TY - JOUR
T1 - Fe–Co-SBA assisted by visible light can effectively activate NaHSO3 or H2O2 for enhanced degradation of Orange Ⅱ
T2 - Activation of NaHSO3 versus H2O2
AU - Ji, Qiuyue
AU - Zhu, Fang
AU - Lei, Yu
AU - Cheng, Hao
AU - Ma, Jianfeng
AU - Komarneni, Sridhar
N1 - Publisher Copyright:
© 2021 Elsevier Inc.
PY - 2021/2
Y1 - 2021/2
N2 - 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.
AB - 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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U2 - 10.1016/j.micromeso.2021.110902
DO - 10.1016/j.micromeso.2021.110902
M3 - Article
AN - SCOPUS:85100417268
SN - 1387-1811
VL - 315
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
M1 - 110902
ER -