Oxidation behavior of multiwall carbon nanotubes with different diameters and morphology

Comparative temporal analysis of multiwalled carbon nanotube oxidation reactions: Evaluating chemical modifications on true nanotube surface

“…This classical chemical route has been broadly used especially to overcome limitations in dispersibility and processability, which are major hindrances in the investigation of their unique properties in applications such as high performance composites and biomedical applications (vaccine development, cancer diagnosis, prevention and treatment, tissue engineering, biosensors, among others). Different oxidation protocols are pointed out in the literature with oxidizers such as HNO 3 , HNO 3 /H 2 SO 4 (mélange solution), H 2 SO 4 /H 2 O 2 (piranha solution), KMnO 4 , H 2 O 2 and Fenton reagent [1][2][3][4][5]. Each method produces materials with different characteristics, varying from the nature and concentration of surface oxygenated groups to their dimensions and structural quality [3,5,6].…”

“…Different oxidation protocols are pointed out in the literature with oxidizers such as HNO 3 , HNO 3 /H 2 SO 4 (mélange solution), H 2 SO 4 /H 2 O 2 (piranha solution), KMnO 4 , H 2 O 2 and Fenton reagent [1][2][3][4][5]. Each method produces materials with different characteristics, varying from the nature and concentration of surface oxygenated groups to their dimensions and structural quality [3,5,6]. Control over these properties is desirable to enhance derivatization yields, improve interactions with matrices and is central for applications in fields such as electronics and biomedicine.…”

Aldose to ketose interconversion: galactose and arabinose isomerization over heterogeneous catalysts

“…31 Mg-containing samples were prepared by impregnation of functionalized MWNTs with the aqueous solutions of magnesium nitrate (MgIJNO 3 ) 2 ·6H 2 O, 98%, Vekton). 32 After impregnation for 6 h the samples were dried at 110°C for 4 hours followed by calcination at 350°C for 4 hours under argon.…”

Properties of MWNT-Containing Polymer Composite Materials Depending on Their Structure

“…oxidation) can modify surface composition of the materials, making it hydrophilic. According to our previous study [ 69 ], as-prepared CNTs have ca. 0.3-0.5 oxygen-containing groups per nm 2 , so their surface is mostly hydrophobic, but still can show several hydrophilic behavior.…”