A new hetero-junction p -CuO/ n -ZnO for the removal of amoxicillin by photocatalysis under solar irradiation

Yahia, Belaissa; Nibou, Djamel; Assadi, Aymen Amine; Bellal, B.; Trari, M.

doi:10.1016/j.jtice.2016.09.002

Cited by 70 publications

(13 citation statements)

References 36 publications

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“…This catalyst is a successful choice for the photodegradation of antibiotics as an electron reservoir [28]. In previous works [13,[63][64][65], both holes and hydroxyl radicals have been suggested to be active oxidizing agents responsible for removing organic substances. The photodegradation mechanism was illustrated in both Figure 10 and Equations ( 15) to ( 18…”

Section: Energy Diagram and Suggested Mechanismmentioning

confidence: 99%

Synthesis and Characterization of ZnBi2O4 Nanoparticles: Photocatalytic Performance for Antibiotic Removal under Different Light Sources

et al. 2021

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This work aims to synthesize a photocatalyst with high photocatalytic performances and explore the possibility of using it for antibiotic removal from wastewater. For that, the spinel ZnBi2O4 (ZBO) was produced with the co-precipitation method and its optical, dielectric, and electrochemical characteristics were studied. The phase has been determined and characterized by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). For the ZBO morphology, a Scanning Electron Microscopy (SEM) has been used. Then, the optical and dielectric properties of ZBO have been evaluated by calculating refractive index n (λ), extinction coefficient (k), dissipation factor (tan δ), relaxation time (τ), and optical conductivity (σopt) using the spectral distribution of T(λ) and R(λ). An optical gap band of 2.8 eV was determined and confirmed. The electrochemical performance of ZBO was investigated and an n-type semiconductor with a flat band potential of 0.54 V_SCE was found. The photocatalytic efficiency of ZBO was investigated in order to degrade the antibiotic Cefixime (CFX) under different light source irradiations to exploit the optical properties. A high CFX degradation of approximately 89% was obtained under solar light (98 mW cm−2) only after 30 min, while 88% of CFX degradation efficiency has been reached after 2 h under UV irradiation (20 mW cm−2); this is in line with the finding of the optical characterizations. According to the obtained data, solar light assisted nanoparticle ZBO can be used successfully in wastewater to remove pharmaceutical products.

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Section: Energy Diagram and Suggested Mechanismmentioning

confidence: 99%

Synthesis and Characterization of ZnBi2O4 Nanoparticles: Photocatalytic Performance for Antibiotic Removal under Different Light Sources

et al. 2021

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“…Photocatalysis is known as AOP, which applied in both air and water purification, mainly in the case of persistent pollutants [24]. This process implies the excitation of electrons of valence band to move into the conduction band, leaving behind a positive hole (h + ).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Photocatalytic degradation of binary and ternary mixtures of antibiotics: reactive species investigation in pilot scale

Zeghioud

Kamagaté

Coulibaly³

et al. 2019

Chemical Engineering Research and Design

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“…The reduction in the number of active sites on the WO 3 surface is the result of three main mechanisms. First, when the C 0 increases, the AMO molecules absorb more light, reducing the number of photons that reach the catalyst surface 32,52,53 . Second, the absorption of AMO molecules onto the catalyst surface increases with C 0 , thereby reducing the number of available active sites on the catalyst surface.…”

Section: Resultsmentioning

confidence: 99%

Tungsten Trioxide (WO3)-assisted Photocatalytic Degradation of Amoxicillin by Simulated Solar Irradiation

Nguyen

Nam

Son

et al. 2019

Sci Rep

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This study investigates the photocatalytic degradation of amoxicillin (AMO) by simulated solar irradiation using WO 3 as a catalyst. A three-factor-three-level Box-Behnken design (BBD) consisting of 30 experimental runs is employed with three independent variables: initial AMO concentration, catalyst dosage, and pH. The experimental results are analyzed in terms of AMO degradation and mineralization, the latter of which is measured using dissolved organic carbon (DOC). The results show that the photocatalytic degradation of AMO follows pseudo-first-order kinetics. AMO degradation efficiency and the pseudo-first-order rate constants decrease with increasing initial AMO concentration and pH and increase with increasing catalyst dosage. Though AMO degradation is almost fully complete under the experimental conditions, DOC removal is much lower; the highest DOC removal rate is 35.82% after 180 min. Using these experimental results, second-order polynomial response surface models for AMO and DOC removal are constructed. In the AMO removal model, the first-order terms are the most significant contributors to the prediction, followed by the quadratic and interaction terms. Initial AMO concentration and pH have a significant negative impact on the photocatalytic degradation of AMO, while catalyst dosage has a significant positive impact. In contrast, in the DOC removal model, the quadratic terms make the most significant contribution to the prediction and the first-order terms the least. The optimal conditions for the photocatalytic degradation of AMO are found to be an initial AMO concentration of 1.0 μM, a catalyst dosage of 0.104 g/L, and a pH of 4, under which almost complete removal of AMO is achieved (99.99%).

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A new hetero-junction p -CuO/ n -ZnO for the removal of amoxicillin by photocatalysis under solar irradiation

Cited by 70 publications

References 36 publications

Synthesis and Characterization of ZnBi2O4 Nanoparticles: Photocatalytic Performance for Antibiotic Removal under Different Light Sources

Synthesis and Characterization of ZnBi2O4 Nanoparticles: Photocatalytic Performance for Antibiotic Removal under Different Light Sources

Photocatalytic degradation of binary and ternary mixtures of antibiotics: reactive species investigation in pilot scale

Tungsten Trioxide (WO3)-assisted Photocatalytic Degradation of Amoxicillin by Simulated Solar Irradiation

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