Department of Plant Production and Genetic, Faculty of Agriculture, University of Maragheh, P.O. Box 55181-83111, Maragheh, Iran.
Organic and Nano Group (ONG), Department of Chemistry, Faculty of Science, University of Maragheh, PO Box 55181-83111, Maragheh, Iran.
Environ Sci Pollut Res Int. 2019 Apr;26(12):11719-11729. doi: 10.1007/s11356-019-04437-2. Epub 2019 Feb 26.
In the present work, the effect of graphene oxide (GO) architecture and synthesis of gold nanoparticles (Au) on the surface of GO by using Euphorbia leaf extract was investigated. The as-synthesized catalyst was utilized for reduction of 4-nitrophenol (4-NP) and methylene-blue (MB). The ethanol/water extract of the leaves of Euphorbia was found as a non-toxic, suitable, eco-friendly natural reducing agent in one-step generation of Au nanoparticles onto the GO. The catalyst was characterized by different analysis such as atomic force microscopy, powder X-ray diffraction, field emission scanning electron microscopy, energy dispersive X-ray spectroscopy, SEM-mapping, transmission electron microscopy, and atomic absorption spectrometry. The high catalytic performance of the surfactant exfoliated gold-GO (SE-Au/GO) towards the reduction of 4-NP to 4-aminophenol (4-AP) and reduction of MB to leucomethylene blue (LMB) under mild conditions, in water and at room temperature, was exhibited. Graphical abstract.
在本工作中，研究了氧化石墨烯（GO）的结构和金纳米粒子（Au）的合成对GO 表面的影响，方法是使用大戟叶提取物。所合成的催化剂用于还原 4-硝基苯酚（4-NP）和亚甲基蓝（MB）。发现大戟叶的乙醇/水溶液在一步法中将 Au 纳米粒子生成到 GO 上时是一种无毒、合适、环保的天然还原剂。通过原子力显微镜、粉末 X 射线衍射、场发射扫描电子显微镜、能谱 X 射线分析、SEM 映射、透射电子显微镜和原子吸收光谱等不同分析对催化剂进行了表征。在温和条件下，在水中和室温下，表面活性剂剥离金-氧化石墨烯（SE-Au/GO）对 4-NP 还原为 4-氨基酚（4-AP）和 MB 还原为无色亚甲蓝（LMB）表现出高催化性能。示意图。
