Facile preparation of water-soluble hyperbranched polyamine functionalized multiwalled carbon nanotubes for high-efficiency organic dye removal from aqueous solution

作者：Hu, Lihua; Yang, Zhongping; Wang, Yaoguang; Li, Yan; Fan, Dawei; Wu, Di; Wei, Qin; Du, Bin^*

来源：Scientific Reports, 2017, 7(1): 3611.

DOI：10.1038/s41598-017-03490-6

• METHYLENE-BLUE
• ADSORPTION
• NANOCOMPOSITE
• NANOSTRUCTURE
• SORPTION
• SILICA
• VIOLET
• ORANGE

Water-soluble hyperbranched polyamine functionalized multiwalled carbon nanotubes nanocomposite (WHPA-OMCNT) was successfully prepared and applied to water remediation in this paper. WHPA-OMCNT was characterized by Fourier transform infrared spectroscopy ( FTIR), thermogravimetric analysis (TGA), zeta potential, scanning electron microscopy (SEM) and transmission electron microscope (TEM) analyses. WHPA-OMCNT exhibited excellent adsorption performance for removal of organic dyes e.g., methylene blue (MB), malachite green (MG) and methyl violet (MV). The equilibrium adsorption capacity was 800.0 mg g(-1) for MB, 840.3 mg g(-1) for MG and 970.9 mg g(-1) for MV under the optimal conditions. The pseudo-second order equation and the Langmuir model exhibited good correlation with the adsorption kinetic and isotherm data for all three pollutants, respectively. The thermodynamic results (Delta G < 0, Delta H < 0, Delta S < 0) implied that the adsorption process of MB, MG and MV was feasible, exothermic and spontaneous in nature. A possible adsorption mechanism has been proposed, where H-bonding, electrostatic attraction and p-p stacking interactions dominated the adsorption of the organic dyes. In addition, the excellent reproducibility endowed WHPA-OMCNT with the potential for application in water treatment.

• 出版日期2017-6-15
• 单位济南大学; 山东大学