Synthesis and characterization of ethylenediamine functionalized graphene oxide‑modified UiO‑66‑NH2 for quinoline removal

서지정보

ㆍ발행기관 : 한국탄소학회 ㆍ수록지정보 : Carbon letters / 32권 / 7호
ㆍ저자명 : Mathule Mokgohloa, Adeniyi S. Ogunlaja

목차

Abstract
1 Introduction
2 Experiment section
2.1 Chemicals
2.2 Material synthesis
2.3 Quinoline adsorption
2.4 Kinetics analysis
2.5 Computational methods
2.6 Characterization
3 Results and discussion
3.1 FT-IR analysis
3.2 UV–Vis and band gap analysis
3.3 P-XRD analysis
3.4 SEM
3.5 EDX
3.6 BET surface area
3.7 Quinoline uptake studies
3.8 Theoretical studies
4 Conclusion
Acknowledgements
References

영어 초록

In this study, UiO-66-NH2 was synthesized and incorporated with graphene aerosol (UiO-66-NH2/GA) and ethylenediamine functionalized graphene oxide (UiO-66-NH2/GO-NH2). These composites were characterized using infrared spectroscopy, powder X-ray diffraction, ultraviolet–visible light spectroscopy, scanning electron microscope, and energy-dispersive X-ray spectroscopy. UiO-66-NH2/GO-NH2 exhibited 93% adsorption of quinoline in 5 h, UiO-66-NH2 and UiO-66-NH2/GA presented 80.4% and 86.5%, respectively. The high adsorption observed on UiO-66-NH2/GO-NH2 was attributed to the unique electronic properties, and hydrogen bonding between the nitrogen atom of quinoline and NH2- phenyl fragment of UiO-66-NH2, and N–H of ethylenediamine. GO also offered combined strong π–π interactions on its surface, and the oxygen coverage (~ 50%) on GO within the structure is responsible for the formation of strong hydrogen bonds with quinoline. Theoretical calculation suggested that UiO-66-NH2/GO-NH2 presented a more favourable adsorption energy (− 18.584 kcal/ mol) compared to UiO-66-NH2 (− 16.549 kcal/mol) and UiO-66-NH2/GA (− 13.991 kcal/mol). These results indicate that nanocomposites have a potential application in quinoline capture technologies in the process of adsorptive denitrogenation.

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