Heterogeneous activation of persulfate by Mg doped Ni(OH)<sub>2</sub> for efficient degradation of phenol

Mg doped Ni(OH)2 was synthesized and investigated as an efficient material to activate persulfate (PS) for phenol degradation. The property of the Ni(OH)2 material was enhanced by Mg doping as the removal efficiency of phenol was increased from 74.82 % in Ni(OH)2/PS system to 89.53 % in Mg-doped Ni(OH)2/PS system within 20 min. Such a high removal efficiency revealed that doping Mg into Ni(OH)2 brings about more defects (oxygen vacancies), which facilitated the formation of more active species in the degradation process. The removal efficiencies of phenol increased with the increase of the initial pH from 3 to 11. The influences of Cl−, NO3− and HCO3− on the stability of the system were also studied and the results showed that removal rates of all systems in the presence of these different inorganic anions could reached about 90 % within 20 min. Based on the electron spin resonance (ESR) experiments, 1O2, O2·-, ·OH and SO4•− were identified as the active species in Mg-doped Ni(OH)2/PS system for phenol degradation and a degradation mechanism was proposed for this system. In addition, the as-prepared material retained its activation performance even after 3 repeated cycles.

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Work Title Heterogeneous activation of persulfate by Mg doped Ni(OH)<sub>2</sub> for efficient degradation of phenol
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Open Access
Creators
  1. Fang Zhu
  2. Siyi Zhou
  3. Mengying Sun
  4. Jianfeng Ma
  5. Wei Zhang
  6. Kunjie Li
  7. Hao Cheng
  8. Sridhar Komarneni
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Chemosphere
Publication Date January 1, 2022
Publisher Identifier (DOI)
  1. https://doi.org/10.1016/j.chemosphere.2021.131647
Deposited November 20, 2021

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  • Created
  • Added Revised_Manuscript_with_changes_marked.docx
  • Added Creator Fang Zhu
  • Added Creator Siyi Zhou
  • Added Creator Mengying Sun
  • Added Creator Jianfeng Ma
  • Added Creator Wei Zhang
  • Added Creator Kunjie Li
  • Added Creator Hao Cheng
  • Added Creator Sridhar Komarneni
  • Published
  • Updated
  • Updated