TY - JOUR
T1 - Incorporating Fe, Co co-doped graphene with PDI supermolecular for promoted photocatalytic activity
T2 - A story of electron transfer
AU - Liu, Jinyuan
AU - Peng, Qichang
AU - Yang, Ruizhe
AU - Wang, Bin
AU - Zhang, Xiaolin
AU - Wang, Rong
AU - Zhu, Xingwang
AU - Cheng, Ming
AU - Xu, Hui
AU - Li, Huaming
PY - 2023/5
Y1 - 2023/5
N2 - Iron-cobalt dual single-atom anchoring on nitrogen-doped graphene (FexCoy-NG) improves the efficiency of migration and separation of photo-generated carriers. In this work, the perylene diimide (PDI) is self-assembled on the FexCoy-NG to form the FexCoy-NG/PDI composites by π-π interaction, which is reported for the first time. The bisphenol A (BPA) degradation of optimized 20% Fe0.2Co0.8-NG/PDI are nearly 100%, and the degradation rate is 1.5 and 12.7 times that of the self-assembled PDI and commercial-grade PDI. The high degradation performance by FexCoy-NG/PDI are mainly due to: (i) regulating the proportion of Fe-Co dual active sites content, so that it can achieve the synergistic interaction to facilitate the transfer of electrons in the catalytic reaction. (ii) PDI is uniformly dispersed by adding the FexCoy-NG, which increases the specific surface area of composites to adsorb more pollutants. Free radical trapping experiments and electron spin-resonance spectroscopy characterization confirmed that the •O2-,•OH, 1O2 and h+ are the main reactive species (RSs) for BPA degradation. Under the attack of RSs, BPA completes the processes of hydroxylation, demethylation, aromatization, ring-opening, and finally complete mineralization into CO2 and H2O. These results revealed that Fe0.2Co0.8-NG/PDI photocatalysts may be efficiently applied for the remediation of phenol contaminated natural waters. Copyright © 2022 Elsevier Inc. All rights reserved.
AB - Iron-cobalt dual single-atom anchoring on nitrogen-doped graphene (FexCoy-NG) improves the efficiency of migration and separation of photo-generated carriers. In this work, the perylene diimide (PDI) is self-assembled on the FexCoy-NG to form the FexCoy-NG/PDI composites by π-π interaction, which is reported for the first time. The bisphenol A (BPA) degradation of optimized 20% Fe0.2Co0.8-NG/PDI are nearly 100%, and the degradation rate is 1.5 and 12.7 times that of the self-assembled PDI and commercial-grade PDI. The high degradation performance by FexCoy-NG/PDI are mainly due to: (i) regulating the proportion of Fe-Co dual active sites content, so that it can achieve the synergistic interaction to facilitate the transfer of electrons in the catalytic reaction. (ii) PDI is uniformly dispersed by adding the FexCoy-NG, which increases the specific surface area of composites to adsorb more pollutants. Free radical trapping experiments and electron spin-resonance spectroscopy characterization confirmed that the •O2-,•OH, 1O2 and h+ are the main reactive species (RSs) for BPA degradation. Under the attack of RSs, BPA completes the processes of hydroxylation, demethylation, aromatization, ring-opening, and finally complete mineralization into CO2 and H2O. These results revealed that Fe0.2Co0.8-NG/PDI photocatalysts may be efficiently applied for the remediation of phenol contaminated natural waters. Copyright © 2022 Elsevier Inc. All rights reserved.
KW - Fe-Co dual active sites
KW - Nitrogen-doped graphene
KW - Photo-catalytic degradation efficient
KW - Self-assembly PDI
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U2 - 10.1016/j.jcis.2022.12.145
DO - 10.1016/j.jcis.2022.12.145
M3 - RGC 21 - Publication in refereed journal
C2 - 36689801
SN - 0021-9797
VL - 637
SP - 94
EP - 103
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
ER -