Glucose/Graphene-Based Aerogels for Gas Adsorption and Electric Double Layer Capacitors

In this study, three-dimensional glucose/graphene-based aerogels (G/GAs) were synthesized using the hydrothermal reduction and CO(2) activation method. Graphene oxide (GO) was used as a matrix, and glucose was used as a binder for the orientation of the GO morphology in an aqueous media. We determined that G/GAs exhibited narrow mesopore size distribution, a high surface area (763 m(2) g(−1)), and hierarchical macroporous and mesoporous structures. These features contributed to G/GAs being promising adsorbents for the removal of CO(2) (76.5 mg g(−1) at 298 K), CH(4) (16.8 mg g(−1) at 298 K), and H(2) (12.1 mg g(−1) at 77 K). G/GAs presented excellent electrochemical performance, featuring a high specific capacitance of 305.5 F g(−1) at 1 A g(−1), and good cyclic stability of 98.5% retention after 10,000 consecutive charge-discharge cycles at 10 A g(−1). This study provided an efficient approach for preparing graphene aerogels exhibiting hierarchical porosity for gas adsorption and supercapacitors.