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Highly Exfoliated Graphene Oxide with Enhanced Carbonyl Content and Facile Amine Functionalization for Biomedical Applications
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-06-25 , DOI: 10.1021/acsanm.0c01597 Saifon Kullyakool 1 , Alongkot Treetong 1 , Siriwat Soontaranon 2 , Kritapas Laohhasurayotin 1
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-06-25 , DOI: 10.1021/acsanm.0c01597 Saifon Kullyakool 1 , Alongkot Treetong 1 , Siriwat Soontaranon 2 , Kritapas Laohhasurayotin 1
Affiliation
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A reroute process of Hummers’ method was carried out to reduce some steps in the synthesis of highly exfoliated graphene oxide (HEGO). Using pure KMnO4 and NaNO3 in concentrated H2SO4, HEGO was successfully prepared to contain extra carbonyl functional groups that helped stabilize the GO layer exfoliation. The oxidation reached its completion by one straight temperature level at 35 °C within a short reaction time (4 h). The obtained HEGO was observed to be highly dispersible through atomic force microscopy (AFM), scanning electron microscopy (SEM), and transmission electron microscope (TEM). The X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and thermogravimetric analysis (TGA) were also used to reveal the actual structure of HEGO and its analogues, which were formed from the reaction with aliphatic amines such as l-arginine (Arg) and β-alanine (Ala) as well as one aromatic amine, aniline (Ani). The results showed an interaction based on covalent bonding. The reduction reaction with l-ascorbic acid under basic conditions at 95 °C for 24 h was also performed. These facile functionalization and reduction process indicate the possible biomolecular adsorption.
中文翻译：
具有高羰基含量和易胺化功能的高度脱落的氧化石墨烯，用于生物医学应用
为了减少高度剥离的氧化石墨烯（HEGO）的合成，进行了Hummers方法的重排工艺。在浓H 2 SO 4中使用纯KMnO 4和NaNO 3，HEGO已成功制备出含有额外的羰基官能团，有助于稳定GO层的剥离。在短时间内（4小时）内，氧化在35°C下达到一个直的温度水平，从而完成了氧化。通过原子力显微镜（AFM），扫描电子显微镜（SEM）和透射电子显微镜（TEM）观察到所获得的HEGO具有高度分散性。还使用X射线光电子能谱（XPS），X射线衍射（XRD）和热重分析（TGA）来揭示HEGO及其类似物的实际结构，这些结构是由与脂肪胺（例如l）的反应形成的-精氨酸（Arg）和β-丙氨酸（Ala）以及一种芳香胺，苯胺（Ani）。结果显示基于共价键的相互作用。在碱性条件下，在95°C下用1-抗坏血酸进行还原反应24小时。这些容易的功能化和还原过程表明可能的生物分子吸附。
更新日期：2020-07-24
中文翻译：
具有高羰基含量和易胺化功能的高度脱落的氧化石墨烯，用于生物医学应用
为了减少高度剥离的氧化石墨烯（HEGO）的合成，进行了Hummers方法的重排工艺。在浓H 2 SO 4中使用纯KMnO 4和NaNO 3，HEGO已成功制备出含有额外的羰基官能团，有助于稳定GO层的剥离。在短时间内（4小时）内，氧化在35°C下达到一个直的温度水平，从而完成了氧化。通过原子力显微镜（AFM），扫描电子显微镜（SEM）和透射电子显微镜（TEM）观察到所获得的HEGO具有高度分散性。还使用X射线光电子能谱（XPS），X射线衍射（XRD）和热重分析（TGA）来揭示HEGO及其类似物的实际结构，这些结构是由与脂肪胺（例如l）的反应形成的-精氨酸（Arg）和β-丙氨酸（Ala）以及一种芳香胺，苯胺（Ani）。结果显示基于共价键的相互作用。在碱性条件下，在95°C下用1-抗坏血酸进行还原反应24小时。这些容易的功能化和还原过程表明可能的生物分子吸附。
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