氧化处理方法与多壁碳纳米管表面羧基含量的关系

Carboxylic groups were produced on the surface of MWCNTs by oxidation treatment. Carboxylic group contents were quantitively analyzed by FTIR, TGA and XPS. Results show that TGA and XPS analysis give similar carboxylic group contents on the surface of MWCNTs. For 2.5mol/L nitric acid oxidation for 4h, mixed acid oxidation for 4h, and mixed acid oxidation for 4h and then 20% H2O2 oxidation for 2h, 4.80, 5.35 and 7.55mol% of carboxylic groups on the were respectively produced.