Abstract
Mussel-inspired linking of β-FeOOH (akaganeite) on core Fe3O4 nanoparticles (NPs) was successfully attempted to produce a novel hybrid photocatalyst that facilitates both visible-light-driven photocatalysis and easy recovery using an external magnetic force. A catechol-quaternized poly(vinyl pyrrolidone) was adopted as a double-sided molecular tape between β-FeOOH and the Fe3O4 NPs, which successfully incorporated robust molecular linking. The β-FeOOH/Fe3O4 hybrid photocatalysts showed photodegradation efficiencies greater than 90% within 3 h of using rhodamine B as a model compound for environmental pollutants upon irradiation of visible light using a lamp through the heterogeneous photo-Fenton-like process in the presence of H2O2. The β-FeOOH/Fe3O4 hybrid photocatalyst is a promising visible-light-driven photocatalyst due to its narrow band gap 1.79 eV, and it can be repeatedly recovered and recycled up to 4 cycles. This concept of double-sided molecular tape can be widely applied for the generation of novel and robust hybrid nanomaterials, affording synergistic performance enhancements.
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Acknowledgements
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2015R1D1A3A01020192) and a Grant (No. 10049064) by Industrial Technology Innovation Program funded by Ministry of Trade, Industry & Energy (MI, Korea).
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Nur’aeni, Chae, A., Jo, S. et al. Synthesis of β-FeOOH/Fe3O4 hybrid photocatalyst using catechol-quaternized poly(N-vinyl pyrrolidone) as a double-sided molecular tape. J Mater Sci 52, 8493–8501 (2017). https://doi.org/10.1007/s10853-017-0910-3
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DOI: https://doi.org/10.1007/s10853-017-0910-3