Brisebois Patrick P, Izquierdo Ricardo, Siaj Mohamed
Department of Chemistry, Université du Québec à Montréal, NanoQAM/QCAM, Montreal, QC H3C 3P8, Canada.
École de Technologie Supérieure, Université du Québec, Montreal, QC H3C 1K3, Canada.
Nanomaterials (Basel). 2020 Jun 28;10(7):1255. doi: 10.3390/nano10071255.
Headed for developing minimalistic strategies to produce graphene@metal hybrids for electronics on a larger scale, we discovered that graphene oxide (GO)-metal oxide (MO) hybrids are formed spontaneously in water at room temperature in the presence of nothing else than graphene oxide itself and metal ions. Our observations show metal oxide nanoparticles decorating the surface of graphene oxide with particle diameter in the range of 10-40 nm after only 1 h of mixing. Their load ranged from 0.2% to 6.3% depending on the nature of the selected metal. To show the generality of the reactivity of GO with different ions in standard conditions, we prepared common hybrids with GO and tin, iron, zinc, aluminum and magnesium. By means of carbon-13 solid-state nuclear magnetic resonance using magic angle spinning, we have found that graphene oxide is also moderately reduced at the same time. Our method is powerful and unique because it avoids the use of chemicals and heat to promote the coprecipitation and the reduction of GO. This advantage allows synthesizing GO@MO hybrids with higher structural integrity and purity with a tunable level of oxidization, in a faster and greener way.
在致力于开发简约策略以大规模生产用于电子产品的石墨烯@金属杂化物的过程中，我们发现，在室温下的水中，仅在存在氧化石墨烯本身和金属离子的情况下，氧化石墨烯（GO）-金属氧化物（MO）杂化物会自发形成。我们的观察结果表明，仅混合1小时后，金属氧化物纳米颗粒就会装饰在氧化石墨烯表面，粒径范围为10-40纳米。其负载量根据所选金属的性质在0.2%至6.3%之间。为了展示在标准条件下GO与不同离子反应的普遍性，我们制备了GO与锡、铁、锌、铝和镁的常见杂化物。通过使用魔角旋转的碳-13固态核磁共振，我们发现氧化石墨烯同时也会适度还原。我们的方法强大且独特，因为它避免了使用化学物质和热量来促进共沉淀以及GO的还原。这一优势使得能够以更快、更环保的方式合成具有更高结构完整性和纯度、氧化程度可调的GO@MO杂化物。
