Sana Akir | Faculté des Sciences de Bizerte (original) (raw)
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Papers by Sana Akir
Nanoscale
2D/0D and 2D/2D nanoarchitectonics of V2C/Bi and V2C/BiVO4 is capable to enhance the electrocatal... more 2D/0D and 2D/2D nanoarchitectonics of V2C/Bi and V2C/BiVO4 is capable to enhance the electrocatalytic activities of HER and NRR.
Small methods, Apr 19, 2023
Journal of Materials Chemistry C, 2023
Energy shortage and environmental pollution issues are among the biggest challenges of this centu... more Energy shortage and environmental pollution issues are among the biggest challenges of this century. Therefore, research into innovative new materials to overcome such issues is urgently required. In this context, this study reports the one-pot synthesis of a novel 2D titanium carbo-oxide layered structure using a simple and eco-friendly method. Then, its potential applications as a gas sensor and supercapacitor were evaluated for the first time. The 2D titanium carbo-oxide layered structure was prepared via a solvothermal method by exfoliation of the Ti 3 AlC 2 MAX phase with tetramethylammonium hydroxide. X-ray diffraction, Raman spectroscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy characterizations demonstrated that pure 2D titanium carbo-oxide flakes with a layered structure were successfully obtained. The synthesized nanomaterial showed a very good sensing response and high selectivity towards methanol at room temperature against ethanol and other volatile organic compounds. The investigation of its supercapacitor performance in three different aqueous electrolytes revealed that this 2D nanomaterial had a high potential window of 1.8 V in Na 2 SO 4 , high specific capacitance of 161 F g À1 in H 2 SO 4 , and 87.1% capacitance retention after 2500 cycles in KOH. The probably reduced interlayer spacing can explain the underlying mechanism of the sensor and its electrochemical capacitance.
![Research paper thumbnail of Corrigendum to ‘Eco-friendly synthesis of ZnO nanoparticles with different morphologies and their visible light photocatalytic performance for the degradation of Rhodamine B’ [Ceram. Int. (2016) 10259–10265]](https://attachments.academia-assets.com/93881785/thumbnails/1.jpg)
](Ceramics International, 2016
Corrigendum to 'Eco-friendly synthesis of ZnO nanoparticles with different morphologies and their... more Corrigendum to 'Eco-friendly synthesis of ZnO nanoparticles with different morphologies and their visible light photocatalytic performance for the degradation of Rhodamine B' [Ceram. Int.
Applied Surface Science, 2017
Highlights C-ZnO nanocomposite was successfully prepared via a facile and eco-friendly process.... more Highlights C-ZnO nanocomposite was successfully prepared via a facile and eco-friendly process. C-ZnO NPs have excellent photocatalytic activity for RhB dye degradation under visible light irradiation compared with literature. The visible photocatalytic properties originate from injection ein CB of ZnO from RhB.
Ceramics International, 2016
Eco-friendly synthesis of ZnO nanoparticles with different morphologies and their visible light p... more Eco-friendly synthesis of ZnO nanoparticles with different morphologies and their visible light photocatalytic performance for the degradation of Rhodamine B, Ceramics International,
ZnO nanoparticles (NPs) with various morphologies were obtained at low-temperature using an econo... more ZnO nanoparticles (NPs) with various morphologies were obtained at low-temperature using an economic and eco-friendly co-precipitation process. X-ray diffraction analysis confirms the formation of pure wurtzite ZnO phase with crystallite size in the 29-32 nm range, while scanning and transmission electron microscopic observations reveal various morphologies (spherical NPs, nanosheets and hexagonal prismatic NPs) as a function of the precursors mixing protocol. The estimated band gap of the asprepared NPs calculated on the basis of Kubelka-Munk function was found to be lower than the known band gap energy of bulk ZnO (3.21-3.26 eV compared to 3.37 eV) which was attributed to oxygen vacancies. Photoluminescence spectra showed that the as-prepared NPs have dissimilar amount of point defects. The strongest intensity of the visible emission was observed for spherical NPs, which implies an increased fraction of oxygen. This sample also exhibited a higher photocatalytic activity for the degradation of Rhodamine B (RhB) under visible light irradiation.
