TY - JOUR
T1 - Degradation of Orange II by Fe2O3 and CeO2 nanocomposite when assisted by NaHSO3
AU - Lei, Yu
AU - Hao, Yixing
AU - Cheng, Hao
AU - Ma, Jianfeng
AU - Qin, Yong
AU - Kong, Yong
AU - Komarneni, Sridhar
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/11/5
Y1 - 2021/11/5
N2 - Fe2O3@CeO2 nanocomposites were synthesized by water bath heating method to activate NaHSO3 for Orange II dye (50 mg L−1) degradation, which reached up to 98.2% within 120 min. The Fe2O3@CeO2 and NaHSO3 dosages and the molar ratios of Ce and Fe in Fe2O3@CeO2 were investigated to obtain the optimum conditions as follows: 0.02 g Fe2O@CeO2, 0.1 g NaHSO3 and the molar ratio of Ce and Fe was 5:2 (designated as Ce-Fe-1, or simply Fe2O3@CeO2). In addition, Fe2O3@CeO2 catalyst displayed superior catalytic performance to those materials that were previously reported, as verified by the good stability (reached 90.9% after three cycles) and high degradation rate of Orange II (98.2%) of the currently developed material. Existence of ·SO4– and ·OH radicals were verified by Electron Spin Resonance Spectroscopy during degradation, and these radicals are proposed to have high degradation efficiency of Orange II. On the basis of the detected radicals, a possible degradation mechanism was proposed to provide more choices for the application of sulfite in advanced oxidation processes (AOPs).
AB - Fe2O3@CeO2 nanocomposites were synthesized by water bath heating method to activate NaHSO3 for Orange II dye (50 mg L−1) degradation, which reached up to 98.2% within 120 min. The Fe2O3@CeO2 and NaHSO3 dosages and the molar ratios of Ce and Fe in Fe2O3@CeO2 were investigated to obtain the optimum conditions as follows: 0.02 g Fe2O@CeO2, 0.1 g NaHSO3 and the molar ratio of Ce and Fe was 5:2 (designated as Ce-Fe-1, or simply Fe2O3@CeO2). In addition, Fe2O3@CeO2 catalyst displayed superior catalytic performance to those materials that were previously reported, as verified by the good stability (reached 90.9% after three cycles) and high degradation rate of Orange II (98.2%) of the currently developed material. Existence of ·SO4– and ·OH radicals were verified by Electron Spin Resonance Spectroscopy during degradation, and these radicals are proposed to have high degradation efficiency of Orange II. On the basis of the detected radicals, a possible degradation mechanism was proposed to provide more choices for the application of sulfite in advanced oxidation processes (AOPs).
UR - https://www.scopus.com/pages/publications/85111991018
UR - https://www.scopus.com/pages/publications/85111991018#tab=citedBy
U2 - 10.1016/j.colsurfa.2021.127315
DO - 10.1016/j.colsurfa.2021.127315
M3 - Article
AN - SCOPUS:85111991018
SN - 0927-7757
VL - 628
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
M1 - 127315
ER -