Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China.
School of Resources and Environment, University of Jinan, Jinan, 250022, PR China.
Sci Rep. 2017 Jun 15;7(1):3611. 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 for MB, 840.3 mg g for MG and 970.9 mg g 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 (ΔG < 0, ΔH < 0, ΔS < 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 π-π 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.
本文成功制备了水溶性超支化多胺功能化多壁碳纳米管纳米复合材料（WHPA-OMCNT），并将其应用于水的修复。通过傅里叶变换红外光谱（FTIR）、热重分析（TGA）、动电位、扫描电子显微镜（SEM）和透射电子显微镜（TEM）分析对 WHPA-OMCNT 进行了表征。WHPA-OMCNT 对有机染料如亚甲基蓝（MB）、孔雀石绿（MG）和甲基紫（MV）的去除表现出优异的吸附性能。在最佳条件下，MB 的平衡吸附容量为 800.0 mg g，MG 的平衡吸附容量为 840.3 mg g，MV 的平衡吸附容量为 970.9 mg g。准二级方程和 Langmuir 模型分别与所有三种污染物的吸附动力学和等温线数据具有良好的相关性。热力学结果（ΔG < 0、ΔH < 0、ΔS < 0）表明，MB、MG 和 MV 的吸附过程是可行的、放热的和自发的。提出了一种可能的吸附机制，其中氢键、静电吸引和π-π堆积相互作用主导了有机染料的吸附。此外，优异的重现性使 WHPA-OMCNT 具有在水处理中应用的潜力。
