浓混酸改性碳纳米管涂层电极的电吸附脱盐研究
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摘要
采用浓H2SO4与浓HNO3(体积比1∶1)的混酸对碳纳米管进行除杂、开口和改性,用碳纳米管与PVDF(质量比8∶2)制备改性碳纳米管涂层电极,研究其脱盐效果。研究表明,经浓混酸处理后,碳纳米管的比表面积降低了5.75%,分散性更好,能够长时间、均匀地悬浮在溶液中,有利于其在电极表面均匀涂布;碳纳米管涂层电极的饱和吸附量提高了40.39%。
The surface modification has been made to the commercial carbon nanotubes with concentrated sulfuric acid and nitric acid according to the volume ratio of 1 ∶ 1. Modified carbon nanotubes coated electrodes are prepared to study the desalination effect when the mass ratio of carbon nanotubes and PVDF is 8∶ 2. The result shows that the specific surface area of carbon nanotubes,reducing by 5. 75%; that the dispersion of carbon nanotubes is better,namely,it can be suspended evenly in solution for a long time,which is favorable for its uniform coating on the surface of electrode; that the saturated adsorption capacity of carbon nanotubes coated electrode is increased 40. 39%,after modification by concentrated mixed acid.
The surface modification has been made to the commercial carbon nanotubes with concentrated sulfuric acid and nitric acid according to the volume ratio of 1 ∶ 1. Modified carbon nanotubes coated electrodes are prepared to study the desalination effect when the mass ratio of carbon nanotubes and PVDF is 8∶ 2. The result shows that the specific surface area of carbon nanotubes,reducing by 5. 75%; that the dispersion of carbon nanotubes is better,namely,it can be suspended evenly in solution for a long time,which is favorable for its uniform coating on the surface of electrode; that the saturated adsorption capacity of carbon nanotubes coated electrode is increased 40. 39%,after modification by concentrated mixed acid.
引文
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[10]将绍阶,马丹丹,盛贵尚,等.KOH改性活性炭涂层电极的电容去离子性能研究[J].工业水处理,2015,35(9):53-56.
[2]Porada S,Zhao R,Wal AVD,et al.Review on the science and technology of water desalination by capacitive deionization[J].Progress in Materials Science,2013,58(8):1388-1442.
[3]吴峰,徐斌.碳纳米管在超级电容器中的应用研究进展[J].新型炭材料,2006,21(2):176-184.
[4]程键.改性活性炭电极制备及电容脱盐性能研究[D].上海:东华大学,2015.
[5]段志伟,揭晓华,张艳梅.多壁碳纳米管的酸处理工艺研究[J].材料导报,2012,26(16):28-30.
[6]张登松,代凯,方建慧,等.碳纳米管改性处理的研究[J].化工矿物与加工,2004,33(3):14-17.
[7]方战强,杨梅,徐勇军,等.用钛基锑-锡氧化物涂层电极研究橙黄G的电化学降解第一部分——电极的制备及电化学性能[J].电镀与涂饰,2010,29(8):40-42.
[8]赵研,胡筱敏,单士亮.活性炭涂层电极电吸附除盐性能研究[J].安全与环境学报,2012,12(3):30-34.
[9]彭牛生,刘维良,刘绍洋.壁碳纳米管的表面改性与分散工艺研究[J].陶瓷学报,2011,32(1):37-40.
[10]将绍阶,马丹丹,盛贵尚,等.KOH改性活性炭涂层电极的电容去离子性能研究[J].工业水处理,2015,35(9):53-56.