Abstract We addressed the deposition of silver nanoparticles (Ag NPs) onto graphene oxide (GO) in the form of powder and paper (GOP), functionalized with amines and non-functionalized, for comparison. The functionalized supports were fabricated by means of solvent-free treatment with two aliphatic amines: 1-octadecylamine (ODA) and 1,8-diaminooctane (DAO). Ag NPs were generated in situ by using silver nitrate as a precursor and citric acid as a non-toxic and eco-friendly reducing agent. Characterization of chemical composition of GO-Ag hybrids was done by Fourier-transform infrared, X-ray photoelectron and energy dispersive X-ray spectroscopy, X-ray diffraction, thermogravimetric and differential thermal analysis. The morphology was studied by scanning and transmission electron microscopy. In addition, we compared electrical conductivity of GOP before and after functionalization with amines and decoration with Ag particles. While considerable particle agglomeration was observed on pristine GOP and GO powder, the prior amine functionalization gave rise to more controlled formation of Ag NPs in terms of size and distribution, with the best results obtained on 1,8-diaminooctane-functionalized supports. According to the results of DFT calculations, Ag NP binding is the strongest on pristine GO, followed by ODA and finally DAO-functionalized material, which correlates with the size and distribution of Ag nanoparticles observed experimentally.

中文翻译：

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氧化石墨烯-银纳米颗粒杂化物的环保合成：胺衍生化的影响

摘要 我们解决了银纳米粒子 (Ag NPs) 以粉末和纸 (GOP) 的形式沉积在氧化石墨烯 (GO) 上的问题，用于比较。通过用两种脂肪胺进行无溶剂处理来制备功能化载体：1-十八烷基胺 (ODA) 和 1,8-二氨基辛烷 (DAO)。Ag NPs 是通过使用硝酸银作为前体和柠檬酸作为无毒和环保的还原剂原位生成的。通过傅里叶变换红外光谱、X 射线光电子和能量色散 X 射线光谱、X 射线衍射、热重分析和差热分析对 GO-Ag 杂化物的化学成分进行表征。通过扫描和透射电子显微镜研究形态。此外，我们比较了用胺功能化和用银颗粒装饰前后 GOP 的电导率。虽然在原始 GOP 和 GO 粉末上观察到相当大的颗粒团聚，但先前的胺官能化导致在尺寸和分布方面更可控地形成 Ag NP，在 1,8-二氨基辛烷官能化载体上获得最佳结果。根据 DFT 计算结果，Ag NP 结合在原始 GO 上最强，其次是 ODA，最后是 DAO 功能化材料，这与实验观察到的 Ag 纳米粒子的大小和分布相关。先前的胺官能化在尺寸和分布方面产生了更可控的 Ag NPs 形成，在 1,8-二氨基辛烷官能化载体上获得了最佳结果。根据 DFT 计算结果，Ag NP 结合在原始 GO 上最强，其次是 ODA，最后是 DAO 功能化材料，这与实验观察到的 Ag 纳米粒子的大小和分布相关。先前的胺官能化在尺寸和分布方面产生了更可控的 Ag NPs 形成，在 1,8-二氨基辛烷官能化载体上获得了最佳结果。根据 DFT 计算结果，Ag NP 结合在原始 GO 上最强，其次是 ODA，最后是 DAO 功能化材料，这与实验观察到的 Ag 纳米粒子的大小和分布相关。