Novel Ag-ZnO-La2O2CO3 photocatalysts derived from the Layered Double Hydroxide structure with excellent photocatalytic performance for the degradation of pharmaceutical compounds

Elhalil, A.; Elmoubarki, R.; Farnane, M.; Machrouhi, A.; Mahjoubi, F.Z.; Sadiq, M.; Qourzal, Samir; Abdennouri, Mohamed; Barka, Noureddine

doi:10.1016/j.jsamd.2019.01.002

Cited by 20 publications

(13 citation statements)

References 53 publications

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“…Moreover, an inhibition of radiation penetration into the solution, due to the light scattering phenomenon resulting a low degradation efficiency. Similarly, Elhalil et al ( 2019 ) demonstrated that the degradation of caffeine was declined by increasing Ag-ZnO-La 2 O 2 CO 3 photocatalysts amount. Consequently, the optimum catalyst dose of 50 mg/L was chosen in furthers experiments.…”

Section: Resultsmentioning

confidence: 86%

ZnO-Zn2TiO4 heterostructure for highly efficient photocatalytic degradation of pharmaceuticals

Janani

Khiar

Taoufik

et al. 2022

Environ Sci Pollut Res

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In this study, ZnO-Zn 2 TiO 4 (ZTM) material was prepared through a novel synthesis method based on a ultrasound-assisted polyol-mediated process followed by calcination at a different temperature. Physical features of the samples were studied by using various analysis techniques including XRD, FT-IR, SEM/EDX, pH PZC , and UV–Vis DRS. Subsequently, the materials were employed as catalysts for the photocatalytic degradation of clofibric acid as a model pharmaceutical contaminant. The photocatalytic performance was evaluated under different conditions of calcination temperature, catalyst dosage, starting concentration, and initial pH of clofibric acid solution. The finding results revealed that hexagonal-tetragonal phases of ZnO-Zn 2 TiO 4 calcined at 600 °C (ZTM-600) with an average crystallite size of 97.8 Å exhibited the best degradation efficiency (99%). The primary bands characteristic of ZnO and Zn 2 TiO 4 were displayed by FT-IR analysis and the UV–visible DRS confirms the larger absorption capacity in UV–visible regions. The photogenerated electrons are the powerful reactive species involved in clofibric acid photodegradation process. This study shows a promising photocatalyst and provides new sight to rational design the facets of photocatalysis process for enhanced photocatalytic performances and effective wastewater treatment.

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Section: Resultsmentioning

confidence: 86%

ZnO-Zn2TiO4 heterostructure for highly efficient photocatalytic degradation of pharmaceuticals

Janani

Khiar

Taoufik

et al. 2022

Environ Sci Pollut Res

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“…Elhalil and coauthors [38] studied ZnO-La2O2CO3 nanomaterials as catalysts and found that catalysts when doped with Ag showed better experimental results compared to pure ZnO and P-25, the best result was obtained with 5% Ag with degradation 99.4% after 40 minutes of reaction.…”

Section: Experimental Tests Of Photocatalysismentioning

confidence: 99%

Degradation of Caffeine by Heterogeneous Photocatalysis Using ZnO with Fe and Ag

Almeida

Pietrobelli

Lenzi

et al. 2020

Braz. arch. biol. technol.

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The organic compound caffeine when detected in environmental matrices such as surface waters and groundwater is considered as an emerging contaminant, in which its effects are still unknown. Therefore, in the present research, zinc oxide-based catalysts impregnated with iron and silver were prepared for the reaction of caffeine degradation by heterogeneous photocatalysis. The wet impregnation method with excess solvent was applied to the preparation of the materials, later they were characterized by adsorption of N2, Xray diffraction and photoacoustic spectroscopy. Then, the photodegradation, photolysis and adsorption tests were carried out, in which it was observed that only the presence of the radiation or photocatalysts could not sufficiently degrade the caffeine, however when combined radiation with all the catalysts studied here presented degradation above 70% at the end of 300 minutes of the reaction, and the best catalyst studied was that containing 8% Ag in non-calcined ZnO. Thus, these results point out that the methodology employed in this research, both for the preparation of the catalysts and in the process of the photocatalysis reaction, was efficient in the degradation of the emerging contaminant, caffeine, which could later be used for a mixture of other contaminants.

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“…The same authors (Elhalil et al, 2019) have used as photocatalysts composites Ag-ZnO-La2O2CO3 derived from hydrotalcites. The hydrotalcites were formed by the coprecipitation method, considering the ratios Zn/(Al+La) of 3 and La/Al of 0, 0.25 and 0.5.…”

Section: Hydrotalcites In the Photodegradation Of Pharmaceuticalsmentioning

confidence: 99%

Hydrotalcite-like compounds and related materials as catalysts for the photodegradation of pharmaceutical compounds: Synthesis and catalytic performances

Santamarı́a

Gil

Vicente

et al. 2020

Nano-Materials as Photocatalysts for Degradation of Environmental Pollutants

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The presence of pharmaceutical compounds in natural water is an increasing problem as these compounds have environmental effects even at low concentrations. Adsorption has been largely used for the removal of pollutants, in the last years advanced oxidation processes (AOPs) have gained attention, as they may lead to the complete degradation of the pollutants. Several solids have been used as photocatalysts, from TiO2, by far the most used, to some families of other materials. In the present chapter, a review on the use of hydrotalcite-like compounds, also known as Layered Double Hydroxides (LDHs), as catalysts for the photodegradation of pharmaceutical pollutants is presented.

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Novel Ag-ZnO-La2O2CO3 photocatalysts derived from the Layered Double Hydroxide structure with excellent photocatalytic performance for the degradation of pharmaceutical compounds

Cited by 20 publications

References 53 publications

ZnO-Zn2TiO4 heterostructure for highly efficient photocatalytic degradation of pharmaceuticals

ZnO-Zn2TiO4 heterostructure for highly efficient photocatalytic degradation of pharmaceuticals

Degradation of Caffeine by Heterogeneous Photocatalysis Using ZnO with Fe and Ag

Hydrotalcite-like compounds and related materials as catalysts for the photodegradation of pharmaceutical compounds: Synthesis and catalytic performances

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