Table 3. Ratios of the D and G Band Intensities of the Pure and Iron Oxide-Loaded Samples as a Function of the Pyrolysis Temperature Determined by Raman Spectroscopy.

sample	I(D)/I(G) [-]	sample	I(D)/I(G) [-]
HTC-0	0.54	FeHTC-0	0.47
HTC-200	0.62	FeHTC-200	0.48
HTC-300	0.69	FeHTC-300	0.51
HTC-400	0.53	FeHTC-400	0.56
HTC-500	0.68	FeHTC-500	0.60
HTC-600	0.92	FeHTC-600	0.64
HTC-700	0.98	FeHTC-700	a
HTC-800	1.01	FeHTC-800	a

^aThe calculation of the I(D)/I(G) ratios for FeHTC-700 and FeHTC-800 was omitted due to the low intensities of the corresponding Raman spectra.