ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Evaluation of different organic solvents adsorption by porous ammonium-treated graphene and graphene oxide sponges

Somayeh Mohamadi, Arastoo Naderian, and Behnam Nazari

Research Center of Environment and Sustainable Development, Tehran, Iran

E-mail: smohamadi@khayam.ut.ac.ir

Received: 23 May 2021  Accepted: 28 December 2021

Abstract:

The present study used different hydrothermal times to obtain 3D porous ammonium treated graphene network with different pore structures and surface characteristics. In addition, their structures, properties, and influence on the adsorption performance of the obtained sponges were characterized by using x-ray diffraction, scanning electron microscopy, Non-contact atomic force microscopy, the measurement of contact angles, Brunauer–Emmett–Teller surface area, Fourier-transform infrared spectroscopy, and thermal gravimetric analysis. Three organic solvents with different physicochemical properties were selected as well. The analysis of the obtained experimental data demonstrated that the pore properties of the sponges greatly influenced the adsorption capability. In addition, the adsorption capacity of graphene oxide sponges, assembled by graphene oxide sheets and the remaining oxygenated functional groups, was weaker compared to the sponges with hydrothermal annealing. Finally, the graphene sponge annealed for 24 h at 150 °C could absorb more than 200 times its weight.

Keywords: Graphene oxide; Graphene sponge; Thermal annealing; Pore surface properties; Surface area; Adsorption; Organic solvents

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-021-02050-7

Chemical Papers 76 (4) 2537–2548 (2022)