Table 1.
Gelation properties of three amphiphiles-GO composites at room temperature.
Figure 1.
Photograph of organogels of BPy-GO in solvents of DMF, cyclopentanone, and THF (from left to right).
Figure 2.
SEM images of xerogels. GO sheets (a), C16Py-GO gels ((b) DMF, (c) THF, and (d) pyridine), BPy-GO gels ((e) DMF, (f) cyclopentanone, and (g) THF), and CTAB-GO gels ((h) DMF, (i) cyclopentanone, (j) cyclohexanone, (k) 1,4-dioxane, and (l) THF).
Figure 3.
Typical EDXS of xerogels originate from CTAB-GO gels in cyclopentanone.
The Cu and Au peaks originate from the substrate of copper foil and the coated gold nanoparticles.
Figure 4.
AFM images with section analysis of xerogels.
C16Py-GO gels, BPy-GO gels, and CTAB-GO gels in DMF (a, b, and c), and THF (d, e, and f). Scale bars: 10 µm.
Figure 5.
TEM images and typical EDXS (l) of xerogels.
C16Py-GO gels ((a) DMF, (b) THF, and (c) pyridine), BPy-GO gels ((d) DMF, (e) cyclopentanone, and (f) THF), and CTAB-GO gels ((g) DMF, (h) cyclopentanone, (i) cyclohexanone, (j) 1,4-dioxane, and (k) THF).Scale bars: 1 µm. The Cu peaks originate from the TEM grid.
Figure 6.
(A) GO in KBr pellet (a) and C16Py-GO gels in DMF (b), THF (c), and pyridine (d); (B) GO (a) and BPy-GO gels in DMF (b), cyclopentanone (c), and THF (d); (C) GO (a) and CTAB-GO gels in DMF (b), cyclopentanone (c), cyclohexanone (d), 1,4-dioxane (e), and THF (f).
Figure 7.
(A) GO sheets; (B) C16Py-GO gels in DMF (a), THF (b), and pyridine (c); (C) BPy-GO gels in DMF (a), cyclopentanone (b), and THF (c); (D) CTAB-GO gels in DMF (a), cyclopentanone (b), cyclohexanone (c), 1,4-dioxane (d), and THF (e).
Figure 8.
(A) GO sheet and C16Py-GO gels in DMF, THF, and pyridine; (B) GO sheet and BPy-GO gels in DMF, cyclopentanone, and THF; (C) GO sheet and CTAB-GO gels in DMF, cyclopentanone, cyclohexanone, 1,4-dioxane, and THF.
Table 2.
TGA data of GO sheet and amphiphiles-GO xerogels.
Figure 9.
Scheme of different assembly modes in cationic amphiphiles-graphene oxide gels.
CTAB-GO (a), C16Py-GO (b), and BPy-GO (c).