TY - JOUR
T1 - Dual-reaction center catalyst based on common metals Cu-Mg-Al for synergistic peroxymonosulfate adsorption-activation in Fenton-like process
AU - Xie, Zhiqun
AU - Dionysiou, Dionysios D.
AU - Luo, Shuang
AU - Chen, Menglin
AU - Wei, Zongsu
N1 - Publisher Copyright:
© 2023 The Authors
PY - 2023/6
Y1 - 2023/6
N2 - To improve the peroxymonosulfate (PMS) utilization and the catalyst stability, a dual-reaction center catalyst, Cu-Mg0.388Al2.408O4-BN, was fabricated free of expensive rare metals. The presence of Mg leads to a positive-charged surface that was highly favorable for adsorbing bisphenol A (BPA) and PMS anions under neutral pH conditions. The relatively low electronegativity of Mg, together with the electronic compensation of cation-π between Cu and boron nitride (BN), resulted in the formation of the electron-rich Cu center. The combination of the electrostatic attraction and dual-reaction center led to the rapid degradation of BPA via a fast electron transfer step from BPA to the electron-rich Cu center, and then to PMS for effective activation. This unique design renders excellent reusability and stability of the catalyst by avoiding the redox cycle of Cu(I)/Cu(II). This research work opens new horizons to use common metals for efficient activation of PMS as economical alternatives over expensive rare metal catalysts in Fenton-like processes.
AB - To improve the peroxymonosulfate (PMS) utilization and the catalyst stability, a dual-reaction center catalyst, Cu-Mg0.388Al2.408O4-BN, was fabricated free of expensive rare metals. The presence of Mg leads to a positive-charged surface that was highly favorable for adsorbing bisphenol A (BPA) and PMS anions under neutral pH conditions. The relatively low electronegativity of Mg, together with the electronic compensation of cation-π between Cu and boron nitride (BN), resulted in the formation of the electron-rich Cu center. The combination of the electrostatic attraction and dual-reaction center led to the rapid degradation of BPA via a fast electron transfer step from BPA to the electron-rich Cu center, and then to PMS for effective activation. This unique design renders excellent reusability and stability of the catalyst by avoiding the redox cycle of Cu(I)/Cu(II). This research work opens new horizons to use common metals for efficient activation of PMS as economical alternatives over expensive rare metal catalysts in Fenton-like processes.
KW - Common metals
KW - Dual-reaction center
KW - Electrostatic attraction
KW - Fenton-like system
KW - PMS
KW - Reusability
UR - http://www.scopus.com/inward/record.url?scp=85148085478&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2023.122468
DO - 10.1016/j.apcatb.2023.122468
M3 - Journal article
AN - SCOPUS:85148085478
SN - 0926-3373
VL - 327
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
M1 - 122468
ER -