Controlled synthesis and photocatalysis of sea urchin-like Fe3O4@TiO2@Ag nanocomposites

Nanoscale
Yilin ZhaoHaijia Su

Abstract

Based on the synergistic photocatalytic activities of nano-sized TiO2 and Ag, as well as the magnetic properties of Fe3O4, a sea urchin-like Fe3O4@TiO2@Ag nanocomposite (Fe3O4@TiO2@Ag NCs) is controllably synthesized with tunable cavity size, adjustable shell layer of TiO2 nanofiber, higher structural stability and larger specific surface area. Here, Fe3O4@TiO2@Ag NCs are obtained with Fe3O4 as the core and nanofiber TiO2/Fe3O4/Ag nanoheterojunctions as the shell; and Ag nanoparticles with diameter of approximately 4 nm are loaded both on TiO2 nanofibers and inside the cavities of sea urchin-like Fe3O4@TiO2 nanocomposites uniformly. Ag nanoparticles lead to the production of more photogenerated charges in the TiO2/Fe3O4/Ag heterojunction via LSPR absorption, and enhance the band-gap absorption of TiO2, while the Fe3O4 cocatalyst provides the active sites for oxygen reduction by the effective transfer of photogenerated electrons to oxygen. So the photocatalytic performance is improved due to the synergistic effect of TiO2/Fe3O4/Ag nanoheterojunctions. As photocatalysts under UV and visible irradiation, the as-synthesized nanocomposites display enhanced photocatalytic and recycling properties for the degradation of ampicillin. Mo...Continue Reading

References

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Oct 8, 2013·The Science of the Total Environment·Wang-Wang TangBin-Bin Huang

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Citations

Nov 24, 2017·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Tianjie HongMingxuan Lan
May 31, 2019·Advanced Materials·Aiyun MengJiaguo Yu
Dec 26, 2018·Advanced Science·Shuaihua ZhangYusuke Yamauchi
Jun 3, 2021·Nanomaterials·Thi Thuy NguyenThi Anh Ho

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