Spongy Graphene as a Highly Efficient and Recyclable Sorbent for Oils and Organic Solvents

Abstract

In this work, spongy graphene (SG), a shape-mouldable and nanoporous kinds of sorbent also increases, and the material with a high specific surface area used as a versatile and recyclable environmental and ecological risk of these sorbent material, is proposed and studied. SG shows highly effi cient absorp-polymers in application remains unclear.As an alternative to polymer, expanded tion of not only petroleum products and fats, but also toxic solvents such graphite (EG) has also been used to as toluene and chloroform (up to 86 times of its own weight), requiring no remove oil. Applying EG as an oil sorbent further pretreatment, which is tens of times higher than that of conventional was first done by Toyoda and Inagaki. [12,13] absorbers. Moreover, SG can be regenerated ( >10 times) by heat treatment, EG is a good absorber for crude oil and yielding the full release of adsorbates (>99%). The present work suggests SG

Superhydrophobic Activated Carbon‐Coated Sponges for Separation and Absorption

“…Similar observations were also made in other systems including superhydrophobic absorbents for the selective absorption of oils or organics from water, such as superwetting nanowire membranes, [13] carbon nanotube sponges, [3] nanoporous polydivinylbenzene, [14] and spongy graphene. [15] To investigate the effect of PDMS deposition on the chemical composition of the surface of PDMS-treated AK 1 , X-ray photoelectron spectroscopy (XPS) measurements were also performed. Remarkably, the peak at 104.70 eV, which is attributed to Si 2p, was observed [31] and corresponded to 8.31 at % silicon ( Figure 4).…”

“…Specifically, the as-treated sponge had an absorbency of 1.38 ton m À3 for chloroform and 1.54 ton m À3 for phenixin. In addition, relative to superhydrophobic absorbents, [3,[13][14][15] the as-treated sponge was much easier to prepare and handle for practical use. Having the advantage of low cost, simple preparatory process, good recyclability, high absorbency, and selectivity, this superhydrophobic AK 1 -coated sponge may have great potential for the removal of oils and toxic organic contaminants from water.…”

“…Recently, several types of porous materials with excellent surface superhydrophobicity and superoleophilicity have been reported and successfully used for the separation and absorption of organics or oils from water. [8][9][10] The first case for oil/water separation using a superhydrophobic and superoleophilic coating mesh film was reported by Jiang et al [11] Subsequently, superhydrophobic zinc oxide-coated mesh films, [12] superwetting nanowire membranes, [13] superhydrophobic nanoporous polydivinylbenzene, [14] conjugated microporous polymers, (CMPs) [8] and spongy graphene [15] were developed. Owing to their excellent surface wettability, these superwetting materials showed good absorption performance and selectivity for the removal of organics and oils from water.…”

Preparation of graphene-MoS2 hybrid aerogels as multifunctional sorbents for water remediation

“…Preparation of GO GO was produced according to the Hummers method [24]. Typically, 4 g of graphite powders, 2 g of sodium nitrate and 92 mL of sulfuric acid (98 wt.%) were added into a 500-mL flask and mixed together.…”

Biomimetic superelastic graphene-based cellular monoliths

“…A number of methods, such as self-gelation and chemical vapour deposition (CVD) over a porous catalyst have recently been developed to fabricate highly porous graphene cellular monoliths [5][6][7][8][9][10][11][12] . However, as with most of the existing porous carbon materials 13 , the resulting graphene monoliths are generally brittle and have small recoverable deformation before failure unless they are infiltrated with an elastomeric polymer 5 or grown on pre-formed carbon nanotube aerogels 14 .…”