A Novel Conductometric Micro-sensor for Methanol Detection Based on Chitosan/Zinc Sulfide-Nanoparticles Composite Obtained by Green Synthesis

Ouni, Sabri; Madaci, Anis; Haouari, Mohamed; Mohamed, Naim Bel Haj; Bessueille, François; Elaı̈ssari, Abdelhamid; Errachid, Abdelhamid; Jaffrézic‐Renault, Nicole

doi:10.1007/s10904-023-02696-8

Cited by 2 publications

(1 citation statement)

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“…In addition to their interesting fundamental properties, these NPs have can have different technological applications (Kishore et al 2023). They are likely to give rise to a new generation of electronic (Samadi et al 2022), optoelectronic (Hassan et al 2023) and biological devices (Baretta et al 2023), with a major impact on diverse sectors including lighting (Sarker and Ahn 2023), sensors (Ouni et al 2023a), lasers (Jiang et al 2022), photovoltaics (Wang et al 2023), biomarkers (Jang et al 2023) and medical imaging (Chen et al 2023). An intensive research has performed on the study and development of group II-VI binary NPs, in particular, those containing cadmium (e.g., CdSe, CdS, CdTe) (Kandasamy et al 2023; Gan et al 2023;Liu et al 2023).…”

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confidence: 99%

An effective and sustainable dye removal via sunlight-based photocatalysis and adsorption using eco-friendly and low-cost ZnS nanoparticles: Experiments, modelling, and mechanism

Ouni,

Yahia,

Mohamed

et al. 2024

Preprint

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Novel sulfur zinc nanoparticles functionalized with thioglycolic acid were synthetized via hydrothermal route and tested in a solar radiation-based dye photodegradation process. These nanoparticles were characterized, and the findings revealed that thioglycolic acid was a strong capping ligand for the generation of sulfur zinc nanoparticles with a specific surface area of 36.82 m2/g and 7.15 nm average nanocrystal size. The cubic and wurtzite phases of these nanoparticles were confirmed via X-ray diffraction. The quantum confinement effect caused a larger energy band gap and a blue shift in the absorbance band of these nanoparticles in contrast to the bulk sulfur zinc. The improved adsorption effectiveness of these nanoparticles was proved to remove methylene blue from aqueous solutions. They can remove 30.92 mg/g of tested dye molecule. To understand the synergy between adsorption and photocatalysis, these nanoparticles were used to analyze the dye adsorption prior to the photodegradation via the experimental measurement of isotherms and kinetics. The rationalization of the dye adsorption on these nanoparticles was performed with calculated statistical physics parameters including the estimation of dye – nanoparticles adsorption energy. Dye molecules and nanoparticles surface exhibited physical interactions with adsorption energies of 25.92–23.31 kJ/mol. The sunlight-based photocatalytic activity of these nanoparticles demonstrated 91.1% dye degradation efficiency in 180 min. Overall, the photocatalytic efficiency remained almost unchanged after five consecutive degradation cycles with a methylene blue degradation of 88 ± 3%. These results indicate that these sustainable nanoparticles can be applied in the cleaning of industrial and urban fluids polluted by hazardous organic compounds like dye molecules.

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