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Table. 1.

Relative contents (%) of oxygen-containing functional groups obtained from C1s spectra curve fitting.

Sample Graphitized carbon (284.6 eV) Hydroxyl groups (286.0 eV) Carbonyl groups (287.3 eV) Carboxyl groups (288.9 eV)
Non-treated 79.66 11.01 6.99 2.35
HNO3 treated 69.95 15.29 7.73 7.03
New Phys.: Sae Mulli 2023;73:429~436 https://doi.org/10.3938/NPSM.73.429
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