Table 2 Element content of the ACs acquired from XPS.

From: Engineering nitrogen and oxygen functionalities in naturally sourced activated carbon for multicomponent gas adsorption

Sample

C (at%)a

N (at%)a

O (at%)a

N (wt%)b

AC

87. 22

1. 44

10. 39

–

NAC-600

84. 94

7. 68

6. 89

8.64

NAC-750

84. 64

5. 55

8. 92

6.24

NAC-900

85. 14

3. 13

10. 09

3.52

  1. aMeasure by XPS; bmeasured by combustion coupled with TCD detector.
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