Nanoscale
2D/0D and 2D/2D nanoarchitectonics of V2C/Bi and V2C/BiVO4 is capable to enhance the electrocatal... more 2D/0D and 2D/2D nanoarchitectonics of V2C/Bi and V2C/BiVO4 is capable to enhance the electrocatalytic activities of HER and NRR.
Small methods, Apr 19, 2023
Journal of Materials Chemistry C, 2023
Energy shortage and environmental pollution issues are among the biggest challenges of this centu... more Energy shortage and environmental pollution issues are among the biggest challenges of this century. Therefore, research into innovative new materials to overcome such issues is urgently required. In this context, this study reports the one-pot synthesis of a novel 2D titanium carbo-oxide layered structure using a simple and eco-friendly method. Then, its potential applications as a gas sensor and supercapacitor were evaluated for the first time. The 2D titanium carbo-oxide layered structure was prepared via a solvothermal method by exfoliation of the Ti 3 AlC 2 MAX phase with tetramethylammonium hydroxide. X-ray diffraction, Raman spectroscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy characterizations demonstrated that pure 2D titanium carbo-oxide flakes with a layered structure were successfully obtained. The synthesized nanomaterial showed a very good sensing response and high selectivity towards methanol at room temperature against ethanol and other volatile organic compounds. The investigation of its supercapacitor performance in three different aqueous electrolytes revealed that this 2D nanomaterial had a high potential window of 1.8 V in Na 2 SO 4 , high specific capacitance of 161 F g À1 in H 2 SO 4 , and 87.1% capacitance retention after 2500 cycles in KOH. The probably reduced interlayer spacing can explain the underlying mechanism of the sensor and its electrochemical capacitance.
Ceramics International, 2016
Corrigendum to 'Eco-friendly synthesis of ZnO nanoparticles with different morphologies and their... more Corrigendum to 'Eco-friendly synthesis of ZnO nanoparticles with different morphologies and their visible light photocatalytic performance for the degradation of Rhodamine B' [Ceram. Int.
Applied Surface Science, 2017
Highlights C-ZnO nanocomposite was successfully prepared via a facile and eco-friendly process.... more Highlights C-ZnO nanocomposite was successfully prepared via a facile and eco-friendly process. C-ZnO NPs have excellent photocatalytic activity for RhB dye degradation under visible light irradiation compared with literature. The visible photocatalytic properties originate from injection ein CB of ZnO from RhB.
Ceramics International, 2016
Eco-friendly synthesis of ZnO nanoparticles with different morphologies and their visible light p... more Eco-friendly synthesis of ZnO nanoparticles with different morphologies and their visible light photocatalytic performance for the degradation of Rhodamine B, Ceramics International,
ZnO nanoparticles (NPs) with various morphologies were obtained at low-temperature using an econo... more ZnO nanoparticles (NPs) with various morphologies were obtained at low-temperature using an economic and eco-friendly co-precipitation process. X-ray diffraction analysis confirms the formation of pure wurtzite ZnO phase with crystallite size in the 29-32 nm range, while scanning and transmission electron microscopic observations reveal various morphologies (spherical NPs, nanosheets and hexagonal prismatic NPs) as a function of the precursors mixing protocol. The estimated band gap of the asprepared NPs calculated on the basis of Kubelka-Munk function was found to be lower than the known band gap energy of bulk ZnO (3.21-3.26 eV compared to 3.37 eV) which was attributed to oxygen vacancies. Photoluminescence spectra showed that the as-prepared NPs have dissimilar amount of point defects. The strongest intensity of the visible emission was observed for spherical NPs, which implies an increased fraction of oxygen. This sample also exhibited a higher photocatalytic activity for the degradation of Rhodamine B (RhB) under visible light irradiation.