Impact on CO₂ Uptake of MWCNT after Acid Treatment Study

Table 2

Literature review about oxidation of carbon nanotubes.

Reference	Material	Oxidizing agent	Concentration or ratio	Time of the oxidation [h]	Temperature of the oxidation [K]	SSA [m^2/g]
This research	MWCNT	Pristine	—	—	—	240
		HNO3	Concentrated	6	373	265
		HNO3/H2SO4	1 : 3	6	373	233
[21]	MWCNT	Pristine	—	—	—	162
		HNO3	Concentrated	1	413	225
				2	413	237
				6	413	243
				10	413	195
[22]	MWCNT	Pristine	—	—	—	109
		HNO3/H2SO4	1 : 3	12	353	127
[23]	SWCNT	Pristine	—	—	—	236
		HNO3	3M	45	Not listed	2
[24]	Carbon nanofibers	Pristine	—	—	—	137
		HNO3	Concentrated	0.5	Boiling point	156
				2	Boiling point	186
		HNO3/H2SO4	1 : 1	0.5	Boiling point	183
			1 : 3	0.5	Boiling point	194
[25]	MWCNT	Pristine	—	—	—	120
		HNO3/H2SO4	1 : 3	1.5	363	116
[26]	MWCNT	Pristine	—	—	—	109
		HNO3/H2SO4	0.6	24	Not listed	179