CuS QDs @ ZnO hybrid nanocomposites showed enhancement in crystallinity, light absorption, surface area, separation of e–h pair and inhibition in their recombination at an interfacial heterojunction. In addition it is found that, 3 wt% CuS QDs @ ZnO has the foremost influence. The results showed improvement of photocatalytic activity of the 3% CuS QDs @ ZnO hybrid nanocomposite as compared to the bare ZnO nanorods. The impressive photocatalytic performance of CuS @ ZnO heterostructure nanorods may be attributed to efficient charge transfer. The prepared CuS QDs @ ZnO hybrid nanocomposites exhibited 100% removal for MB dye, after 45 min, and after 60 min for ibuprofen, ciprofloxacin pharmaceuticals, and 2.4.5 trichloro phenoxy acetic acid pesticide with the catalyst amount of 0.2 g/L. Although 100% removal of ceftriaxone pharmaceutical acheived after 90 min. In addition CuS QDs @ ZnO hybrid nanocomposites exhibited complete removal of COD for ibuprofen, ceftriaxone pharmaceuticals and 2.4.5 trichloro phenoxy acetic acid pesticide after 2 h with no selectivity. Briefly, 3% CuS QDs@ZnO hybrid nanocomposites can be considered as promising photoactive materials under simulated sunlight for wastewater decontamination.

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Section: Resultsmentioning

confidence: 55%

“…Wolski demonstrated the degradation of ciprofloxacin (CIP) over CeO 2 /ZnO nanocomposites which synthesis by a simple co-precipitation method and reached to 60% degradation after 60 min 35 . Altynbaeva et al revealed the use of Cu 2 O/ZnO @ PET composite membrane for the degradation of carbendazim pesticide 36 .…”

Section: Introductionmentioning

confidence: 99%

Copper sulfide and zinc oxide hybrid nanocomposite for wastewater decontamination of pharmaceuticals and pesticides

Mohammed

Ali

Gomaa

et al. 2022

Sci Rep

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“…The CB of CeO 2 is higher than that of ZnO, The photogenerated electrons from CeO 2 is transferred to the CB of ZnO due to potential difference between them which in turn enhances the charge transfer mechanism, there by promoting the photocatalytic activity. [ 49 ] The heterojunction formed separates the photogenerated holes and electrons and prevents them from recombining. [ 50 ] The electron from the CB reacts with the surface adsorbed oxygen to form superoxide radicals and the hole in the VB reacts with the water molecules to form hydroxyl radical.…”

Section: Resultsmentioning

confidence: 99%

Enhanced photocatalytic activity of ceria‐doped zinc oxide under UV illumination prepared via chemical precipitation

et al. 2022

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Transition metal oxide has emerged as one of the most potential candidates for environment remediation by utilizing solar energy through photocatalysis. This study compares the optical characteristics of zinc oxide (ZnO) and ceria‐doped zinc oxide (CeZnO) nanoparticles synthesized through a facile chemical precipitation method without using any assistant catalyst. The present work investigates the consequences of ceria (cerium dioxide, CeO2) intrusion on the photocatalytic activity of ZnO nanoparticles using methylene blue (MB) as a probe pollutant. The CeZnO showed an increase in photoactivity when compared to ZnO nanoparticles for degradation of MB in an aqueous solution under ultraviolet (UV) irradiance. The resulting heterojunction between ZnO and that of ceria enhances the charge separation efficiency showing a strong correlation between ZnO and CeO2 heterojunction on the charge transfer mechanism across the interface.

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“…The presence of ciprofloxacin in water acts as pollutant and can be removed by means of a photocatalytic approach. 425–524…”

Section: Removal Of Pharmaceutical Components Using Different Photoca...mentioning

confidence: 99%

Recent advances in removal of pharmaceutical pollutants in wastewater using metal oxides and carbonaceous materials as photocatalysts: a review

Srivastava

2024

RSC Appl. Interfaces

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Insight into photocatalytic degradation of ciprofloxacin over CeO2/ZnO nanocomposites: Unravelling the synergy between the metal oxides and analysis of reaction pathways

Cited by 68 publications

References 53 publications

Copper sulfide and zinc oxide hybrid nanocomposite for wastewater decontamination of pharmaceuticals and pesticides

Copper sulfide and zinc oxide hybrid nanocomposite for wastewater decontamination of pharmaceuticals and pesticides

Enhanced photocatalytic activity of ceria‐doped zinc oxide under UV illumination prepared via chemical precipitation

Recent advances in removal of pharmaceutical pollutants in wastewater using metal oxides and carbonaceous materials as photocatalysts: a review

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