Fe–Co-SBA assisted by visible light can effectively activate NaHSO<sub>3</sub> or H<sub>2</sub>O<sub>2</sub> for enhanced degradation of Orange Ⅱ

Two different visible light (Vis) assisted heterogeneous photocatalytic systems (BS (bisulfite)/Fe–Co-SBA (Fe–Co-Santa Barbara amorphous material)/Vis and H2O2 (hydrogen peroxide)/Fe–Co-SBA/Vis) for degrading Orange Ⅱ were investigated. The role of some significant parameters on the degradation of Orange Ⅱ in the two systems were studied separately and compared. The concentration of either BS or H2O2 led to a significant effect on the degradation of Orange Ⅱ. In addition, BS/Fe–Co-SBA/Vis system was found to be suitable for a wider pH range of 3–9. However, we found that the initial pH of solution during the reaction had a great influence on the degradation of Orange II in the H2O2/Fe–Co-SBA/Vis system. The main free radicals involved in the degradation of Orange II in the BS/Fe–Co-SBA/Vis system were ·OH and SO4·- while they were mainly ·OH radicals in the H2O2/Fe–Co-SBA/Vis system as determined by electron spin-resonance (ESR) spectroscopy. Photocatalytic dye degradation mechanisms were proposed for both the systems based on the generation of different radicals in each system.

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Work Title Fe–Co-SBA assisted by visible light can effectively activate NaHSO<sub>3</sub> or H<sub>2</sub>O<sub>2</sub> for enhanced degradation of Orange Ⅱ
Subtitle Activation of NaHSO<sub>3</sub> versus H<sub>2</sub>O<sub>2</sub>
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Open Access
Creators
  1. Qiuyue Ji
  2. Fang Zhu
  3. Yu Lei
  4. Hao Cheng
  5. Jianfeng Ma
  6. Sridhar Komarneni
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Microporous and Mesoporous Materials
Publication Date February 1, 2021
Publisher Identifier (DOI)
  1. https://doi.org/10.1016/j.micromeso.2021.110902
Deposited November 18, 2021

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  • Created
  • Added Manuscript__with_changes_clearly_indicated__.docx
  • Added Creator Qiuyue Ji
  • Added Creator Fang Zhu
  • Added Creator Yu Lei
  • Added Creator Hao Cheng
  • Added Creator Jianfeng Ma
  • Added Creator Sridhar Komarneni
  • Published
  • Updated
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