Regeneration of carbon nanotube and nanofibre composite film electrode for electrical removal of cupric ions.
Low cost and large scale carbon nanotube and nanofibre (CNT-CNF) composite films have been fabricated and employed as electrodes for electrosorption of cupric ions. The regeneration of the saturated CNT-CNF film electrode has been investigated. Three methods (short-circuiting, short-circuiting and then reversing voltage, reversing voltage and then short-circuiting) are used for regeneration. The results show that low regeneration efficiency of CNT-CNF film electrode due to electrodeposition of Cu on the electrode surface can be highly improved by regeneration applying reverse voltage combined with short circuit. 93% regeneration efficiency can be achieved when 0.8 V reverse voltage is applied before short-circuiting during regeneration of CNT-CNF film electrode.
Zhan
Yankun
Y
Department of Physics, East China Normal University, Shanghai 200062, People's Republic of China.
Li
Haibo
H
Pan
Likun
L
Zhang
Yanping
Y
Chen
Yiwei
Y
Sun
Zhuo
Z
D003300:Copper / Q000737:chemistry*; D004566:Electrodes; D008567:Membranes, Artificial; D008855:Microscopy, Electron, Scanning; D057139:Nanofibers / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D014867:Water / Q000737:chemistry*; D018508:Water Purification / Q000295:instrumentation* / Q000379:methods
D008567:Membranes, Artificial; D037742:Nanotubes, Carbon; D014867:Water; D003300:Copper