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- W4294308188 endingPage "138943" @default.
- W4294308188 startingPage "138943" @default.
- W4294308188 abstract "For photocatalytic toluene oxidation, available photo-generated charges and active oxygen species are of great importance. Due to the advantages of K+ and CeO2, CeO2/K-OMS-2 (Ce/KM) were prepared for photocatalytic toluene oxidation, which exhibited better activity and stability than that of Ce/0M (no K+) and K-OMS-2. The band structures and DFT calculations revealed that K+ in the K-OMS-2 tunnels changing Fermi levels led to Z-scheme heterojunction formation, and acting as charge modulation kinetically promoted photo-charge transfer. Meanwhile, the charge balance of K+ increased the proportion of Mn3+, leading to the generation of hydroxyl groups for toluene adsorption via strong OH-π interactions. In addition, oxygen adsorbed on Ce3+ and □-Ce3+-O-Ce4+, and enhanced oxygen migration were observed on Ce/KM, which further interacted with photo-generated charges to generate radicals. In situ DRIFTS and GC–MS suggested the degradation pathway, i.e., the oxidizing radicals on Ce/KM attacked methyl of toluene, formed benzaldehyde, benzoic acid intermediates, opened benzene ring and finally mineralized into carbon dioxide and water. Notably, benzyl alcohol intermediate deposited and poisoned only K-OMS-2, not Ce/KM, confirming the excellent stability of Ce/KM. Furthermore, the effects of the humidity on reaction process were revealed." @default.
- W4294308188 created "2022-09-02" @default.
- W4294308188 creator A5012068031 @default.
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- W4294308188 creator A5073123246 @default.
- W4294308188 creator A5082509409 @default.
- W4294308188 date "2023-01-01" @default.
- W4294308188 modified "2023-10-11" @default.
- W4294308188 title "K+ and CeO2 nanoparticles modified OMS-2 nanorods for enhanced activity and stability of photocatalytic toluene oxidation: K+ charge modulation and mechanistic investigation" @default.
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