A new approach for the synthesis of zero-valent copper nanoparticles (CuNPs) supported on ordered mesoporous silica SBA-15 and SBA-16 by using vegetal antioxidants, coffee Robusta and green tea was developed in the present work. Diverse characterization techniques such as X-ray diffraction, nitrogen adsorption–desorption, transmission electron microscopy, thermogravimetric analysis, Fourier transform infrared spectroscopy and thermal programmed desorption of CO₂ and water allowed stating that the appreciable specific surface area and porosity favor CuNP formation. Copper-loaded SBA-15 and SBA-16 exhibited higher surface basicity and hydrophilic character according to the type of the source of reducing agents and silica framework, respectively. OH-compounds interactions with both CuNP and SBA surface and more particularly with available Si–O-Si groups were found to promote metal dispersion reducing the particle size. The results obtained herein open promising prospects for designing low cost and “green” silica-based materials with judiciously tailored basicity and hydrophilic character for catalysis, adsorption and other surface processes.

本工作开发了一种使用植物抗氧化剂、罗布斯塔咖啡和绿茶合成负载在有序介孔二氧化硅 SBA-15 和 SBA-16 上的零价铜纳米粒子 (CuNPs) 的新方法。多种表征技术，如 X 射线衍射、氮吸附-解吸、透射电子显微镜、热重分析、傅里叶变换红外光谱和 CO _{2 的}热程序解吸和水允许说明可观的比表面积和孔隙率有利于 CuNP 的形成。根据还原剂来源和二氧化硅骨架的类型，负载铜的 SBA-15 和 SBA-16 分别表现出更高的表面碱性和亲水性。发现 OH 化合物与 CuNP 和 SBA 表面的相互作用，尤其是与可用的 Si-O-Si 基团的相互作用，可以促进金属分散，降低颗粒尺寸。本文获得的结果为设计低成本和“绿色”二氧化硅基材料开辟了广阔的前景，这些材料具有明智地定制的碱性和亲水特性，用于催化、吸附和其他表面过程。