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Highly-Oriented One-Dimensional MOF-Semiconductor Nanoarrays for Efficient Photodegradation of Antibiotics


The ineffective removal of antibiotics from the aquatic environment has raised serious problems, including chronic toxicity and antibiotic resistance. Among the numerous strategies, photocatalytic degradation appears to be one of the promising methods to remove antibiotics. Semiconductors are the most widely used photocatalysts, whereas, their efficiencies still suffer from the limited light absorption and poor charge separation. Given the exceptional properties including superior surface area and massive active sites, MOFs are excellent candidates for the formation of hierarchical nanostructures with semiconductors to address the above issues. In this study, highly-oriented one-dimensional (1D) MIL-100(Fe)/TiO2 nanoarrays were developed as photocatalysts for the first time (MIL = Materials Institute Lavoisier). The 1D structured TiO2 nanoarrays not only enable the direct and enhanced charge transport, but also permit easy recycle. With the in situ growth of MIL-100(Fe) on the TiO2 nanoarrays, the composite exhibits enhanced light absorption, electron/hole separation, and accessibility of active sites. As a result, the photodegradation efficiency of tetracycline, a representative antibiotic, by the MIL-100(Fe)/TiO2 composite nanoarrays was achieved up to 90.79%, much higher than that of pristine TiO2 nanoarrays (35.22%). It is also worth mentioning that the composite nanoarrays demonstrate high stability and still possess high efficiency twice of the pristine TiO2 nanoarrays even in the 5th run. This study offers a new strategy for the degradation of antibiotics by using 1D MOFs-based nanocomposite nanoarrays.

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Publication details

The article was received on 30 Jan 2018, accepted on 11 Mar 2018 and first published on 12 Mar 2018

Article type: Paper
DOI: 10.1039/C8CY00229K
Citation: Catal. Sci. Technol., 2018, Accepted Manuscript
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    Highly-Oriented One-Dimensional MOF-Semiconductor Nanoarrays for Efficient Photodegradation of Antibiotics

    X. He, V. Nguyen, J. Zhang, D. Wang, Z. Zhu and W. Wang, Catal. Sci. Technol., 2018, Accepted Manuscript , DOI: 10.1039/C8CY00229K

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