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Adsorption characteristics of graphene oxide nanosheets on cement

机译：石墨烯氧化物纳米液对水泥的吸附特征

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Modifying cement with graphene oxide (GO) nanosheets tremendously improves its mechanical properties but decreases its fluidity. The adsorption characteristics between GO and cement play a pivotal role in the influence on fluidity. In this paper, the adsorption characteristics of graphene oxide nanosheets on cement were investigated using scanning electron microscopy (SEM), total organic carbon (TOC), Fourier transform infrared spectra (FTIR) and XPS analyses. The results show that GO nanosheets have a strong adsorption ability on the cement surface. The adsorption data was best fitted with the Freundlich adsorption isotherm model and described by a pseudo-second order kinetics model. The adsorption process includes a chemical reaction where the –COOH groups on the edge of the GO nanosheets react with metal cations. The adsorption layer thickness of the GO nanosheets on the cement was about 10.16 nm.
机译：用石墨烯（GO）纳米片的改性水泥巨大地改善其机械性能，但减少其流动性。去和水泥之间的吸附特性在对流动性的影响下起着枢轴作用。本文采用扫描电子显微镜（SEM），总有机碳（TOC），傅里叶变换红外光谱（FTIR）和XPS分析，研究了石墨烯氧化物纳米液对水泥上的吸附特性。结果表明，GO纳米片在水泥表面上具有很强的吸附能力。吸附数据最适合配备Freundlich吸附等温线模型，并由伪二阶动力学模型描述。吸附过程包括化学反应，其中Go纳米晶片边缘上的-COOH基团与金属阳离子反应。水泥上的GO纳米片的吸附层厚度为约10.16nm。

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