TY - JOUR
T1 - Molecular levels unveil the membrane fouling mitigation mechanism of a superpotent N-rGO catalytic ozonation membrane
T2 - Interfacial catalytic reaction pathway and induced EfOM transformation reactions
AU - Song, Zilong
AU - Wang, Zhenbei
AU - Ma, Jun
AU - Sun, Jingyi
AU - Li, Chen
AU - Xu, Xiaotong
AU - Chen, Chao
AU - Chen, Zhonglin
AU - Xu, Bingbing
AU - Jiang, Yi
AU - Kumirska, Jolanta
AU - Siedlecka, Ewa Maria
AU - Ikhlaq, Amir
AU - Qi, Fei
AU - Ismailova, Oksana
N1 - Funding Information:
We thank the National Key Research and Development Program of China ( 2021YFE0100800 ), the National Natural Science Foundation of China ( 51878047 , 22076012 and 52100002 ), the Beijing Forestry University Outstanding Young Talent Cultivation Project ( 2019JQ03008 ), China Postdoctoral Science Foundation ( 2021M700448 ), Beijing Natural Science Foundation ( L182027 ), and Beijing Municipal Education Commission through the Innovative Transdisciplinary Program "Ecological Restoration Engineering" ( GJJXK210102 ) for funding supporting.
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/12/15
Y1 - 2022/12/15
N2 - This study investigated the membrane fouling self-cleaning of N-doped reduced graphene oxide (N-rGO)-tailored ceramic membrane with ozone (N-rGO-CM-O/F) at the molecular level. Density functional theoretical (DFT) revealed the principle of interfacial catalytic reaction, and the transformation of foulants was probed using Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) and various spectroscopic techniques. Results showed that ozone could be aggregated on the N-rGO-CM surface and formed abundant •OH. This made humic acid-like substances blocking membrane pores to be sufficiently and preferentially removed in N-rGO-CM-O/F by 18-types reactions of catalytic ozonation. Conversely, CM-O/F preferentially removed protein-like substances that formed the cake layer. Due to the stronger catalytic ozonation ability and efficient fouling mitigation behavior, N-rGO-CM-O/F showed higher water flux as 1.96 times than that of CM-O/F. Overall, this study provided molecular insight into the mechanism of membrane fouling mitigation, which will facilitate the design and application of advanced catalytic membranes.
AB - This study investigated the membrane fouling self-cleaning of N-doped reduced graphene oxide (N-rGO)-tailored ceramic membrane with ozone (N-rGO-CM-O/F) at the molecular level. Density functional theoretical (DFT) revealed the principle of interfacial catalytic reaction, and the transformation of foulants was probed using Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) and various spectroscopic techniques. Results showed that ozone could be aggregated on the N-rGO-CM surface and formed abundant •OH. This made humic acid-like substances blocking membrane pores to be sufficiently and preferentially removed in N-rGO-CM-O/F by 18-types reactions of catalytic ozonation. Conversely, CM-O/F preferentially removed protein-like substances that formed the cake layer. Due to the stronger catalytic ozonation ability and efficient fouling mitigation behavior, N-rGO-CM-O/F showed higher water flux as 1.96 times than that of CM-O/F. Overall, this study provided molecular insight into the mechanism of membrane fouling mitigation, which will facilitate the design and application of advanced catalytic membranes.
KW - Catalytic ozonation membrane
KW - Density functional theory
KW - FT-ICR-MS
KW - Membrane fouling
KW - N-doped grapheme
UR - https://www.scopus.com/pages/publications/85138809109
U2 - 10.1016/j.apcatb.2022.121943
DO - 10.1016/j.apcatb.2022.121943
M3 - Journal article
AN - SCOPUS:85138809109
SN - 0926-3373
VL - 319
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
M1 - 121943
ER -