Exploring the insertion of ethylenediamine and bis(3-aminopropyl)amine into graphite oxide

Figures & data

Table 1. Elemental analysis.

Sample	%C	%O	%N
GO	66.81	32.03	0.02
GOE	78.08	15.83	5.09
GOT	77.09	13.86	7.52
GOE-t	69.62	17.51	10.12
GOT-t	68.51	25.91	3.74
GOT-t-96	64.58	25.86	6.68

Figure 1. XRD patterns for (a) natural graphite, (b) GO (c) GOE, (d) GOT, (e) GOE-t, (f) GOT-t and (g) GOT-t-96.

Figure 2. Thermograms in He for the amine-modified samples (A) prepared in ethanol (a) GO, (b) GOE and (c) GOT, and (B) prepared in toluene, (a) GO, (b) GOE-t, (c) GOT-t and (d) GOT-t-96.

Figure 3. TPD profiles for amine-modified samples prepared in ethanol (a) GO, (b) GOE and (c) GOT.

Figure 4. TPD profiles for amine-modified samples prepared in toluene (a) GO, (b) GOE-t, (c) GOT-t and (d) GOT-t-96.

Figure 5. DRIFT spectra for amine-modified samples (a) GO, (b) GOE, (c) GOT, (d) GOE-t, (e) GOT-t and (f) GOT-t-96.

Table 2. XPS results.

		Atomic ratio			Relative peak area O 1s (%)
Sample		O/C	N/C	N1/N2	Peak A	Peak B	Peak C	Peak D
GO	0.16	0.22	–	–	17	47	25	11
GOE	0.90	0.20	0.04	3.8	24	62	12	2
GOT	0.75	0.18	0.06	3.0	21	63	15	1
GOE-t	0.38	0.14	0.11	1.2	28	64	8	–
GOT-t	0.41	0.13	0.09	1.1	33	56	10	–
GOT-t-96	0.49	0.15	0.27	1.1	66	28	6	–

Scheme 1. Representation of possible conformations for intercalated mono- and bifunctional molecules on graphite oxide: a) monolayer, b) bilayer, c) tail, d) bridge e) loop. •: functional group