. 2020 Jan 2;10(1):85. doi: 10.3390/nano10010085

Table 4.

Results obtained by simultaneous thermal analysis: differential scanning calorimetry coupled with thermogravimetry (DSC-TG) for iron oxide nanostructures (NVx) synthesized by hydrothermal process. Five heating-cooling cycles have been performed for each sample up to 800 °C.

Sample	Speed	Peak 1		Peak 2		Peak 3		Peak 4		Peak 5
Sample	°/min	T, °C	ΔH, J/g	T, °C	ΔH, J/g	T, °C	ΔH, J/g	T, °C	ΔH, J/g	T, °C	ΔH, J/g
NV4 5 cycles with 20°/min up to 800°C	10	57.04	5.96	291.44	−9.19 exo					676.29	0.30
	Δm, %	−0.476		−0.222						−0.041	−1.578
	20			258.56	−1.63 exo			516.69	−2.07 exo	678.41	0.33
	Δm, %			−0.131				−0.027		−0.044	−1.794
	30	91.38	5.86	320.72	−2.73 exo	389.34	−0.13 exo	449.94	0.39	677.92	0.30
	Δm, %	−0.59		−0.168		−0.035		-0.053		−0.036	−1.686
	50	84.29	0.27	339.48	0.28					679.23	0.38
	Δm, %	−0.167		−0.101						−0.018	−1.737
NV5 5 cycles with 30°/min up to 800 °C	10	70.79	7.10	257.45	0.72					680.94	0.26
	Δm, %	−0.395		−0.152						−6.25 × 10⁻³	−1.556
	20	92.83	5.56	299.67	−5.22 exo	380.17	−0.55 exo	466.56	−0.56 exo	678.68	0.39
	Δm, %	−0.537		−0.255		−0.057		−0.041		−0.043	−1.546
	30	106.47	21.87	273.97	−1.08 exo	370.96	−8.15 exo	512.55	−1.51 exo	679.26	0.36
	Δm, %	−0.803		−0.095		−0.32		−0.126		−0.039	−1.751
	50	121.51	17.05							680.32	0.58
	Δm, %	−0.686								−0.018	−1.501
NV6 5 cycles with 20°/min up to 800 °C	10	67.72	4.35	278.29	−7.76 exo			479.11	−6.27 exo	679.00	0.38
	Δm, %	−0.368		−0.49				−0.121		−0.028	−1.513
	20	94.50	4.73			375.16	−14.00 exo	499.98	−2.13 exo	679.23	0.74
	Δm, %	−0.402				-0.573		−0.1		−0.04	−1.963
	30	104.36	6.26	247.83	−0.93 exo	390.41	−5.13 exo			679.83	0.82
	Δm, %	−0.439		−0.156		−0.629				−0.012	−1.518
	50	122.74	19.63			411.07	−3.92 exo	557.59	−2.26 exo	678.89	1.93
	Δm, %	−0.678				−0.559		−0.032		-0.072	−1.562
NV7 5 cycles with 30°/min up to 800 °C	10	89.29	84.66	269.75	−6.93 exo					680.95	0.26
	Δm, %	−5.821		−1.604						−7.88 × 10⁻³	−9.425
	20	120.50 184.86	91.87 6.46	297.43	−5.83 exo			469.56	−1.19 exo	679.09	0.43
	Δm, %	−5.865 −0.718		−1.462				−0.178		-0.065	−10.27
	30	118.62	96.00	290.07	−4.79 exo					680.49	0.51
	Δm, %	−6.911		−1.591						-0.018	−10.39
	50	137.24	100.21	302.59	−4.44 exo					679.99	0.61
	Δm, %	−7.424		−1.744						−8.76 × 10⁻³	−10.88