二氧化硫（SO）和氨气（NH）与氧化石墨粉末表面环氧基团的反应。

Reactions of SO and NH with epoxy groups on the surface of graphite oxide powder.

作者信息

Xie Wenjing, Weng Lu-Tao, Chan Chak-Keung, Yeung King Lun, Chan Chi-Ming

机构信息

Division of Environment and Sustainability, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong.

出版信息

Phys Chem Chem Phys. 2018 Feb 28;20(9):6431-6439. doi: 10.1039/c8cp00524a.

DOI:10.1039/c8cp00524a

PMID:29443336

Abstract

Graphite oxide powder was obtained using the modified Hummers' method and characterized using X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS). The XPS results indicated that the epoxy groups were the main functional groups on the graphite oxide powder surface. The graphite oxide powder was then reacted with SO and NH gases, respectively, at 25 °C. The XPS and ToF-SIMS analyses of the surface of the reacted graphite oxide powder showed that the reactions mainly occurred in the epoxy groups. Bisulfate and amine groups were formed on the surface of the graphite oxide powder after the reactions between the graphite oxide powder and SO and NH gases. This work demonstrates a new method of removing SO and NH gases using graphite oxide powder.

摘要

采用改进的Hummers法制备了氧化石墨粉末，并通过X射线光电子能谱（XPS）和飞行时间二次离子质谱（ToF-SIMS）对其进行了表征。XPS结果表明，环氧基团是氧化石墨粉末表面的主要官能团。然后将氧化石墨粉末分别在25℃下与SO和NH气体反应。对反应后的氧化石墨粉末表面进行的XPS和ToF-SIMS分析表明，反应主要发生在环氧基团上。氧化石墨粉末与SO和NH气体反应后，在其表面形成了硫酸氢根和胺基。这项工作展示了一种使用氧化石墨粉末去除SO和NH气体的新方法。