Highly Uniform Core/Shell Structured CoFe2O4/MIL-100(Fe) Nanofibers for Efficient Visible Light Photocatalysis

Abstract

Novel CoFe 2 O 4 /MIL-100(Fe) (CFO/MIL-100(Fe)) core/shell nanofibers were prepared by successive ionic layer adsorption and reaction (SILAR) assembly of MIL-100(Fe) on electrospun CoFe 2 O 4 nanofibers. The MIL-100(Fe) shells were constructed on the dispersed CoFe 2 O 4 fiber surface with high uniformity, homogeneous thickness and high stability. Due to the inherent porosity of MIL-100(Fe), a higher specific surface area of 225.77 m 2 /g is achieved for the CFO/MIL-100(Fe)-10 sample. The formed CFO/MIL-100(Fe) catalysts exhibit high catalytic activity towards degradation of rhodamine B (RhB) under visible light irradiation. The photocatalytic activity remains above 77 % within 60 min illumination after four cycles. Due to the simple synthetic method, highly uniform structure, strong magnetic recoverable, as well as good photocatalytic performance, the obtained CFO/MIL-100(Fe) core/shell nanofibers could be promising photocatalysts for practical application.