2-D nanosheet Cu

2

O doped CuO coating poly m-phenylenediamine and melamine/graphene/carbon fibers composite (Cu

x

O/MPM/GFs) was firstly fabricated by compound electrochemical method. Cu

x

O/MPM/GFs was successfully used to the recovery of iodide (I-) from salt water by lower potential-aided sorption and desorption processes. The potential-aided recovery of I

-

at Cu

x

O/MPM/GFs was characterized by FE-SEM

XRD

IR

Raman

XPS

UV-vis and electrochemical techniques in detail. The maximal adsorption capacity of 86.82 mg·g

-1

could be obtained with a pseudo-second-order model at 0.8 V for 210 min in pH 5.0

0.1 mol·L

-1

NaCl

and the process accompanied the generation of CuI

CuO and I

5-

. The I

-

could be quickly desorbed from the electrode with a transfer of CuI to Cu

2

O by cycle voltammetry from -1.0 to 0.5 V for 90 cycles in pH 9.0

0.1 mol·L

-1

KNO

3

. Thus

Cu

x

O/MPM/GFs was renewable in the continuous electrochemical-adsorption-desorption processes.