CNT/PANI电极吸附去除水中Cu^(2+)的研究

Electrosorption of Cu2+ in aqueous solution using CNT/PANI electrodes

通过原位化学聚合法制备CNT/PANI复合材料,采用电镜扫描(SEM)、傅里叶红外光谱技术(FTIR)、X射线光电子能谱技术(XPS)和循环伏安法(CV)对复合材料的物理化学特性进行表征和测试.结果表明,复合材料比表面积和孔隙率减少,但比电容增加.CNT/PANI复合材料电极对铜离子的去除效果是CNT电极的4.24倍,吸附量随着电压、铜离子初始浓度和p H的增加而增加,电吸附过程符合准一级动力学.

Polyaniline and carbon nanotube composites(CNT/PANI)were synthesized through in situ chemical oxidativepolymerization method,the physicochemical properties of the composites were characterized by scanning electronmicroscopy(SEM),Fourier transform infrared spectroscopy(FTIR),X-ray photoelectron spectroscopy(XPS),and cyclicvoltammetry(CV).Compared with the pure CNT,CNT covered by PANI had a smaller specific surface area and porosity,but had a higher specific capacitance.Experiments indicated that the removal efficiency of Cu2+by CNT/PANI electrodewas4.24times that by CNT electrode.The adsorbed amount of Cu2+increased with the increase of the voltage,initialCu2+concentration and solution pH.The electrosorption of CNT/PANI electrodes for Cu2+followed the pseudo-first-orderkinetic model.