Safdar Ammara, Mohamed Hamza Elsayed Ahmad, Muhaymin Abdul, Hkiri Khaoula, Matinise Nolubabalo, Maaza Malik
UNESCO-UNISA Africa Chair in Nanosciences-Nanotechnology, College of Graduate Studies, University of South Africa, P.O. Box 392, Muckleneuk RidgePretoria, South Africa.
Material Research Department (MRD), Nanosciences African Network (NANOAFNET), iThemba LABS-National Research Foundation, 1 Old Faure Road, Somerset West, PO Box 722, Somerset West, 7129, Western Cape, South Africa.
Sci Rep. 2024 Jul 31;14(1):17620. doi: 10.1038/s41598-024-68574-6.
Green synthesis aligns with the global demand for eco-friendly and sustainable technologies, reducing the dependency on harmful chemicals and high-energy processes typically used in conventional synthesis techniques. This study highlights a novel green synthesis route for nickel cobaltite nanoparticles (NiCOO NPs) utilizing Hyphaene thebaica extract as a natural reducing and stabilizing agent. The synthesized NiCOO NPs, with sizes ranging from 20 to 30 nm, exhibited uniform diamond-like structures as confirmed by SEM and TEM imaging. XRD analysis verified the polycrystalline nature of these nanoparticles, while EDS measurements confirmed the elemental composition of Ni and Co. The presence of functional groups was subsequently verified through FT-IR analysis, and Raman spectroscopy further confirmed phase formation. Electrochemical evaluations revealed significant pseudocapacitive behavior, showing a specific capacitance of 519 F/g, demonstrating their potential for high-performance supercapacitors. To further assess the applicability of the synthesized NiCOO NPs, their photocatalytic activity against methylene blue (MB) dye was investigated, resulting in a 99% degradation rate. This impressive photocatalytic efficiency highlights their potential application in environmental remediation. Overall, this work underscores the significant potential of green synthesis methods in producing high-performance nanomaterials while simultaneously reducing environmental impact and promoting sustainable development.
绿色合成符合全球对环保和可持续技术的需求，减少了对传统合成技术中通常使用的有害化学品和高能量过程的依赖。本研究强调了一种利用海枣提取物作为天然还原剂和稳定剂合成钴酸镍纳米颗粒（NiCOO NPs）的新型绿色合成路线。合成的NiCOO NPs尺寸在20至30纳米之间，扫描电子显微镜（SEM）和透射电子显微镜（TEM）成像证实其呈现出均匀的类金刚石结构。X射线衍射（XRD）分析验证了这些纳米颗粒的多晶性质，而能谱（EDS）测量证实了镍和钴的元素组成。随后通过傅里叶变换红外光谱（FT-IR）分析验证了官能团的存在，拉曼光谱进一步证实了相的形成。电化学评估显示出显著的赝电容行为，比电容为519 F/g，表明它们在高性能超级电容器方面的潜力。为了进一步评估合成的NiCOO NPs的适用性，研究了它们对亚甲基蓝（MB）染料的光催化活性，降解率达到99%。这种令人印象深刻的光催化效率突出了它们在环境修复中的潜在应用。总体而言，这项工作强调了绿色合成方法在生产高性能纳米材料的同时减少环境影响和促进可持续发展方面的巨大潜力。
