%0 Journal Article
%A Yexiao Yu
%A Guanping Jin
%A Yuhong Fang
%A Zheng Xu
%A Xiaoyuan Lü
%A Chunnian Chen
%T Potential-aided recovery of iodide using 2-D nanosheet CuxO coating polymer/graphene/carbon fibers composite
%D 2020
%R 10.1016/j.cjche.2019.11.010
%J Chinese Journal of Chemical Engineering
%P 1046-1054
%V 28
%N 4
%X 2-D nanosheet Cu2O doped CuO coating poly m-phenylenediamine and melamine/graphene/carbon fibers composite (CuxO/MPM/GFs) was firstly fabricated by compound electrochemical method. CuxO/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 CuxO/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 I5-. The I- could be quickly desorbed from the electrode with a transfer of CuI to Cu2O by cycle voltammetry from -1.0 to 0.5 V for 90 cycles in pH 9.0, 0.1 mol·L-1 KNO3. Thus, CuxO/MPM/GFs was renewable in the continuous electrochemical-adsorption-desorption processes.
%U https://cjche.cip.com.cn/EN/10.1016/j.cjche.2019.11.010