Modification of carbon nanotubes with sodium p-aminobenzenesulfonate and its effect on Cu2+ adsorption

作者：Zheng Jing-zhi^*; Hu Jian; Du Fei-peng

来源：New Carbon Materials, 2013, 28(1): 14-19.

• Carbon nanotubes
• Sodium p-aminobenzenesulfonate
• Chemical modification
• Cu2+
• Absorption capabilities

Multiwalled carbon nanotubes (MWCNTs) were oxidized by concentrate HNO3 and then reacted with SOCl2 to form MWCNT-COCl. Water-soluble sodium p-aminobenzenesulfonate-grafted multiwalled carbon nanotubes (MWCNT-CO-NHC6H5SO3Na) were synthesized by an amidation reaction of sodium p-aminobenzenesulfonate with MWCNT-COCl, which was verified by FT-IR spectroscopy. The content of the sodium p-aminobenzenesulfonate grafted onto the MWCNT surface reached 29. 9 mass%. The MWCNT-CO-NHC6H5SO3Na showed a good solubility and dispersion in water, and had an improved adsorptive performance for the removal of low concentrations of Cu2+ in water. The adsorption isotherms of the MWCNT-CO-NHC6H5SO3Na for Cu2+ can be well fitted by the Freundlich equation.

• 出版日期2013-2
• 单位武汉工程大学