Synthesis of nanoporous graphene oxide adsorbents by freeze-drying or microwave radiation: Characterization and hydrogen storage properties

Role of interlayer spacing and functional group on the hydrogen storage properties of graphene oxide and reduced graphene oxide

“…Hydrogen storage capacity 1.36 wt.% and 1.26 wt.% of GO wrapped with V 2 O 5 and TiO 2 under pressure 7 MPa at 77 K temperature respectively, was observed [22]. Nikolaos Kostoglou et al [23] have been synthesized GO by microwave exfoliation as well as chemical reduction approaches and reported the H 2 storage capacity~0.7 wt.% and~0.5 wt.% respectively at 77 K and 1 bar. Wenbo Liu et al reported the yttrium decorated boron doped graphene as a promising material for hydrogen storage [24].…”

Electrochemical hydrogen storage in Pd-coated porous silicon/graphene oxide

“…Hummer's method is known as an economic and simple way for GO synthesis [11,12]. Large scale production of few layer graphene sheets is an advantage of this method.…”

Nanoporous spongy graphene: Potential applications for hydrogen adsorption and selective gas separation

“…4 (CO 2 ) [45][46][47] and storage of highly-dense energy carriers such as methane (CH 4 ) and hydrogen (H 2 ) [32,40,42,44,45]. These nanoscale materials are considered attractive for the aforementioned applications as they combine low densities, large surface areas, tunable pore sizes and volumes, excellent thermal and chemical stability, environmental friendliness, non-toxicity and low production cost [16,49,50].…”

“…Next, 1 ml of HI (Sigma-Aldrich; 30 %) was added and the mixture was placed inside a polytetrafluoroethylene (PTFE)-lined stainless steel autoclave reactor for 12 h at 180 o C. A graphene hydrogel (GH) was subsequently collected from the reactor and was instantly submerged into deionized water for 24 h to remove any residual HI from its surface. Water was removed by 75 wt.% from the as-prepared GH through room temperature evaporation in order to obtain a final product with an enhanced surface area [37,40]. In a final step, the partially dried GH was freezed with liquid N 2 and then freeze-dried in vacuum overnight to remove the excess water.…”

“…A plethora of porous graphene-based nanostructures, including nanosheets [32][33][34], sponges [35][36][37][38][39][40] and foams [41][42][43], have been synthesized with potential to be used as advanced nanoelectronic components for energy conversion and storage devices [29,33,34,[37][38][39]43,48] and as highlyefficient adsorbents for liquid substances and gases [32,35,36,[40][41][42][44][45][46][47]. Specifically, they have been proposed as electrodes and substrates for super-capacitors [29,43], batteries [33,34,38], fuel cells [39] and solar cells [48], as well as sorption materials for water purification from oils and organic solvents [35,36,41], sequestration of unwanted greenhouse emissions such as carbon dioxide A C C E P T E D M A N U S C R I P T…”