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

• Published in: Scientific reports 2017-06, Vol.7 (1), p.3611-13, Article 3611
• Main Authors: Hu, Lihua, Yang, Zhongping, Wang, Yaoguang, Li, Yan, Fan, Dawei, Wu, Di, Wei, Qin, Du, Bin
• Format: Article
• Language: English
• Subjects: 140/131; 639/301/357/73; 704/172/169/896; Adsorption; Color removal; Data processing; Dyes; Fourier analysis; Fourier transforms; Humanities and Social Sciences; Infrared spectroscopy; Methylene blue; multidisciplinary; Nanotechnology; Nanotubes; Pollutants; Polyamines; Scanning electron microscopy; Science; Science (multidisciplinary); Water treatment; Zeta potential
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/s41598-017-03490-6

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 (Δ G