• Journal of Inorganic Materials
  • Vol. 36, Issue 3, 292 (2021)
Yanyan YANG1、2, Yongguo LI3, Xiaowen ZHU1, Xiao DU2, Xuli MA2, and Xiaogang HAO2、*
Author Affiliations
  • 11. School of Chemistry and Environmental Science, Shangrao Normal University, Shangrao 334001, China
  • 22. Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China
  • 33. China Institute for Radiation Protection, Taiyuan 030006, China
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    DOI: 10.15541/jim20200340 Cite this Article
    Yanyan YANG, Yongguo LI, Xiaowen ZHU, Xiao DU, Xuli MA, Xiaogang HAO. Potential Induced Reversible Removal/Recovery of Phosphate Anions with High Selectivity Using an Electroactive NiCo-layered Double Oxide Film[J]. Journal of Inorganic Materials, 2021, 36(3): 292 Copy Citation Text show less

    Abstract

    Phosphorus is an essential nutrient for organisms growth and a major cause of eutrophication in water bodies. Thus, it is crucial for both of the removal and recovery of phosphate from wastewater. In this work, the NiCo-layered double oxide (NiCo-LDO) was successfully fabricated on carbon cloth conductive substrate via the in-situ calcination of the NiCo-layered double hydroxide (NiCo-LDH) and served as the electrochemically switched ion exchange (ESIX) film electrode for the removal and recovery of PO43-. The performance of NiCo-LDO for PO43- removal by ESIX and ion exchange (IX) was compared, while the selectivity and stability of NiCo-LDO for PO43- removal were also investigated. The results revealed that, in (10.00±0.05) mg/L PO43- solution, the ion exchange quantity of the NiCo-LDO for PO43- removal by ESIX process was about twice over that by IX. Moreover, compared with Cl -, NO3-, SO42- and I -, the NiCo-LDO exhibited much higher selectivity towards PO43-. In addition, the ion exchange quantity still retained 92% of its initial value after 5 uptake and release cycles. Coupled with XPS analysis, it was found that ESIX process of NiCo-LDO film electrode for PO43- removal and recovery mainly consisted of 3 steps, which were an irreversible “memory effect” structure recovery process, the redox reaction of metal ion in lamellar and the ligand exchange between PO43- and O-H groups.
    Yanyan YANG, Yongguo LI, Xiaowen ZHU, Xiao DU, Xuli MA, Xiaogang HAO. Potential Induced Reversible Removal/Recovery of Phosphate Anions with High Selectivity Using an Electroactive NiCo-layered Double Oxide Film[J]. Journal of Inorganic Materials, 2021, 36(3): 292
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