Abstract
Abstract MnOx/MIL-101 was prepared via incorporating MIL-101, a Cr(III) based MOFs, with MnOx by a photo-deposition method. Multiple techniques XRD, SEM, TEM, XPS, ESR, PL DLS were applied to investigate the structure, photocatalytic activity and mechanism of as-prepared sample. The Cr(III)-oxo clusters in MnOx/MIL-101 and MIL-101 are proposed to be responsible for visible light absorption and also act as an electron trap. MnOx/MIL-101 exhibits much higher photocatalytic activity than pure MIL-101 for degradation of RhB and MB dye under visible light irradiation and the best content of MnOx is 0.050 mol%. This is attributed to the close interaction between MIL-101 and MnOx. The holes can be transferred from MIL-101 to MnOx which is a perfect deriving-hole-types co-catalyst. This not only brings an excellent separation efficiency of the photo-generated carriers, but also another active species •OH, resulting in a higher photocatalytic activity.
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