BiFeO3/Magnetic nanocomposites for the photocatalytic degradation of ceﬁxime from aqueous solutions under visible light

Mostafaloo, Roqiyeh; Mahmoudian, Mohammad Hassan; Asadi-Ghalhari, Mahdi

doi:10.1016/j.jphotochem.2019.111926

Cited by 37 publications

(12 citation statements)

References 38 publications

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“…Antibiotics are the major problem among these contaminants, as they are highly toxic and widely used for both pets and human medicines [2]. They increase environmental pollution due to their widespread use and toxic nature [3]. Moreover, the presence of these compounds in water supplies, even at low levels, strengthens bacterial resistance, consequently creating antibiotic resistance (ABR) [4].…”

Section: Introductionmentioning

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: Introductionmentioning

confidence: 99%

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

et al. 2021

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“…Analytical study of antibiotic use in 76 countries from 2010-2015 found that global antibiotic consumption has increased by 65% for the fifteen years studied (Sample 2018). The majority of antibiotic products are not biodegradable and their environmental contamination can increase aquatic toxicity (Mostafaloo et al 2019). Generally, antibiotics are present at amounts ranging from ng/L to μg/L in treated wastewater (Ibáñez et al 2017;Shokoohi et al 2017;Mirzaei et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Artificial neural network modeling of cefixime photodegradation by synthesized CoBi2O4 nanoparticles

Baaloudj

Nasrallah

Kebir

et al. 2020

Environ Sci Pollut Res

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CoBi2O4 (CBO) nanoparticles were synthesized by sol-gel method using Polyvinylpyrrolidone (PVP) as a complexing reagent. For a single-phase with the spinel structure, the formed gel was dried and calcined at four temperatures stages. Various methods were used to identified and characterized the obtained spinel, such as X-ray diffraction (XRD), Scanning Electron Micrograph (SEM-EDX), Transmission electron microscope (TEM), Fourier transform infrared (FT-IR), X-ray fluorescence (XRF), Raman and UV-Vis spectroscopies. The photocatalytic activity of CBO was examined for the degradation of a pharmaceutical product Cefixime (CFX). Furthermore, for the prediction of the CFX degradation rate an artificial neural network model was used.The network was trained using the experimental data obtained at different pH with different CBO doses and initial CFX concentrations. To optimize the network, various algorithms and transfer functions for the hidden layer were tested. By calculating the REVISED MANUSCRIPT mean square error (MSE), 13 neurons were found to be the optimal number of neurons and produced the highest coefficient of correlation R 2 of 99.6 %. The relative significance of the input variables was calculated and the most impacting input was proved to be the initial CFX concentration. The effects of some scavenging agents were also studied. The results confirmed the dominant role of hydroxyl radical OH • in the degradation process. With the novel CoBi2O4/ZnO hetero-system, the photocatalytic performance has been enhanced, giving an 80% degradation yield of CFX (10 mg/L) at neutral pH in only 3 hours.

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“…From Figs. 4c and 4d the adequacy can be predicted and the random scattering of the residuals around zero reveal that the model was well presented, and the constant variance assumption was appropriate [36]. Consequently, the plot of the Cook's distance is presented in Fig.…”

Section: Diagnostic Of the Responsesmentioning

confidence: 86%

Box–Behnken Design for Optimizing the Synthesis Condition and Adsorption Capability of Covalently Crosslinked Chitosan/coal Fly Ash Composite

Mohammed

Malek

Jawad

et al. 2021

Preprint

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The growing concern regarding the environmental protection has encouraged researchers to focus their efforts on developing better and more effective possibilities of removing pollutants. In this research, a biocomposite adsorbent of covalently crosslinked chitosan-epichlorohydrin/coal fly ash (CHT-ECH/CFA) was synthesized and applied for reactive red 120 dye (RR120) removal. The CHT-ECH/CFA was characterized by BET, pH potentiometric, pHpzc, XRD, FTIR and SEM-EDX. Box–Behnken Design (BBD) was employed to assess the effects of the adsorption key parameters such as CFA loading into CTH-ECH matrix, adsorbent dose, solution pH, working temperature and contact time. The optimized CFA loading, adsorbent dose, temperature, time, and pH were observed to be 50 %, 0.07 g, 45 °C, 60 min, and pH 4 respectively. From BBD, the highest removal of RR120 removal at optimum conditions was found to be 90.2%. The results showed that adsorption performance can be modelled perfectly by both Langmuir and Freundlich isotherm models with maximum adsorption capacity of 237.7 mg/g at 45 °C. Moreover, the adsorption kinetics were well fitted to the pseudo-second order model. Based on the findings from the experiments conducted, the hybrid biocomposite adsorbent offers adequate potential for the treatment of anionic dye-polluted water.

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BiFeO3/Magnetic nanocomposites for the photocatalytic degradation of ceﬁxime from aqueous solutions under visible light

Cited by 37 publications

References 38 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

Artificial neural network modeling of cefixime photodegradation by synthesized CoBi2O4 nanoparticles

Box–Behnken Design for Optimizing the Synthesis Condition and Adsorption Capability of Covalently Crosslinked Chitosan/coal Fly Ash Composite

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