SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2020, Vol. 28 ›› Issue (4): 1046-1054.DOI: 10.1016/j.cjche.2019.11.010

• Separation Science and Engineering • 上一篇    下一篇

Potential-aided recovery of iodide using 2-D nanosheet CuxO coating polymer/graphene/carbon fibers composite

Yexiao Yu, Guanping Jin, Yuhong Fang, Zheng Xu, Xiaoyuan Lü, Chunnian Chen   

  1. Anhui Key Lab of Controllable Chemical Reaction & Material Chemical Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China
  • 收稿日期:2019-09-13 修回日期:2019-11-11 出版日期:2020-04-28 发布日期:2020-07-27
  • 通讯作者: Guanping Jin
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (U1407110). Anhui Province Key Research and Development Plan (JZ2018AKKG0332).

Potential-aided recovery of iodide using 2-D nanosheet CuxO coating polymer/graphene/carbon fibers composite

Yexiao Yu, Guanping Jin, Yuhong Fang, Zheng Xu, Xiaoyuan Lü, Chunnian Chen   

  1. Anhui Key Lab of Controllable Chemical Reaction & Material Chemical Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China
  • Received:2019-09-13 Revised:2019-11-11 Online:2020-04-28 Published:2020-07-27
  • Contact: Guanping Jin
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (U1407110). Anhui Province Key Research and Development Plan (JZ2018AKKG0332).

摘要: 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.

关键词: Potential-aided recovery, Iodide, Cu2O, Carbon fibers composite

Abstract: 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.

Key words: Potential-aided recovery, Iodide, Cu2O, Carbon fibers composite