Type of carbon
Carboxylic (mmol/g)
Lactonic (mmol/g)
Phenolic (mmol/g)
Total Acidic groups (mmol/g)
Basic groups (mmol/g)
Surface pH
Point of zero charge
CNT
-
-
-
-
6.15
6.2
MCNT-HNO
3
0.078
0.0225
0.0456
0.1461
0.125
4.9
4.75
Table 1:
Boehm titration, Surface pH and point of zero charge for CNT and MCNT-HNO
3
.
