| Summary: | In this study, <i>β</i>-cyclodextrin-modified reduced graphene oxide aerogels (<i>β</i>-CD-rGOAs) were synthesized via a one-step hydrothermal method and were used to remove hexamethyldisiloxane (L2) from biogas. The <i>β</i>-CD-rGOAs were characterized by the Brunner–Emmet–Teller technique, using Fourier-transform infrared spectroscopy, Raman spectrometry, scanning electron microscopy (SEM), contact angle measurements, and X-ray diffraction. The results of the characterizations indicate that <i>β</i>-CD was grafted onto the surface of rGOAs as a cross-linking modifier. The <i>β</i>-CD-rGOA had a three-dimensional, cross-linked porous structure. The maximum breakthrough adsorption capacity of L2 on <i>β</i>-CD-rGOA at 273 K was 111.8 mg g<sup>−1</sup>. A low inlet concentration and bed temperature facilitated the adsorption of L2. Moreover, the <i>β</i>-CD-rGOA was regenerated by annealing at 80 °C, which renders this a promising material for removing L2 from biogas.
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