TY - JOUR
T1 - Co single atom coupled oxygen vacancy on W18O49 nanowires surface to construct asymmetric active site enhanced peroxymonosulfate activation
AU - Zhu, Shumin
AU - Ruan, Qingdong
AU - Zhu, Xingwang
AU - Li, Dan
AU - Wang, Bin
AU - Huang, Chao
AU - Liu, Liangliang
AU - Xiong, Fangyu
AU - Yi, Jianjian
AU - Song, Yanhua
AU - Liu, Jinyuan
AU - Li, Huaming
AU - Chu, Paul K.
AU - Xu, Hui
PY - 2024/6/15
Y1 - 2024/6/15
N2 - Enhancing the activation of peroxymonosulfate (PMS) is essential for generating more reactive oxygen species in advanced oxidation process (AOPs). Nevertheless, improving PMS adsorption and expediting interfacial electron transfer to enhance reaction kinetics pose significant challenges. Herein, we construct confined W18O49 nanowires with asymmetric active centers containing Co-Vo-W (Vo: oxygen vacancy). The design incorporates surface-rich Vo and single-atom Co, and the resulting material is employed for PMS activation in water purification. By coupling unsaturated coordinated electrons in Vo with low-valence Co single atoms to construct an the “electron fountainhead”, the adsorption and activation of PMS are enhanced. This results in the generation of more active free radicals (SO4•-, •OH, •O2-) and non-free radicals (1O2) for the decomposition of micropollutants. Thereinto, the degradation rate of bisphenol A (BPA) by Co-W18O49 is 32.6 times faster that of W18O49 monomer, which is also much higher than those of other transition-metal-doped W18O49 composites. This work is expected to help to elucidate the rational design and efficient PMS activation of catalysts with asymmetric active centers. © 2024 Elsevier Inc.
AB - Enhancing the activation of peroxymonosulfate (PMS) is essential for generating more reactive oxygen species in advanced oxidation process (AOPs). Nevertheless, improving PMS adsorption and expediting interfacial electron transfer to enhance reaction kinetics pose significant challenges. Herein, we construct confined W18O49 nanowires with asymmetric active centers containing Co-Vo-W (Vo: oxygen vacancy). The design incorporates surface-rich Vo and single-atom Co, and the resulting material is employed for PMS activation in water purification. By coupling unsaturated coordinated electrons in Vo with low-valence Co single atoms to construct an the “electron fountainhead”, the adsorption and activation of PMS are enhanced. This results in the generation of more active free radicals (SO4•-, •OH, •O2-) and non-free radicals (1O2) for the decomposition of micropollutants. Thereinto, the degradation rate of bisphenol A (BPA) by Co-W18O49 is 32.6 times faster that of W18O49 monomer, which is also much higher than those of other transition-metal-doped W18O49 composites. This work is expected to help to elucidate the rational design and efficient PMS activation of catalysts with asymmetric active centers. © 2024 Elsevier Inc.
KW - Advanced oxidation processes
KW - bisphenol A degradation
KW - Co single atoms
KW - PMS activation
KW - W18O49 nanowires
UR - http://www.scopus.com/inward/record.url?scp=85187788255&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85187788255&origin=recordpage
U2 - 10.1016/j.jcis.2024.02.166
DO - 10.1016/j.jcis.2024.02.166
M3 - RGC 21 - Publication in refereed journal
C2 - 38492375
SN - 0021-9797
VL - 664
SP - 736
EP - 747
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
ER -