González-Ballesteros N, Rodríguez-González J B, Rodríguez-Argüelles M C
Departamento de Química Inorgánica, Universidade de Vigo, 36310 Vigo, Spain.
Centro de Apoyo Científico-Tecnológico a la Investigación. Universidade de Vigo, 36310 Vigo, Spain.
J Photochem Photobiol B. 2018 Jan;178:302-309. doi: 10.1016/j.jphotobiol.2017.11.025. Epub 2017 Nov 21.
In recent years, the management of food waste processing has emerged as a major concern. One such type of food waste, grape pomace, has been shown to be a great source of bioactive compounds which might be used for more environmentally - friendly processes for the synthesis of nanomaterials. In this study, grape pomace of Vitis vinifera has been used for the obtainment of an aqueous extract. Firstly, the reducing activity, total phenolic content and DPPH scavenging activity of the aqueous extract were determined. Then, the aqueous extract was used for the synthesis of gold and silver nanoparticles. The formation of spherical and stable nanoparticles with mean diameters of 35.3±5.2nm for Au@GP and 42.9±6.4nm for Ag@GP was confirmed by UV-vis spectroscopy and transmission electron microscopy. Furthermore, the functional group of biomolecules present in grape pomace extract, Au@GP and Ag@GP, were characterized by Fourier transform infrared spectroscopy prior to and after the synthesis, in order to obtain information about the biomolecules involved in the reducing and stabilization process. This study is the first to deal with the use of Vitis vinifera grape pomace in obtaining gold and silver nanoparticles through an eco-friendly, quick, one-pot synthetic route.
近年来，食品废弃物处理的管理已成为一个主要问题。葡萄渣就是这样一种食品废弃物，它已被证明是生物活性化合物的重要来源，这些化合物可用于更环保的纳米材料合成过程。在本研究中，酿酒葡萄的葡萄渣被用于制备水提取物。首先，测定了水提取物的还原活性、总酚含量和DPPH清除活性。然后，将水提取物用于金和银纳米颗粒的合成。通过紫外可见光谱和透射电子显微镜证实了形成了球形且稳定的纳米颗粒，Au@GP的平均直径为35.3±5.2nm，Ag@GP的平均直径为42.9±6.4nm。此外，在合成前后通过傅里叶变换红外光谱对葡萄渣提取物、Au@GP和Ag@GP中存在的生物分子的官能团进行了表征，以便获得有关参与还原和稳定过程的生物分子的信息。本研究首次涉及通过环保、快速的一锅法合成路线，利用酿酒葡萄的葡萄渣来制备金和银纳米颗粒。
