“…Phenol Quinone Anhydride Lactone Carboxylic Thiol Sulfonic AC 320 820 80 20 220 60 40 ACSA1 380 820 100 40 260 400 40 ACSA2 440 820 120 40 260 520 80 ACSA3 500 940 120 20 240 540 140 ACSA4 380 740 100 20 260 340 100 ACSA5 500 840 120 40 220 380 100 ACSA6 740 1100 160 60 420 [ [26][27][28][29]. Accordingly, XPS of S 2p core level were recorded for samples AC, ACSA3 and ACSA6 in order to confirm the presence of thiol and sulfonic acid groups on the carbon samples, as evidenced by TPD analysis.…”