Adsorption of organic solvent vapours on pristine and doped few-layer graphene nanoflakes

IF 3 4区工程技术 Q3 CHEMISTRY, PHYSICAL

Adsorption Pub Date : 2025-01-25 DOI:10.1007/s10450-024-00589-x

Stepan Yu. Kupreenko, Dmitry N. Stolbov, Sergey A. Chernyak, Konstantin I. Maslakov, Natalia E. Strokova, Mikhail M. Levin, Ekaterina A. Arkhipova, Anton S. Ivanov, Serguei V. Savilov

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引用次数: 0

Abstract

Heterosubstitution is widely used to control the surface properties of graphene materials. The knowledge of the mechanism of organic solvent vapour sorption on doped graphene materials is necessary for development of air purification technologies, volatile organic compounds sensors, metal-free catalysis and for many other applications. The effect of N, S and Si doping and oxidative functionalization of few-layer graphene nanoflakes on the adsorption of organic solvent vapours was measured. The nanoflakes were also analyzed by TEM, XPS, Raman spectroscopy and low-temperature nitrogen physisorption. Special attention was paid to the dependence of the isosteric heat of adsorption on the surface coverage for various adsorbate-adsorbent pairs, which carry information about the energy inhomogeneity of the surface, the hierarchy of adsorbate-adsorbate, adsorbate-basal plane and adsorbate-functional groups interactions, and the mechanism of adsorption. This dependence for the hexane sorption can be used to detect hydrophilic groups on the surface, and to compare the degree of curvature of graphene layers in different heterosubstituted graphene materials.

Graphical Abstract

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有机溶剂蒸汽在原始和掺杂少层石墨烯纳米片上的吸附

杂取代被广泛用于控制石墨烯材料的表面性质。了解有机溶剂蒸汽在掺杂石墨烯材料上的吸附机理，对于发展空气净化技术、挥发性有机化合物传感器、无金属催化和许多其他应用是必要的。考察了N、S、Si掺杂和氧化功能化对石墨烯纳米片吸附有机溶剂蒸气的影响。采用透射电镜（TEM）、XPS、拉曼光谱（Raman）和低温氮物理吸附对纳米薄片进行了分析。特别关注了各种吸附-吸附剂对的等等吸附热对表面覆盖的依赖性，这些对携带了表面能量不均匀性、吸附-吸附、吸附-基面和吸附-官能团相互作用的层次以及吸附机理的信息。这种对己烷吸附的依赖性可以用来检测表面的亲水性基团，并比较不同杂取代石墨烯材料中石墨烯层的曲率程度。图形抽象

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来源期刊

Adsorption 工程技术-工程：化工

CiteScore

8.10

自引率

3.00%

发文量

审稿时长

2.4 months

期刊介绍： The journal Adsorption provides authoritative information on adsorption and allied fields to scientists, engineers, and technologists throughout the world. The information takes the form of peer-reviewed articles, R&D notes, topical review papers, tutorial papers, book reviews, meeting announcements, and news. Coverage includes fundamental and practical aspects of adsorption: mathematics, thermodynamics, chemistry, and physics, as well as processes, applications, models engineering, and equipment design. Among the topics are Adsorbents: new materials, new synthesis techniques, characterization of structure and properties, and applications; Equilibria: novel theories or semi-empirical models, experimental data, and new measurement methods; Kinetics: new models, experimental data, and measurement methods. Processes: chemical, biochemical, environmental, and other applications, purification or bulk separation, fixed bed or moving bed systems, simulations, experiments, and design procedures.