Superhydrophobic and superoleophilic graphene aerogel prepared by

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S4 Absorption Capacity as a function of the density of solvents. ... of the solvents according to the density: hexane, dodecane, cyclohexane, acetone, ethanol,.
Electronic Supplementary Material (ESI) for Journal of Materials Chemistry A. This journal is © The Royal Society of Chemistry 2015

Electronic Supplementary Information (ESI)

Superhydrophobic and superoleophilic graphene aerogel prepared by facile chemical reduction Liming Xu, Guyu Xiao*, Caibao Chen, Run Li, Yiyong Mai, Guoming Sun and Deyue Yan School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P.R. China

Fig. S1 Video snapshots of the absorption process of a drop of hexadecane on the surface of GA 0s

0.04 s

0.12 s

0.16 s

0.08 s

Fig. S2 Optical image of GA immersed in water by an external force.

                                                             * Corresponding author. Tel: +86 21 54742664, E-mail address: [email protected] (G. Xiao)  

1

intensity (a.u.)

Fig. S3 Raman spectra of GO (a) and GA (b).

(b)

(a)

1000

1200

1400

1600

1800

Raman shift (cm ) -1

2000

2200

Fig. S4 Absorption Capacity as a function of the density of solvents.

Absorption Capacity (g/g)

(Order of the solvents according to the density: hexane, dodecane, cyclohexane, acetone, ethanol, methanol, kerosene, paraffin oil, toluene, pump oil, THF, dioxane, chloroform, CCl4)

240

200

160

120

0.6

 

0.8

1.0

1.2

1.4

Density of solvents (g/mL)

1.6

2

Fig. S5 FT-IR spectra of three kinds of the recovered solvents from GA: a) acetone, b) dodecane, c) hexane.

Intensity (a.u.)

(a)

(b)

(c)

4000

 

3000

2000

Wave number (cm-1)

1000

3