Talabani Rebwar Faiq, Hamad Samir Mustafa, Barzinjy Azeez Abdullah, Demir Usame
Department of Mechanical Engineering, Engineering and Architecture Faculty, Bingöl University, 12000 Bingöl, Turkey.
Scientific Research Centre, Soran University, Soran 44008, Iraq.
Nanomaterials (Basel). 2021 Sep 17;11(9):2421. doi: 10.3390/nano11092421.
Silver (Ag) nanoparticles (NPs) have been synthesized through an easy, inexpensive, and ecofriendly method. , parsley, leaf extract was utilized as a reducing, capping, and stabilizing agent, without using any hazardous chemical materials, for producing Ag NPs. The biosynthesized Ag NPs were characterized using different characterization techniques, namely UV-Vis, FT-IR spectroscopy, X-ray diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), dynamic light scattering (DLS), zeta potential, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), transmission electron microscope (TEM), field emission scanning electron microscopy (FESEM), and energy-dispersive X-ray (EDX) analysis to investigate the optical, thermal, structural, morphological, and chemical properties of the plant extract and the biosynthesized Ag NPs. After that, the biosynthesized Ag NPs were utilized in harvesting sunlight for solar thermal generation. Surface plasmon resonance (SPR) for the green synthesized Ag NPs with the dark color were adjusted at nearly 450 nm. Once the Ag NPs are excited at the SPR, a large amount of heat is released, which causes a change in the local refractive index surrounding the Ag NPs. The released heat from the Ag NPs under the solar irradiation at the precise wavelength of plasmon resonance significantly increased the temperature of the aqueous medium. Different percentages of Ag NPs were dispersed in water and then exposed to the sunlight to monitor the temperature of the suspension. It was found that the temperature of the aqueous medium reached its highest point when 0.3 wt. % of Ag NPs was utilized. This investigation is rare and unique, and it shows that utilizing a small amount of the biosynthesized Ag NPs can increase the temperature of the aqueous medium remarkably.
银（Ag）纳米颗粒（NPs）已通过一种简便、廉价且环保的方法合成。使用欧芹叶提取物作为还原剂、封端剂和稳定剂，在不使用任何有害化学材料的情况下制备银纳米颗粒。利用不同的表征技术对生物合成的银纳米颗粒进行了表征，即紫外可见光谱、傅里叶变换红外光谱（FT-IR）、X射线衍射（XRD）、X射线光电子能谱（XPS）、动态光散射（DLS）、zeta电位、差示扫描量热法（DSC）、热重分析（TGA）、透射电子显微镜（TEM）、场发射扫描电子显微镜（FESEM）和能量色散X射线（EDX）分析，以研究植物提取物和生物合成的银纳米颗粒的光学、热学、结构、形态和化学性质。之后，将生物合成的银纳米颗粒用于收集阳光以进行太阳能热发电。绿色合成的深色银纳米颗粒的表面等离子体共振（SPR）调整在近450nm。一旦银纳米颗粒在SPR处被激发，就会释放大量热量，这会导致银纳米颗粒周围局部折射率发生变化。在等离子体共振的精确波长下，太阳辐射下银纳米颗粒释放的热量显著提高了水介质的温度。将不同百分比的银纳米颗粒分散在水中，然后暴露在阳光下以监测悬浮液的温度。发现当使用0.3wt.%的银纳米颗粒时，水介质的温度达到最高点。这项研究罕见且独特，它表明使用少量生物合成的银纳米颗粒可以显著提高水介质的温度。
