ABDELHAKIM Kheniche
خنيش عبدالحكيم
abdelhakim.kheniche@univ-msila.dz
0671708571
- Departement of Chemistry
- Faculty of Sciences
- Grade MCA
About Me
Research Domains
synthèse organique Corrosion Extraction des substances naturelles Activités biologiques
LocationMsila, Msila
Msila, ALGERIA
Code RFIDE- 1975-01-01 00:00:00
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ABDELHAKIM Kheniche birthday
- 2025-10-15
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2025-10-15
Valorization of Date Seed Waste for Sustainable Dermocosmetic Sunscreens: Phytochemical Insights and Formulation Advances
Valorization of Phoenix dactylifera L. (date) seeds, an abundant agro-industrial byproduct, offer a sustainable approach to developing multifunctional ingredients for dermocosmetic photoprotection. Rich in polyphenols, flavonoids, and lipophilic antioxidants, date seed extracts and oils demonstrate promising UV-absorbing, anti-inflammatory, and free-radical-scavenging properties. Recent in vitro, ex vivo, and preclinical studies underscore their potential as bioactive agents in sunscreen formulations, supporting both skin barrier integrity and oxidative stress mitigation, although clinical validation is still required. This review consolidates current knowledge on the phytochemical profile and biological efficacy of date seed derivatives, with emphasis on their integration into advanced delivery systems such as nanocarriers, Pickering emulsions, and cyclodextrin complexes to enhance photostability, skin permeability, and esthetic acceptability. Safety aspects, including allergenicity, phototoxicity, and regulatory gaps, are critically examined alongside environmental and ethical advantages, including biodegradability and vegan suitability. The findings advocate for the inclusion of Phoenix dactylifera L. seed actives in next-generation dermocosmetic sunscreens that align with circular bioeconomy principles, consumer demand for “reef-safe” products, and evolving international regulations. Further clinical validation is encouraged to fully translate these botanically derived agents into effective and ethically sound sun care innovations.
Citation
Abdelhakim KHENICHE , , (2025-10-15), Valorization of Date Seed Waste for Sustainable Dermocosmetic Sunscreens: Phytochemical Insights and Formulation Advances, Cosmetics, Vol:12, Issue:5, pages:225, mdpi
- 2025-10-02
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2025-10-02
Green synthesis of ZnO and CuO nanoparticles and ZnO-CuO nanocomposites: Characterization and photocatalytic dyes removal efficiency’s determination
This study reports the green biogenic synthesis of zinc oxide (ZnO) and copper oxide (CuO) nanoparticles, as well as ZnO–CuO nanocomposites, using an aqueous extract of Capparis spinosa L. leaves. The prepared nanomaterials were extensively characterized, and their photocatalytic performance was assessed under simulated solar light irradiation and ambient conditions for the degradation of anionic (Rose Bengal) and cationic (Rhodamine B) dyes as model of wastewater pollutants. The crystal structure of the photocatalysts was examined using X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM) was employed to disclose the powder’s morphology, and Fourier-transform infrared spectroscopy (FTIR) highlighted the role of plant-derived bio- molecules as capping and stabilizing agents. Thermogravimetric analysis (TGA) allowed the evaluation of the nanoparticles’ stability, while optical and electrochemical measures were performed to study the electronic behavior of the photocatalysts. After 2 h of irradiation in the presence of 0.3 g/l of ZnO, CuO, or ZnO–CuO, the conversion of Rose Bengal reached 97.1 %, 87.8 %, and 99.9 %, respectively, while 27.5 %, 17.8 %, and 33.9 % were the values obtained for Rhodamine B. This finding demonstrates the effectiveness of our synthesis method as a green and sustainable approach in developing highly active photocatalysts for environmental remediation.
Citation
Meriem Imane KHALED , Abdelhakim KHENICHE , Muhammed Umair, Claudio Maria Pecoraro, Marianna Bellardita, Soltani Soufiane, , (2025-10-02), Green synthesis of ZnO and CuO nanoparticles and ZnO-CuO nanocomposites: Characterization and photocatalytic dyes removal efficiency’s determination, Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol:728, Issue:927, pages:0927-7757, Elsevier B.V.
- 2025-07-22
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2025-07-22
Solar light driven green synthesis of ZnO nanoparticles for effective photodecomposition of basic fuchsine dye and its antimicrobial properties
In this study, ZnO Nano-particles (ZnO NPs) were synthesized by green chemis- try using an aqueous extract of Salvia Verbenaca leaves (S. Verbenaca) for the first time. The as-prepared ZnO NPs were characterized by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), UV–Vis spectroscopy, FT-IR spectroscopy, thermo gravimetry (TG) and BET analysis. The diffractogram confirmed the hex-agonal structure of ZnO NPs with crystallite size of 50 nm, while the SEM image revealed that the particles are agglomerated with a spherical shape. The optical properties of ZnO NPs were studied and the band gap (3.01 eV) was determined from the diffuse reflectance. The FT-IR spectra indicated the presence of biomol-ecules from the plant extract acting as capping agent. The TG analysis indicated the formation of ZnO NPs and BET analysis, confirmed the formation of a mesoporous NPs. The photocatalytic activity of ZnO NPs was evaluated through the degrada- tion of Basic Fuchsine (BF), a hazardous dye under solar irradiation. This study was undertaken by varying the physical parameters namely the initial concentration of the dye (Co: 5–50 ppm), the catalyst dose (10–45 mg) the extract dose (5–15 g/L). The results show that the best abatement was obtained for the initial concentration of 10 mg/L and 45 mg of ZnO NPs. More interestingly, we also prepared the hetero-junction (90% ZnO–10% CuO) and a degradation yield of 90% was reached after 90 min under sunlight. The stability test shows that the product maintains its effec-tiveness after 4 successive cycles as checked by FT-IR spectroscopy. The oxidation state of Zn was investigated by XPS analysis and the elements Zn and O are indi-cated by the surface survey spectrum. The photoluminescence shows strong emis- sion at 528 nm, associated to surface defects on the nanoparticles. Additionally, ZnO NPs exhibited potent antibacterial activity against both Gram (positive–negative) bacteria, with a higher effectiveness observed for Gram-positive strains. This work highlights the potential of S. Verbenaca-mediated ZnO NPs as an eco-friendly solution for environmental remediation and antimicrobial applications.
Citation
Meriem Imane KHALED , Abdelhakim KHENICHE , Kadi Imededdine, Trari Mohamed, Bagtache Radia, , (2025-07-22), Solar light driven green synthesis of ZnO nanoparticles for effective photodecomposition of basic fuchsine dye and its antimicrobial properties, Reaction Kinetics, Mechanisms and Catalysis, Vol:138, Issue:6, pages:4369-4383, Springer Nature