Synthesis and characterization of a plasma carbon aerosol coated sponge for recyclable and efficient separation and adsorption

Abstract

Hydrogen and carbon aerosol are co-generated by rotating gliding arc (RGA) plasma in CH4 direct conversion. The nanostructure carbon aerosol was firstly incorporated with the commercial sponge to fabricate the high selective and hydrophobic adsorption sponge.

A Review on Membrane Technology and Chemical Surface Modification for the Oily Wastewater Treatment

“…However, in each recycling, the adsorption capacity decreased drastically. Similar results have been reported in [42][43][44]. Even though the adsorption method has been widely used in the treatment of oily wastewater, the adsorbents have to replace after a relatively short period of operation or need to be removed.…”

Enhanced covalent p-phenylenediamine crosslinked graphene oxide membranes: Towards superior contaminant removal from wastewaters and improved membrane reusability

“…Relatively, the crosslinked membranes have lower hydrophilicity compared to the uncrosslinked ones. This is due to the hydrophobic nature of the PPD crosslinker [55,56]. For the crosslinked membranes, the water contact angle increased from 53.2° to 59.7° with an increase in the number of bi-layers (Figure 8) owing to bigger accumulation of the hydrophobic crosslinker.…”

Lotus-Like Water Repellency of Gas-Phase-Synthesized Graphene

“…10,11 The nonwettability of GSG is remarkable because graphene produced by other methods that exhibit morphologies or Raman spectra that are similar to GSG are not inherently superhydrophobic. For example, "carbon aerosols" that are produced through a different plasma-based process 25 resemble GSG but can only achieve a maximum contact angle of 141.0°. The intensity ratio of the 2D and G peaks in the Raman spectra of "carbon aerosols" was reported to be below unity (I 2D /I G ∼ 0.7), 25 which shows that "carbon aerosols" consist of multilayer graphene and graphite.…”

“…Three prominent peaks are present in the Raman spectrum of GSG (Figure b): a D peak at ∼1340 cm –1 , a G peak at ∼1570 cm –1 , and a single sharp 2D peak at ∼2680 cm –1 that is characteristic of graphene. , The intensity ratio of the 2D and G peaks ( I 2D / I G ) is ∼1.0 and the intensity ratio of the G and D peaks ( I G / I D ) is ∼2.9, which shows that the GSG powder used in this study consisted of high-quality single-layer, bilayer, and few-layer graphene sheets. , The nonwettability of GSG is remarkable because graphene produced by other methods that exhibit morphologies or Raman spectra that are similar to GSG are not inherently superhydrophobic. For example, “carbon aerosols” that are produced through a different plasma-based process resemble GSG but can only achieve a maximum contact angle of 141.0°. The intensity ratio of the 2D and G peaks in the Raman spectra of “carbon aerosols” was reported to be below unity ( I 2D / I G ∼ 0.7), which shows that “carbon aerosols” consist of multilayer graphene and graphite. , Relative to “carbon aerosols”, the Raman spectrum of GSG has a higher I 2D / I G , which suggests that GSG sheets are thinner than “carbon aerosols” .…”

“…For example, “carbon aerosols” that are produced through a different plasma-based process resemble GSG but can only achieve a maximum contact angle of 141.0°. The intensity ratio of the 2D and G peaks in the Raman spectra of “carbon aerosols” was reported to be below unity ( I 2D / I G ∼ 0.7), which shows that “carbon aerosols” consist of multilayer graphene and graphite. , Relative to “carbon aerosols”, the Raman spectrum of GSG has a higher I 2D / I G , which suggests that GSG sheets are thinner than “carbon aerosols” . Increasing the number of layers in a graphene sheet has been shown to decrease the contact angle of water droplets on the nanomaterial. , However, the thinness of GSG may not be the only factor contributing to its propensity to repel water.…”