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Issue 27, 2017
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Adsorption on graphene: flat to edge to end transitions of phenyl hydroquinone

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Abstract

The adsorption of phenyl hydroquinone (PHQ) on graphene surfaces at the liquid–solid interface is investigated revealing a flat orientation and two different vertically adsorbed states of PHQ on graphene nanoplatelets (GNPs), namely edgewise or endwise adsorption. The transition between these states is driven by increasing concentrations of PHQ in solution leading to increased absolute coverages on the graphene surface. At low adsorbate concentrations (≤21 mM), the adsorption process is also shown to be Langmuirian with an adsorption constant of (9.5 ± 0.2) mM−1. Independent measurements are conducted using a single particle electrochemical technique to confirm the surface coverage of PHQ on GNPs at low concentrations, showing excellent agreement with the UV-Vis studies.

Graphical abstract: Adsorption on graphene: flat to edge to end transitions of phenyl hydroquinone

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Publication details

The article was received on 16 May 2017, accepted on 22 Jun 2017 and first published on 22 Jun 2017


Article type: Communication
DOI: 10.1039/C7CP03261G
Citation: Phys. Chem. Chem. Phys., 2017,19, 17521-17525
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    Adsorption on graphene: flat to edge to end transitions of phenyl hydroquinone

    L. Chen, E. E. L. Tanner and R. G. Compton, Phys. Chem. Chem. Phys., 2017, 19, 17521
    DOI: 10.1039/C7CP03261G

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