Synthesis of novel porous graphene nanocomposite and its use as electrode and absorbent

Abstract

A novel three-dimensional nanostructured porous graphene nanocomposite was synthesized by sol-gel polymerization of hydroquinol (H) and formaldehyde (F) with sodium carbonate as a catalyst in graphene oxide (GO) suspension, followed by carbonization of HF and thermal reduction of GO to graphene at high temperature. The resulting material shows a BET surface area of 427 m 2 g À1 and a total volume of 1.2764 cm 3 g À1 with abundant mesopores. The porous graphene nanocomposite (HFG) can be used as anode for lithium ion batteries due to the porosity and thermal stability. Also, with the strong surface hydrophobicity, high mesopore ratio and pore volume, the HFG shows good absorption capacity for various organics, which makes the HFG a candidate for removal of organic contaminants from water. ExperimentalPreparation of HF-GO composite GO was prepared via a modied Hummers' method as literature and our previous work. 37-40 The HF-GO composite was prepared using sol-gel method.

Reduced graphene oxide-coated cottons for selective absorption of organic solvents and oils from water

“…28 An increase in the D/G ratio from 0.93 for GO to 1.16 for RGO was observed in the Raman spectra. This change suggests the transformation of the structure of GO with defects upon reduction and the formation of RGO, [29][30][31] which is good agreement with other work. [32][33][34] To measure the thickness of the RGO sheets, a typical AFM image of RGO nanosheets on freshly cleaved mica is shown in Fig.…”

Stöber-like method to synthesize ultralight, porous, stretchable Fe2O3/graphene aerogels for excellent performance in photo-Fenton reaction and electrochemical capacitors

“…As an ideal support, 3D-graphene or graphene aerogels (GAs) have a special 3D network structure and excellent conductivity, [22][23][24][25][26][27][28][29] which can provide a protective barrier and an efficient charge transport to avoid the occurrence of side reactions. [30][31][32][33][34] The hybrid of Fe 2 O 3 /GAs has application prospects in the development of functional materials in the photo-Fenton reaction. Hence, if we can achieve highly dispersed nanosized Fe 2 O 3 in situ growth on the GAs, the prepared Fe 2 O 3 /GAs will have the potential to overcome the above mentioned problems in the photo-Fenton reaction.…”

Efficient Capture and Reversible Storage of Radioactive Iodine by Porous Graphene with High Uptake

“…The synthesis schematic was illustrated in Figure S1. In a typical X‐ray diffraction (XRD) pattern (Figure a), the precursor GO shows a strong diffraction (001) peak at 2θ=11.6° . However, this peak almost disappeared and a new broad peak appeared at 2θ=25° for graphene, which was indexed to (002) plane and indicated that the graphene possess lower graphitized degree due to the formation of defects during the process of chemical reduction .…”