Photocatalytic decomposition of metronidazole by zinc hexaferrite coated with bismuth oxyiodide magnetic nanocomposite: Advanced modelling and optimization with artificial neural network

Moslehi, Mohammad Hadi; Eslami, Mostafa; Ghadirian, Morteza; Nateq, Kasra; Ramavandi, Bahman; Nasseh, Negin

doi:10.1016/j.chemosphere.2024.141770

Cited by 19 publications

(3 citation statements)

References 47 publications

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“…This could be illustrated as by increasing the dose, sufficient surface area became available to serve the adsorption process, besides more radicals and positive holes will be generated which in turn serve the degradation rate 34 , 35 . The composite had a higher degradation efficiency than Ag 3 PO 4 , which was in line with BET analysis expectations because the composite had a higher specific surface area than Ag 3 PO 4 ; thanks to the incorporated graphene/SiO 2 composite which increased the adsorption area and improved the photocatalytic activity by trapping the excited electrons in the conduction band, therefore, minimizing their recombination with the valence band’s holes, which had a positive impact on the percent of degradation 36 , 37 . It is demonstrated from the graph that Ag 3 PO 4 and Ag 3 PO 4 /G/SiO 2 have a significant percentage of degradation at dose 0.03 g, with 89% and 98.5%, respectively.…”

Section: Resultssupporting

confidence: 79%

“…This can be explained via the high conductivity of graphene which could act as an electron acceptor which in role enhance the rate of formation of positive holes on the composite surface and ensure the continuity of the photocatalytic performance 25 , 33 , 36 . Tauc equation 25 , 36 has been used to determine the band gap energy of Ag 3 PO 4 and Ag 3 PO 4 /G/SiO 2 sample, according to the following formula. where E g , α, h, , and A, are band gap energy, absorption coefficient, Planck constant, photon frequency, constant, respectively.…”

Section: Resultsmentioning

confidence: 99%

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Formulation of silver phosphate/graphene/silica nanocomposite for enhancing the photocatalytic degradation of trypan blue dye in aqueous solution

Showman,

Omara,

El-Ashtoukhy

et al. 2024

Sci Rep

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Photocatalytic degradation of several harmful organic compounds has been presented as a potential approach to detoxify water in recent decades. Trypan Blue (TB) is an acidic azo dye used to distinguish live cells from dead ones and it's classified as a carcinogenic dye. In this study, silver phosphate (Ag3PO4) nanoparticles and novel Ag3PO4/graphene/SiO2 nanocomposite have been successfully prepared via simple precipitation method. Afterward, their physical properties, chemical composition, and morphology have been characterized using SEM, EDS, TEM, SAED, BET, XRD, FTIR and UV–VIS spectroscopy. The specific surface area of Ag3PO4 and Ag3PO4/G/SiO2 nanocomposite were reported to be 1.53 and 84.97 m2/g, respectively. The band gap energy of Ag3PO4 and Ag3PO4/G/SiO2 nanocomposite was measured to be 2.4 and 2.307 eV, respectively. Photocatalytic degradation of Trypan blue (TB) was studied at different parameters such as pH, catalyst dosage, initial concentration, and contact time. The results showed that, at initial dye concentration of 20 ppm, pH = 2, and using 0.03 g of Ag3PO4/G/SiO2 as a photocatalyst, the degradation percent of TB dye in the aqueous solution was 98.7% within 10 min of light exposure. Several adsorption isotherms such as Langmuir, Freundlich, and Temkin adsorption isotherms have been tested in addition to the photocatalytic degradation kinetics. Both catalysts were found to follow the Langmuir isotherm model and pseudo-second-order kinetic model. Finally, the possible photocatalytic performance mechanism of Ag3PO4/G/SiO2 was proposed.

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Section: Resultssupporting

confidence: 79%

Section: Resultsmentioning

confidence: 99%

Formulation of silver phosphate/graphene/silica nanocomposite for enhancing the photocatalytic degradation of trypan blue dye in aqueous solution

Showman,

Omara,

El-Ashtoukhy

et al. 2024

Sci Rep

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show abstract

“…12 -a). However, the mineralization rate was less than the removal efficiency of AMX at the optimal reaction time, potentially attributed to the formation of intermediate compound 63 , 64 . However, as the irradiation time increased, there was a relative improvement in the degree of mineralization, indicating a positive impact of the photocatalytic decomposition process.…”

Section: Resultsmentioning

confidence: 97%

Novel nanostructure approach for antibiotic decomposition in a spinning disc photocatalytic reactor

Fallahizadeh,

Rahimi,

Gholami

et al. 2024

Sci Rep

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Conventional wastewater treatment processes are often unable to remove antibiotics with resistant compounds and low biological degradation. The need for advanced and sustainable technologies to remove antibiotics from water sources seems essential. In this regard, the effectiveness of a spinning disc photocatalytic reactor (SDPR) equipped with a visible light-activated Fe3O4@SiO2-NH2@CuO/ZnO core–shell (FSNCZ CS) thin film photocatalyst was investigated for the decomposition of amoxicillin (AMX), a representative antibiotic. Various characterization techniques, such as TEM, FESEM, EDX, AFM, XRD, and UV–Vis-DRS, were employed to study the surface morphology, optoelectronic properties, and nanostructure of the FSNCZ CS. Key operating parameters such as irradiation time, pH, initial AMX concentration, rotational speed, and solution flow rate were fine-tuned for optimization. The results indicated that the highest AMX decomposition (98.7%) was attained under optimal conditions of 60 min of irradiation time, a rotational speed of 350 rpm, a solution flow rate of 0.9 L/min, pH of 5, and an initial AMX concentration of 20 mg/L. Moreover, during the 60 min irradiation time, more than 69.95% of chemical oxygen demand and 61.2% of total organic carbon were removed. After the photocatalytic decomposition of AMX, there is a substantial increase in the average oxidation state and carbon oxidation state in SDPR from 1.33 to 1.94 and 3.2, respectively. Active species tests confirmed that ·OH and ·O2− played a dominant role in AMX decomposition. The developed SDPR, which incorporates a reusable and robust FSNCZ CS photocatalyst, demonstrates promising potential for the decomposition of organic compounds.

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Synthesis, characterization, and adsorption study of Congo Red on melamine-formaldehyde nanocomposite microspheres

Bagheri,

Mohammadi,

Azhar

2024

Colloid Polym Sci

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Photocatalytic decomposition of metronidazole by zinc hexaferrite coated with bismuth oxyiodide magnetic nanocomposite: Advanced modelling and optimization with artificial neural network

Cited by 19 publications

References 47 publications

Formulation of silver phosphate/graphene/silica nanocomposite for enhancing the photocatalytic degradation of trypan blue dye in aqueous solution

Formulation of silver phosphate/graphene/silica nanocomposite for enhancing the photocatalytic degradation of trypan blue dye in aqueous solution

Novel nanostructure approach for antibiotic decomposition in a spinning disc photocatalytic reactor

Synthesis, characterization, and adsorption study of Congo Red on melamine-formaldehyde nanocomposite microspheres

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