TY - JOUR
T1 - Construction of Ag-Bridged Z-Scheme LaFe0.5Co0.5O3/Ag10/Graphitic Carbon Nitride Heterojunctions for Photo-Fenton Degradation of Tetracycline Hydrochloride: Interfacial Electron Effect and Reaction Mechanism
AU - Xu, Xuelian
AU - Lin, Hao
AU - Xiao, Ping
AU - Zhu, Junjiang
AU - Bi, Huiting
AU - Carabineiro, Sónia A. C.
N1 - Funding Information:
X.X. and H.L. contributed equally to this work. Financial support provided by the National Science Foundation of China (21976141, 52002292, 22102123), the Science and Technology Development of Hubei Province (2019ZYYD073, 2021CFA034), the Outstanding Young and Middle‐Aged Scientific and Technological Innovation Team of the Education Department of Hubei Province (T2020011), and the Opening Project of Hubei Key Laboratory of Biomass Fibers and Eco‐Dyeing & Finishing (STRZ2020003) is gratefully acknowledged. This work was also partially supported by FCT – Fundação para a Ciência e a Tecnologia, I.P., under the Scientific Employment Stimulus – Institutional Call (CEECINST/00102/2018) and the Associate Laboratory for Green Chemistry—LAQV, financed by national (Portuguese) funds from FCT/MCTES (UIDB/50006/2020 and UIDP/50006/2020).
Publisher Copyright:
© 2022 Wiley-VCH GmbH.
PY - 2022/2/14
Y1 - 2022/2/14
N2 - Improvements on spectral absorption range and electron–hole (e−/h+) separation efficiency are crucial to effectively design materials for photocatalysis. To reach this objective, ternary Z-scheme LaFe0.5Co0.5O3/Ag10/graphitic carbon nitride (LFCO/Ag10/g-CN) heterojunctions with layered structure are designed. The obtained results show that: 1) the Ag nanoparticles (NPs) act as bridges to link LFCO and g-CN, providing a place for recombination of useless electrons and holes; 2) some of the Ag atoms enter the LFCO lattice as Ag+, but most of them are at the surface in the form of Ag NPs, while g-CN coats the surface of LFCO/Ag10 as a thin film; 3) LFCO/Ag10/g-CN exhibits improved e−/h+ separation efficiency, electron transfer rate, and photocurrent response, compared to g-CN and LFCO/Ag10 alone. Catalytic tests show that LFCO/Ag10/g-CN is active for photo-Fenton degradation of tetracycline hydrochloride (TC), with 87% TC conversion obtained at 40 min. Mechanistic studies show that •O2− and •OH radicals are the reactive species of the reaction, and a synergistic effect between light and H2O2 is produced by generating extra •OH radicals. LFCO/Ag10/g-CN is also highly stable in the reaction conditions, with no appreciable activity loss up to four reuse cycles.
AB - Improvements on spectral absorption range and electron–hole (e−/h+) separation efficiency are crucial to effectively design materials for photocatalysis. To reach this objective, ternary Z-scheme LaFe0.5Co0.5O3/Ag10/graphitic carbon nitride (LFCO/Ag10/g-CN) heterojunctions with layered structure are designed. The obtained results show that: 1) the Ag nanoparticles (NPs) act as bridges to link LFCO and g-CN, providing a place for recombination of useless electrons and holes; 2) some of the Ag atoms enter the LFCO lattice as Ag+, but most of them are at the surface in the form of Ag NPs, while g-CN coats the surface of LFCO/Ag10 as a thin film; 3) LFCO/Ag10/g-CN exhibits improved e−/h+ separation efficiency, electron transfer rate, and photocurrent response, compared to g-CN and LFCO/Ag10 alone. Catalytic tests show that LFCO/Ag10/g-CN is active for photo-Fenton degradation of tetracycline hydrochloride (TC), with 87% TC conversion obtained at 40 min. Mechanistic studies show that •O2− and •OH radicals are the reactive species of the reaction, and a synergistic effect between light and H2O2 is produced by generating extra •OH radicals. LFCO/Ag10/g-CN is also highly stable in the reaction conditions, with no appreciable activity loss up to four reuse cycles.
UR - http://www.scopus.com/inward/record.url?scp=85122739345&partnerID=8YFLogxK
U2 - 10.1002/admi.202101902
DO - 10.1002/admi.202101902
M3 - Article
AN - SCOPUS:85122739345
SN - 2196-7350
VL - 9
JO - Advanced Materials Interfaces
JF - Advanced Materials Interfaces
IS - 5
M1 - 2101902
ER -